JP5036432B2 - Fluid control device - Google Patents

Description

  The present invention relates to a fluid control device that is attached to an endoscope and controls a fluid transfer state in the endoscope.

  Conventionally, various fluid control devices for controlling the fluid transfer state in an endoscope have been used.

  Patent Document 1 discloses an endoscope having an air / water supply control valve and a suction control valve. That is, in the endoscope of Patent Document 1, an endoscope operation unit that is gripped and operated by an operator is connected to a proximal end portion of an elongated endoscope insertion portion that is inserted into a body cavity. A universal cord for connecting the endoscope main body and the peripheral device is extended from the endoscope operation unit. From the distal end of the endoscope insertion section to the extended end of the universal cord, an air supply path, a water supply path, and a suction path are extended, and the extended end of the universal cord is connected to the air supply / water supply apparatus and the suction apparatus. Connected. In the endoscope operation section, an air supply / water supply control valve and a suction control valve are provided in the air supply path, the water supply path, and the suction path. These control valves are composed of a cylinder and a piston, and an air supply state and a suction state can be controlled by operating a piston protruding from the endoscope operation unit main body.

  Patent Document 2 discloses a specific configuration of an air / water supply control valve used in an endoscope as described above.

Patent Document 3 discloses a suction control device attached to an endoscope. That is, in the endoscope of Patent Document 3, a suction path extends from the distal end portion of the endoscope insertion portion to the attachment portion of the endoscope operation portion, and a suction control device is attached to the attachment portion. In the suction control device, a cylinder communicated with the suction path is further communicated with the suction base, a suction tube is connected to the suction base, and the suction tube is connected to the suction device. In the suction control device, the suction state can be controlled by projecting and retracting the projecting end of the piston body that is disposed in the cylinder and projects from the cylinder.
JP-A-9-84756 JP 2003-52621 A JP-A-8-299265

  As the fluid control device, the end of the tube for transferring the fluid is connected to the connection portion of the base, and the operation portion for controlling the fluid transfer state is provided on the connection direction side of the tube with respect to the connection portion When using a control device, the end of the tube interferes with the operating unit, or the end of the tube interferes with the operator's finger when operating the operating unit. There is a risk that it will be difficult to carry out the process smoothly and reliably.

  The present invention has been made paying attention to the above-mentioned problems, and an object of the present invention is to provide a fluid control apparatus capable of smoothly and reliably operating a fluid transfer state.

In one embodiment of the present invention, the fluid control device is a fluid control device mounted on an endoscope, and includes a conduit that transfers fluid, a base that forms one end of the conduit, A connection portion provided at one end portion and connected to an end portion of a tube that transfers fluid; and a leak hole provided on a connection direction side of the tube with respect to the connection portion; an operation unit for controlling the transport state of the fluid in the conduit by opening and closing the hole, is provided between the leak hole of the operating portion and the connecting portion, wherein abuts against an end portion of the tube characterized by comprising a contact portion that to prevent interference between the tube and the operating unit.

In another embodiment of the present invention, the fluid control device is a fluid control device mounted on an endoscope, and includes a suction path, a suction base that forms one end side of the suction path, and the suction base. A suction connection portion provided at one end portion, to which an end portion of the suction tube is extrapolated and connected, a suction operation portion for controlling a suction state in the suction path, an air supply path, and an air supply path; An air supply base that forms one end side, an air supply connection portion that is provided at one end of the air supply base and is connected by extrapolation of an end of an air supply tube, and the air supply connection portion An air supply operation unit for controlling an air supply state in the air supply path by opening and closing the leak hole; and an air supply connection unit and the air supply unit. provided between the leak hole of the gas operating portion, it abuts against the end portion of the air supply tube Serial contact portion that to prevent interference between the air supply tube and the operating unit, characterized by including the.

  In the fluid control device according to one embodiment of the present invention, when the end of the tube is connected to the connection portion of the base, the end of the tube is brought into contact with the contact portion in the connecting direction of the end of the tube. Movement is restricted. For this reason, the end portion of the tube is less likely to interfere with the operation portion, and the end portion of the tube is less likely to interfere with the operator's finger when operating the operation portion. Therefore, it is possible to smoothly and reliably perform the operation of the fluid transfer state.

  In the fluid control device according to another embodiment of the present invention, when the end of the air supply tube is connected to the air supply connection portion of the air supply base, the end portion of the air supply tube is brought into contact with the contact portion. Thus, movement of the end portion of the air supply tube in the connecting direction is restricted. For this reason, the end of the air supply tube rarely interferes with the air supply operation unit, and the end of the air supply tube hardly interferes with the operator's finger when operating the air supply operation unit. It has become. Therefore, the air supply operation can be performed smoothly and reliably.

  Embodiments of the present invention will be described below with reference to the drawings.

  1 to 10 show a first embodiment of the present invention.

  Referring to FIG. 1, an endoscope 16 of an endoscope apparatus has an elongated endoscope insertion portion 17 that is inserted into a body cavity. The endoscope insertion portion 17 is formed by sequentially connecting a distal end rigid portion 18, a bending portion 19 that is operated to bend, and a long and flexible flexible tube portion 20 from the distal end side. An endoscope operation unit 21 that is gripped and operated by an operator is connected to the proximal end portion of the endoscope insertion unit 17. The endoscope operation section 21 is formed by an endoscope gripping section 22 on the distal end side and an endoscope operation section main body 23 on the proximal end side. In the endoscope operation section main body 23, a bending lever 24 for operating the bending section 19 is provided. A channel 25 is extended from the distal end portion of the endoscope insertion portion 17 to the endoscope operation portion 21 as an air supply / suction path for suction, air supply, and treatment instrument insertion. The distal end portion of the channel 25 is opened at the distal end portion of the endoscope insertion portion 17 to form a channel opening portion 26 for suction, air supply, and projection of the treatment instrument. On the other hand, the proximal end side of the channel 25 is branched in the endoscope operation section 21, and one branch end is connected to a treatment instrument insertion port 27 into which a treatment instrument is inserted, and the other branch end. Is connected to a mounting portion 29 to which the fluid control device 28 is detachably mounted. A suction tube 32 and an air supply tube 33 are connected to the suction base 30 and the air supply base 31 of the fluid control device 28, respectively. The suction tube 32 and the air supply tube 33 are connected to a suction device and an air supply device, respectively.

  The fluid control device 28 will be described in detail with reference to FIGS.

  Hereinafter, the suction control mechanism of the fluid control device 28 will be described.

  With reference to FIG. 2, the attachment portion 29 to which the fluid control device 28 is attached is formed by a circular attachment tube 34 disposed in the endoscope operation portion 21. A substantially circular cylinder 35 of the fluid control device 28 is inserted into the attachment tube 34. In order to hold the cylinder 35 in the mounting pipe 34, concave and convex engaging portions 36 that are engaged with each other are formed on the inner peripheral surface of the mounting pipe 34 and the outer peripheral surface of the cylinder 35. On the outer peripheral surface of the lower end portion of the cylinder 35, a seal convex portion 37 is extended over the entire circumference in order to seal the inside of the attachment tube 34 against the outside. The cylinder 35 is rotatable while maintaining a sealed state about its own central axis while being attached to the attachment pipe 34.

  On the outer peripheral surface on the upper end side of the cylinder 35, a substantially cylindrical suction cap 30 is integrally projected. A suction connection portion 38 is formed at the protruding end portion of the suction base 30 to which the end portion of the suction tube 32 is extrapolated and connected. That is, the suction path 39 is formed by the lumen of the cylinder 35 and the lumen of the suction cap 30.

  A substantially cylindrical operation member 40 is coaxially connected to the upper end of the cylinder 35. The operation member 40 is rotatable with respect to the cylinder 35 about its own central axis. In other words, the sliding concave portion 41 extending over the entire circumference on the outer peripheral surface of the upper end portion of the cylinder 35 is provided with the sliding convex portion 42 extending over the entire inner peripheral surface of the lower end portion of the operating member 40. It is slidably accommodated. A suction leak hole 43 communicating with the inner cavity of the cylinder 35 is formed in the side wall of the operation member 40. The operation member 40 is formed of elastic rubber or the like, and can be compressed and deformed in the axial direction by folding the side wall so as to protrude outward (see FIG. 9). A cylindrical central opening is formed in each of the lower end wall and the upper end wall of the operation member 40. On the inner surface of the upper end wall, a tapered seal surface 44 is formed that is inclined downward in the axial direction and radially inward. When the operation member 40 is in the maximum compression state, the seal surface 44 is brought into contact with the edge portion 45 of the central opening of the lower end wall, and the suction leak hole 43 is sealed against the lumen of the cylinder 35 (FIG. 9). reference).

  A cylindrical piston body 46 is inserted through the operation member 40 and the cylinder 35. The upper end portion of the piston body 46 is inserted into the central opening of the upper end wall of the operation member 40 and is fixed to the upper end wall so as to seal the lumen of the operation member 40 with respect to the outside. A cover member 47 is covered on the upper end surface of the piston body 46, and a suction button 48 as a suction operation unit is formed. The piston body 46 is movable in the axial direction by pressing the suction button 48 and compressing and returning the operating member 40 by releasing the press. Hereinafter, the position of the piston body 46 when the operation member 40 is in the maximum compressed state is referred to as a suction position (see FIG. 9).

  The piston body 46 is formed of a large diameter portion on the upper end side and a small diameter portion on the lower end side. When the piston body 46 is in the non-operation position, the large diameter portion on the upper end side is generally disposed outside the cylinder 35. The outer diameter of the large-diameter portion of the piston body 46 is smaller than the diameter of the central opening of the lower end wall of the operation member 40, and communication between the lumen of the cylinder 35 and the suction leak hole 43 of the operation member 40 is ensured.

  A valve body 49 is formed at the lower end of the piston body 46. On the other hand, a tapered wall extending in the axially downward and radially inward direction extends from the inner peripheral surface of the lower end portion of the cylinder 35, and is concentrically cylindrical with the cylinder 35 body continuously from the tapered wall. A valve seat 51 is provided. The valve body 49 of the piston body 46 is disposed in the valve seat 51 of the cylinder 35 when the piston body 46 is in the non-operating position, and seals the lumen of the cylinder 35 against the lumen of the mounting tube 34. . On the other hand, the valve body 49 is disposed outside the valve seat 51 when the piston body 46 is in the suction position (see FIG. 9). In the piston body 46, a concave groove-like introduction portion 52 extends in the axial direction above the valve body 49. The introduction portion 52 is disposed in the cylinder 35 when the piston body 46 is in the non-operation position. On the other hand, when the piston body 46 is in the suction position, the introduction portion 52 is disposed across the entire valve seat 51 from the lower side to the upper side of the valve seat 51 of the cylinder 35, and the lumen of the mounting tube 34 and the cylinder 35. Is communicated with the lumen (see FIG. 9).

  Referring to FIG. 5, in the piston body 46, the cross section is substantially C-shaped in the region where the introduction portion 52 is formed. That is, the suction path 39 has a shape with a relatively small surface area relative to the cross-sectional area, and the pipe resistance of the suction path 39 is reduced. In particular, in the valve seat 51, a pair of protruding shapes are formed along the inner peripheral surface of the valve seat 51, and the strength of the piston body 46 is increased.

  Referring to FIGS. 6 and 7, a check valve is provided at the connection portion of the suction cap 30. In the present embodiment, a flap valve 54 having a flap 53 that opens and closes only in the suction direction to connect and close the suction passage 39 is used as the check valve.

  Here, the central axis of the fluid control device 28 is formed by the central axes of the cylinder 35, the operation member 40, and the piston body 46. As described above, since the cylinder 35 is rotatably attached to the attachment tube 34, the fluid control device 28 as a whole is centered on its central axis with respect to the attachment tube 34 by rotating the suction cap 30. It can rotate freely. In order to rotate the fluid control device 28, a rotational biasing force larger than the frictional force between the attachment tube 34 and the cylinder 35 is required.

  Hereinafter, the air supply control mechanism of the fluid control device 28 will be described.

  Referring to FIGS. 2 to 4, a substantially circular air supply base 31 protrudes integrally on the outer peripheral surface of the upper end portion of the piston body 46. An air supply connection portion 55 is formed at the protruding end portion of the air supply base 31 to which the end portion of the air supply tube 33 is extrapolated and connected. The air supply base 31 extends radially inward from the air supply connection portion 55 from the distal end side to the proximal end side, and is bent upward in the axial direction at a contact bending portion 56 as a contact portion. Are bent inward in the radial direction and connected to the cylinder 35. Here, the length between the contact bending portion 56 and the operation bending portion 57 is set larger than the tube wall thickness of the air supply tube 33. The operation bending portion 57 is formed with a planar air supply operation surface 58 facing outward in the radial direction and upward in the axial direction. An air supply leak hole 59 serving as an air supply operation portion that communicates with the inner cavity of the air supply base 31 and opens in a direction orthogonal to the air supply operation surface 58 is disposed substantially at the center of the air supply operation surface 58. . That is, the air supply leak hole 59 is disposed on the connection direction side of the air supply tube 33 with respect to the air supply connection portion 55, and is bent between the air supply connection portion 55 and the air supply leak hole 59. The part 56 is arranged.

  The piston body 46 is formed with first and second divided air supply passages 60a and 60b. That is, the lumen of the air supply base 31 communicates with the lower end portion of the first divided air supply path 60 a of the piston body 46. The upper end portion of the first divided air supply path 60a opens at the upper end surface of the piston body 46 to form a first divided opening portion 61a. The upper end portion of the second divided air supply path 60b of the piston body 46 is also opened at the upper end surface of the piston body 46 to form a second divided opening portion 61b. The first and second divided openings 61 a and 61 b are covered with a cover member 47 that covers the upper end surface of the piston body 46. The peripheral edge portion of the cover member 47 is fixed to the peripheral edge portion of the upper end portion of the piston body 46 so as to seal the inside of the cover member 47 with respect to the outside. The cover member 47 is formed of an elastic material such as rubber or thermoplastic resin, and is in close contact with the upper end surface of the piston body 46 with a certain urging force by its own elasticity. When the pressure is increased in the first divided air supply path 60a, the cover member 47 expands, and the first divided air supply path 60a and the second divided air supply path 60b communicate with each other. Further, when the pressure is reduced in the first or second divided air supply path 60a, 60b, the first or second divided opening 61a, 61b is closed by the cover member 47, and the first divided air supply is performed. The path 60a and the second divided air supply path 60b are blocked. In this embodiment, the cover member 47 is relatively thick, and the urging force of the cover member 47 on the upper end surface of the piston body 46 is set to be relatively large.

  The second divided air supply path 60 b extends from the upper end portion of the piston body 46 to the lower end portion in the axial direction of the piston body 46. Here, the second divided air supply path 60b is arranged eccentrically with respect to the central axis of the piston body 46, and ensures a sufficiently large introduction section 52 cross section in the C-shaped region of the cross section of the piston body 46. It is possible. At the lower end portion of the piston body 46, the second divided air supply path 60b is opened radially outward to form an air supply opening 62. In other words, the air supply opening 62 intersects the central axis direction of the attachment pipe 34 that is the extending direction of the channel 25 and is orthogonally opened in this embodiment.

  Thus, the air supply path 63 as a pipe line is formed by the lumen of the air supply base 31, the first divided air supply path 60a of the piston body 46, the inside of the cover member 47, and the second divided air supply path 60b. Is formed.

  As described above, since the operation member 40 is rotatably connected to the cylinder 35, the rotary assembly including the operation member 40, the piston body 46, the cover member 47, and the air supply base 31 is connected to the cylinder 35. The air supply base 31 can be rotated integrally around the central axis of the fluid control device 28 by rotating the air supply base 31. Here, on the outer peripheral surface of the lower end portion of the piston body 46, a restricting portion 65 that abuts on the restricting surface 64 of the lower end surface of the valve seat 51 of the cylinder 35 and restricts the upward movement of the piston body 46 is provided. Has been. When the piston body 46 is in the non-operation position, the restriction portion 65 is in contact with the restriction surface 64, and the operation member 40 is slightly compressed and deformed in the axial direction. In other words, the upward movement of the piston body 46 due to the urging force of the operation member 40 is restricted by the contact of the restriction portion 65 with the restriction surface 64. For this reason, a constant normal force acts between the lower end surface of the operating member 40 and the upper end surface of the cylinder 35, and the frictional force between the cylinder 35 and the operating member 40 is used to rotate the rotating assembly. A larger, relatively large rotational bias is required.

  Next, the operation of the endoscope apparatus according to this embodiment will be described.

  With reference to FIG.2 and FIG.8, the preparation process of an endoscope apparatus is demonstrated.

  The cylinder 35 of the fluid control device 28 is inserted into the attachment tube 34 of the endoscope operation unit 21 of the endoscope 16 and the engaging portions 36 are engaged with each other, so that the fluid control device 28 is attached to the endoscope 16. To do. Subsequently, one end portion of the suction tube 32 is connected to the suction connection portion 38 of the suction base 30, and the other end portion of the suction tube 32 is connected to the suction device. Further, one end of the air supply tube 33 is connected to the air supply connection portion 55 of the air supply base 31. At this time, if one end portion of the air supply tube 33 is pushed into the air supply connection portion 55 in the connection direction indicated by the arrow C in the figure, the end portion of the air supply tube 33 exceeds the air supply connection portion 55. However, the forward movement is stopped by contacting the bent portion 56 of the air supply base 31. As a result, the end of the air supply tube 33 does not interfere with the air supply operation surface 58 and does not block the air supply leak hole 59. Subsequently, the other end of the air supply tube 33 is connected to the air supply device.

  With reference to FIG. 2, the non-operation state of the fluid control apparatus 28 is demonstrated.

  When the suction device is driven, air outside the fluid control device 28 flows from the suction leak hole 43 of the operation member 40, between the operation member 40 and the cylinder 35, and the piston body 46, via the suction base 30 and the suction tube 32. , Sucked into the suction device. Since the piston body 46 is in the non-operation position, the valve body 49 of the piston body 46 is disposed on the valve seat 51 of the cylinder 35, and the lumen of the piston body 46 is sealed against the lumen of the mounting tube 34. The channel 25 of the endoscope 16 is not sucked.

  When the air supply device is driven, the compressed air is transferred to the air supply base 31 via the air supply tube 33. The compressed air transferred to the air supply base 31 is leaked from the air supply leak hole 59. Here, the direction of the lumen of the air supply base 31 extending from the contact bending portion 56 of the air supply base 31 to the operation bending portion 57 and reaching the air supply leak hole 59 and the opening direction of the air supply leak hole 59 are: The airflows are smoothly discharged from the air supply leak holes 59 because they face the same upper side in the axial direction. For this reason, the pressure hardly increases in the first divided air supply path 60 a of the piston body 46 communicating with the air supply base 31. Accordingly, the first divided opening 61a of the first divided air supply path 60a remains closed by the cover member 47, and the first divided air supply path 60a and the second divided air supply path 60b are blocked. Therefore, air is not supplied to the channel 25 of the endoscope 16.

  With reference to FIG.9 and FIG.10, the suction air supply control by the fluid control apparatus 28 is demonstrated.

  Here, when the endoscope 16 is used, it is usually operated by holding the endoscope insertion portion 17 with one hand and the endoscope operation portion 21 with the other hand. With respect to the endoscope operation unit 21, the endoscope holding unit 22 is held by three fingers excluding the thumb and index finger, the bending lever 24 of the endoscope operation unit body 23 is operated by the thumb, and the fluid control device 28 is operated by the index finger. To do. That is, the suction base 30, the suction button 48, the air supply base 31, and the air supply leak hole 59 of the fluid control device 28 are operated by the index finger.

  The suction control by the fluid control device 28 will be described with reference to FIG.

  When suction is performed from the channel opening 26 at the distal end of the endoscope insertion portion 17, the suction base 30 and the air supply base 31 are rotated and retracted so that the suction button 48 can be easily operated. deep. Due to the frictional force between the mounting tube 34 and the cylinder 35 and the frictional force between the cylinder 35 and the operating member 40, the suction base 30 and the air supply base 31 are held at fixed positions. Then, as indicated by an arrow P1 in the figure, the suction button 48 of the fluid control device 28 is pressed. Here, since the air supply leak hole 59 of the air supply operation surface 58 is disposed away from the suction button 48, it is possible to prevent the air supply leak hole 59 from being accidentally blocked when the suction button 48 is pressed. Is done.

  By pressing the suction button 48, the piston body 46 is moved downward to the suction position with respect to the operation member 40 and the cylinder 35. Then, the operation member 40 is compressed and deformed and folded so that the side wall of the operation member 40 protrudes outward, and the sealing surface 44 of the upper end wall of the operation member 40 contacts the edge portion 45 of the central opening of the lower end wall. Thus, the suction leak hole 43 is sealed with respect to the inner cavity of the cylinder 35. In addition, the valve body 49 of the piston body 46 is moved to the lower outside of the valve seat 51 of the cylinder 35, and the introduction portion 52 of the piston body 46 is disposed across the entire valve seat 51 from the lower side to the upper side of the valve seat 51. The lumen of the attachment tube 34 and the lumen of the cylinder 35 are communicated with each other through the introduction portion 52 of the piston body 46. As a result, from the channel opening 26 at the distal end of the endoscope insertion portion 17, the channel 25 of the endoscope 16, the attachment tube 34, the cylinder 35 of the fluid control device 28, the suction cap 30, and the suction tube 32, Suction is performed. At the time of suction, the flap valve 54 opens the suction path 39 without closing it. Further, the piston body 46 has a substantially C-shaped cross section in the region of the introduction portion 52, and the suction path 39 has a relatively small surface area relative to the cross-sectional area. The path resistance is reduced and the suction efficiency is improved.

  Note that, at the lower end of the piston body 46, the air supply opening 62 opens perpendicularly to the extending direction of the channel 25, so that the suction material enters the second divided air supply path 60b of the piston body 46. Is prevented. Furthermore, the cover member 47 is pressed against the upper end surface of the piston body 46 by pressing the suction button 48, and the pressure in the second divided air supply path 60b is reduced by the suction. And the 2nd division | segmentation opening parts 61a and 61b are fully obstruct | occluded, and the 1st division | segmentation air supply path 60a and the 2nd division | segmentation air supply path 60b are divided reliably. As a result, even if the air supply leak hole 59 is accidentally blocked, air supply is not performed, and the suctioned material has entered the second divided air supply path 60b. In addition, the sucked material is further prevented from entering the cover member 47, the first divided air supply path 60 a, and the air supply base 31, or being ejected from the air supply leak hole 59.

  The air supply control by the fluid control device 28 will be described with reference to FIG.

  When air is supplied from the channel opening 26 at the distal end portion of the endoscope insertion portion 17, the suction base 30 is retracted by rotation so that the air supply leak hole 59 can be easily closed, and the air supply base 31. Is rotated and placed at an appropriate position. Then, as indicated by an arrow P2 in the figure, the air supply operation surface 58 is pressed by the operator's finger 70 to close the air supply leak hole 59. Here, the length between the contact bending portion 56 and the operation bending portion 57 of the air supply base 31 is set to be larger than the tube wall thickness of the tube, and the air supply tube 33 is separated from the air supply operation surface 58. Therefore, when the air supply operation surface 58 is pressed, the operator's finger 70 and the end of the air supply tube 33 interfere with each other, and the pressing operation to the air supply operation surface 58 is performed. There is no hindrance. Further, the pressing direction to the air supply operation surface 58 as the air supply operation direction is obliquely downward with respect to the axial direction of the fluid control device 28, and the axial downward direction that is the suction operation direction of the suction button 48 is Does not match. For this reason, the suction button 48 is prevented from being actuated by pressing the air supply operation surface 58.

  When the air supply leak hole 59 is closed, the pressure in the first divided air supply path 60a increases, the cover member 47 is expanded, and the first divided air supply path 60a and the second divided air supply path are expanded. 60b is communicated. As a result, from the air supply device, the air supply tube 33, the air supply base 31 of the fluid control device 28, the first divided air supply path 60 a, the cover member 47, the second divided air supply path 60 b, and the endoscope 16. Air is supplied from the channel opening 26 via the attachment pipe 34 and the channel 25.

  Note that once the first divided air supply path 60a and the second divided air supply path 60b are communicated with each other, the pressure in the cover member 47 rapidly decreases, the cover member 47 contracts, and the first The divided air supply path 60a and the second divided air supply path 60b are closed. Subsequently, the pressure rises again in the first divided air supply path 60a, the cover member 47 is expanded, and the first divided air supply path 60a and the second divided air supply path 60b communicate with each other. As described above, the expansion and contraction of the cover member 47 are repeated, and the cover member 47 vibrates and generates a sound. The amplitude, period, etc. of the cover member 47 change according to the air supply state such as the air supply amount, the air supply pressure, etc., so that the volume, pitch, etc. change, and the operator of the endoscope 16 is visually observed. It is possible to accurately grasp the air supply state that is difficult to grasp by the pronunciation of the cover member 47. Further, by appropriately setting the thickness, flexibility, etc. of the cover member 47, the volume, pitch, etc. can be adjusted.

  Prevention of malfunction of the fluid control device 28 due to erroneous tube connection will be described.

  If the air supply tube 33 is erroneously connected to the suction base 30 and air is supplied via the suction path 39, unnecessary air supply may occur in the body cavity. In particular, the suction resistance tends to be larger than the air supply resistance, and the pipe resistance of the suction path 39 is set sufficiently smaller than the pipe resistance of the air supply path 63, so that excessive air supply is easily performed. . In the present embodiment, when the air supply tube 33 is erroneously connected to the suction base 30, the suction path 39 is closed by the flap valve 54 of the suction connection portion 38, and air supply via the suction path 39 is prevented.

  On the other hand, if the suction tube 32 is erroneously connected to the air supply base 31 and the air supply path 63 is sucked, the second divided air supply path 60b that is thinner than the suction path 39, the cover member 47, and the first division There is a possibility that the air supply path 60a and the air supply base 31 may be clogged with suction, or the suction may be ejected from the air supply leak hole 59. In the present embodiment, when the suction tube 32 is erroneously connected to the air supply base 31, external air is sucked from the air supply leak hole 59, so that the previous suction from the first divided air supply path 60 a is prevented. Is done. Further, even when the air supply leak hole 59 is accidentally blocked, the pressure of the first divided air supply path 60a decreases, so that the cover member 47 is sucked and the first divided opening 61a is opened. The first divided air supply path 60a and the second divided air supply path 60b are blocked, and the previous suction from the second divided air supply path 60b is prevented.

  After using the endoscope 16, the fluid control device 28 is removed from the endoscope 16 and the endoscope 16 is cleaned. When the suction base 30 is rotated to remove the fluid control device 28 from the attachment tube 34 of the endoscope operation unit 21, stress is concentrated on the connection portion between the suction base 30 and the cylinder 35. Excessive stress is not applied to the flap valve 54 disposed in the suction connection portion 38. Since the channel 25 of the endoscope 16 serves as air supply, suction, and insertion of a treatment instrument and has a simple configuration without a valve structure, it is very easy to clean.

  Therefore, the endoscope apparatus of this embodiment has the following effects.

  In the endoscope apparatus of the present embodiment, when the end of the air supply tube 33 is connected to the air supply connection portion 55 of the air supply base 31, the end of the air supply tube 33 contacts the contact bending portion 56. In contact therewith, movement of the end of the air supply tube 33 in the connection direction C is restricted. For this reason, the air supply leak hole 59 is not blocked by the end of the air supply tube 33, and the end of the air supply tube 33 is not closed by the operator's finger when the air supply leak hole 59 is closed. And the blocking operation of the air supply leak hole 59 is not hindered. Therefore, the air supply operation can be performed smoothly and reliably.

  11 and 12 show a second embodiment of the present invention.

  The air supply base 31 of the present embodiment extends in the radial direction of the piston body 46 over the whole and has substantially the same outer diameter over the entire length. An air supply connecting portion 55 is formed at the distal end portion of the air supply base 31, and an air supply leak hole 59 as an air supply operation portion is formed on the proximal end side of the air supply base 31. Between the air supply connection portion 55 and the air supply leak hole 59, a protruding portion 66 is formed as a flange-like contact portion extending over the entire circumference on the outer peripheral surface of the air supply base 31. When the air supply tube 33 is connected to the air supply base 31, the end of the air supply tube 33 is pushed in the connection direction indicated by the arrow C in the figure and is brought into contact with the protruding portion 66, so that the air supply tube The forward movement of the end portion 33 is restricted. For this reason, the air supply leak hole 59 is not blocked by the end portion of the air supply tube 33, and the operator's finger and the end portion of the air supply tube 33 are closed when the air supply leak hole 59 is closed. Does not interfere with the closing operation to the air supply leak hole 59.

  13 and 14 show a third embodiment of the present invention.

  The air supply base 31 of the present embodiment extends in the radial direction of the piston body 46 as a whole, similarly to the air supply base 31 of the second embodiment, and the air supply connection part 55 is connected to the end of the air supply base 31. Is formed. A circular tubular large-diameter portion 67 having a larger outer diameter than other portions is formed in the middle portion of the air supply base 31. A flat portion perpendicular to the axial direction of the fluid control device 28 is formed on the upper portion of the large-diameter portion 67 to form an air supply operation surface 58. An air supply leak hole 59 communicating with the inner cavity of the air supply base 31 is formed in the air supply operation surface 58. A stepped portion 68 serving as a contact portion is formed between the air supply connection portion 55 and the air supply leak hole 59 by the end-side annular end surface of the large diameter portion 67. The height of the stepped portion 68 is set to be approximately the same as the tube wall thickness of the air supply tube 33. When the air supply tube 33 is connected to the air supply base 31, the end of the air supply tube 33 is pushed in the connection direction indicated by the arrow C in the figure and is brought into contact with the stepped portion 68, so that the air supply tube The forward movement of the end portion 33 is restricted. For this reason, the end of the air supply tube 33 does not interfere with the air supply operation surface 58 and does not close the air supply leak hole 59. The finger is not interfered with the end of the air supply tube 33, and the closing operation to the air supply leak hole 59 is not hindered.

  15 to 18 show a fourth embodiment of the present invention.

  With reference to FIGS. 15 to 18, the air supply base 31 and the extending portion 71 are provided on both sides of the piston body 46 so as to protrude in the opposite directions perpendicular to the axial direction of the piston body 46. An air supply connection portion 55 is formed at the end portion of the air supply base 31. The third divided air supply path 60c extends through the piston body 46 and the extension part 71 in the orthogonal direction described above so as to extend the lumen of the air supply base 31 to the end part of the extension part 71. It extends. An air supply operation surface 58 is formed at the distal end portion of the extending portion 71 so as to be upward in the axial direction and outward in the orthogonal direction. The air supply operation surface 58 is provided with an air supply leak hole 59 that communicates with the third divided air supply passage 60c and opens outward in the orthogonal direction. From the air supply leak hole 59, the first divided air supply path 60a extends in the orthogonal direction, that is, parallel to the third divided air supply path 60c, through the extending portion 71 to the piston body 46, and subsequently. The piston body 46 extends upward in the axial direction and opens at the upper end surface of the piston body 46.

  When connecting the air supply tube 33 to the air supply base 31, the end of the air supply tube 33 is pushed in the connection direction indicated by the arrow C in the figure, and is brought into contact with the side surface 72 of the operation member 40. Advancement of the end of the air supply tube 33 is restricted. That is, in this embodiment, the contact portion is formed by the side surface 72 of the operation member 40 that forms the main body of the fluid control device 28. For this reason, the end of the air supply tube 33 does not interfere with the air supply operation surface 58 and does not close the air supply leak hole 59. The finger is not interfered with the end of the air supply tube 33, and the closing operation to the air supply leak hole 59 is not hindered.

  In addition, since the third divided air supply path 60c and the first divided air supply path 60a extend in parallel to each other toward the air supply leak hole 59 and open in the same direction, In addition, the air supply air hardly flows into the first divided air supply path 60a from the third divided air supply path 60c, and the air supply leaking property is improved.

  Further, as in the first embodiment, the pressing direction to the air supply operation surface 58 is obliquely downward with respect to the axial direction of the fluid control device 28, and is directed downward in the axial direction that is the suction operation direction of the suction button 48. And the suction button 48 is prevented from being actuated by pressing on the air supply operation surface 58.

  In the above-described embodiment, the contact portion is applied to the air supply control mechanism. However, the contact portion can be applied to various fluid control mechanisms such as a suction control mechanism and a water supply control mechanism. In addition, a leak hole that is directly opened and closed by an operator is used as an operation unit for controlling the fluid transfer state, but a valve mechanism that is operated by a push button, a rotation lever, or the like may be used. Good.

The perspective view which shows the endoscope apparatus of 1st Embodiment of this invention. The longitudinal cross-sectional view which shows the fluid control apparatus of 1st Embodiment of this invention. The cross-sectional view which cuts and shows the fluid control apparatus of 1st Embodiment of this invention along the III-III line of FIG. The cross-sectional view which cuts and shows the fluid control apparatus of 1st Embodiment of this invention along the IV-IV line of FIG. The cross-sectional view which cuts and shows the fluid control apparatus of 1st Embodiment of this invention along the VV line of FIG. The side view which cut | disconnects and shows the check valve of the suction nozzle of 1st Embodiment of this invention partially. The cross-sectional view which cuts and shows the non-return valve of the suction cap of 1st Embodiment of this invention along the VII-VII line of FIG. The longitudinal cross-sectional view which shows the fluid control apparatus of 1st Embodiment of this invention in a preparation state. The longitudinal cross-sectional view which shows the fluid control apparatus of 1st Embodiment of this invention in a suction state. The longitudinal cross-sectional view which shows the fluid control apparatus of 1st Embodiment of this invention in an air supply state. The longitudinal cross-sectional view which shows the fluid control apparatus of 2nd Embodiment of this invention. The cross-sectional view which shows the fluid control apparatus of 2nd Embodiment of this invention. The longitudinal cross-sectional view which shows the fluid control apparatus of 3rd Embodiment of this invention. The cross-sectional view which shows the fluid control apparatus of 3rd Embodiment of this invention. The side view which shows the fluid control apparatus of 4th Embodiment of this invention. The cross-sectional view which cuts and shows the fluid control apparatus of 4th Embodiment of this invention along the XVI-XVI line of FIG. The longitudinal cross-sectional view which cuts and shows the fluid control apparatus of 4th Embodiment of this invention along the XVII-XVII line of FIG. The longitudinal cross-sectional view which cuts and shows the fluid control apparatus of 4th Embodiment of this invention along the XVIII-XVIII line of FIG.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 20 ... Endoscope, 25 ... Air supply suction path (channel), 28 ... Fluid control apparatus, 29 ... Mounting part, 30 ... Suction base, 31 ... Base (air supply base), 32 ... Suction tube, 38 ... Suction connection , 39 ... suction path, 48 ... suction operation part (suction button), 55 ... connection part (air supply connection part), 56; 66; 68 ... contact part (56 ... bending part, 66 ... projection part, 68 ... Stepped portion 72, main body portion (side surface), 59, operation portion (air supply operation portion (air supply leak hole)), 63, pipe (air supply passage).

Claims (15)

A fluid control device attached to an endoscope,
A conduit for transferring fluid;
A base forming one end side of the conduit;
A connection part provided at one end of the base and connected to an end of a tube for transferring a fluid by extrapolation;
An operation unit for controlling a fluid transfer state in the pipe line by opening and closing the leak hole, having a leak hole provided on a connection direction side of the tube with respect to the connection unit;
Provided between the leak hole of the operating portion and the connection portion, a contact portion that to prevent interference between the end portion and the abutment has been said tube and said operating portion of said tube,
A fluid control apparatus comprising: The contact portion has a bent portion formed by bending the base in a direction orthogonal to the connecting direction of the tube .
The fluid control apparatus according to claim 1. The contact portion has a flange-like protrusion extending over the entire circumference on the outer peripheral surface of the base ,
The fluid control apparatus according to claim 1. The abutting portion has a stepped portion formed by an annular end surface of the large-diameter portion, in which a circular-shaped large-diameter portion having a larger outer diameter than other portions is formed in an intermediate portion of the base .
The fluid control apparatus according to claim 1. The fluid control device further includes a main body,
The connection portion and the operation portion are provided in different directions with respect to the main body portion, respectively .
The contact portion is formed by the body portion.
The fluid control apparatus according to claim 1. The fluid control device is detachable from the endoscope.
The fluid control apparatus according to claim 1. The fluid control device according to any one of claims 1 to 6,
An endoscope having a mounting portion to which the fluid control device is mounted;
An endoscope apparatus comprising: A fluid control device attached to an endoscope,
A suction path;
A suction base forming one end side of the suction path;
A suction connection portion provided at one end of the suction base, and connected to the end of the suction tube by being extrapolated;
A suction operation unit for controlling a suction state in the suction path;
Airway,
An air supply base that forms one end of the air supply path;
An air supply connection part provided at one end of the air supply base, and connected to the end of the air supply tube extrapolated;
An air supply operation unit for controlling a gas supply state in the air supply path by opening and closing the leak hole, and having a leak hole provided on a connection direction side of the air supply tube with respect to the air supply connection unit; ,
Provided between the air supply connection part and the leak hole of the air supply operation part , and contact with the end of the air supply tube to prevent interference between the air supply tube and the operation part A contact portion,
A fluid control apparatus comprising: The contact portion has a bent portion formed by bending the air supply base in a direction orthogonal to the connection direction of the air supply tube .
The fluid control apparatus according to claim 8. The contact portion has a flange-like protrusion that extends over the entire circumference on the outer peripheral surface of the air supply base ,
The fluid control apparatus according to claim 8. The abutting part has a stepped part formed by a circular-shaped thick part having a larger outer diameter than the other part in an intermediate part of the air supply base, and formed by a terminal-side annular end surface of the thick part. ,
The fluid control apparatus according to claim 8. The fluid control device further includes a main body,
Wherein A air connecting portion and the air supply operation portion is provided in different directions relative to the body portion,
The contact portion is formed by the body portion.
The fluid control apparatus according to claim 8. The fluid control device is integrally formed in a state where the suction operation unit and the air supply operation unit are spaced apart from each other .
The fluid control apparatus according to claim 8. The fluid control device is detachable from the endoscope.
The fluid control apparatus according to claim 8. The fluid control device according to any one of claims 8 to 14,
An endoscope having a mounting portion to which the fluid control device is mounted, and an air suction path connected to the mounting portion and communicated with the suction path and the air supply path;
An endoscope apparatus comprising:

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