WO2020162565A1 - Suction control device for endoscope, and endoscope - Google Patents

Suction control device for endoscope, and endoscope Download PDF

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Publication number
WO2020162565A1
WO2020162565A1 PCT/JP2020/004660 JP2020004660W WO2020162565A1 WO 2020162565 A1 WO2020162565 A1 WO 2020162565A1 JP 2020004660 W JP2020004660 W JP 2020004660W WO 2020162565 A1 WO2020162565 A1 WO 2020162565A1
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WO
WIPO (PCT)
Prior art keywords
suction
movable body
hole
endoscope
connection hole
Prior art date
Application number
PCT/JP2020/004660
Other languages
French (fr)
Japanese (ja)
Inventor
佳弘 上田
Original Assignee
富士フイルム株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 富士フイルム株式会社 filed Critical 富士フイルム株式会社
Priority to JP2020571268A priority Critical patent/JP7119134B2/en
Priority to CN202080013009.XA priority patent/CN113473898B/en
Publication of WO2020162565A1 publication Critical patent/WO2020162565A1/en

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/012—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor characterised by internal passages or accessories therefor
    • A61B1/015—Control of fluid supply or evacuation
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B23/00—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
    • G02B23/24—Instruments or systems for viewing the inside of hollow bodies, e.g. fibrescopes

Definitions

  • the present invention relates to an endoscope suction control device and an endoscope.
  • an endoscope includes a suction control device, and when the suction control device is operated, the suction port provided at the tip of the insertion portion of the endoscope communicates with a suction source such as a suction pump. As a result, the aspirated substance such as body fluid in the body cavity is sucked from the suction port and discharged to the outside of the body cavity.
  • the suction control device described in Patent Document 1 is provided in the operation unit of the endoscope, and the suction pipe line of the endoscope has a suction channel reaching the suction port from the suction control device and suction from the suction control device. It consists of a suction tube that reaches the pump.
  • the suction control device includes a cylinder that connects the suction channel and the suction tube, a valve provided inside the cylinder, an operation member that is movable back and forth in the axial direction of the cylinder between a suction position and a non-suction position, and a cylinder. Is urged toward the non-suction position, and a leak hole is formed in the cover.
  • the valve When the operating member is in the non-suction position, the valve is closed and the communication between the suction channel and the suction tube is cut off.
  • the leak hole is open and the suction tube is open to the atmosphere.
  • the leak hole is closed and the valve is opened when the operating member is moved to the suction position.
  • the suction channel and the suction tube communicate with each other, and a suction force is generated at the suction port.
  • the leak hole is gradually closed and the valve is gradually opened in the process of moving the operation member from the non-suction position to the suction position. Therefore, before the valve is fully opened, a suction force is generated in the suction port to the extent that it is possible to aspirate a suctioned substance such as body fluid in the body cavity. There is a risk that the pipeline will be blocked.
  • the present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to provide a suction control device and an endoscope capable of suppressing clogging of a suction conduit.
  • An endoscope suction control device includes a housing, a first movable body that is movably accommodated in an accommodation hole formed in the housing, and a movable body that is movable to the first movable body.
  • the second movable body is supported, a first urging member that urges the first movable body, and a second urging member that urges the second movable body, the first movable body Is a first connection hole that communicates with the suction source, a second connection hole that communicates with the first connection hole and that communicates with the suction port of the endoscope, and a second connection hole that communicates with the first connection hole.
  • the first movable body has a suction position for communicating the suction port of the endoscope with the second connection hole, and the suction port of the endoscope and the second connection hole. Is accommodated in the accommodating hole so as to be movable between a non-suction position for disconnecting communication with and, and is urged from the suction position toward the non-suction position by the first urging member.
  • the movable body is movably supported by the first movable body between an open position for opening the vent hole to the atmosphere and a closed position for closing the vent hole, and the closed position by the second biasing member.
  • the second movable body When the first movable body is disposed in the non-suction position, the second movable body is disposed in the open position and the first movable body is urged toward the open position. When the body is placed in the suction position, the second movable body can be placed in the open position or the closed position or an intermediate position between the open position and the closed position.
  • the endoscope of one embodiment of the present invention includes the suction control device in the operation unit.
  • FIG. 1 It is a perspective view of an example of an endoscope for explaining the embodiment of the present invention.
  • FIG. It is a schematic diagram of an example of an endoscope system including the endoscope of FIG. It is sectional drawing of the suction control apparatus of the endoscope of FIG. It is sectional drawing of the modification of the suction control apparatus of FIG.
  • FIG. It is a schematic diagram which shows operation
  • FIG. It is a schematic diagram which shows operation
  • FIG. It is a schematic diagram which shows operation
  • FIG. 1 shows an example of an endoscope for explaining an embodiment of the present invention
  • FIG. 2 shows an example of an endoscope system including the endoscope of FIG.
  • the endoscope system 1 includes an endoscope 2, a light source device 3, a processor unit 4, and a suction pump 5 that is a suction source.
  • the endoscope 2 is a flexible endoscope and has an insertion section 10 to be inserted into a subject, an operation section 11 connected to the insertion section 10, and a universal cord 12 extending from the operation section 11. Is provided with a connector 13 connected to the light source device 3.
  • the insertion section 10 is composed of a tip section 14, a bending section 15 connected to the tip section 14, and a flexible section 16 connecting the bending section 15 and the operating section 11.
  • An image pickup unit 17 including an image pickup device such as a CCD (Charge Coupled Device) image sensor or a CMOS (Complementary Metal Oxide Semiconductor) image sensor is mounted on the tip portion 14.
  • an ultrasonic transducer for transmitting and receiving ultrasonic waves is mounted on the distal end portion 14 instead of the image pickup unit 17 or in addition to the image pickup unit 17.
  • the bending section 15 is configured to be bendable, and the bending of the bending section 15 is operated by the operation unit 11.
  • the flexible portion 16 is configured to be flexible enough to be deformed according to the shape of the insertion path in the subject.
  • the operation section 11 is provided with an operation knob 18 for operating the bending of the bending section 15 and an operation button 19 for operating imaging using the imaging section 17. Further, the operation section 11 is provided with an inlet portion 24 of the treatment instrument insertion channel 23 through which the treatment instrument is inserted.
  • a plurality of operation wires 22 and a treatment tool insertion channel 23 are provided inside the insertion section 10 and the operation section 11.
  • the operation wire 22 reaches the distal end portion 14 of the insertion portion 10 from the operation portion 11 and is pushed out toward the distal end portion 14 side or pulled toward the operation portion 11 side according to the operation of the operation knob 18.
  • the bending portion 15 of the insertion portion 10 is bent according to the push and pull of the operation wire 22.
  • the treatment instrument insertion channel 23 extends from an inlet portion 24 provided in the operation portion 11 to the distal end portion 14 of the insertion portion 10, and an outlet portion 25 of the treatment instrument insertion channel 23 is opened at the distal end surface of the distal end portion 14. ing.
  • a light guide 20 and an electric cable 21 are provided inside the insertion section 10, the operation section 11, and the universal cord 12.
  • the light guide 20 guides the illumination light generated by the light source device 3 to the tip portion 14.
  • the electric cable 21 transmits the operating power of the imaging unit 17, the control signal, and the captured image signal between the imaging unit 17 and the processor unit 4.
  • the processor unit 4 generates captured image data from the input captured image signal, displays the generated captured image data on the monitor 6, and records it.
  • a suction conduit 30 is provided inside the insertion section 10, the operation section 11, and the universal cord 12.
  • the suction conduit 30 is composed of a suction source-side conduit 31 extending from the operation unit 11 to the connector 13 via the universal cord 12, and a suction port-side conduit 32 extending from the operation unit 11 to the distal end portion 14 of the insertion unit 10.
  • the suction source side pipe line 31 communicates with the suction pump 5 via a connection tube 33 connected to the base 26 of the connector 13.
  • the suction port side conduit 32 merges with the treatment instrument insertion channel 23 in the operation unit 11, and the suction port side conduit 32 merged with the treatment instrument insertion channel 23 communicates with the outlet portion 25 of the treatment instrument insertion channel 23. ing.
  • the opening of the outlet portion 25 of the treatment instrument insertion channel 23 also functions as the suction port 34, and suctioned substances such as body fluid are sucked from the suction port 34.
  • a forceps plug 27 having an opening/closing valve is attached to the opening of the inlet portion 24 of the treatment instrument insertion channel 23, and the opening of the inlet portion 24 is closed by the forceps stopper 27 during suction. As a result, the internal pressures of the treatment instrument insertion channel 23 and the suction conduit 30 are kept negative.
  • the operation unit 11 is provided with a suction control device 100 that controls suction, and the suction control device 100 is interposed between the suction source side conduit 31 and the suction port side conduit 32.
  • the suction control device 100 has an operation button 101, and connects the suction source side conduit 31 and the suction port side conduit 32 to each other in accordance with the operation of the operation button 101.
  • the suction source side conduit 31 and the suction port side conduit 32 communicate with each other, so that a suctioned object such as body fluid is sucked from the suction port 34.
  • FIG. 3 shows the suction control device 100.
  • the suction control device 100 includes a housing 102, a first movable body 104 movably accommodated in an accommodation hole 103 formed in the housing 102, and a second movable body 104 movably supported by the first movable body 104.
  • the movable body 105, a first biasing member 106 that biases the first movable body 104, and a second biasing member 107 that biases the second movable body 105 are provided.
  • the operation button 101 of the suction control device 100 includes a first movable body 104 and a second movable body 105.
  • the housing 102 is formed integrally with the casing of the operation unit 11 of the endoscope 2 or is assembled to the casing of the operation unit 11.
  • the housing 102 has a cylindrical accommodation hole 103, a suction source side connection hole 108 to which the suction source side conduit 31 is connected, and a suction port side connection hole 109 to which the suction port side conduit 32 is connected.
  • the suction source side connection hole 108 is opened on the bottom surface of the accommodation hole 103, and the suction port side connection hole 109 is opened on the inner peripheral surface of the accommodation hole 103.
  • the first movable body 104 is formed in a cylindrical shape, and is fitted into the accommodation hole 103 so as to be movable in the axial direction of the accommodation hole 103.
  • the first biasing member 106 is sandwiched between the bottom surface of the accommodation hole 103 and the base end surface of the first movable body 104 facing the bottom surface of the accommodation hole 103.
  • the first biasing member 106 is an elastic body such as a coil spring or rubber.
  • the housing 102 and the first movable body 104 are provided with appropriate engaging portions (not shown) that prevent the first movable body 104 from coming off.
  • the first movable body 104 is movable between a non-suction position where it is prevented from coming off by the engagement portion and a suction position which is pushed from this non-suction position to the bottom surface side of the accommodation hole 103.
  • the biasing member 106 biases the suction position toward the non-suction position.
  • FIG. 3 shows a state in which the first movable body 104 is arranged at the non-suction position. Note that, as shown in FIG. 4, the first biasing member 106 may be disposed outside the accommodation hole 103 and sandwiched between the housing 102 and the first movable body 104.
  • the lower portion 110 on the proximal end side of the first movable body 104 is accommodated in the accommodation hole 103 while the first movable body 104 is arranged at the non-suction position.
  • the upper portion 111 on the tip side of the first movable body 104 projects from the accommodation hole 103.
  • the intermediate portion 112 between the lower portion 110 and the upper portion 111 projects from the accommodation hole 103 in a state where the first movable body 104 is arranged at the non-suction position, and the first movable body 104 is arranged at the suction position. In the state where it is present, it is accommodated in the accommodation hole 103.
  • the first movable body 104 has a first connection hole 113, a second connection hole 114, and a ventilation hole 115.
  • the first connection hole 113 extends in the axial direction of the first movable body 104 from the lower portion 110 of the first movable body 104 to the upper portion 111, and opens at the base end surface of the first movable body 104.
  • the first connection hole 113 opened on the base end surface of the first movable body 104 communicates with the suction pump 5 via the suction source side conduit 31.
  • the second connection hole 114 extends in the radial direction of the first movable body 104 at the intermediate portion 112 of the first movable body 104, and at least one end of the second connection hole 114 is opened to the outer peripheral surface of the intermediate portion 112. There is.
  • the second connection hole 114 intersects the first connection hole 113 and communicates with the first connection hole 113.
  • the ventilation hole 115 extends in the radial direction of the first movable body 104 in the upper portion 111 of the first movable body 104, and at least one end of the ventilation hole 115 is open to the outer peripheral surface of the upper portion 111.
  • the ventilation hole 115 intersects with the first connection hole 113 and communicates with the first connection hole 113.
  • the second movable body 105 is formed in a cylindrical cap shape, and is fitted to the upper portion 111 of the first movable body 104 so as to be movable in the axial direction of the first movable body 104.
  • the second biasing member 107 is sandwiched between the tip surface of the first movable body 104 and the top surface of the second movable body 105 that faces the tip surface of the first movable body 104.
  • the second biasing member 107 is an elastic body such as a coil spring or rubber.
  • the first movable body 104 and the second movable body 105 are provided with appropriate engaging portions (not shown) that prevent the second movable body 105 from coming off.
  • the second movable body 105 is movable between an open position in which the engagement portion prevents the second movable body 105 from coming off and a closed position in which the second movable body 105 is pushed into the front end surface side of the first movable body 104 from the open position.
  • the urging member 107 urges the closed position from the closed position.
  • FIG. 3 shows a state in which the second movable body 105 is arranged in the open position.
  • the moving direction of the first movable body 104 from the non-suction position to the suction position and the moving direction of the second movable body 105 from the open position to the closed position are the same direction, and the second biasing member 107. Is set to be larger than the urging force of the first urging member 106. In other words, assuming that both the first biasing member 106 and the second biasing member 107 are coil springs, the spring constant of the second biasing member 107 is greater than the spring constant of the first biasing member 106. It is set large.
  • 5 to 8 show the operation of the suction control device 100.
  • the first movable body 104 and the second movable body 105 are not operated, the first movable body 104 is arranged in the non-suction position, and the second movable body 105 is arranged in the open position. ..
  • the suction port side connection hole 109 is closed by the lower portion 110 of the first movable body 104.
  • the second connection hole 114 provided in the intermediate portion 112 of the first movable body 104 and the ventilation hole 115 provided in the upper portion 111 are both open to the atmosphere.
  • the outside air is simply sucked into the suction source side conduit 31 through the second connection hole 114 and the ventilation hole 115, the suction port side conduit 32 is not decompressed, and the suction force may be generated in the suction port 34. Absent. Therefore, it is possible to prevent the air and the body fluid in the body from leaking from the outlet portion 25 at the tip of the endoscope.
  • FIGS. 6 to 8 show a case where the first movable body 104 and the second movable body 105 are operated.
  • the first movable body 104 and the second movable body 105 are pushed into the bottom surface side of the accommodation hole 103.
  • the biasing force of the second biasing member 107 that biases the second movable body 105 is set to be larger than the biasing force of the first biasing member 106 that biases the first movable body 104. Therefore, first, as shown in FIG. 6, the first movable body 104 is moved from the non-suction position to the suction position. Next, as shown in FIGS. 7 and 8, the second movable body 105 is moved from the open position to the closed position.
  • the intermediate portion 112 of the first movable body 104 is accommodated in the accommodation hole 103 while the first movable body 104 is moved to the suction position. All of the second connection holes 114 provided in the intermediate portion 112 overlap with the suction port side connection holes 109, and the suction port side conduit 32 is sucked through the first connection holes 113 and the second connection holes 114. It communicates with the source side conduit 31.
  • the upper portion 111 of the first movable body 104 projects from the accommodation hole 103, the second movable body 105 is arranged in the open position, and the ventilation hole 115 provided in the upper portion 111 is still open to the atmosphere. Has been done.
  • the suction port side conduit 32 is decompressed to some extent and a slight suction force is generated in the suction port 34, the outside air is mainly sucked into the suction source side conduit 31 through the ventilation hole 115. Further, when the body fluid flows back in this state, the body fluid is sucked into the suction source side conduit 31 and is not scattered to the operator.
  • the ventilation hole 115 provided in the upper portion 111 of the first movable body 104 is moved by the second movable body 105. Gradually closed. With the reduction of the ventilation holes 115, the flow rate of the outside air sucked into the suction source side conduit 31 through the ventilation holes 115 decreases. As the flow rate of the outside air flowing through the ventilation hole 115 decreases, the amount of decrease in the pressure of the suction port side conduit 32 increases, and the suction force generated in the suction port 34 increases.
  • FIG. 9 shows changes in the suction force generated at the suction port 34 in the operation of the suction control device 100 shown in FIGS. 5 to 8.
  • the horizontal axis is the position of the second movable body 105 when the first movable body 104 is arranged in the non-suction position and the second movable body 105 is arranged in the open position, and the second movable body with respect to the housing 102 is the origin.
  • the displacement amount D of 105 The vertical axis represents the suction force P at the suction port 34.
  • the suction force P is the difference between the atmospheric pressure and the internal pressure of the suction port 34.
  • the displacement amount D1 is the displacement amount of the second movable body 105 when the first movable body 104 is moved to the suction position (see FIG. 6).
  • the amount of displacement see FIG. 7
  • the displacement amount D3 is the displacement amount of the second movable body 105 when the first movable body 104 is moved to the suction position and the second movable body 105 is further moved to the closed position (see FIG. 8). ).
  • the suction force P becomes the maximum value P3.
  • the suction force P1 at the displacement amount D1 is extremely small with respect to the maximum value P3 of the suction force P, and is insufficient for sucking a suctioned object such as body fluid from the suction port 34.
  • the suction force required to suck a suctioned object such as body fluid from the suction port 34 is the suction force P2 at the displacement amount D2, for example, at the displacement amount D1, all of the second connection holes 114 are connected to the suction port side. It overlaps with the hole 109, and the connection portion between the second connection hole 114 and the suction port side connection hole 109 is completely opened.
  • FIG. 10 shows a modification of the suction control device 100.
  • the ventilation hole 115 provided in the upper portion 111 of the first movable body 104 extends in the radial direction of the first movable body 104, and one end of the ventilation hole 115 is opened to the outer peripheral surface of the upper portion 111. doing. Then, the second movable body 105 covers the upper portion 111 so as to be movable in the radial direction of the first movable body 104 parallel to the ventilation hole 115.
  • the second movable body 105 has an open position where an appropriate gap is provided between the outer peripheral surface of the upper portion 111 and the inner peripheral surface of the second movable body 105 on the opening side of the ventilation hole 115, and the outer peripheral surface of the upper portion 111 and the first movable body 105.
  • the second movable member 105 is movable between a closed position in which the inner peripheral surface of the movable body 105 and the movable member 105 are in close contact with each other, and is urged by the second urging member 107 from the closed position to the open position.
  • FIG. 10 shows a state in which the second movable body 105 is arranged in the open position.
  • the suction port side conduit 32 is connected to the first connection hole 113. And the suction source side conduit 31 through the second connection hole 114.
  • the upper portion 111 of the first movable body 104 projects from the accommodation hole 103, the second movable body 105 is arranged in the open position, and the ventilation hole 115 provided in the upper portion 111 is still open to the atmosphere. To be done. Therefore, although the suction port side conduit 32 is decompressed to some extent and a slight suction force is generated in the suction port 34, the outside air is mainly sucked into the suction source side conduit 31 through the ventilation hole 115.
  • the second movable body 105 When the second movable body 105 is moved toward the closed position while the first movable body 104 is arranged at the suction position, the outer peripheral surface of the upper portion 111 of the first movable body 104 on the opening side of the ventilation hole 115. And the gap between the inner peripheral surface of the second movable body 105 is gradually narrowed. With the reduction of the gap communicating with the ventilation hole 115, the flow rate of the outside air sucked into the suction source side conduit 31 through the ventilation hole 115 decreases. As the flow rate of the outside air flowing through the ventilation hole 115 decreases, the amount of decrease in the pressure of the suction port side conduit 32 increases, and the suction force generated in the suction port 34 increases.
  • the entire second connection hole 114 overlaps the suction port side connection hole 109, and the connection portion between the second connection hole 114 and the suction port side connection hole 109 is completely opened. There is. As a result, the suctioned substance is suppressed from being caught in the connection portion between the second connection hole 114 and the suction port side connection hole 109, and the clogging of the suction pipeline 30 is suppressed.
  • the moving direction of the first movable body 104 from the non-suction position to the suction position and the moving direction of the second movable body 105 from the open position to the closed position intersect, and The movement toward the suction position and the movement toward the closed position of the second movable body 105 are independent of each other. Therefore, the urging force of the second urging member 107 can be set to be equal to or less than the urging force of the first urging member 106, and the operation force required to move the second movable body 105 can be reduced.
  • FIG. 11 shows another example of the suction control device of the endoscope for explaining the embodiment of the present invention.
  • the endoscope including the suction control device shown in FIG. 11 is basically the same as the endoscope 2 shown in FIGS. 1 and 2, but the suction source side conduit 31 is built in the endoscope. It has not been. However, it can be implemented even when the suction source side conduit 31 is built in.
  • the suction control device 200 includes a housing 202, a first movable body 204 movably accommodated in an accommodation hole 203 formed in the housing 202, and a second movable body 204 movably supported by the first movable body 204.
  • the movable body 205, a first biasing member 206 that biases the first movable body 204, and a second biasing member 207 that biases the second movable body 205 are provided.
  • the housing 202 has a cylindrical accommodation hole 203 and a suction port side connection hole 209 to which the suction port side conduit 32 is connected.
  • the suction port side connection hole 209 is opened on the peripheral surface of the accommodation hole 103.
  • the first movable body 204 is formed in a cylindrical shape, and is fitted into the accommodation hole 203 so as to be movable in the axial direction of the accommodation hole 203.
  • the first biasing member 206 is sandwiched between the bottom surface of the accommodation hole 203 and the base end surface of the first movable body 204 facing the bottom surface of the accommodation hole 203.
  • the housing 202 and the first movable body 204 are provided with appropriate engaging portions (not shown) that prevent the first movable body 204 from coming off.
  • the first movable body 204 is movable between a non-suction position where it is prevented from coming off by the engaging portion and a suction position which is pushed from this non-suction position to the bottom surface side of the accommodation hole 203.
  • the biasing member 206 biases the suction position toward the non-suction position.
  • FIG. 11 shows a state in which the first movable body 204 is arranged at the non-suction position. Note that, like the suction control device 100 shown in FIG. 4, the first urging member 206 may be arranged outside the accommodation hole 203 and sandwiched between the housing 202 and the first movable body 204.
  • the lower portion 210 on the proximal end side of the first movable body 204 is accommodated in the accommodation hole 203 while the first movable body 204 is arranged at the non-suction position.
  • the upper portion 211 on the tip side of the first movable body 204 projects from the accommodation hole 203.
  • the intermediate portion 212 between the lower portion 210 and the upper portion 211 projects from the accommodation hole 203 in a state where the first movable body 204 is arranged at the non-suction position, and the first movable body 204 is arranged at the suction position. In the state where it is present, it is accommodated in the accommodation hole 203.
  • the first movable body 204 has a suction source side connection hole 208 to which the suction tube 33 is connected, a first connection hole 213, a second connection hole 214, and a ventilation hole 215.
  • the suction source side connection hole 208 is provided in the upper portion 211 of the first movable body 204, and is directly connected to the suction pump 5 via the suction tube 33.
  • the first connection hole 213 extends in the radial direction of the first movable body 104 from the suction source side connection hole 208 in the upper portion 211 of the first movable body 204.
  • the first connection hole 213 communicates with the suction pump 5 via the suction tube 33.
  • the second connection hole 214 extends in the radial direction of the first movable body 204 in the intermediate portion 212 of the first movable body 204, and at least one end of the second connection hole 214 is opened to the outer peripheral surface of the intermediate portion 212. There is.
  • the second connection hole 214 communicates with the first connection hole 213 via a connection hole 216 extending in the axial direction of the first movable body 104.
  • the ventilation hole 215 extends in the radial direction of the first movable body 204 in the upper portion 211 of the first movable body 204, and one end of the ventilation hole 215 opens to the outer peripheral surface of the upper portion 211.
  • the ventilation hole 215 intersects with the first connection hole 213 and communicates with the first connection hole 213.
  • the second movable body 205 is formed in a cylindrical cap shape, and is fitted to the upper portion 211 of the first movable body 204 so as to be movable in the axial direction of the first movable body 204.
  • the second biasing member 207 is sandwiched between the tip surface of the first movable body 204 and the top surface of the second movable body 205 that faces the tip surface of the first movable body 204.
  • the first movable body 204 and the second movable body 205 are provided with appropriate engaging portions (not shown) that prevent the second movable body 205 from coming off.
  • the second movable body 205 is movable between an open position where the engagement portion prevents the second movable body 205 from coming off, and a closed position in which the second movable body 205 is pushed toward the front end surface side of the first movable body 204 from the open position.
  • the urging member 207 urges the closed position from the closed position.
  • FIG. 11 shows a state in which the second movable body 205 is arranged in the open position.
  • the moving direction of the first movable body 204 from the non-suction position to the suction position and the moving direction of the second movable body 205 from the open position to the closed position are the same direction, and the second biasing member 207. Is set to be larger than the urging force of the first urging member 206.
  • the first movable body 204 and the second movable body 205 are not operated, the first movable body 204 is arranged in the non-suction position, and the second movable body 205 is arranged in the open position. ..
  • the suction port side connection hole 209 to which the suction port side conduit 32 is connected is closed by the lower portion 210 of the first movable body 204.
  • the second connection hole 214 provided in the intermediate portion 212 of the first movable body 204 and the ventilation hole 215 provided in the upper portion 211 are both open to the atmosphere. In this case, the outside air is simply sucked into the suction tube 33 through the second connection hole 214 and the ventilation hole 215, the suction port side conduit 32 is not depressurized, and the suction force is not generated in the suction port 34.
  • FIG. 13 to 15 show a case where the first movable body 204 and the second movable body 205 are operated.
  • the first movable body 204 and the second movable body 205 are pushed into the bottom surface side of the accommodation hole 203.
  • the biasing force of the second biasing member 207 that biases the second movable body 205 is set to be larger than the biasing force of the first biasing member 206 that biases the first movable body 204. Therefore, first, as shown in FIG. 13, the first movable body 204 is moved from the non-suction position to the suction position. Next, as shown in FIGS. 14 and 15, the second movable body 205 is moved from the open position to the closed position.
  • the intermediate portion 212 of the first movable body 204 is accommodated in the accommodation hole 203 in a state where the first movable body 204 is moved to the suction position. All of the second connection holes 214 provided in the intermediate portion 212 overlap the suction port side connection holes 209, and the suction port side conduit 32 is sucked through the first connection holes 213 and the second connection holes 214. It communicates with the tube 33.
  • the upper part 211 of the first movable body 204 projects from the accommodation hole 203, the second movable body 205 is arranged in the open position, and the ventilation hole 215 provided in the upper part 211 is still open to the atmosphere. Has been done. Therefore, although the suction port side conduit 32 is decompressed to some extent and a slight suction force is generated in the suction port 34, mainly the outside air is sucked into the suction tube 33 through the ventilation hole 215.
  • the ventilation hole 215 provided in the upper portion 211 of the first movable body 204 is moved by the second movable body 205. Gradually closed. With the reduction of the ventilation hole 215, the flow rate of the outside air sucked into the suction tube 33 through the ventilation hole 215 decreases. As the flow rate of the outside air flowing through the ventilation hole 215 decreases, the amount of decrease in the pressure of the suction port side conduit 32 increases, and the suction force generated in the suction port 34 increases.
  • the entire second connection hole 214 overlaps the suction port side connection hole 209, and the connection portion between the second connection hole 214 and the suction port side connection hole 209 is completely opened. Therefore, it is possible to prevent the suctioned substance from being caught at the connection portion between the second connection hole 214 and the suction port side connection hole 209, and to prevent the suction pipe line 30 from being clogged.
  • the second movable body 105 may cover the upper portion 211 of the first movable body 204 so as to be movable in the radial direction of the first movable body 204 parallel to the ventilation hole 215.
  • the moving direction of the first movable body 204 from the non-suction position to the suction position and the moving direction of the second movable body 205 from the open position to the closed position intersect with each other to reach the suction position of the first movable body 104.
  • the movement toward the second movable body 105 and the movement toward the closed position of the second movable body 105 are independent of each other. Therefore, the urging force of the second urging member 207 can be set to be equal to or less than the urging force of the first urging member 206, and the operation force required to move the second movable body 205 can be reduced.
  • the suction control device for an endoscope disclosed in the present specification includes a housing, a first movable body movably housed in a housing hole formed in the housing, and the first movable body.
  • a second movable body movably supported by the movable body, a first urging member that urges the first movable body, and a second urging member that urges the second movable body.
  • the first movable body has a first connection hole that communicates with a suction source, a second connection hole that communicates with the first connection hole and that communicates with a suction port of an endoscope, A ventilation hole communicating with the connection hole, wherein the first movable body has a suction position at which the suction port of the endoscope communicates with the second connection hole, and a suction port of the endoscope.
  • the second movable body is movably supported by the first movable body between an open position for opening the vent hole to the atmosphere and a closed position for closing the vent hole.
  • the first movable body is urged from the closed position to the open position by the biasing member and the first movable body is arranged in the non-suction position, the second movable body is arranged in the open position.
  • the second movable body can be arranged at the open position, the closed position, or an intermediate position between the open position and the closed position. is there.
  • the moving direction of the first movable body from the non-suction position to the suction position and the second movement from the open position to the closed position is the same direction, and the urging force of the second urging member is larger than the urging force of the first urging member.
  • the moving direction of the movable body intersects.
  • the first movable body is pushed into the accommodation hole to move from the non-suction position to the suction position, and at the non-suction position.
  • the housing has a suction port side connection hole communicating with the suction port, and the suction port side connection hole is arranged at the non-suction position on the inner peripheral surface of the accommodation hole.
  • the first movable body is opened in a region facing the intermediate portion of the first movable body arranged at the lower portion and the suction position, and the second connection hole is provided in the intermediate portion.
  • the vent hole is provided in the upper portion.
  • the endoscope disclosed in the present specification includes the suction control device in the operation unit.

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Abstract

Provided are a suction control device and an endoscope capable of suppressing the clogging of a suction conduit. A first movable body (104) has a first connection hole (113) communicating with a suction source (5), a second connection hole (114) communicating with a suction port (34) of an endoscope (2), and a ventilation hole (115). The first movable body (104) is stored in a storage hole (103) of a housing (102) so as to be movable between a suction position enabling communication between the suction port (34) and the second connection hole (114), and a non-suction position. A second movable body (105) is supported by the first movable body (104) so as to be movable between an open position at which the ventilation hole (115) opens to the atmosphere, and a closed position. When the first movable body (104) is disposed in the non-suction position, the second movable body (105) is disposed in the open position, and when the first movable body (104) is disposed in the suction position, the second movable body (105) can be disposed in the open position or the closed position.

Description

内視鏡の吸引制御装置及び内視鏡Suction control device for endoscope and endoscope
　本発明は、内視鏡の吸引制御装置及び内視鏡に関する。 The present invention relates to an endoscope suction control device and an endoscope.
　一般に、内視鏡は吸引制御装置を備え、吸引制御装置が操作されることにより、内視鏡の挿入部の先端部に設けられている吸引口が吸引ポンプ等の吸引源に連通される。これにより、体腔内の体液等の吸引物が、吸引口から吸引され、体腔外に排出される。 Generally, an endoscope includes a suction control device, and when the suction control device is operated, the suction port provided at the tip of the insertion portion of the endoscope communicates with a suction source such as a suction pump. As a result, the aspirated substance such as body fluid in the body cavity is sucked from the suction port and discharged to the outside of the body cavity.
　特許文献１に記載された吸引制御装置は、内視鏡の操作部に設けられており、内視鏡の吸引管路は、吸引制御装置から吸引口に達する吸引チャンネルと、吸引制御装置から吸引ポンプに達する吸引チューブとによって構成されている。吸引制御装置は、吸引チャンネルと吸引チューブとを連通させるシリンダと、シリンダの内部に設けられた弁と、吸引位置と非吸引位置との間でシリンダの軸方向に進退自在な操作部材と、シリンダを非吸引位置に向けて付勢するカバーとを備え、カバーには、リーク孔が形成されている。 The suction control device described in Patent Document 1 is provided in the operation unit of the endoscope, and the suction pipe line of the endoscope has a suction channel reaching the suction port from the suction control device and suction from the suction control device. It consists of a suction tube that reaches the pump. The suction control device includes a cylinder that connects the suction channel and the suction tube, a valve provided inside the cylinder, an operation member that is movable back and forth in the axial direction of the cylinder between a suction position and a non-suction position, and a cylinder. Is urged toward the non-suction position, and a leak hole is formed in the cover.
　操作部材が非吸引位置にある場合に、弁は閉じており、吸引チャンネルと吸引チューブとの連通は切断されている。そして、リーク孔は開いており、吸引チューブは大気に開放されている。操作部材が吸引位置に移動された場合に、リーク孔は閉じられ、弁は開かれる。これにより、吸引チャンネルと吸引チューブとが連通し、吸引力が吸引口に生じる。 When the operating member is in the non-suction position, the valve is closed and the communication between the suction channel and the suction tube is cut off. The leak hole is open and the suction tube is open to the atmosphere. The leak hole is closed and the valve is opened when the operating member is moved to the suction position. As a result, the suction channel and the suction tube communicate with each other, and a suction force is generated at the suction port.
日本国特許第３１８７１０２号公報Japanese Patent No. 3187102
　特許文献１に記載された吸引制御装置では、操作部材が非吸引位置から吸引位置に移動される過程において、リーク孔は次第に閉じられ、逆に、弁は次第に開かれる。このため、弁が全開状態に至る以前に、体腔内の体液等の吸引物を吸引可能な程度の吸引力が吸引口に生じてしまい、吸引された吸引物が半開状態の弁に引っ掛かり、吸引管路が詰まる虞がある。 In the suction control device described in Patent Document 1, the leak hole is gradually closed and the valve is gradually opened in the process of moving the operation member from the non-suction position to the suction position. Therefore, before the valve is fully opened, a suction force is generated in the suction port to the extent that it is possible to aspirate a suctioned substance such as body fluid in the body cavity. There is a risk that the pipeline will be blocked.
　本発明は、上述した事情に鑑みなされたものであり、吸引管路の詰まりを抑制可能な吸引制御装置及び内視鏡を提供することを目的とする。 The present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to provide a suction control device and an endoscope capable of suppressing clogging of a suction conduit.
　本発明の一態様の内視鏡の吸引制御装置は、ハウジングと、上記ハウジングに形成されている収容孔に移動可能に収容されている第１可動体と、上記第１可動体に移動可能に支持されている第２可動体と、上記第１可動体を付勢する第１付勢部材と、上記第２可動体を付勢する第２付勢部材と、を備え、上記第１可動体は、吸引源に連通される第１接続孔と、上記第１接続孔に連通しており且つ内視鏡の吸引口に連通される第２接続孔と、上記第１接続孔に連通している通気孔と、を有し、上記第１可動体は、上記内視鏡の吸引口と上記第２接続孔とを連通させる吸引位置と、上記内視鏡の吸引口と上記第２接続孔との連通を切断する非吸引位置との間で移動可能に上記収容孔に収容され、上記第１付勢部材によって上記吸引位置から上記非吸引位置に向けて付勢されており、上記第２可動体は、上記通気孔を大気に開放する開放位置と、上記通気孔を閉塞する閉塞位置との間で移動可能に上記第１可動体に支持され、上記第２付勢部材によって上記閉塞位置から上記開放位置に向けて付勢されており、上記第１可動体が上記非吸引位置に配置されている場合に、上記第２可動体は上記開放位置に配置されており、上記第１可動体が上記吸引位置に配置されている場合に、上記第２可動体は上記開放位置若しくは上記閉塞位置又は上記開放位置と上記閉塞位置との間の中間位置に配置可能である。 An endoscope suction control device according to an aspect of the present invention includes a housing, a first movable body that is movably accommodated in an accommodation hole formed in the housing, and a movable body that is movable to the first movable body. The second movable body is supported, a first urging member that urges the first movable body, and a second urging member that urges the second movable body, the first movable body Is a first connection hole that communicates with the suction source, a second connection hole that communicates with the first connection hole and that communicates with the suction port of the endoscope, and a second connection hole that communicates with the first connection hole. The first movable body has a suction position for communicating the suction port of the endoscope with the second connection hole, and the suction port of the endoscope and the second connection hole. Is accommodated in the accommodating hole so as to be movable between a non-suction position for disconnecting communication with and, and is urged from the suction position toward the non-suction position by the first urging member. The movable body is movably supported by the first movable body between an open position for opening the vent hole to the atmosphere and a closed position for closing the vent hole, and the closed position by the second biasing member. When the first movable body is disposed in the non-suction position, the second movable body is disposed in the open position and the first movable body is urged toward the open position. When the body is placed in the suction position, the second movable body can be placed in the open position or the closed position or an intermediate position between the open position and the closed position.
　また、本発明の一態様の内視鏡は、上記吸引制御装置を操作部に備える。 In addition, the endoscope of one embodiment of the present invention includes the suction control device in the operation unit.
　本発明によれば、吸引管路の詰まりを抑制可能な吸引制御装置及び内視鏡を提供することができる。 According to the present invention, it is possible to provide a suction control device and an endoscope capable of suppressing clogging of the suction conduit.
本発明の実施形態を説明するための、内視鏡の一例の斜視図である。It is a perspective view of an example of an endoscope for explaining the embodiment of the present invention. 図１の内視鏡を含む内視鏡システムの一例の模式図である。It is a schematic diagram of an example of an endoscope system including the endoscope of FIG. 図１の内視鏡の吸引制御装置の断面図である。It is sectional drawing of the suction control apparatus of the endoscope of FIG. 図３の吸引制御装置の変形例の断面図である。It is sectional drawing of the modification of the suction control apparatus of FIG. 図３の吸引制御装置の動作を示す模式図である。It is a schematic diagram which shows operation|movement of the suction control apparatus of FIG. 図３の吸引制御装置の動作を示す模式図である。It is a schematic diagram which shows operation|movement of the suction control apparatus of FIG. 図３の吸引制御装置の動作を示す模式図である。It is a schematic diagram which shows operation|movement of the suction control apparatus of FIG. 図３の吸引制御装置の動作を示す模式図である。It is a schematic diagram which shows operation|movement of the suction control apparatus of FIG. 図５から図８の吸引制御装置の動作における吸引力の変化を示すグラフである。It is a graph which shows the change of the suction force in operation|movement of the suction control apparatus of FIGS. 図３の吸引制御装置の他の変形例の断面図である。It is sectional drawing of the other modification of the suction control apparatus of FIG. 本発明の実施形態を説明するための、内視鏡の吸引制御装置の他の例の断面図である。It is sectional drawing of the other example of the suction control apparatus of an endoscope for describing embodiment of this invention. 図１１の吸引制御装置の動作を示す模式図である。It is a schematic diagram which shows operation|movement of the suction control apparatus of FIG. 図１１の吸引制御装置の動作を示す模式図である。It is a schematic diagram which shows operation|movement of the suction control apparatus of FIG. 図１１の吸引制御装置の動作を示す模式図である。It is a schematic diagram which shows operation|movement of the suction control apparatus of FIG. 図１１の吸引制御装置の動作を示す模式図である。It is a schematic diagram which shows operation|movement of the suction control apparatus of FIG. 図１１の吸引制御装置の変形例の断面図である。It is sectional drawing of the modification of the suction control apparatus of FIG.
　図１は、本発明の実施形態を説明するための、内視鏡の一例を示し、図２は、図１の内視鏡を含む内視鏡システムの一例を示す。 FIG. 1 shows an example of an endoscope for explaining an embodiment of the present invention, and FIG. 2 shows an example of an endoscope system including the endoscope of FIG.
　内視鏡システム１は、内視鏡２と、光源装置３と、プロセッサユニット４と、吸引源である吸引ポンプ５とを備える。内視鏡２は軟性鏡であり、被検体内に挿入される挿入部１０と、挿入部１０に連なる操作部１１と、操作部１１から延びるユニバーサルコード１２とを有し、ユニバーサルコード１２の末端には、光源装置３に接続されるコネクタ１３が設けられている。 The endoscope system 1 includes an endoscope 2, a light source device 3, a processor unit 4, and a suction pump 5 that is a suction source. The endoscope 2 is a flexible endoscope and has an insertion section 10 to be inserted into a subject, an operation section 11 connected to the insertion section 10, and a universal cord 12 extending from the operation section 11. Is provided with a connector 13 connected to the light source device 3.
　挿入部１０は、先端部１４と、先端部１４に連なる湾曲部１５と、湾曲部１５と操作部１１とを接続している軟性部１６とで構成されている。先端部１４には、ＣＣＤ（Charge Coupled Device）イメージセンサ、ＣＭＯＳ（Complementary Metal Oxide Semiconductor）イメージセンサ等の撮像素子を含む撮像部１７が搭載されている。なお、内視鏡２が超音波内視鏡である場合に、先端部１４には、撮像部１７に替えて、又は撮像部１７に加えて超音波を発信及び受信する超音波振動子が搭載される。湾曲部１５は湾曲可能に構成されており、湾曲部１５の湾曲は操作部１１によって操作される。また、軟性部１６は、被検体内の挿入経路の形状に倣って変形可能な程に可撓に構成されている。 The insertion section 10 is composed of a tip section 14, a bending section 15 connected to the tip section 14, and a flexible section 16 connecting the bending section 15 and the operating section 11. An image pickup unit 17 including an image pickup device such as a CCD (Charge Coupled Device) image sensor or a CMOS (Complementary Metal Oxide Semiconductor) image sensor is mounted on the tip portion 14. When the endoscope 2 is an ultrasonic endoscope, an ultrasonic transducer for transmitting and receiving ultrasonic waves is mounted on the distal end portion 14 instead of the image pickup unit 17 or in addition to the image pickup unit 17. To be done. The bending section 15 is configured to be bendable, and the bending of the bending section 15 is operated by the operation unit 11. Further, the flexible portion 16 is configured to be flexible enough to be deformed according to the shape of the insertion path in the subject.
　操作部１１には、湾曲部１５の湾曲を操作する操作ノブ１８、撮像部１７を用いた撮像を操作する操作ボタン１９が設けられている。また、操作部１１には、処置具が挿通される処置具挿通チャンネル２３の入口部分２４が設けられている。 The operation section 11 is provided with an operation knob 18 for operating the bending of the bending section 15 and an operation button 19 for operating imaging using the imaging section 17. Further, the operation section 11 is provided with an inlet portion 24 of the treatment instrument insertion channel 23 through which the treatment instrument is inserted.
　挿入部１０及び操作部１１の内部には、複数の操作ワイヤ２２と、処置具挿通チャンネル２３とが設けられている。操作ワイヤ２２は、操作部１１から挿入部１０の先端部１４に達しており、操作ノブ１８の操作に応じて先端部１４側に押し出され、又は操作部１１側に引っ張られる。挿入部１０の湾曲部１５は、操作ワイヤ２２の押し引きに応じて湾曲される。処置具挿通チャンネル２３は、操作部１１に設けられている入口部分２４から挿入部１０の先端部１４まで延びており、処置具挿通チャンネル２３の出口部分２５は先端部１４の先端面に開口している。 A plurality of operation wires 22 and a treatment tool insertion channel 23 are provided inside the insertion section 10 and the operation section 11. The operation wire 22 reaches the distal end portion 14 of the insertion portion 10 from the operation portion 11 and is pushed out toward the distal end portion 14 side or pulled toward the operation portion 11 side according to the operation of the operation knob 18. The bending portion 15 of the insertion portion 10 is bent according to the push and pull of the operation wire 22. The treatment instrument insertion channel 23 extends from an inlet portion 24 provided in the operation portion 11 to the distal end portion 14 of the insertion portion 10, and an outlet portion 25 of the treatment instrument insertion channel 23 is opened at the distal end surface of the distal end portion 14. ing.
　挿入部１０及び操作部１１並びにユニバーサルコード１２の内部には、ライトガイド２０と、電気ケーブル２１とが設けられている。ライトガイド２０は、光源装置３によって生成される照明光を先端部１４に導く。電気ケーブル２１は、撮像部１７の動作電力、制御信号、及び撮影画像信号を、撮像部１７とプロセッサユニット４との間で伝送する。プロセッサユニット４は、入力された撮影画像信号から撮影画像データを生成し、生成した撮影画像データをモニタ６に表示させ、記録する。 A light guide 20 and an electric cable 21 are provided inside the insertion section 10, the operation section 11, and the universal cord 12. The light guide 20 guides the illumination light generated by the light source device 3 to the tip portion 14. The electric cable 21 transmits the operating power of the imaging unit 17, the control signal, and the captured image signal between the imaging unit 17 and the processor unit 4. The processor unit 4 generates captured image data from the input captured image signal, displays the generated captured image data on the monitor 6, and records it.
　また、挿入部１０及び操作部１１並びにユニバーサルコード１２の内部には、吸引管路３０が設けられている。吸引管路３０は、操作部１１からユニバーサルコード１２を経てコネクタ１３まで延びる吸引源側管路３１と、操作部１１から挿入部１０の先端部１４まで延びる吸引口側管路３２とによって構成されている。吸引源側管路３１は、コネクタ１３の口金２６に接続された接続チューブ３３を介して吸引ポンプ５に通じている。吸引口側管路３２は、操作部１１において処置具挿通チャンネル２３と合流しており、処置具挿通チャンネル２３に合流した吸引口側管路３２は、処置具挿通チャンネル２３の出口部分２５に通じている。処置具挿通チャンネル２３の出口部分２５の開口は吸引口３４としても機能し、体液等の吸引物は吸引口３４から吸引される。なお、処置具挿通チャンネル２３の入口部分２４の開口には、開閉弁を有する鉗子栓２７が装着されており、吸引時には、入口部分２４の開口が鉗子栓２７によって閉じられる。これにより、処置具挿通チャンネル２３及び吸引管路の３０の内圧が負圧に保たれる。 A suction conduit 30 is provided inside the insertion section 10, the operation section 11, and the universal cord 12. The suction conduit 30 is composed of a suction source-side conduit 31 extending from the operation unit 11 to the connector 13 via the universal cord 12, and a suction port-side conduit 32 extending from the operation unit 11 to the distal end portion 14 of the insertion unit 10. ing. The suction source side pipe line 31 communicates with the suction pump 5 via a connection tube 33 connected to the base 26 of the connector 13. The suction port side conduit 32 merges with the treatment instrument insertion channel 23 in the operation unit 11, and the suction port side conduit 32 merged with the treatment instrument insertion channel 23 communicates with the outlet portion 25 of the treatment instrument insertion channel 23. ing. The opening of the outlet portion 25 of the treatment instrument insertion channel 23 also functions as the suction port 34, and suctioned substances such as body fluid are sucked from the suction port 34. A forceps plug 27 having an opening/closing valve is attached to the opening of the inlet portion 24 of the treatment instrument insertion channel 23, and the opening of the inlet portion 24 is closed by the forceps stopper 27 during suction. As a result, the internal pressures of the treatment instrument insertion channel 23 and the suction conduit 30 are kept negative.
　そして、操作部１１には、吸引を制御する吸引制御装置１００が設けられており、吸引制御装置１００は、吸引源側管路３１と吸引口側管路３２との間に介在している。吸引制御装置１００は、操作ボタン１０１を有し、操作ボタン１０１の操作に応じて吸引源側管路３１と吸引口側管路３２とを連通させる。吸引源側管路３１と吸引口側管路３２とが連通することにより、体液等の吸引物が吸引口３４から吸引される。 The operation unit 11 is provided with a suction control device 100 that controls suction, and the suction control device 100 is interposed between the suction source side conduit 31 and the suction port side conduit 32. The suction control device 100 has an operation button 101, and connects the suction source side conduit 31 and the suction port side conduit 32 to each other in accordance with the operation of the operation button 101. The suction source side conduit 31 and the suction port side conduit 32 communicate with each other, so that a suctioned object such as body fluid is sucked from the suction port 34.
　図３は、吸引制御装置１００を示す。 FIG. 3 shows the suction control device 100.
　吸引制御装置１００は、ハウジング１０２と、ハウジング１０２に形成されている収容孔１０３に移動可能に収容されている第１可動体１０４と、第１可動体１０４に移動可能に支持されている第２可動体１０５と、第１可動体１０４を付勢する第１付勢部材１０６と、第２可動体１０５を付勢する第２付勢部材１０７とを備える。吸引制御装置１００の操作ボタン１０１は、第１可動体１０４及び第２可動体１０５によって構成される。 The suction control device 100 includes a housing 102, a first movable body 104 movably accommodated in an accommodation hole 103 formed in the housing 102, and a second movable body 104 movably supported by the first movable body 104. The movable body 105, a first biasing member 106 that biases the first movable body 104, and a second biasing member 107 that biases the second movable body 105 are provided. The operation button 101 of the suction control device 100 includes a first movable body 104 and a second movable body 105.
　ハウジング１０２は、内視鏡２の操作部１１の筐体と一体に形成され、又は操作部１１の筐体に組み付けられている。ハウジング１０２は、円柱状の収容孔１０３と、吸引源側管路３１が接続される吸引源側接続孔１０８と、吸引口側管路３２が接続される吸引口側接続孔１０９とを有する。吸引源側接続孔１０８は収容孔１０３の底面に開口しており、吸引口側接続孔１０９は収容孔１０３の内周面に開口している。 The housing 102 is formed integrally with the casing of the operation unit 11 of the endoscope 2 or is assembled to the casing of the operation unit 11. The housing 102 has a cylindrical accommodation hole 103, a suction source side connection hole 108 to which the suction source side conduit 31 is connected, and a suction port side connection hole 109 to which the suction port side conduit 32 is connected. The suction source side connection hole 108 is opened on the bottom surface of the accommodation hole 103, and the suction port side connection hole 109 is opened on the inner peripheral surface of the accommodation hole 103.
　第１可動体１０４は、円柱状に形成されており、収容孔１０３の軸方向に移動可能に収容孔１０３に嵌合している。第１付勢部材１０６は、収容孔１０３の底面と、収容孔１０３の底面に対向する第１可動体１０４の基端面との間に挟み込まれている。第１付勢部材１０６は、例えばコイルばね、ゴム等の弾性体である。ハウジング１０２及び第１可動体１０４には、第１可動体１０４の抜け止めを行う適宜な係合部（不図示）が設けられている。第１可動体１０４は、上記係合部によって抜け止めされる非吸引位置と、この非吸引位置から収容孔１０３の底面側に押し込まれた吸引位置との間で移動可能であり、第１付勢部材１０６によって吸引位置から非吸引位置に向けて付勢されている。図３には、第１可動体１０４が非吸引位置に配置されている状態が示されている。なお、図４に示すように、第１付勢部材１０６は、収容孔１０３の外に配置され、ハウジング１０２と第１可動体１０４との間に挟み込まれてもよい。 The first movable body 104 is formed in a cylindrical shape, and is fitted into the accommodation hole 103 so as to be movable in the axial direction of the accommodation hole 103. The first biasing member 106 is sandwiched between the bottom surface of the accommodation hole 103 and the base end surface of the first movable body 104 facing the bottom surface of the accommodation hole 103. The first biasing member 106 is an elastic body such as a coil spring or rubber. The housing 102 and the first movable body 104 are provided with appropriate engaging portions (not shown) that prevent the first movable body 104 from coming off. The first movable body 104 is movable between a non-suction position where it is prevented from coming off by the engagement portion and a suction position which is pushed from this non-suction position to the bottom surface side of the accommodation hole 103. The biasing member 106 biases the suction position toward the non-suction position. FIG. 3 shows a state in which the first movable body 104 is arranged at the non-suction position. Note that, as shown in FIG. 4, the first biasing member 106 may be disposed outside the accommodation hole 103 and sandwiched between the housing 102 and the first movable body 104.
　第１可動体１０４が非吸引位置に配置されている状態で、第１可動体１０４の基端側の下部１１０は収容孔１０３に収容されている。第１可動体１０４が吸引位置に配置されている状態で、第１可動体１０４の先端側の上部１１１は収容孔１０３から突出する。そして、下部１１０と上部１１１との間の中間部１１２は、第１可動体１０４が非吸引位置に配置されている状態では収容孔１０３から突出し、第１可動体１０４が吸引位置に配置されている状態では収容孔１０３に収容される。 The lower portion 110 on the proximal end side of the first movable body 104 is accommodated in the accommodation hole 103 while the first movable body 104 is arranged at the non-suction position. In a state where the first movable body 104 is arranged at the suction position, the upper portion 111 on the tip side of the first movable body 104 projects from the accommodation hole 103. The intermediate portion 112 between the lower portion 110 and the upper portion 111 projects from the accommodation hole 103 in a state where the first movable body 104 is arranged at the non-suction position, and the first movable body 104 is arranged at the suction position. In the state where it is present, it is accommodated in the accommodation hole 103.
　第１可動体１０４は、第１接続孔１１３と、第２接続孔１１４と、通気孔１１５とを有する。第１接続孔１１３は、第１可動体１０４の下部１１０から上部１１１に亘って第１可動体１０４の軸方向に延びており、第１可動体１０４の基端面に開口している。第１可動体１０４の基端面に開口している第１接続孔１１３は、吸引源側管路３１を介して吸引ポンプ５に連通している。第２接続孔１１４は、第１可動体１０４の中間部１１２において第１可動体１０４の径方向に延びており、第２接続孔１１４の少なくとも一端は、中間部１１２の外周面に開口している。第２接続孔１１４は、第１接続孔１１３と交差し、第１接続孔１１３に連通している。通気孔１１５は、第１可動体１０４の上部１１１において第１可動体１０４の径方向に延びており、通気孔１１５の少なくとも一端は、上部１１１の外周面に開口している。通気孔１１５は、第１接続孔１１３と交差し、第１接続孔１１３に連通している。 The first movable body 104 has a first connection hole 113, a second connection hole 114, and a ventilation hole 115. The first connection hole 113 extends in the axial direction of the first movable body 104 from the lower portion 110 of the first movable body 104 to the upper portion 111, and opens at the base end surface of the first movable body 104. The first connection hole 113 opened on the base end surface of the first movable body 104 communicates with the suction pump 5 via the suction source side conduit 31. The second connection hole 114 extends in the radial direction of the first movable body 104 at the intermediate portion 112 of the first movable body 104, and at least one end of the second connection hole 114 is opened to the outer peripheral surface of the intermediate portion 112. There is. The second connection hole 114 intersects the first connection hole 113 and communicates with the first connection hole 113. The ventilation hole 115 extends in the radial direction of the first movable body 104 in the upper portion 111 of the first movable body 104, and at least one end of the ventilation hole 115 is open to the outer peripheral surface of the upper portion 111. The ventilation hole 115 intersects with the first connection hole 113 and communicates with the first connection hole 113.
　第２可動体１０５は、円筒形のキャップ状に形成されており、第１可動体１０４の軸方向に移動可能に第１可動体１０４の上部１１１に嵌合している。第２付勢部材１０７は、第１可動体１０４の先端面と、第１可動体１０４の先端面に対向する第２可動体１０５の天面との間に挟み込まれている。第２付勢部材１０７は、例えばコイルばね、ゴム等の弾性体である。第１可動体１０４及び第２可動体１０５には、第２可動体１０５の抜け止めを行う適宜な係合部（不図示）が設けられている。第２可動体１０５は、上記係合部によって抜け止めされる開放位置と、この開放位置から第１可動体１０４の先端面側に押し込まれた閉塞位置との間で移動可能であり、第２付勢部材１０７によって閉塞位置から開放位置に向けて付勢されている。図３には、第２可動体１０５が開放位置に配置されている状態が示されている。 The second movable body 105 is formed in a cylindrical cap shape, and is fitted to the upper portion 111 of the first movable body 104 so as to be movable in the axial direction of the first movable body 104. The second biasing member 107 is sandwiched between the tip surface of the first movable body 104 and the top surface of the second movable body 105 that faces the tip surface of the first movable body 104. The second biasing member 107 is an elastic body such as a coil spring or rubber. The first movable body 104 and the second movable body 105 are provided with appropriate engaging portions (not shown) that prevent the second movable body 105 from coming off. The second movable body 105 is movable between an open position in which the engagement portion prevents the second movable body 105 from coming off and a closed position in which the second movable body 105 is pushed into the front end surface side of the first movable body 104 from the open position. The urging member 107 urges the closed position from the closed position. FIG. 3 shows a state in which the second movable body 105 is arranged in the open position.
　本例では、非吸引位置から吸引位置に向かう第１可動体１０４の移動方向と、開放位置から閉塞位置に向かう第２可動体１０５の移動方向とが同一方向であり、第２付勢部材１０７の付勢力は、第１付勢部材１０６の付勢力よりも大きく設定されている。換言すれば、第１付勢部材１０６及び第２付勢部材１０７が、いずれもコイルばねであるものとして、第２付勢部材１０７のばね定数は、第１付勢部材１０６のばね定数よりも大きく設定されている。 In this example, the moving direction of the first movable body 104 from the non-suction position to the suction position and the moving direction of the second movable body 105 from the open position to the closed position are the same direction, and the second biasing member 107. Is set to be larger than the urging force of the first urging member 106. In other words, assuming that both the first biasing member 106 and the second biasing member 107 are coil springs, the spring constant of the second biasing member 107 is greater than the spring constant of the first biasing member 106. It is set large.
　図５から図８は、吸引制御装置１００の動作を示す。 5 to 8 show the operation of the suction control device 100.
　図５では、第１可動体１０４及び第２可動体１０５が操作されておらず、第１可動体１０４は非吸引位置に配置されており、第２可動体１０５は開放位置に配置されている。吸引口側接続孔１０９は、第１可動体１０４の下部１１０によって閉塞されている。第１可動体１０４の中間部１１２に設けられている第２接続孔１１４と、上部１１１に設けられている通気孔１１５とは、いずれも大気に開放されている。この場合、外気が、第２接続孔１１４及び通気孔１１５を通して吸引源側管路３１に吸い込まれるだけであり、吸引口側管路３２は減圧されず、吸引力が吸引口３４に生じることもない。したがって、内視鏡先端部の出口部分２５から体内の空気や体液が漏れることを防ぐことができる。 In FIG. 5, the first movable body 104 and the second movable body 105 are not operated, the first movable body 104 is arranged in the non-suction position, and the second movable body 105 is arranged in the open position. .. The suction port side connection hole 109 is closed by the lower portion 110 of the first movable body 104. The second connection hole 114 provided in the intermediate portion 112 of the first movable body 104 and the ventilation hole 115 provided in the upper portion 111 are both open to the atmosphere. In this case, the outside air is simply sucked into the suction source side conduit 31 through the second connection hole 114 and the ventilation hole 115, the suction port side conduit 32 is not decompressed, and the suction force may be generated in the suction port 34. Absent. Therefore, it is possible to prevent the air and the body fluid in the body from leaking from the outlet portion 25 at the tip of the endoscope.
　図６から図８は、第１可動体１０４及び第２可動体１０５が操作された場合を示している。操作によって、第１可動体１０４及び第２可動体１０５が収容孔１０３の底面側に押し込まれる。ここで、第２可動体１０５を付勢している第２付勢部材１０７の付勢力が、第１可動体１０４を付勢している第１付勢部材１０６の付勢力よりも大きく設定されているため、まず、図６に示すように、第１可動体１０４が非吸引位置から吸引位置に移動される。次いで、図７及び図８に示すように、第２可動体１０５が開放位置から閉塞位置に移動される。 6 to 8 show a case where the first movable body 104 and the second movable body 105 are operated. By the operation, the first movable body 104 and the second movable body 105 are pushed into the bottom surface side of the accommodation hole 103. Here, the biasing force of the second biasing member 107 that biases the second movable body 105 is set to be larger than the biasing force of the first biasing member 106 that biases the first movable body 104. Therefore, first, as shown in FIG. 6, the first movable body 104 is moved from the non-suction position to the suction position. Next, as shown in FIGS. 7 and 8, the second movable body 105 is moved from the open position to the closed position.
　図６に示すように、第１可動体１０４が吸引位置に移動された状態で、第１可動体１０４の中間部１１２は収容孔１０３に収容されている。中間部１１２に設けられている第２接続孔１１４の全部が吸引口側接続孔１０９に重なっており、吸引口側管路３２は、第１接続孔１１３及び第２接続孔１１４を介して吸引源側管路３１に連通している。しかし、第１可動体１０４の上部１１１は収容孔１０３から突出しており、且つ第２可動体１０５は開放位置に配置されており、上部１１１に設けられている通気孔１１５が、依然として大気に開放されている。したがって、吸引口側管路３２がいくらか減圧され、僅かな吸引力が吸引口３４に生じるが、主として、外気が、通気孔１１５を通して吸引源側管路３１に吸い込まれる。また、この状態で体液が逆流してきた場合には、吸引源側管路３１に吸引されるため、操作者に飛散することはない。 As shown in FIG. 6, the intermediate portion 112 of the first movable body 104 is accommodated in the accommodation hole 103 while the first movable body 104 is moved to the suction position. All of the second connection holes 114 provided in the intermediate portion 112 overlap with the suction port side connection holes 109, and the suction port side conduit 32 is sucked through the first connection holes 113 and the second connection holes 114. It communicates with the source side conduit 31. However, the upper portion 111 of the first movable body 104 projects from the accommodation hole 103, the second movable body 105 is arranged in the open position, and the ventilation hole 115 provided in the upper portion 111 is still open to the atmosphere. Has been done. Therefore, although the suction port side conduit 32 is decompressed to some extent and a slight suction force is generated in the suction port 34, the outside air is mainly sucked into the suction source side conduit 31 through the ventilation hole 115. Further, when the body fluid flows back in this state, the body fluid is sucked into the suction source side conduit 31 and is not scattered to the operator.
　図７及び図８に示すように、第２可動体１０５が閉塞位置に向けて移動されると、第１可動体１０４の上部１１１に設けられている通気孔１１５が、第２可動体１０５によって次第に閉じられる。通気孔１１５の縮小に伴い、通気孔１１５を通して吸引源側管路３１に吸い込まれる外気の流量が減少する。通気孔１１５を流れる外気の流量の減少に応じ、吸引口側管路３２の圧力の減少量が大きくなり、吸引口３４に生じる吸引力が上昇する。 As shown in FIGS. 7 and 8, when the second movable body 105 is moved toward the closed position, the ventilation hole 115 provided in the upper portion 111 of the first movable body 104 is moved by the second movable body 105. Gradually closed. With the reduction of the ventilation holes 115, the flow rate of the outside air sucked into the suction source side conduit 31 through the ventilation holes 115 decreases. As the flow rate of the outside air flowing through the ventilation hole 115 decreases, the amount of decrease in the pressure of the suction port side conduit 32 increases, and the suction force generated in the suction port 34 increases.
　図９は、図５から図８に示した吸引制御装置１００の動作において、吸引口３４に生じる吸引力の変化を示す。横軸は、第１可動体１０４が非吸引位置に配置され且つ第２可動体１０５が開放位置に配置されている際の第２可動体１０５の位置を原点とし、ハウジング１０２に対する第２可動体１０５の変位量Ｄである。また、縦軸は、吸引口３４における吸引力Ｐである。なお、吸引力Ｐは、大気圧と吸引口３４の内圧との差とする。 FIG. 9 shows changes in the suction force generated at the suction port 34 in the operation of the suction control device 100 shown in FIGS. 5 to 8. The horizontal axis is the position of the second movable body 105 when the first movable body 104 is arranged in the non-suction position and the second movable body 105 is arranged in the open position, and the second movable body with respect to the housing 102 is the origin. The displacement amount D of 105. The vertical axis represents the suction force P at the suction port 34. The suction force P is the difference between the atmospheric pressure and the internal pressure of the suction port 34.
　変位量Ｄ１は、第１可動体１０４が吸引位置に移動された際の、第２可動体１０５の変位量である（図６参照）。変位量Ｄ２は、第１可動体１０４が吸引位置に移動され、さらに、第２可動体１０５が開放位置との閉塞位置との間の中間位置に移動された際の、第２可動体１０５の変位量である（図７参照）。そして、変位量Ｄ３は、第１可動体１０４が吸引位置に移動され、さらに、第２可動体１０５が閉塞位置に移動された際の、第２可動体１０５の変位量である（図８参照）。 The displacement amount D1 is the displacement amount of the second movable body 105 when the first movable body 104 is moved to the suction position (see FIG. 6). The amount of displacement D2 of the second movable body 105 when the first movable body 104 is moved to the suction position and the second movable body 105 is further moved to an intermediate position between the open position and the closed position. The amount of displacement (see FIG. 7). The displacement amount D3 is the displacement amount of the second movable body 105 when the first movable body 104 is moved to the suction position and the second movable body 105 is further moved to the closed position (see FIG. 8). ).
　変位量Ｄ３において、吸引力Ｐは最大値Ｐ３となる。変位量Ｄ１における吸引力Ｐ１は、吸引力Ｐの最大値Ｐ３に対して極めて小さく、吸引口３４から体液等の吸引物を吸引するには不足である。吸引口３４から体液等の吸引物を吸引するのに必要な吸引力が、例えば変位量Ｄ２における吸引力Ｐ２であるものとして、変位量Ｄ１において、第２接続孔１１４の全部が吸引口側接続孔１０９に重なっており、第２接続孔１１４と吸引口側接続孔１０９との接続箇所が完全に開通している。これにより、変位量Ｄ２において吸引がなされた際に、吸引物が、第２接続孔１１４と吸引口側接続孔１０９との接続箇所に引っ掛かることが抑制され、吸引管路３０の詰まりが抑制される。 At the displacement amount D3, the suction force P becomes the maximum value P3. The suction force P1 at the displacement amount D1 is extremely small with respect to the maximum value P3 of the suction force P, and is insufficient for sucking a suctioned object such as body fluid from the suction port 34. Assuming that the suction force required to suck a suctioned object such as body fluid from the suction port 34 is the suction force P2 at the displacement amount D2, for example, at the displacement amount D1, all of the second connection holes 114 are connected to the suction port side. It overlaps with the hole 109, and the connection portion between the second connection hole 114 and the suction port side connection hole 109 is completely opened. As a result, when suction is performed at the displacement amount D2, it is possible to prevent the suctioned substance from being caught at the connection portion between the second connection hole 114 and the suction port side connection hole 109, and to suppress clogging of the suction conduit 30. It
　図１０は、吸引制御装置１００の変形例を示す。 FIG. 10 shows a modification of the suction control device 100.
　図１０に示す例では、第１可動体１０４の上部１１１に設けられる通気孔１１５が、第１可動体１０４の径方向に延びており、通気孔１１５の一端が、上部１１１の外周面に開口している。そして、第２可動体１０５が、通気孔１１５と平行な第１可動体１０４の径方向に移動可能に上部１１１に被さっている。第２可動体１０５は、通気孔１１５の開口側において上部１１１の外周面と第２可動体１０５の内周面との間に適宜な隙間がおかれる開放位置と、上部１１１の外周面と第２可動体１０５の内周面とが密接する閉塞位置との間で移動可能であり、第２付勢部材１０７によって閉塞位置から開放位置に向けて付勢されている。図１０には、第２可動体１０５が開放位置に配置されている状態が示されている。 In the example shown in FIG. 10, the ventilation hole 115 provided in the upper portion 111 of the first movable body 104 extends in the radial direction of the first movable body 104, and one end of the ventilation hole 115 is opened to the outer peripheral surface of the upper portion 111. doing. Then, the second movable body 105 covers the upper portion 111 so as to be movable in the radial direction of the first movable body 104 parallel to the ventilation hole 115. The second movable body 105 has an open position where an appropriate gap is provided between the outer peripheral surface of the upper portion 111 and the inner peripheral surface of the second movable body 105 on the opening side of the ventilation hole 115, and the outer peripheral surface of the upper portion 111 and the first movable body 105. The second movable member 105 is movable between a closed position in which the inner peripheral surface of the movable body 105 and the movable member 105 are in close contact with each other, and is urged by the second urging member 107 from the closed position to the open position. FIG. 10 shows a state in which the second movable body 105 is arranged in the open position.
　第１可動体１０４及び第２可動体１０５が収容孔１０３の底面側に押し込まれ、第１可動体１０４が吸引位置に移動された場合に、吸引口側管路３２は、第１接続孔１１３及び第２接続孔１１４を介して吸引源側管路３１に連通する。しかし、第１可動体１０４の上部１１１は収容孔１０３から突出しており、且つ第２可動体１０５は開放位置に配置されており、上部１１１に設けられている通気孔１１５が、依然として大気に開放される。したがって、吸引口側管路３２がいくらか減圧され、僅かな吸引力が吸引口３４に生じるが、主として、外気が、通気孔１１５を通して吸引源側管路３１に吸い込まれる。 When the first movable body 104 and the second movable body 105 are pushed into the bottom surface side of the accommodation hole 103 and the first movable body 104 is moved to the suction position, the suction port side conduit 32 is connected to the first connection hole 113. And the suction source side conduit 31 through the second connection hole 114. However, the upper portion 111 of the first movable body 104 projects from the accommodation hole 103, the second movable body 105 is arranged in the open position, and the ventilation hole 115 provided in the upper portion 111 is still open to the atmosphere. To be done. Therefore, although the suction port side conduit 32 is decompressed to some extent and a slight suction force is generated in the suction port 34, the outside air is mainly sucked into the suction source side conduit 31 through the ventilation hole 115.
　第１可動体１０４が吸引位置に配置されている状態で、第２可動体１０５が閉塞位置に向けて移動されると、通気孔１１５の開口側における第１可動体１０４の上部１１１の外周面と第２可動体１０５の内周面との隙間が次第に狭められる。通気孔１１５に通じる隙間の縮小に伴い、通気孔１１５を通して吸引源側管路３１に吸い込まれる外気の流量が減少する。通気孔１１５を流れる外気の流量の減少に応じ、吸引口側管路３２の圧力の減少量が大きくなり、吸引口３４に生じる吸引力が上昇する。吸引力が上昇に転じるタイミングでは、第２接続孔１１４の全部が吸引口側接続孔１０９に重なっており、第２接続孔１１４と吸引口側接続孔１０９との接続箇所が完全に開通している。これにより、吸引物が、第２接続孔１１４と吸引口側接続孔１０９との接続箇所に引っ掛かることが抑制され、吸引管路３０の詰まりが抑制される。 When the second movable body 105 is moved toward the closed position while the first movable body 104 is arranged at the suction position, the outer peripheral surface of the upper portion 111 of the first movable body 104 on the opening side of the ventilation hole 115. And the gap between the inner peripheral surface of the second movable body 105 is gradually narrowed. With the reduction of the gap communicating with the ventilation hole 115, the flow rate of the outside air sucked into the suction source side conduit 31 through the ventilation hole 115 decreases. As the flow rate of the outside air flowing through the ventilation hole 115 decreases, the amount of decrease in the pressure of the suction port side conduit 32 increases, and the suction force generated in the suction port 34 increases. At the timing when the suction force starts to rise, the entire second connection hole 114 overlaps the suction port side connection hole 109, and the connection portion between the second connection hole 114 and the suction port side connection hole 109 is completely opened. There is. As a result, the suctioned substance is suppressed from being caught in the connection portion between the second connection hole 114 and the suction port side connection hole 109, and the clogging of the suction pipeline 30 is suppressed.
　本例では、非吸引位置から吸引位置に向かう第１可動体１０４の移動方向と、開放位置から閉塞位置に向かう第２可動体１０５の移動方向とが交差しており、第１可動体１０４の吸引位置に向けた移動と、第２可動体１０５の閉塞位置に向けた移動とは、互いに独立である。したがって、第２付勢部材１０７の付勢力を、第１付勢部材１０６の付勢力以下に設定でき、第２可動体１０５の移動に要する操作力を低減できる。 In this example, the moving direction of the first movable body 104 from the non-suction position to the suction position and the moving direction of the second movable body 105 from the open position to the closed position intersect, and The movement toward the suction position and the movement toward the closed position of the second movable body 105 are independent of each other. Therefore, the urging force of the second urging member 107 can be set to be equal to or less than the urging force of the first urging member 106, and the operation force required to move the second movable body 105 can be reduced.
　図１１は、本発明の実施形態を説明するための、内視鏡の吸引制御装置の他の例を示す。なお、図１１に示す吸引制御装置を備える内視鏡は、基本的に図１及び図２に示した内視鏡２と同一であるが、内視鏡内に吸引源側管路３１が内蔵されていない。ただし、吸引源側管路３１が内蔵されている場合でも実施可能である。 FIG. 11 shows another example of the suction control device of the endoscope for explaining the embodiment of the present invention. The endoscope including the suction control device shown in FIG. 11 is basically the same as the endoscope 2 shown in FIGS. 1 and 2, but the suction source side conduit 31 is built in the endoscope. It has not been. However, it can be implemented even when the suction source side conduit 31 is built in.
　吸引制御装置２００は、ハウジング２０２と、ハウジング２０２に形成されている収容孔２０３に移動可能に収容されている第１可動体２０４と、第１可動体２０４に移動可能に支持されている第２可動体２０５と、第１可動体２０４を付勢する第１付勢部材２０６と、第２可動体２０５を付勢する第２付勢部材２０７とを備える。 The suction control device 200 includes a housing 202, a first movable body 204 movably accommodated in an accommodation hole 203 formed in the housing 202, and a second movable body 204 movably supported by the first movable body 204. The movable body 205, a first biasing member 206 that biases the first movable body 204, and a second biasing member 207 that biases the second movable body 205 are provided.
　ハウジング２０２は、円柱状の収容孔２０３と、吸引口側管路３２が接続される吸引口側接続孔２０９とを有する。吸引口側接続孔２０９は収容孔１０３の周面に開口している。 The housing 202 has a cylindrical accommodation hole 203 and a suction port side connection hole 209 to which the suction port side conduit 32 is connected. The suction port side connection hole 209 is opened on the peripheral surface of the accommodation hole 103.
　第１可動体２０４は、円柱状に形成されており、収容孔２０３の軸方向に移動可能に収容孔２０３に嵌合している。第１付勢部材２０６は、収容孔２０３の底面と、収容孔２０３の底面に対向する第１可動体２０４の基端面との間に挟み込まれている。ハウジング２０２及び第１可動体２０４には、第１可動体２０４の抜け止めを行う適宜な係合部（不図示）が設けられている。第１可動体２０４は、上記係合部によって抜け止めされる非吸引位置と、この非吸引位置から収容孔２０３の底面側に押し込まれた吸引位置との間で移動可能であり、第１付勢部材２０６によって吸引位置から非吸引位置に向けて付勢されている。図１１には、第１可動体２０４が非吸引位置に配置されている状態が示されている。なお、図４に示した吸引制御装置１００と同様、第１付勢部材２０６は、収容孔２０３の外に配置され、ハウジング２０２と第１可動体２０４との間に挟み込まれてもよい。 The first movable body 204 is formed in a cylindrical shape, and is fitted into the accommodation hole 203 so as to be movable in the axial direction of the accommodation hole 203. The first biasing member 206 is sandwiched between the bottom surface of the accommodation hole 203 and the base end surface of the first movable body 204 facing the bottom surface of the accommodation hole 203. The housing 202 and the first movable body 204 are provided with appropriate engaging portions (not shown) that prevent the first movable body 204 from coming off. The first movable body 204 is movable between a non-suction position where it is prevented from coming off by the engaging portion and a suction position which is pushed from this non-suction position to the bottom surface side of the accommodation hole 203. The biasing member 206 biases the suction position toward the non-suction position. FIG. 11 shows a state in which the first movable body 204 is arranged at the non-suction position. Note that, like the suction control device 100 shown in FIG. 4, the first urging member 206 may be arranged outside the accommodation hole 203 and sandwiched between the housing 202 and the first movable body 204.
　第１可動体２０４が非吸引位置に配置されている状態で、第１可動体２０４の基端側の下部２１０は収容孔２０３に収容されている。第１可動体２０４が吸引位置に配置されている状態で、第１可動体２０４の先端側の上部２１１は収容孔２０３から突出する。そして、下部２１０と上部２１１との間の中間部２１２は、第１可動体２０４が非吸引位置に配置されている状態では収容孔２０３から突出し、第１可動体２０４が吸引位置に配置されている状態では収容孔２０３に収容される。 The lower portion 210 on the proximal end side of the first movable body 204 is accommodated in the accommodation hole 203 while the first movable body 204 is arranged at the non-suction position. In a state where the first movable body 204 is arranged at the suction position, the upper portion 211 on the tip side of the first movable body 204 projects from the accommodation hole 203. Then, the intermediate portion 212 between the lower portion 210 and the upper portion 211 projects from the accommodation hole 203 in a state where the first movable body 204 is arranged at the non-suction position, and the first movable body 204 is arranged at the suction position. In the state where it is present, it is accommodated in the accommodation hole 203.
　第１可動体２０４は、吸引チューブ３３が接続される吸引源側接続孔２０８と、第１接続孔２１３と、第２接続孔２１４と、通気孔２１５とを有する。吸引源側接続孔２０８は、第１可動体２０４の上部２１１に設けられており、吸引チューブ３３を介して直接吸引ポンプ５に接続される。第１接続孔２１３は、第１可動体２０４の上部２１１において、吸引源側接続孔２０８から第１可動体１０４の径方向に延びている。第１接続孔２１３は、吸引チューブ３３を介して吸引ポンプ５に連通している。第２接続孔２１４は、第１可動体２０４の中間部２１２において第１可動体２０４の径方向に延びており、第２接続孔２１４の少なくとも一端は、中間部２１２の外周面に開口している。第２接続孔２１４は、第１可動体１０４の軸方向に延びる接続孔２１６を介して第１接続孔２１３に連通している。通気孔２１５は、第１可動体２０４の上部２１１において第１可動体２０４の径方向に延びており、通気孔２１５の一端は、上部２１１の外周面に開口している。通気孔２１５は、第１接続孔２１３と交差し、第１接続孔２１３に連通している。 The first movable body 204 has a suction source side connection hole 208 to which the suction tube 33 is connected, a first connection hole 213, a second connection hole 214, and a ventilation hole 215. The suction source side connection hole 208 is provided in the upper portion 211 of the first movable body 204, and is directly connected to the suction pump 5 via the suction tube 33. The first connection hole 213 extends in the radial direction of the first movable body 104 from the suction source side connection hole 208 in the upper portion 211 of the first movable body 204. The first connection hole 213 communicates with the suction pump 5 via the suction tube 33. The second connection hole 214 extends in the radial direction of the first movable body 204 in the intermediate portion 212 of the first movable body 204, and at least one end of the second connection hole 214 is opened to the outer peripheral surface of the intermediate portion 212. There is. The second connection hole 214 communicates with the first connection hole 213 via a connection hole 216 extending in the axial direction of the first movable body 104. The ventilation hole 215 extends in the radial direction of the first movable body 204 in the upper portion 211 of the first movable body 204, and one end of the ventilation hole 215 opens to the outer peripheral surface of the upper portion 211. The ventilation hole 215 intersects with the first connection hole 213 and communicates with the first connection hole 213.
　第２可動体２０５は、円筒形のキャップ状に形成されており、第１可動体２０４の軸方向に移動可能に第１可動体２０４の上部２１１に嵌合している。第２付勢部材２０７は、第１可動体２０４の先端面と、第１可動体２０４の先端面に対向する第２可動体２０５の天面との間に挟み込まれている。第１可動体２０４及び第２可動体２０５には、第２可動体２０５の抜け止めを行う適宜な係合部（不図示）が設けられている。第２可動体２０５は、上記係合部によって抜け止めされる開放位置と、この開放位置から第１可動体２０４の先端面側に押し込まれた閉塞位置との間で移動可能であり、第２付勢部材２０７によって閉塞位置から開放位置に向けて付勢されている。図１１には、第２可動体２０５が開放位置に配置されている状態が示されている。 The second movable body 205 is formed in a cylindrical cap shape, and is fitted to the upper portion 211 of the first movable body 204 so as to be movable in the axial direction of the first movable body 204. The second biasing member 207 is sandwiched between the tip surface of the first movable body 204 and the top surface of the second movable body 205 that faces the tip surface of the first movable body 204. The first movable body 204 and the second movable body 205 are provided with appropriate engaging portions (not shown) that prevent the second movable body 205 from coming off. The second movable body 205 is movable between an open position where the engagement portion prevents the second movable body 205 from coming off, and a closed position in which the second movable body 205 is pushed toward the front end surface side of the first movable body 204 from the open position. The urging member 207 urges the closed position from the closed position. FIG. 11 shows a state in which the second movable body 205 is arranged in the open position.
　本例では、非吸引位置から吸引位置に向かう第１可動体２０４の移動方向と、開放位置から閉塞位置に向かう第２可動体２０５の移動方向とが同一方向であり、第２付勢部材２０７の付勢力は、第１付勢部材２０６の付勢力よりも大きく設定されている。 In this example, the moving direction of the first movable body 204 from the non-suction position to the suction position and the moving direction of the second movable body 205 from the open position to the closed position are the same direction, and the second biasing member 207. Is set to be larger than the urging force of the first urging member 206.
　図１２から図１５は、吸引制御装置２００の動作を示す。 12 to 15 show the operation of the suction control device 200.
　図１２では、第１可動体２０４及び第２可動体２０５が操作されておらず、第１可動体２０４は非吸引位置に配置されており、第２可動体２０５は開放位置に配置されている。吸引口側管路３２が接続されている吸引口側接続孔２０９は、第１可動体２０４の下部２１０によって閉塞されている。第１可動体２０４の中間部２１２に設けられている第２接続孔２１４と、上部２１１に設けられている通気孔２１５とは、いずれも大気に開放されている。この場合、外気が、第２接続孔２１４及び通気孔２１５を通して吸引チューブ３３に吸い込まれるだけであり、吸引口側管路３２は減圧されず、吸引力が吸引口３４に生じることもない。 In FIG. 12, the first movable body 204 and the second movable body 205 are not operated, the first movable body 204 is arranged in the non-suction position, and the second movable body 205 is arranged in the open position. .. The suction port side connection hole 209 to which the suction port side conduit 32 is connected is closed by the lower portion 210 of the first movable body 204. The second connection hole 214 provided in the intermediate portion 212 of the first movable body 204 and the ventilation hole 215 provided in the upper portion 211 are both open to the atmosphere. In this case, the outside air is simply sucked into the suction tube 33 through the second connection hole 214 and the ventilation hole 215, the suction port side conduit 32 is not depressurized, and the suction force is not generated in the suction port 34.
　図１３から図１５は、第１可動体２０４及び第２可動体２０５が操作された場合を示している。操作によって、第１可動体２０４及び第２可動体２０５が収容孔２０３の底面側に押し込まれる。ここで、第２可動体２０５を付勢している第２付勢部材２０７の付勢力が、第１可動体２０４を付勢している第１付勢部材２０６の付勢力よりも大きく設定されているため、まず、図１３に示すように、第１可動体２０４が非吸引位置から吸引位置に移動される。次いで、図１４及び図１５に示すように、第２可動体２０５が開放位置から閉塞位置に移動される。 13 to 15 show a case where the first movable body 204 and the second movable body 205 are operated. By the operation, the first movable body 204 and the second movable body 205 are pushed into the bottom surface side of the accommodation hole 203. Here, the biasing force of the second biasing member 207 that biases the second movable body 205 is set to be larger than the biasing force of the first biasing member 206 that biases the first movable body 204. Therefore, first, as shown in FIG. 13, the first movable body 204 is moved from the non-suction position to the suction position. Next, as shown in FIGS. 14 and 15, the second movable body 205 is moved from the open position to the closed position.
　図１３に示すように、第１可動体２０４が吸引位置に移動された状態で、第１可動体２０４の中間部２１２は収容孔２０３に収容されている。中間部２１２に設けられている第２接続孔２１４の全部が吸引口側接続孔２０９に重なっており、吸引口側管路３２は、第１接続孔２１３及び第２接続孔２１４を介して吸引チューブ３３に連通している。しかし、第１可動体２０４の上部２１１は収容孔２０３から突出しており、且つ第２可動体２０５は開放位置に配置されており、上部２１１に設けられている通気孔２１５が、依然として大気に開放されている。したがって、吸引口側管路３２がいくらか減圧され、僅かな吸引力が吸引口３４に生じるが、主として、外気が、通気孔２１５を通して吸引チューブ３３に吸い込まれる。 As shown in FIG. 13, the intermediate portion 212 of the first movable body 204 is accommodated in the accommodation hole 203 in a state where the first movable body 204 is moved to the suction position. All of the second connection holes 214 provided in the intermediate portion 212 overlap the suction port side connection holes 209, and the suction port side conduit 32 is sucked through the first connection holes 213 and the second connection holes 214. It communicates with the tube 33. However, the upper part 211 of the first movable body 204 projects from the accommodation hole 203, the second movable body 205 is arranged in the open position, and the ventilation hole 215 provided in the upper part 211 is still open to the atmosphere. Has been done. Therefore, although the suction port side conduit 32 is decompressed to some extent and a slight suction force is generated in the suction port 34, mainly the outside air is sucked into the suction tube 33 through the ventilation hole 215.
　図１４及び図１５に示すように、第２可動体２０５が閉塞位置に向けて移動されると、第１可動体２０４の上部２１１に設けられている通気孔２１５が、第２可動体２０５によって次第に閉じられる。通気孔２１５の縮小に伴い、通気孔２１５を通して吸引チューブ３３に吸い込まれる外気の流量が減少する。通気孔２１５を流れる外気の流量の減少に応じ、吸引口側管路３２の圧力の減少量が大きくなり、吸引口３４に生じる吸引力が上昇する。吸引力が上昇に転じるタイミングでは、第２接続孔２１４の全部が吸引口側接続孔２０９に重なっており、第２接続孔２１４と吸引口側接続孔２０９との接続箇所が完全に開通しており、吸引物が、第２接続孔２１４と吸引口側接続孔２０９との接続箇所に引っ掛かることが抑制され、吸引管路３０の詰まりが抑制される。 As shown in FIGS. 14 and 15, when the second movable body 205 is moved toward the closed position, the ventilation hole 215 provided in the upper portion 211 of the first movable body 204 is moved by the second movable body 205. Gradually closed. With the reduction of the ventilation hole 215, the flow rate of the outside air sucked into the suction tube 33 through the ventilation hole 215 decreases. As the flow rate of the outside air flowing through the ventilation hole 215 decreases, the amount of decrease in the pressure of the suction port side conduit 32 increases, and the suction force generated in the suction port 34 increases. At the timing when the suction force starts to rise, the entire second connection hole 214 overlaps the suction port side connection hole 209, and the connection portion between the second connection hole 214 and the suction port side connection hole 209 is completely opened. Therefore, it is possible to prevent the suctioned substance from being caught at the connection portion between the second connection hole 214 and the suction port side connection hole 209, and to prevent the suction pipe line 30 from being clogged.
　なお、図１６に示すように、第２可動体１０５は、通気孔２１５と平行な第１可動体２０４の径方向に移動可能に第１可動体２０４の上部２１１に被さってもよい。この場合、非吸引位置から吸引位置に向かう第１可動体２０４の移動方向と、開放位置から閉塞位置に向かう第２可動体２０５の移動方向とが交差し、第１可動体１０４の吸引位置に向けた移動と、第２可動体１０５の閉塞位置に向けた移動とが、互いに独立となる。したがって、第２付勢部材２０７の付勢力を、第１付勢部材２０６の付勢力以下に設定でき、第２可動体２０５の移動に要する操作力を低減できる。 Note that, as shown in FIG. 16, the second movable body 105 may cover the upper portion 211 of the first movable body 204 so as to be movable in the radial direction of the first movable body 204 parallel to the ventilation hole 215. In this case, the moving direction of the first movable body 204 from the non-suction position to the suction position and the moving direction of the second movable body 205 from the open position to the closed position intersect with each other to reach the suction position of the first movable body 104. The movement toward the second movable body 105 and the movement toward the closed position of the second movable body 105 are independent of each other. Therefore, the urging force of the second urging member 207 can be set to be equal to or less than the urging force of the first urging member 206, and the operation force required to move the second movable body 205 can be reduced.
　以上説明したとおり、本明細書に開示された内視鏡の吸引制御装置は、ハウジングと、上記ハウジングに形成されている収容孔に移動可能に収容されている第１可動体と、上記第１可動体に移動可能に支持されている第２可動体と、上記第１可動体を付勢する第１付勢部材と、上記第２可動体を付勢する第２付勢部材と、を備え、上記第１可動体は、吸引源に連通される第１接続孔と、上記第１接続孔に連通しており且つ内視鏡の吸引口に連通される第２接続孔と、上記第１接続孔に連通している通気孔と、を有し、上記第１可動体は、上記内視鏡の吸引口と上記第２接続孔とを連通させる吸引位置と、上記内視鏡の吸引口と上記第２接続孔との連通を切断する非吸引位置との間で移動可能に上記収容孔に収容され、上記第１付勢部材によって上記吸引位置から上記非吸引位置に向けて付勢されており、上記第２可動体は、上記通気孔を大気に開放する開放位置と、上記通気孔を閉塞する閉塞位置との間で移動可能に上記第１可動体に支持され、上記第２付勢部材によって上記閉塞位置から上記開放位置に向けて付勢されており、上記第１可動体が上記非吸引位置に配置されている場合に、上記第２可動体は上記開放位置に配置されており、上記第１可動体が上記吸引位置に配置されている場合に、上記第２可動体は上記開放位置若しくは上記閉塞位置又は上記開放位置と上記閉塞位置との間の中間位置に配置可能である。 As described above, the suction control device for an endoscope disclosed in the present specification includes a housing, a first movable body movably housed in a housing hole formed in the housing, and the first movable body. A second movable body movably supported by the movable body, a first urging member that urges the first movable body, and a second urging member that urges the second movable body. The first movable body has a first connection hole that communicates with a suction source, a second connection hole that communicates with the first connection hole and that communicates with a suction port of an endoscope, A ventilation hole communicating with the connection hole, wherein the first movable body has a suction position at which the suction port of the endoscope communicates with the second connection hole, and a suction port of the endoscope. Is housed in the housing hole so as to be movable between a non-suction position where communication with the second connection hole is cut off, and is biased from the suction position toward the non-suction position by the first biasing member. The second movable body is movably supported by the first movable body between an open position for opening the vent hole to the atmosphere and a closed position for closing the vent hole. When the first movable body is urged from the closed position to the open position by the biasing member and the first movable body is arranged in the non-suction position, the second movable body is arranged in the open position. When the first movable body is arranged at the suction position, the second movable body can be arranged at the open position, the closed position, or an intermediate position between the open position and the closed position. is there.
　また、本明細書に開示された内視鏡の吸引制御装置は、上記非吸引位置から上記吸引位置に向かう上記第１可動体の移動方向と、上記開放位置から上記閉塞位置に向かう上記第２可動体の移動方向とが同一方向であり、上記第２付勢部材の付勢力は、上記第１付勢部材の付勢力よりも大きい。 Further, in the suction control device for an endoscope disclosed in the present specification, the moving direction of the first movable body from the non-suction position to the suction position and the second movement from the open position to the closed position. The moving direction of the movable body is the same direction, and the urging force of the second urging member is larger than the urging force of the first urging member.
　また、本明細書に開示された内視鏡の吸引制御装置は、上記非吸引位置から上記吸引位置に向かう上記第１可動体の移動方向と、上記開放位置から上記閉塞位置に向かう上記第２可動体の移動方向とが交差している。 Further, in the suction control device for an endoscope disclosed in the present specification, the moving direction of the first movable body from the non-suction position to the suction position and the second movement from the open position to the closed position. The moving direction of the movable body intersects.
　また、本明細書に開示された内視鏡の吸引制御装置は、上記第１可動体は、上記収容孔に押し込まれることによって上記非吸引位置から上記吸引位置に移動し、上記非吸引位置において上記収容孔に収容される下部と、上記非吸引位置において上記収容から突出し、且つ上記吸引位置において上記収容孔に収容される中間部と、上記吸引位置において上記収容孔から突出する上部と、を有し、上記ハウジングは、上記吸引口に連通される吸引口側接続孔を有し、上記吸引口側接続孔は、上記収容孔の内周面において、上記非吸引位置に配置されている上記第１可動体の上記下部及び上記吸引位置に配置されている上記第１可動体の上記中間部と対向する領域に開口しており、上記第２接続孔は、上記中間部に設けられており、上記通気孔は、上記上部に設けられている。 Further, in the endoscope suction control device disclosed in the present specification, the first movable body is pushed into the accommodation hole to move from the non-suction position to the suction position, and at the non-suction position. A lower part housed in the housing hole, an intermediate part projecting from the housing at the non-suction position and housed in the housing hole at the suction position, and an upper part projecting from the housing hole at the suction position. The housing has a suction port side connection hole communicating with the suction port, and the suction port side connection hole is arranged at the non-suction position on the inner peripheral surface of the accommodation hole. The first movable body is opened in a region facing the intermediate portion of the first movable body arranged at the lower portion and the suction position, and the second connection hole is provided in the intermediate portion. The vent hole is provided in the upper portion.
　また、本明細書に開示された内視鏡は、上記吸引制御装置を操作部に備える。 Further, the endoscope disclosed in the present specification includes the suction control device in the operation unit.
　以上、図面を参照しながら各種の実施の形態について説明したが、本発明はかかる例に限定されないことは言うまでもない。当業者であれば、特許請求の範囲に記載された範疇内において、各種の変更例又は修正例に想到し得ることは明らかであり、それらについても当然に本発明の技術的範囲に属するものと了解される。また、発明の趣旨を逸脱しない範囲において、上記実施の形態における各構成要素を任意に組み合わせてもよい。 Although various embodiments have been described above with reference to the drawings, it goes without saying that the present invention is not limited to such examples. It is obvious to those skilled in the art that various changes or modifications can be conceived within the scope described in the claims, and naturally, these also belong to the technical scope of the present invention. Understood. Further, the constituent elements in the above-described embodiments may be arbitrarily combined without departing from the spirit of the invention.
　なお、本出願は、２０１９年２月８日出願の日本特許出願（特願２０１９－０２１６８４）に基づくものであり、その内容は本出願の中に参照として援用される。 The present application is based on the Japanese patent application (Japanese Patent Application No. 2019-021684) filed on February 8, 2019, the contents of which are incorporated by reference in the present application.
１　内視鏡システム
２　内視鏡
３　光源装置
４　プロセッサユニット
５　吸引ポンプ（吸引源）
６　モニタ
１０　挿入部
１１　操作部
１２　ユニバーサルコード
１３　コネクタ
１４　挿入部の先端部
１５　湾曲部
１６　軟性部
１７　撮像部
１８　操作ノブ
１９　操作ボタン
２０　ライトガイド
２１　電気ケーブル
２２　操作ワイヤ
２３　処置具挿通チャンネル
２４　処置具挿通チャンネルの入口部分
２５　処置具挿通チャンネルの出口部分
２６　口金
２７　鉗子栓
３０　吸引管路
３１　吸引源側管路
３２　吸引口側管路
３３　接続チューブ
３４　吸引口
１００　吸引制御装置
１０１　操作ボタン
１０２　ハウジング
１０３　収容孔
１０４　第１可動体
１０５　第２可動体
１０６　第１付勢部材
１０７　第２付勢部材
１０８　吸引源側接続孔
１０９　吸引口側接続孔
１１０　第１可動体の下部
１１１　第１可動体の上部
１１２　第１可動体の中間部
１１３　第１接続孔
１１４　第２接続孔
１１５　通気孔
２００　吸引制御装置
２０２　ハウジング
２０３　収容孔
２０４　第１可動体
２０５　第２可動体
２０６　第１付勢部材
２０７　第２付勢部材
２０８　吸引源側接続孔
２０９　吸引口側接続孔
２１０　第１可動体の下部
２１１　第１可動体の上部
２１２　第１可動体の中間部
２１３　第１接続孔
２１４　第２接続孔
２１５　通気孔
２１６　接続孔
Ｄ　変位量
Ｐ　吸引力
  1 Endoscope System 2 Endoscope 3 Light Source Device 4 Processor Unit 5 Suction Pump (Suction Source)
6 monitor 10 insertion part 11 operation part 12 universal cord 13 connector 14 tip part of insertion part 15 curved part 16 flexible part 17 imaging part 18 operation knob 19 operation button 20 light guide 21 electric cable 22 operation wire 23 treatment instrument insertion channel 24 treatment Inlet part 25 of instrument insertion channel Outlet part 26 of treatment instrument insertion channel 26 Base 27 Suction plug 30 Suction conduit 31 Suction source side conduit 32 Suction port side conduit 33 Connection tube 34 Suction port 100 Suction control device 101 Operation button 102 Housing 103 accommodation hole 104 first movable body 105 second movable body 106 first urging member 107 second urging member 108 suction source side connection hole 109 suction port side connection hole 110 lower part of the first movable body 111 of the first movable body Upper part 112 Middle part of the first movable body 113 First connection hole 114 Second connection hole 115 Vent hole 200 Suction control device 202 Housing 203 Housing hole 204 First movable body 205 Second movable body 206 First urging member 207 Second Energizing member 208 Suction source side connection hole 209 Suction port side connection hole 210 First movable body lower part 211 First movable body upper part 212 First movable body intermediate part 213 First connection hole 214 Second connection hole 215 Vent hole 216 Connection hole D Displacement amount P Suction force

Claims (5)

  1. 　ハウジングと、
    　前記ハウジングに形成されている収容孔に移動可能に収容されている第１可動体と、
    　前記第１可動体に移動可能に支持されている第２可動体と、
    　前記第１可動体を付勢する第１付勢部材と、
    　前記第２可動体を付勢する第２付勢部材と、
    　を備え、
    　前記第１可動体は、
    　吸引源に連通される第１接続孔と、
    　前記第１接続孔に連通しており且つ内視鏡の吸引口に連通される第２接続孔と、
    　前記第１接続孔に連通している通気孔と、
    　を有し、
    　前記第１可動体は、前記内視鏡の吸引口と前記第２接続孔とを連通させる吸引位置と、前記内視鏡の吸引口と前記第２接続孔との連通を切断する非吸引位置との間で移動可能に前記収容孔に収容され、前記第１付勢部材によって前記吸引位置から前記非吸引位置に向けて付勢されており、
    　前記第２可動体は、前記通気孔を大気に開放する開放位置と、前記通気孔を閉塞する閉塞位置との間で移動可能に前記第１可動体に支持され、前記第２付勢部材によって前記閉塞位置から前記開放位置に向けて付勢されており、
    　前記第１可動体が前記非吸引位置に配置されている場合に、前記第２可動体は前記開放位置に配置されており、
    　前記第１可動体が前記吸引位置に配置されている場合に、前記第２可動体は前記開放位置若しくは前記閉塞位置又は前記開放位置と前記閉塞位置との間の中間位置に配置可能である内視鏡の吸引制御装置。     Housing,
    A first movable body housed movably in a housing hole formed in the housing;
    A second movable body movably supported by the first movable body;
    A first urging member for urging the first movable body,
    A second urging member for urging the second movable body,
    Equipped with
    The first movable body is
    A first connection hole communicating with the suction source,
    A second connection hole that is in communication with the first connection hole and that is in communication with the suction port of the endoscope;
    A ventilation hole communicating with the first connection hole;
    Have
    The first movable body has a suction position where the suction port of the endoscope communicates with the second connection hole, and a non-suction position where the communication between the suction port of the endoscope and the second connection hole is cut off. Is housed in the housing hole so as to be movable between and, and is biased by the first biasing member from the suction position toward the non-suction position,
    The second movable body is movably supported by the first movable body between an open position where the vent hole is opened to the atmosphere and a closed position where the vent hole is closed, and the second biasing member allows the second movable body to move. Urged from the closed position toward the open position,
    When the first movable body is arranged in the non-suction position, the second movable body is arranged in the open position,
    When the first movable body is arranged at the suction position, the second movable body can be arranged at the open position, the closed position, or an intermediate position between the open position and the closed position. Suction control device for endoscope.
  2. 　請求項１記載の内視鏡の吸引制御装置であって、
    　前記非吸引位置から前記吸引位置に向かう前記第１可動体の移動方向と、前記開放位置から前記閉塞位置に向かう前記第２可動体の移動方向とが同一方向であり、
    　前記第２付勢部材の付勢力は、前記第１付勢部材の付勢力よりも大きい内視鏡の吸引制御装置。     The suction control device for an endoscope according to claim 1, wherein
    The moving direction of the first movable body from the non-suction position to the suction position and the moving direction of the second movable body from the open position to the closed position are the same direction,
    The endoscope suction control device, wherein the urging force of the second urging member is larger than the urging force of the first urging member.
  3. 　請求項１記載の内視鏡の吸引制御装置であって、
    　前記非吸引位置から前記吸引位置に向かう前記第１可動体の移動方向と、前記開放位置から前記閉塞位置に向かう前記第２可動体の移動方向とが交差している内視鏡の吸引制御装置。     The suction control device for an endoscope according to claim 1, wherein
    A suction control device for an endoscope in which a moving direction of the first movable body from the non-suction position to the suction position intersects with a moving direction of the second movable body from the open position to the closed position. ..
  4. 　請求項１から３のいずれか一項記載の内視鏡の吸引制御装置であって、
    　前記第１可動体は、
    　前記収容孔に押し込まれることによって前記非吸引位置から前記吸引位置に移動し、
    　前記非吸引位置において前記収容孔に収容される下部と、
    　前記非吸引位置において前記収容から突出し、且つ前記吸引位置において前記収容孔に収容される中間部と、
    　前記吸引位置において前記収容孔から突出する上部と、
    　を有し、
    　前記ハウジングは、前記吸引口に連通される吸引口側接続孔を有し、
    　前記吸引口側接続孔は、前記収容孔の内周面において、前記非吸引位置に配置されている前記第１可動体の前記下部及び前記吸引位置に配置されている前記第１可動体の前記中間部と対向する領域に開口しており、
    　前記第２接続孔は、前記中間部に設けられており、
    　前記通気孔は、前記上部に設けられている内視鏡の吸引制御装置。     The suction control device for an endoscope according to any one of claims 1 to 3,
    The first movable body is
    Moved from the non-suction position to the suction position by being pushed into the accommodation hole,
    A lower portion housed in the housing hole at the non-suction position,
    An intermediate portion projecting from the accommodation at the non-suction position and accommodated in the accommodation hole at the suction position;
    An upper portion protruding from the accommodation hole at the suction position,
    Have
    The housing has a suction port side connection hole communicating with the suction port,
    The suction port side connection hole is, on the inner peripheral surface of the accommodation hole, the lower portion of the first movable body arranged at the non-suction position and the first movable body arranged at the suction position. It has an opening in the area facing the middle part,
    The second connection hole is provided in the intermediate portion,
    The ventilation hole is a suction control device for an endoscope provided on the upper portion.
  5. 　請求項１から４のいずれか一項記載の内視鏡の吸引制御装置を操作部に備える内視鏡。
          An endoscope comprising an endoscope suction control device according to any one of claims 1 to 4 in an operation unit.
PCT/JP2020/004660 2019-02-08 2020-02-06 Suction control device for endoscope, and endoscope WO2020162565A1 (en)

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Cited By (1)

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