WO2019159591A1 - Endoscope - Google Patents

Endoscope Download PDF

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Publication number
WO2019159591A1
WO2019159591A1 PCT/JP2019/001275 JP2019001275W WO2019159591A1 WO 2019159591 A1 WO2019159591 A1 WO 2019159591A1 JP 2019001275 W JP2019001275 W JP 2019001275W WO 2019159591 A1 WO2019159591 A1 WO 2019159591A1
Authority
WO
WIPO (PCT)
Prior art keywords
lever
stand
upright
rotating shaft
seal member
Prior art date
Application number
PCT/JP2019/001275
Other languages
English (en)
Japanese (ja)
Inventor
森本　康彦
常夫 福澤
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 DE112019000825.0T priority Critical patent/DE112019000825T5/de
Priority to CN201980009015.5A priority patent/CN111629648B/zh
Priority to JP2020500338A priority patent/JP6859483B2/ja
Publication of WO2019159591A1 publication Critical patent/WO2019159591A1/fr

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Classifications

    • 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
    • A61B1/00064—Constructional details of the endoscope body
    • A61B1/00071—Insertion part of the endoscope body
    • A61B1/0008—Insertion part of the endoscope body characterised by distal tip features
    • A61B1/00098—Deflecting means for inserted tools
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
    • A61B8/12—Diagnosis using ultrasonic, sonic or infrasonic waves in body cavities or body tracts, e.g. by using catheters
    • 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
    • A61B1/018—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 for receiving instruments
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
    • A61B8/44—Constructional features of the ultrasonic, sonic or infrasonic diagnostic device

Definitions

  • the present invention relates to an endoscope including an upright that guides a treatment instrument derived from a distal end portion of an insertion portion.
  • an ultrasonic endoscope As an ultrasonic endoscope, an electronic scanning ultrasonic transducer is provided at the distal end of the insertion portion of the endoscope, and a treatment instrument outlet is disposed at the proximal end of the ultrasonic transducer at the distal end. It has been.
  • a puncture treatment tool led into the body through a treatment tool channel and a treatment tool outlet is used. The cells are collected by puncture.
  • the treatment tool standing mechanism is provided in the front-end
  • a mechanism including an erecting stand disposed in the erecting stand accommodation chamber, a rotating shaft, and an erecting stand erecting lever is well known (see Patent Document 1 to Patent Document 6). ).
  • the stand support chamber is formed on one side surface of the partition wall provided in the tip portion.
  • the rotation shaft is rotatably supported by a holding hole (through hole) of the partition wall.
  • a stand is connected to one end of the rotating shaft, and a stand stand lever is connected to the other end. For this reason, a partition is arrange
  • a lever housing chamber is formed on the other side surface of the partition wall for housing the upright stand erecting lever.
  • an O-ring (O-ring) or the like is disposed between the outer peripheral surface of the rotating shaft and the inner wall surface of the holding hole. Intrusion of blood, water, and the like from the stand storage chamber to the lever storage chamber is prevented.
  • an opening for replacement (removal) of an upright stand erecting lever and a seal member is provided in a part of the wall surface of the lever accommodating chamber, and this opening is made of metal.
  • the metal lid is covered with a resin-made outer lid that forms a part of the outer peripheral surface of the tip.
  • the metal lid is provided with a movement restricting surface that abuts on the rotation shaft and restricts the movement of the rotation shaft and the upright stand erecting lever toward the metal lid.
  • an opening for replacement of a stand stand up lever and a seal member is provided in a part of the wall surface of the lever housing chamber.
  • the opening is covered with a lid that forms part of the outer peripheral surface of the tip.
  • JP 2016-131578 A Japanese Patent No. 6138404 JP 2004-141315 A JP 2010-201020 A Japanese Unexamined Patent Publication No. 2016-174817 Japanese Unexamined Patent Publication No. 2016-174818
  • an ultrasonic endoscope needs to be cleaned using a cleaning solution and a disinfecting solution every time it is used for various examinations and treatments.
  • the distal end portion provided with the treatment instrument stand-up mechanism is miniaturized and the shape thereof is complicated, so that the cleaning performance such as the wrapping of the cleaning liquid, the insertion property of the cleaning brush, and the draining performance can be improved and the cleaning operation can be performed. Ease is required.
  • the side surface on the partition wall side of the stand is in close contact with the partition wall, there is a possibility that the cleaning liquid or the like may not enter the side surface or the cleaning brush may not be applied. Therefore, it is preferable that a gap be formed between the side wall of the upright stand on the partition side and the partition wall.
  • FIG. 29 is an explanatory diagram for explaining the problem of the ultrasonic endoscope described in Patent Document 1.
  • reference numeral 502 denotes a distal end portion of the ultrasonic endoscope
  • reference numeral 504 denotes a partition wall
  • reference numeral 506 denotes a rotating shaft
  • reference numeral 508 denotes a stand
  • reference numeral 510 denotes a stand stand up lever.
  • reference numeral 514 is a lever accommodating chamber
  • reference numeral 516 is a metal lid
  • reference numeral 518 is a resin lid
  • reference numeral 520 is a seal member.
  • the opening of the lever housing chamber 514 is covered with a metal lid 516 and a resin lid 518. Further, in this ultrasonic endoscope, the metal lid 516 is brought into contact with the connecting portion between the shaft center 506A of the rotating shaft 506 and the rotating shaft 506 of the upright stand raising lever 510. As a result, it is possible to improve the exchangeability of the stand upright lever 510 and the seal member 520 and to restrict the positions of the stand upright lever 510 and the rotating shaft 506.
  • the length of the stand up stand up lever 510 is based on the lever principle. It is necessary to lengthen LQ [length from a connection portion with an operation wire (not shown) to a connection portion with the rotation shaft 506 (shaft center 506A)].
  • LQ length from a connection portion with an operation wire (not shown) to a connection portion with the rotation shaft 506 (shaft center 506A).
  • the position of the shaft center 506A of the rotating shaft 506 is the lower side in the cross section of the tip end portion 502 in the figure. Sneak away. For this reason, the metal lid 516 cannot be brought into contact with the rotating shaft 506 or the like.
  • the present invention has been made in view of such circumstances, and it is possible to realize the position regulation of the stand upright lever and the rotary shaft, the improvement in the standup stand standing lever performance, and the reduction in the diameter of the tip. It is an object to provide a flexible endoscope.
  • An endoscope for achieving the object of the present invention is provided on an insertion portion having a distal end and a proximal end, an operation portion having an operation member provided on a proximal end side of the insertion portion, and provided on a distal end side of the insertion portion.
  • An upright stand assembly a rotary shaft rotatably supported by the upright stand assembly, an upright stand connected to one end of the rotary shaft and guiding a treatment instrument derived from the upright stand assembly, and a lever main body portion
  • An upright stand elevating lever having a lever base end portion provided on one end side of the lever main body portion and connected to the other end of the rotating shaft, and a lever tip end portion provided on the other end side of the lever main body portion;
  • a lever housing chamber provided in the stand assembly and rotatably receiving the stand stand up lever about the rotation axis, exposing the first lever side surface opposite to the rotation shaft side of the stand stand up lever.
  • Lever storage chamber with window and operation section And a distal end side coupling portion coupled to a lever distal end portion of the stand upright lever, and the rotating shaft is rotated via the stand upright lever by operation of the operation member.
  • An operation wire for raising the stand a partition that is a part of the stand assembly and is provided between the lever accommodating chamber and the stand, and has a holding hole that supports the rotary shaft, and the rotary shaft is inserted therethrough.
  • an annular seal member for maintaining airtightness between the outer peripheral surface of the rotating shaft and the inner wall surface of the holding hole, a lid for detachably covering the exposure window, and a side surface of the lever main body portion in the first lever side surface.
  • a first restricting portion provided on at least one of the side surface of the main body and the inner surface of the lid on the upright stand raising lever side of the lid, and is interposed between the side surface of the main body and the inner surface of the lid to rotate.
  • Standing stand upright in the first direction on the lid side in the direction parallel to the axis of the shaft Comprises a first regulating portion for regulating the bars of the displacement, the.
  • the partition wall includes a first storage chamber wall surface that constitutes a bottom surface of the lever storage chamber on the upright base side, and a holding hole is open.
  • the second restricting portion is provided on at least one of the second lever side surface on the rotating shaft side and the first storage chamber wall surface, and is interposed between the second lever side surface and the first storage chamber wall surface.
  • the 2nd control part which controls the displacement of the stand stand raising lever to the 2nd direction on the opposite side to the 1st direction is provided. Thereby, it is possible to prevent the upright stand raising lever and the rotary shaft from being displaced in the axial direction of the rotary shaft.
  • the exposure window exposes the rotation range of the stand upright lever that rotates about the rotation axis in the lever housing chamber.
  • the first restricting portion when the first restricting portion is provided on the inner surface of the lid, the first restricting portion is at least on the side surface of the main body portion of the stand upright lever that rotates about the rotation axis. It has a shape along a part of the rotation trajectory, and is interposed between the main body side surface and the inner surface of the lid at each rotation position of the stand upright lever. Thereby, the restriction
  • the partition wall includes a second storage chamber wall surface that forms a side surface of the lever storage chamber and is formed with a wire insertion hole through which the operation wire is inserted.
  • the insertion hole is viewed from the tip end side of the stand assembly, the center position of the wire insertion hole is shifted to the stand base side from the lever tip portion.
  • the seal member is disposed between the inner wall surface of the holding hole and the outer peripheral surface of the rotating shaft, and a part of the sealing member is the holding hole on the upright base side of the holding hole. It is exposed from the opening. Thereby, the penetration
  • a seal member is provided on the outer peripheral surface of the rotation shaft from the position on the stand upright lever side of the holding hole opening to the position on the stand base side of the holding hole opening. Is formed, and the seal member is in close contact with the first wall portion that is in close contact with the bottom surface of the seal member attachment groove, and the first groove wall surface on the upright side of the seal member attachment groove.
  • a second wall portion, a third wall portion having an intimate region in close contact with the inner wall surface of the holding hole, and an exposed region located closer to the upright base than the opening of the holding hole.
  • the seal member has elasticity, and the width of the first wall portion is formed to be longer than the width of the seal member mounting groove in the axial direction of the rotation shaft.
  • the member is attached to the seal member attachment groove in a state where the first wall portion is compressed in the axial direction of the rotation shaft.
  • the rotation shaft is configured to rotate between the first rotation shaft and the second rotation in the axial direction of the rotation shaft, with the second groove wall surface of the seal member mounting groove on the upright stand rising lever side as a boundary.
  • the first rotating shaft is connected to the upright stand erecting lever at one end, has the first connecting portion and the second groove wall surface at the other end, and the second rotating shaft is the upright stand at one end. Are connected, and the other end has a second connecting portion connected to the first connecting portion, a groove bottom surface, and a first groove wall surface.
  • one end of the rotating shaft is second than the holding hole opening on the upright base side of the holding hole.
  • the partition wall is provided with a holding hole opening and has an opposing wall surface facing the upright.
  • the seal member is disposed between the opposing wall surface and the upright, and the rotating shaft is inserted therethrough. And a fourth wall portion that is in close contact with the opposing wall surface, and a fifth wall portion that is in close contact with the side surface of the upright on the rotating shaft side.
  • an annular seal member mounting groove on which the seal member is fitted and a first groove wall surface on the upright side of the seal member mounting groove are configured on the outer peripheral surface of the rotating shaft.
  • the sealing member mounting groove is formed on the outer peripheral surface of the rotating shaft at a position closer to the upright stand rising lever side than the holding hole opening on the upright base side of the holding hole.
  • the part covers a part of the seal side surface facing the first groove wall surface of the seal member with the first groove wall surface.
  • a cut portion is provided on a part of the outer peripheral surface of the annular wall portion.
  • the diameter of the outer peripheral surface of the annular wall portion is smaller than the diameter of the outer peripheral surface of the seal member.
  • An endoscope according to another aspect of the present invention includes a lid airtight holding member that maintains airtightness between the exposure window and the lid.
  • the endoscope according to the present invention can realize the position regulation of the stand upright lever and the rotary shaft, the improvement in the standup performance of the stand upright stand lever, and the reduction in the diameter of the tip.
  • FIG. 6 is a cross-sectional view of a seal member according to Modification 1.
  • 10 is a cross-sectional view of an O-ring according to Modification 2.
  • FIG. 26 is a cross-sectional view of the annular wall portion taken along line 26-26 in FIG.
  • FIG. 1 is a schematic view of an ultrasonic inspection system 2 to which the endoscope of the present invention is applied.
  • an ultrasonic inspection system 2 includes an ultrasonic endoscope 10 that images a body cavity (lumen) of a subject, an ultrasonic processor device 12 that generates an ultrasonic image, and an endoscope.
  • An endoscopic processor device 14 that generates an image
  • a light source device 16 that supplies illumination light for illuminating the inside of the body cavity to the ultrasonic endoscope 10
  • a monitor 18 that displays the ultrasonic image and the endoscopic image. And comprising.
  • the ultrasonic endoscope 10 corresponds to the endoscope of the present invention, and includes an insertion unit 20, an operation unit 22, and a universal cord 24.
  • the insertion unit 20 is inserted into various body cavities.
  • the operation unit 22 is connected to the proximal end side of the insertion unit 20 and receives the operation of the operator.
  • the universal cord 24 has one end connected to the operation unit 22. Further, at the other end of the universal cord 24, an ultrasonic connector 27 connected to the ultrasonic processor device 12, an endoscope connector 28 connected to the endoscope processor device 14, and a light source device. 16 and a light source connector 30 connected to 16.
  • a water supply tank 118 is connected to the light source connector 30 via an air / water supply tube 32, and a suction pump 124 is connected via a suction tube 34.
  • the ultrasonic processor device 12 generates an ultrasonic image based on the ultrasonic detection signal output from the ultrasonic endoscope 10.
  • the endoscopic processor device 14 generates an endoscopic image based on the imaging signal output from the ultrasonic endoscope 10.
  • the light source device 16 is connected to the insertion portion 20, the operation portion 22, the universal cord 24, and an incident end of a light guide 128 (see FIG. 2) inserted through the light source connector 30.
  • the light source device 16 supplies illumination light to the incident end of the light guide 128. This illumination light is emitted from the light guide 128 to a site to be observed through a pair of illumination windows 90 (see FIG. 3) described later.
  • the monitor 18 is connected to both the ultrasonic processor device 12 and the endoscope processor device 14.
  • the monitor 18 generates an ultrasonic image generated by the ultrasonic processor device 12 and the endoscope processor device 14.
  • the displayed endoscopic image is displayed. Only one of these ultrasonic images and endoscope images can be selectively displayed, or both can be displayed simultaneously.
  • the operation unit 22 is provided with an air / water supply button 36 and a suction button 38, and a pair of angle knobs 42, an operation lever 43, a treatment instrument insertion port 44 such as a forceps port, and the like.
  • the insertion portion 20 has a distal end, a proximal end, and a longitudinal axis, and has a distal end portion 50, a bending portion 52, and a flexible portion 54 in order from the distal end side toward the proximal end side.
  • the tip portion 50 is formed of a hard member and is also referred to as a tip hard portion.
  • the distal end portion 50 is provided with an ultrasonic transducer 62 described later, and a balloon 64 covering the ultrasonic transducer 62 is detachably attached.
  • the bending portion 52 is connected to the proximal end side of the distal end portion 50, and the other end is connected to the distal end side of the flexible portion 54.
  • the bending portion 52 is configured to be freely bent and is remotely bent by turning the pair of angle knobs 42 described above. Thereby, the front-end
  • the soft portion 54 has a small diameter and a long length and is flexible, and connects the bending portion 52 and the operation portion 22.
  • FIG. 2 is a schematic view showing a pipe configuration of the ultrasonic endoscope 10. As shown in FIG. 2, a treatment instrument channel 100, an air / water supply conduit 102, and a balloon conduit 104 whose one end communicates with the internal space of the balloon 64 are provided inside the insertion portion 20 and the operation portion 22. ing.
  • One end of the treatment instrument channel 100 is connected to a treatment instrument outlet 94 (see FIG. 3) described later, and the other end is connected to a treatment instrument insertion port 44 of the operation unit 22. Further, a suction conduit 106 is branched from the treatment instrument channel 100, and the suction conduit 106 is connected to the suction button 38 of the operation unit 22.
  • One end of the air / water supply conduit 102 is connected to an air / water supply nozzle 92 (see FIG. 3) described later, and the other end is branched into an air supply conduit 108 and a water supply conduit 110.
  • the air supply conduit 108 and the water supply conduit 110 are connected to the air / water supply button 36 of the operation unit 22.
  • One end of the balloon conduit 104 is connected to a supply / exhaust port 70a (see FIG. 5) that is open at a position inside the balloon 64 in the outer peripheral surface of the distal end portion 50, and the other end is connected to the balloon water supply conduit 112. Branching to a balloon drain 114.
  • the balloon water supply pipeline 112 is connected to the air / water supply button 36, and the balloon drainage pipeline 114 is connected to the suction button 38.
  • the air / water supply button 36 includes an air supply line 108, a water supply line 110, and a balloon water supply line 112, one end of an air supply source line 116 leading to an air supply pump 129, and a water supply tank 118. One end of the water source pipeline 120 is connected.
  • the air supply pump 129 always operates during ultrasonic observation.
  • a branch line 122 is branched from the air supply source line 116, and this branch line 122 is connected to the inlet (on the liquid surface) of the water supply tank 118. Further, the other end of the water supply source line 120 is inserted into the water supply tank 118 (below the liquid level). Then, when the internal pressure of the water supply tank 118 rises due to air supply from the air supply pump 129 via the branch line 122, the water in the water supply tank 118 is supplied to the water supply source line 120.
  • the air / water supply button 36 As the air / water supply button 36, a known two-stage switching button is used.
  • the air / water supply button 36 is configured to cause leakage of air sent from the air supply source line 116, ejection of air from the air / water supply nozzle 92, and water from the air / water supply nozzle 92 according to the operation of the operator. Switching between jetting and water feeding into the balloon 64 is performed.
  • description is abbreviate
  • one end of the suction source conduit 126 is connected to the suction button 38.
  • a suction pump 124 is connected to the other end of the suction source line 126. The suction pump 124 is always operated during the ultrasonic observation.
  • the suction button 38 is a two-stage switchable button, similar to the air / water supply button 36.
  • the suction button 38 is connected to the outside (atmosphere) in accordance with the operation of the operator, suction of various aspirates from the treatment instrument outlet 94 (see FIG. 3), and the inside of the balloon 64. Switch between draining water.
  • description is abbreviate
  • the operation lever 43 of the operation unit 22 is used for changing the derivation direction of the treatment instrument derived from the treatment instrument derivation port 94 (see FIG. 3).
  • FIG. 3 is an external perspective view of the distal end portion 50 of the insertion portion 20.
  • FIG. 4 is a left side view when the distal end portion 50 of the insertion portion 20 is viewed from the distal end side.
  • FIG. 5 is a right side view when the distal end portion 50 of the insertion portion 20 is viewed from the distal end side.
  • FIG. 6 is an exploded perspective view of the distal end portion 50 of the insertion portion 20. 3 and 6, the balloon 64 is not shown. In FIG. 6, illustration of the light guide 128 and an endoscope observation unit 80 described later is omitted.
  • the distal end portion 50 includes an ultrasonic observation unit 60 that acquires an ultrasonic detection signal from the distal end side toward the proximal end side, and an endoscope observation that acquires an imaging signal.
  • a portion 80 is provided.
  • the distal end portion 50 is provided with an upright table 96 between the ultrasonic observation portion 60 and the endoscope observation portion 80 that can change the direction in which the treatment instrument is led out.
  • the distal end portion 50 includes a balloon 64, a housing member 72 (also referred to as an exterior member or a case), a lever storage lid 76, and an upright stand assembly 200 (see FIG. 6).
  • the ultrasonic observation unit 60 includes an ultrasonic transducer 62 composed of a plurality of ultrasonic transducers. Each ultrasonic transducer of the ultrasonic transducer 62 is sequentially driven based on a drive signal input from the ultrasonic processor device 12. Thereby, each ultrasonic transducer sequentially generates ultrasonic waves toward the observation site and receives ultrasonic echoes (echo signals) reflected from the observation site. Each ultrasonic transducer transmits an ultrasonic detection signal (electric signal) corresponding to the received ultrasonic echo through a signal cable (not shown) inserted into the insertion unit 20 and the universal cord 24 and the like. Output to the ultrasonic processor unit 12. As a result, an ultrasonic image is generated by the ultrasonic processor device 12.
  • the balloon 64 is attached to the housing member 72 of the distal end portion 50 in order to prevent attenuation of ultrasonic waves and ultrasonic echoes, and is formed in a bag shape that covers the ultrasonic transducer 62.
  • the balloon 64 is formed of a stretchable elastic material such as latex rubber, for example, and a retractable locking ring 66 is provided at an opening end thereof.
  • a locking groove 68 is provided between the ultrasonic observation unit 60 and the stand 96 at the tip 50 over the entire circumference of the tip 50 in the circumferential direction. Then, the balloon 64 is detachably attached to the distal end portion 50 by fitting the locking ring 66 into the locking groove 68.
  • the balloon 64 is inserted into the body cavity in a contracted state so as to be in close contact with the outer wall surface of the housing member 72 of the distal end portion 50.
  • water deaerated water or the like
  • the balloon 64 is inflated until it comes into contact with the inner wall of the body cavity.
  • the balloon 64 contracts in the same manner as when the insertion portion 20 is inserted into the body cavity by discharging the water inside the balloon 64 according to the operation of the suction button 38. .
  • the endoscope observation part 80 is provided on the slope part 86 of the housing member 72 of the tip part 50.
  • the slope portion 86 is provided at a position on the proximal end side of a treatment instrument outlet 94 described later in the distal end portion 50 and is formed obliquely with respect to the axial direction of the distal end portion 50.
  • the endoscope observation unit 80 includes an observation unit and an illumination unit.
  • the observation part of the endoscope observation part 80 has an observation window 88 (see FIG. 3). Although not shown, behind the observation window 88, an objective lens of the observation optical system, and a CCD (Charge-Coupled Device) type or a CMOS (Complementary Metal-Oxide Semiconductor) type arranged at the imaging position of the objective lens. The image pickup device and the like are arranged. The imaging device captures an observation image captured from the observation window 88. Then, the imaging element outputs the imaging signal of the observation image to the endoscope processor device 14 via a signal cable (not shown) inserted through the insertion unit 20 and the universal cord 24. As a result, an endoscope image is generated by the endoscope processor device 14.
  • a signal cable not shown
  • the illumination unit of the endoscope observation unit 80 has a pair of illumination windows 90 (see FIG. 3), and the exit ends of the light guides 128 described above are arranged behind the illumination windows 90, respectively. Yes. Therefore, by connecting the light source connector 30 to the light source device 16 as shown in FIG. 2 described above, the illumination light emitted from the light source device 16 is guided to each illumination window 90 via the light guide 128, The light is emitted forward from each illumination window 90.
  • an air / water supply nozzle 92 is provided on the slope 86 in the vicinity of the observation window 88.
  • the air / water supply nozzle 92 is connected to one end of the air / water supply pipe line 102 shown in FIG. 2 described above, and is directed toward the observation window 88 in order to clean the foreign matter adhering to the surface of the observation window 88. Spout water or air.
  • the housing member 72 holds or stores each part of the ultrasonic observation unit 60 and the endoscope observation unit 80 described above, and an upright stand 96 and an upright stand assembly 200 described later.
  • a portion of the housing member 72 that is closer to the proximal end than the ultrasonic observation unit 60 is divided into two in the vertical direction in the figure with a plane parallel to the axial direction of the distal end portion 50 as a boundary. That is, the housing member 72 has a structure in which a first housing member 72a located on the lower side in the drawing and a second housing member 72b located on the upper side in the drawing are connected. And the stand 96 and the stand assembly 200 are accommodated between the 1st housing member 72a and the 2nd housing member 72b.
  • the first housing member 72 a holds the ultrasonic observation unit 60 and has a locking groove 68. Further, when the distal end portion 50 is viewed from the distal end side, on the right side surface of the first housing member 72a (see FIG. 5) and on the distal end side with respect to the locking groove 68, the axial direction of the distal end portion 50 is provided. A groove 74 is formed along. The groove 74 is formed so that at least a part thereof overlaps the ultrasonic transducer 62 in the axial direction of the tip 50.
  • a supply / discharge port 70a which is an opening on the distal end side of the balloon conduit 104 shown in FIG.
  • water can be supplied to the inside of the balloon 64 through the supply / discharge port 70a, or the water inside the balloon 64 can be discharged.
  • the second housing member 72b holds the endoscope observation part 80 and has a sloped part 86.
  • a treatment instrument outlet 94 for guiding the treatment instrument is formed on the upper surface of the second housing member 72b in the drawing at a position closer to the distal end than the endoscope observation section 80 (slope section 86).
  • the stand support chamber 94a which is the space which stores the stand 96 is formed.
  • both the first housing member 72a and the second housing member 72b have a partition wall 73 (see FIG. 6) that constitutes the right side surface of the stand support chamber 94a so as to straddle both. Reference) is formed. Further, both the first housing member 72a and the second housing member 72b are located on the left side surfaces of the upright stand assembly 200 at a position facing a later-described lever housing chamber 212 (see FIG. 6). A fitting hole 75 into which the lever storage lid 76 is fitted is formed.
  • the treatment instrument channel 100 shown in FIG. 2 described above is connected to the upright stand accommodating chamber 94a. For this reason, the treatment instrument inserted into the treatment instrument insertion port 44 is introduced into the body cavity from the treatment instrument outlet port 94 via the treatment instrument channel 100 and the upright storage chamber 94a.
  • the stand 96 is rotatably attached to the stand assembly 200 via a rotation shaft 216 (see FIG. 7) having a two-part structure described later in the stand storage chamber 94a.
  • the stand 96 changes the direction of the treatment tool guided from the treatment tool channel 100 into the stand support chamber 94 a and guides the treatment tool from the treatment tool outlet 94.
  • the stand 96 is rotated in the stand receiving chamber 94a in response to the operation of the operation lever 43, whereby the treatment instrument is introduced into the body cavity from the treatment instrument outlet 94. Is variable.
  • the lever storage lid 76 corresponds to the lid of the present invention, and constitutes a part of the outer peripheral surface of the housing member 72, that is, a part of the outer peripheral surface of the distal end portion 50.
  • the lever storage lid 76 is detachably attached to the stand assembly 200 with bolts 77 in a state of being fitted in the fitting hole 75 of the housing member 72.
  • the lid inner surface 244 (see FIG. 17) of the lever storage lid 76 on the upright assembly 200 side is provided with a lid seal member 76a and a first restricting portion 250 (see FIG. 17). ing.
  • the lever storage lid 76 is formed with an insertion hole 76b through which the bolt 77 is inserted.
  • FIG. 7 is an exploded perspective view of the stand assembly 200
  • FIG. 8 is a right side view of the stand assembly 200 when the tip 50 is viewed from the tip
  • FIG. It is a front view of the stand assembly 200 when viewed from the side.
  • the stand assembly 200 is made of, for example, a metal material having corrosion resistance, and includes a base 202 and a partition wall 204 extending from the base 202 to the tip side. And having. A part of the distal end surface of the base 202 constitutes a side surface on the proximal end side of the upright stand accommodating chamber 94a.
  • a communication hole 202 a that communicates with the treatment instrument channel 100 connected to the base end side is formed in the distal end surface of the base 202. As a result, the treatment instrument channel 100 and the upright storage chamber 94a are connected via the communication hole 202a.
  • the partition wall 204 includes a side wall surface 206 that is the left side surface when the upright assembly 200 is viewed from the front end side, and a facing wall surface 208 that is the right side surface opposite to the side wall surface 206 and faces the upright table 96. Have.
  • a lever housing chamber 212 for housing the upright stand upstanding lever 210 is formed on the side wall surface 206.
  • the partition wall 204 is provided between the upright stand 96 (the upright stand accommodating chamber 94a) and the upright stand upright lever 210 (the lever accommodating chamber 212).
  • the partition wall 204 includes a first storage chamber wall surface 212a that forms the bottom surface of the lever storage chamber 212 on the upstand 96 side, and a second storage chamber wall surface 212b that forms the side surface of the lever storage chamber 212 (see FIG. 7). .
  • a holding hole 214 is formed in the first storage chamber wall surface 212a so as to pass through the partition wall 204 along the axial direction of a later-described rotating shaft 216 that connects the stand 96 and the stand stand lever 210, and communicates with the stand storage chamber 94a. Is formed.
  • the holding hole 214 rotatably supports the rotating shaft 216. Since the upright stand upright lever 210 in the lever housing chamber 212 rotates (swings) about the rotation shaft 216, the lever housing chamber 212 is formed in a fan shape (fan shape) around the rotation shaft 216. Yes.
  • a wire insertion hole 224 (see FIG. 7) through which an operation wire 222 described later is inserted is formed in the second storage chamber wall surface 212b.
  • the side of the lever storage chamber 212 facing the lever storage lid 76 is open.
  • the lever accommodating chamber 212 has an exposure window 218 (see FIG. 7) formed by an edge portion of the second accommodating chamber wall surface 212b on the lever accommodating lid 76 side, which will be described later in detail.
  • the exposure window 218 exposes the upright stand erecting lever 210 in the lever accommodating chamber 212.
  • the bolt 77 described above is screwed into a peripheral area of the lever housing chamber 212 in the side wall surface 206, that is, an area different from the formation area of the lever housing chamber 212 and covered with the lever housing lid 76.
  • a bolt hole 220 is formed.
  • the numbers of bolts 77 and bolt holes 220 are not particularly limited.
  • the opposing wall surface 208 constitutes the left side surface of the upright stand accommodating chamber 94a when the upright stand assembly 200 is viewed from the front end side.
  • a holding hole opening 214 a (see FIG. 8) that is an opening on the upright base 96 side of the holding hole 214 is formed in the facing wall surface 208.
  • the opposed wall surface 208 is formed with a notch 208 a into which a part of the upright stand 96 enters.
  • the notch 208 a has a shape that does not hinder the rotation of the upright 96 around the rotation shaft 216.
  • a stand 96 is connected to one end of the stand stand lever 210 via a rotating shaft 216 having a two-part structure, which will be described later.
  • the rotary shaft 216 having a two-part structure with the bolt 211
  • the upright stand rising lever 210 and the upright stand 96 are connected via the rotary shaft 216 (see FIG. 7).
  • the upright stand raising lever 210 rotates (swings) integrally with the upright stand 96 around the rotation shaft 216.
  • an operation wire 222 (see FIG. 6) is connected to the other end side of the upright stand raising lever 210.
  • the operation wire 222 has a distal end side coupling portion 222a (see FIG. 6) that is coupled to the upright stand erecting lever 210 in the lever accommodating chamber 212 on the distal end side.
  • the operation wire 222 has a base end side that is connected to a stand operating mechanism 226 (see FIG. 10) in the operation unit 22 through the insertion portion 20 from the wire insertion hole 224 of the lever housing chamber 212.
  • FIG. 10 is a schematic view showing an example of the upright stand operating mechanism 226.
  • the operation wire 222 has a base end side connecting portion 222 b that is connected to the stand operating mechanism 226 on the base end side.
  • the stand operating mechanism 226 includes an operating lever 43 corresponding to the operating member of the present invention, a rotating drum 226A to which the operating lever 43 is coupled and rotatable within a certain angle range, and a crank member 226B coupled to the rotating drum 226A. And a slider 226C coupled to the crank member 226B.
  • the proximal end side connecting part 222b is connected to the slider 226C.
  • the operation lever 43 When the operation lever 43 is operated to rotate the rotating drum 226A, the operation wire 222 is pushed and pulled through the crank member 226B and the slider 226C, so that the upright stand rising lever 210 is swung. In response to the swing of 210, the stand 96 rotates (swings) about the rotation shaft 216.
  • FIG. 11 is an explanatory diagram for explaining the rotation of the stand 96 according to the operation of the operation lever 43.
  • reference numeral XIA in FIG. 11, when the operation lever 43 is operated to rotate the rotating drum 226 ⁇ / b> A in one direction, the operation wire 222 is pushed, so that the upright stand elevating lever 210 is centered on the rotation shaft 216. The stand 96 rotates in the R1 direction and falls.
  • the operation lever 43 is operated to rotate the rotating drum 226A in the reverse direction as indicated by reference numeral XIB, the operation wire 222 is pulled, and the upright stand elevating lever 210 is moved around the rotation shaft 216 in the R1 direction. Rotates in the opposite R2 direction, and the stand 96 stands up.
  • the operation wire 222 can displace (stand up and fall) the stand 96 by rotating the rotating shaft 216 via the stand stand up lever 210 by operating the operation lever 43.
  • FIG. 12 is an external perspective view of the stand 96.
  • the stand 96 has an arcuate guide surface 96 a whose surface facing the communication hole 202 a guides the treatment tool guided into the stand storage chamber 94 a toward the treatment tool outlet 94. It becomes.
  • an upright stand rotating shaft 216a that constitutes a part of the rotating shaft 216 and corresponds to the second rotating shaft of the present invention is connected (including integrally formed) to the base end portion of the upright stand 96.
  • the connection method of the stand 96 and the stand rotating shaft 216a is not specifically limited, Furthermore, both may not be integrally formed but a separate body may be sufficient.
  • the upright stand rotating shaft 216a is inserted into the holding hole 214 from the upright stand accommodating chamber 94a side.
  • One end of the upright rotating shaft 216a is connected to the base end of the upright 96 as described above, and the other end has a connecting portion 230a corresponding to the second connecting portion of the present invention.
  • the connecting portion 230 a has an axial shape that protrudes toward the upright stand erecting lever 210 along the axial direction of the rotating shaft 216.
  • a screw hole 232 into which the tip of the bolt 211 shown in FIG. 7 or the like described above is screwed is formed in the upright stand rotating shaft 216a (connecting portion 230a). Further, a first groove wall surface 234a and a groove bottom surface 234b constituting a part of a later-described seal member mounting groove 234 (see FIG. 15) are formed on the outer peripheral surface on the other end side of the upright stand rotating shaft 216a. .
  • FIG. 13 is an external perspective view of the upright stand elevating lever 210 as viewed from the lever storage lid 76 side.
  • FIG. 14 is an external perspective view of the upright stand elevating lever 210 as seen from the upright stand 96 side.
  • the upright stand elevating lever 210 has a lever main body portion 210 a, a lever base end portion 210 b, and a lever tip end portion 210 c.
  • the side surface of the upright stand upright lever 210 on the side facing the lever storage lid 76 is defined as a first lever side surface 246.
  • the side surface of the lever main body portion 210a in the first lever side surface 246 is referred to as a main body side surface 246a.
  • a side surface of the upright stand elevating lever 210 opposite to the first lever side surface 246 (the rotating shaft side of the present invention) is defined as a second lever side surface 248.
  • the lever base end portion 210b is provided on one end side of the lever main body portion 210a.
  • the lever base end portion 210b is connected to an upright lever rotating shaft 216b that constitutes a part of the rotating shaft 216 and corresponds to the first rotating shaft of the present invention.
  • the connection method of the upright lever rotating shaft 216b and the lever base end portion 210b is not particularly limited, and the both may not be integrally formed but may be formed separately.
  • the lever tip portion 210c is provided on the other end side of the lever main body portion 210a and has a wire connecting portion 235.
  • the wire connecting portion 235 is connected to the distal end side connecting portion 222a of the operation wire 222 described above.
  • the upright lever rotating shaft 216b is inserted into the holding hole 214 from the lever housing chamber 212 side. One end of the upright lever rotating shaft 216b is connected to the lever base end portion 210b of the upright stand upright lever 210 as described above. At this time, when the stand assembly 200 is viewed from the front end side thereof as shown in FIG. 17 described later, the stand lever rotating shaft 216b is closer to the stand 96 side than the stand stand up lever 210 (in FIG. 17 described later). It is provided at a position retracted in the second direction DR side. Accordingly, as described with reference to FIG.
  • the upright lever rotating shaft 216b is placed on the inner peripheral surface of the tip 50. Since it becomes difficult to interfere, the increase in the diameter of the front-end
  • the upright lever rotating shaft 216b has a connecting portion 230b corresponding to the first connecting portion of the present invention at the other end.
  • the connecting portion 230b is provided on the end surface on the other end side of the upright lever rotating shaft 216b (opposing surface facing the upright stand rotating shaft 216a), and is a fitting hole into which the above-described connecting portion 230a is fitted. .
  • the upright lever rotating shaft 216b is formed with an insertion hole 236 through which the bolt 211 shown in FIG. Furthermore, the end face on the other end side of the upright lever rotating shaft 216b and the outer peripheral portion of the connecting portion 230b serve as a second groove wall surface 234c constituting a part of a seal member mounting groove 234 (see FIG. 15) described later. Function.
  • FIG. 15 is an explanatory diagram for explaining a connection state between the upright stand rotating shaft 216a and the upright lever rotating shaft 216b.
  • the connecting portion 230a of the upright stand rotating shaft 216a and the connecting portion 230b of the upright lever rotating shaft 216b are connected in the holding hole 214 shown in FIG.
  • the connecting portions 230a and 230b have a shape in which the upright stand rotating shaft 216a and the upright lever rotating shaft 216b are connected to each other so as not to be relatively rotatable.
  • the shape of the connection parts 230a and 230b is not limited to the shape shown in each figure, You may change suitably.
  • the bolt 211 is inserted into the insertion hole 236 from one end side of the upright lever rotating shaft 216b in a state where the connecting portions 230a and 230b are connected, and then screwed into the screw hole 232 of the upright base rotating shaft 216a.
  • the stand 96, the stand stand lever 210, and the rotating shaft 216 are integrated.
  • the stand 96 and the stand stand lever 210 rotate (oscillate) integrally around the rotation shaft 216 (the stand turn shaft 216a and the stand lever turn shaft 216b).
  • the first groove wall surface 234a, the groove bottom surface 234b, and the second groove wall surface are formed on the outer peripheral surface of the rotating shaft 216 along the circumferential direction thereof.
  • 234c forms an annular seal member mounting groove 234.
  • the rotating shaft 216 has the second groove wall surface 234c on the first direction DL side of the seal member mounting groove 234 (see FIG. 17, corresponding to the upright stand rising lever side of the present invention) as a boundary, and the upright rotating shaft 216a.
  • the upright lever rotating shaft 216b A seal member 256 described later is attached to the seal member attachment groove 234 (see FIG. 17).
  • FIG. 16 is an explanatory diagram for explaining the exposure window 218 and the lever storage lid 76 of the lever storage chamber 212.
  • the upright stand raising lever 210 rotates (swings) around the rotation shaft 216 in the lever housing chamber 212.
  • the exposure window 218 has a shape that exposes the rotation range of the upright stand elevating lever 210 that rotates about the rotation axis 216. Therefore, the exposure window 218 can expose the first lever side surface 246 of the upright stand upright lever 210 at each rotational position of the upright stand upright lever 210.
  • the lever storage lid 76 is fitted in the fitting hole 75 of the housing member 72 and covers at least the exposure window 218 of the lever storage chamber 212.
  • the lever storage lid 76 is configured such that the bolt 77 is screwed into the bolt hole 220 of the upright base assembly 200 through the insertion hole 76 b or the bolt 77 is removed from the bolt hole 220, thereby exposing the exposure window 218 (lever storage chamber 212). Cover detachably.
  • the lever By removing the storage lid 76 from the stand assembly 200, the exposure window 218 (lever storage chamber 212) can be exposed. As a result, it is possible to easily replace or clean the stand raising lever 210 of the ultrasonic endoscope 10 and a seal member 256 (see FIG. 17) described later.
  • the lever storage lid 76 is attached to the upright base assembly 200 (the fitting hole 75 of the housing member 72) using the bolt 77, but an attachment method other than the bolt 77 may be adopted.
  • the lid seal member 76a corresponds to the lid hermetic holding member of the present invention, and is formed of an elastic material such as rubber, for example.
  • the lid seal member 76a is provided along the edge of the lid inner surface 244 (see FIG. 17) of the lever storage lid 76, for example, and has a substantially frame shape. Then, when the lever storage lid 76 is attached to the stand assembly 200, the lid seal member 76a is brought into pressure contact with the side wall surface 206 (periphery portion of the exposure window 218) of the stand assembly 200. Thereby, airtightness between the lever storage lid 76 and the exposure window 218 (lever storage chamber 212) is maintained.
  • the position where the lid seal member 76a is provided on the lid inner surface 244 (see FIG. 17) and the shape of the lid seal member 76a are particularly limited. It is not something. Further, instead of providing the lid seal member 76 a on the lid inner surface 244, a lid airtight holding member such as the lid seal member 76 a may be provided on the side wall surface 206 of the stand assembly 200, or the lever storage lid 76 and the stand assembly 200. A sealing material (lid tightness holding member) may be applied to the joint surface.
  • FIG. 17 is a cross-sectional view of the stand 96, the stand stand lever 210, and the rotating shaft 216 inserted through the holding hole 214.
  • the operation wire 222 is not shown.
  • the direction from the upright 96 to the upright stand up lever 210 is defined as a first direction DL, and the direction opposite to the first direction DL is the second direction. Let it be DR.
  • the first restricting portion 250 provided on the lid inner surface 244 of the lever storage lid 76 regulates the displacement of the upright stand upright lever 210 and the like in the first direction DL, and the first in the lever housing chamber 212.
  • the displacement in the second direction DR of the erection stand erecting lever 210 and the like is regulated by the second regulating portion 252 provided on the storage chamber wall surface 212a.
  • FIG. 18 is an enlarged view of the lid inner surface 244 of the lever storage lid 76. As shown in FIG. 18 and FIG. 17 described above, the first restricting portion 250 is provided in the lid inner surface 244 at a position facing the body side surface 246a of the lever body 210a of the upright stand erecting lever 210. .
  • the first restricting portion 250 may be formed of the same material as the lever storage lid 76, or may be formed of different materials (such as an elastic material and a low friction material). For example, when viewed from the front end side of the stand assembly 200 (see FIG. 17), the first restricting portion 250 has a shape protruding from the lid inner surface 244 in the second direction DR. Specifically, when the lever storage lid 76 is attached to the upright assembly 200, the first restricting portion 250 protrudes close to or abuts against the main body side surface 246a of the upright stand upright lever 210 in the lever storage chamber 212. Has been adjusted.
  • the first restricting portion 250 has the R1 direction and the R2 direction (see FIG. 11) described above around the rotation shaft 216.
  • the main body side surface 246a of the upright stand elevating lever 210 has a shape along a rotation locus. Accordingly, the first restricting portion 250 approaches or abuts against the main body side surface 246a of the upright stand upright lever 210 at each rotation position of the upright stand upright lever 210 that rotates about the rotation shaft 216.
  • the first restricting portion 250 is interposed between the main body side surface 246a and the lid inner surface 244 at each rotation position of the stand upright lever 210, whereby the stand upright standup lever 210 and the like in the first direction DL. Displacement (displacement toward the lever storage lid 76) can be restricted.
  • FIG. 19 is an enlarged view of the lever tip portion 210c (wire connecting portion 235) and the wire insertion hole 224 in FIG.
  • the center position CH of the wire insertion hole 224 is shown in the figure.
  • the formation position of the wire insertion hole 224 in the second storage chamber wall surface 212b is adjusted so as to shift to the second direction DR side (the standing base side of the present invention) from the position of the lever tip portion 210c indicated by the straight line LT. ing.
  • the second restricting portion 252 is provided at a position facing the second lever side surface 248 of the upright stand erecting lever 210 (lever body portion 210 a) in the first accommodating chamber wall surface 212 a of the lever accommodating chamber 212. It has been.
  • the 2nd control part 252 may be formed with the same material as the partition 204, or may be formed with a different material (an elastic material, a low friction material, etc.).
  • the second restricting portion 252 when viewed from the front end side of the stand assembly 200, the second restricting portion 252 has a shape protruding from the first storage chamber wall surface 212a in the first direction DL. Specifically, the second restricting portion 252 is adjusted to a protruding amount that comes close to or comes into contact with the upright stand erecting lever 210 (lever main body portion 210a) in the lever accommodating chamber 212.
  • the second restricting portion 252 has a second lever side surface 248 of the upright stand erecting lever 210 that rotates around the rotation shaft 216 when the first storage chamber wall surface 212a is viewed from the front side. It has a shape along at least a part of the trajectory. As a result, the second restricting portion 252 also approaches or comes into contact with the upright stand upright lever 210 (main body side surface 246a) at each rotation position of the upright stand upright lever 210 that rotates about the rotation shaft 216.
  • the second restricting portion 252 is interposed between the second lever side surface 248 and the first storage chamber wall surface 212a at each rotational position of the upright stand upright lever 210, the second direction of the upright stand upright lever 210 and the like.
  • the displacement to DR can be regulated.
  • FIG. 20 is an enlarged view of the rotating shaft 216 and the seal member 256 in FIG.
  • an annular seal member mounting groove 234 composed of a first groove wall surface 234a, a groove bottom surface 234b, and a second groove wall surface 234c is formed on the outer peripheral surface of the rotating shaft 216. It is formed.
  • the seal member mounting groove 234 is more first than the holding hole opening 214a of the holding hole 214 described above in a state in which the position of the upright stand raising lever 210 and the like is restricted by the first restricting portion 250 and the second restricting portion 252.
  • the seal member 256 is inserted with the rotary shaft 216 and maintains airtightness between the outer peripheral surface of the rotary shaft 216 and the inner wall surface of the holding hole 214.
  • the end of the sealing member 256 on the second direction DR side is exposed (protruded) from the holding hole opening 214a of the holding hole 214 to the second direction DR side. For this reason, even when a liquid such as blood or water (hereinafter simply referred to as a liquid) enters the upright storage chamber 94a, the space between the outer peripheral surface of the rotating shaft 216 and the inner wall surface of the holding hole 214 is reached. Intrusion of the liquid can be prevented by the seal member 256.
  • the seal member 256 has a so-called oil seal structure, and includes a first wall portion 256a, a second wall portion 256b, a third wall portion 256c, and a compression spring 256d, each of which is formed in an annular shape. .
  • the first wall portion 256a, the second wall portion 256b, and the third wall portion 256c are integrally formed of, for example, a resin material having a low friction coefficient.
  • the first wall portion 256a has a known lip portion (for example, a dust lip portion, a lip tip portion, and a seal lip portion) (not shown), and is in close contact with the groove bottom surface 234b of the seal member mounting groove 234.
  • the second wall portion 256b is a known back face and is in close contact with the first groove wall surface 234a of the seal member mounting groove 234.
  • the third wall portion 256c is a well-known fitting portion, and is in close contact with the inner wall surface of the holding hole 214 in the second direction DR (that is, the stand support chamber 94a) from the holding hole opening 214a of the holding hole 214. And an exposed region U2 located in the inner).
  • the compression spring 256d is provided between the first wall portion 256a and the third wall portion 256c.
  • the compression spring 256d is a biasing member that biases one of the first wall 256a and the third wall 256c in a direction away from the other. Accordingly, the first wall portion 256a can be pressed against the groove bottom surface 234b, and the third wall portion 256c can be pressed against the inner wall surface of the holding hole 214, so that the sealing function of the seal member 256 can be enhanced.
  • An urging member other than the compression spring 256d may be used, or an elastic member such as rubber may be used instead of the urging member.
  • FIG. 21 is an enlarged view of the first wall portion 256a of the seal member 256.
  • the width W1 of the first wall portion 256a is formed to be longer than the width W2 of the groove bottom surface 234b of the seal member mounting groove 234 in the axial direction of the rotation shaft 216.
  • the first wall portion 256a of the seal member 256 is compressed in the axial direction of the rotary shaft 216 after the riser rotary shaft 216a and the upright lever rotary shaft 216b are connected. In this state, it is mounted in the seal member mounting groove 234. Accordingly, the second wall portion 256b of the seal member 256 is pressed against the first groove wall surface 234a of the seal member mounting groove 234 by the elastic restoring force of the first wall portion 256a. As a result, the sealing function of the sealing member 256 can be enhanced.
  • the third wall portion 256c of the seal member 256 has higher durability (high rigidity) than the first wall portion 256a and the second wall portion 256b. For this reason, even if the seal member 256 rotates integrally with the rotating shaft 216, the third wall portion 256c is in sliding contact with the inner wall surface of the holding hole 214 (particularly the edge portion of the holding hole opening 214a). Breakage and deterioration of the wall portion 256c are prevented. That is, in general O-rings and packings, there is a risk of cutting or twisting when stress is applied by sliding contact with the inner wall surface of the holding hole 214, but such a problem occurs in the seal member 256. Is suppressed. Further, the third wall portion 256c may be formed so that the width in the axial direction of the rotating shaft 216 is longer than the width W2 of the groove bottom surface 234b, similarly to the first wall portion 256a.
  • the cleaning liquid such as the exposed portion U2 of the second wall portion 256b and the exposed region U2 of the third wall portion 256c easily flows around, and the cleaning brush. It is only necessary to clean a portion where it can be easily applied, improving the cleaning performance and facilitating the cleaning operation.
  • the first restricting portion 250 is provided with the lever so that the first restriction portion 250 is interposed between the main body side surface 246a and the lid inner surface 244 at each rotation position of the upright stand erecting lever 210. It is provided on the lid inner surface 244 of the storage lid 76.
  • the displacement in the first direction DL of the upright stand erecting lever 210 and the like can be regulated by the 1 regulating unit 250. As a result, it is possible to restrict displacement of the upright stand upright lever 210 and the like in the first direction DL, improve the upright performance of the upright stand upright lever 210, and reduce the diameter of the tip 50.
  • the displacement of the upright stand erecting lever 210 and the like in the second direction DR is also regulated.
  • both side surfaces of the stand 96 on the first direction DL side and the second direction DR side and the stand support chamber 94a Even when a gap is secured between the wall surface and the wall surface, it is possible to prevent the upright stand elevating lever 210 and the like from being displaced in the axial direction of the rotating shaft 216.
  • the seal member mounting groove 234 is configured so that the seal member 256 configured to be in close contact (pressure contact) with the first groove wall surface 234 a and the groove bottom surface 234 b of the seal member mounting groove 234 and the inner wall surface of the holding hole 214. Therefore, the airtightness between the outer peripheral surface of the rotating shaft 216 and the inner wall surface of the holding hole 214 can be reliably held.
  • FIG. 22 is an explanatory diagram for describing a modification of the first restricting portion 250 and the second restricting portion 252.
  • the first restricting portion 250 is provided on the inner surface 244 of the lever accommodating lid 76
  • the second restricting portion 252 is provided on the first accommodating chamber wall surface 212 a of the lever accommodating chamber 212.
  • the first restricting portion 250 may be provided on the side surface 246a of the main body portion of the upright stand upright lever 210.
  • the first restricting portion 250 is adjusted to a protruding amount that approaches or comes into contact with the lid inner surface 244.
  • the 1st control part 250 is interposed between the main-body-part side surface 246a and the lid
  • the second restricting portion 252 may be provided on the second lever side surface 248 of the upright stand erecting lever 210.
  • the second restricting portion 252 is adjusted to a protruding amount that comes close to or comes into contact with the first storage chamber wall surface 212 a of the lever storage chamber 212.
  • the second restricting portion 252 is formed between the second lever side surface 248 and the first storage chamber wall surface 212a at each rotation position of the upright stand erecting lever 210 that rotates about the rotation shaft 216, as in the above embodiment. Since it is interposed, the displacement of the upright stand elevating lever 210 and the like in the second direction DR can be restricted.
  • the first restricting portion 250 is divided into two in the axial direction of the rotation shaft 216, and one of the two divided first restricting portions 250 is provided on the lid inner surface 244, and the other is provided on the main body side surface 246a. It may be provided. Then, at each rotational position of the upright stand upright lever 210, by adjusting both the positions etc. so that one and the other of the two divided first regulating portions 250 are close to or in contact with each other, the upright stand upright lever 210 etc. The displacement in the first direction DL can be restricted.
  • the second restricting portion 252 is divided into two in the axial direction of the rotating shaft 216, and one of the two divided second restricting portions 252 is provided on the first storage chamber wall surface 212 a and the other is provided on the second lever side surface 248. It may be provided. Then, at each rotational position of the upright stand upright lever 210, the position of the upright stand upright lever 210, etc. is adjusted by adjusting both the positions etc. so that one and the other of the second restricting portion 252 divided into two come close to or contact each other. The displacement in the second direction DR can be restricted.
  • FIG. 23 is a cross-sectional view of a seal member 260 of Modification 1 different from the seal member 256 of the above embodiment.
  • the seal member 256 is disposed between the outer peripheral surface of the rotating shaft 216 and the inner wall surface of the holding hole 214, but an annular seal member 260 is disposed between the partition wall 204 and the upright stand 96. May be.
  • the seal member 260 when the seal member 260 is disposed between the partition wall 204 and the stand 96, instead of forming the seal member mounting groove 234 on the outer peripheral surface of the rotary shaft 216, the rotary shaft 216 (stand base rotation One end of the shaft 216a) on the second direction DR side is extended to a position further away from the holding hole opening 214a of the holding hole 214 in the second direction DR. Thereby, a space in which the seal member 260 can be disposed is formed between the opposing wall surface 208 of the partition wall 204 and the upright stand 96.
  • the seal member 260 has an insertion hole 262 through which the rotation shaft 216 is inserted.
  • the diameter of the insertion hole 262 is larger than the diameter of the rotating shaft 216.
  • the seal member 260 has a so-called oil seal structure, and includes a fourth wall portion 260a, a fifth wall portion 260b, a sixth wall portion 260c, and a compression spring 260d, each of which is formed in an annular shape. Yes.
  • the 4th wall part 260a, the 5th wall part 260b, and the 6th wall part 260c are integrated.
  • the fourth wall portion 260a is one of a known lip portion and fitting portion, and is in close contact with the opposing wall surface 208 of the partition wall 204.
  • the fifth wall portion 260b is the other of the well-known lip portion and the fitting portion, and is in close contact with the side surface on the first direction DL side of the upright base 96 (the side surface connected to the rotation shaft 216).
  • the sixth wall portion 260 c is a known back face and constitutes the outer peripheral surface of the seal member 260.
  • the compression spring 260d is provided between the fourth wall portion 260a and the fifth wall portion 260b.
  • the compression spring 260d is an urging member that urges one of the fourth wall portion 260a and the fifth wall portion 260b in a direction away from the other.
  • the 4th wall part 260a can be press-contacted to the opposing wall surface 208
  • the 5th wall part 260b can be press-contacted to the side surface by the side of the 1st direction DL of the stand 96.
  • the seal member 260 can prevent the liquid from entering between the outer peripheral surface of the rotating shaft 216 and the inner wall surface of the holding hole 214, similarly to the seal member 256 of the above embodiment.
  • An urging member other than the compression spring 260d may be used, or an elastic member such as rubber may be used instead of the urging member.
  • FIG. 24 is a cross-sectional view of an O-ring 270 of Modification 2 different from the seal member 256 of the above embodiment.
  • FIG. 25 is an enlarged view of the O-ring 270 in FIG.
  • the seal member 256 is used as the seal member of the present invention, and the seal member 256 is exposed from the holding hole opening 214a to the second direction DR side.
  • annular O-ring 270 may be provided at a position on the one-direction DL side.
  • the seal member mounting groove 234 (the first groove wall surface 234a, the groove bottom surface 234b, and the second groove wall surface 234c) on the outer peripheral surface of the rotation shaft 216 is closer to the first direction DL side than the holding hole opening 214a (in the present invention). It is formed on the upright stand side).
  • An annular wall portion 272 that is an annular wall portion that constitutes is formed.
  • the O-ring 270 corresponds to the seal member of the present invention, and is disposed between the outer peripheral surface of the rotating shaft 216 and the inner wall surface of the holding hole 214 by being mounted in the seal member mounting groove 234. By this O-ring 270, airtightness between the outer peripheral surface of the rotating shaft 216 and the inner wall surface of the holding hole 214 is maintained.
  • FIG. 26 is a cross-sectional view of the annular wall portion 272 along the line 26-26 in FIG.
  • the annular wall portion 272 has a shape that covers a part of the seal side surface 270 a facing the first groove wall surface 234 a in the outer surface of the O-ring 270.
  • the annular wall portion 272 has a shape that exposes the other part (other than a part) of the seal side surface 270a into the upright stand accommodating chamber 94a through the holding hole opening 214a.
  • a plurality of D-cuts 272a (corresponding to the cut portion of the present invention) parallel to the axial direction of the rotation shaft 216 are formed on the outer peripheral surface of the annular wall portion 272 at equal angular intervals with respect to the center of the rotation shaft 216.
  • a gap 274 is formed between the inner wall surface of the holding hole 214 and the D cut 272a of the annular wall portion 272.
  • the annular wall portion 272 has an octagonal shape so that the cross-sectional shape of the outer peripheral surface of the annular wall portion 272, more specifically, the cross-sectional shape along the plane perpendicular to the axial direction of the rotating shaft 216 is an octagonal shape.
  • eight D cuts 272a are formed on the outer peripheral surface of 272
  • the number of D cuts 272a formed on the outer peripheral surface of the annular wall portion 272 may be seven or less or nine or more.
  • FIG. 27 is a cross-sectional view of a modified example of the annular wall portion 272 shown in FIG.
  • the diameter of the outer peripheral surface of the annular wall portion 272 may be smaller than the diameter of the rotating shaft 216.
  • the gap 274 is formed between the inner wall surface of the holding hole 214 and the outer peripheral surface of the annular wall portion 272, the cleaning performance of the seal side surface 270a of the O-ring 270 is improved and the cleaning operation is easy. Sex can be achieved.
  • the outer peripheral surface of the annular wall portion 272 may be formed in an arbitrary shape.
  • the sealing members 256 and 260 and the O-ring 270 have been described as examples of the sealing member of the present invention. However, airtightness between the outer peripheral surface of the rotating shaft 216 and the inner wall surface of the holding hole 214 is ensured. If it can do, the kind, shape, arrangement position, etc. of a sealing member will not be specifically limited.
  • the rotary shaft 216 has a structure divided into the upright base rotary shaft 216a and the upright lever rotary shaft 216b.
  • the rotary shaft 216 has a non-split structure as shown in FIG. May be.
  • the first regulating portion 250 is provided on the lid inner surface 244 of the lever storage lid 76 that constitutes a part of the outer peripheral surface of the distal end portion 50.
  • the ultrasonic endoscope 10 has been described as an example.
  • the present invention is also applied to an endoscope provided with a stand 96 for guiding a treatment instrument, for example, a side-view type endoscope such as a duodenoscope. can do.
  • FIG. 28 is an explanatory diagram of a first restricting portion 254 according to another embodiment provided on the lid inner surface 244 of the lever storage lid 76.
  • the first restricting portion 254 is provided on the lid inner surface 244 of the lever storage lid 76 at a position facing the rotation shaft 216 (stand-up lever rotation shaft 216b).
  • the first restricting portion 254 protrudes in the vicinity of or in contact with the end portion on the first direction DL side of the rotating shaft 216 (stand-up lever rotating shaft 216b). The amount is adjusted.
  • the first restricting portion 254 is interposed between the rotating shaft 216 and the lid inner surface 244 at each rotational position of the stand upright lever 210. Displacement in one direction DL can be regulated.
  • Ultrasonic Inspection System 10 Ultrasound Endoscope 12 Ultrasound Processor Device 14 Endoscope Processor Device 16 Light Source Device 18 Monitor 20 Insertion Unit 22 Operation Unit 24 Universal Code 27 Ultrasound Connector 28 Endoscope Connector 30 Light source connector 32 Tube 34 Tube 36 Air / water supply button 38 Suction button 42 Angle knob 43 Operation lever 44 Treatment instrument insertion port 50 Tip portion 52 Bending portion 54 Soft portion 60 Ultrasonic observation portion 62 Ultrasonic transducer 64 Balloon 66 Locking ring 68 Locking groove 70a Supply / exhaust port 72 Housing member 72a First housing member 72b Second housing member 73 Partition wall 74 Groove portion 75 Fitting hole 76 Lever storage cover 76a Cover seal member 76b Insertion hole 77 Bolt 77b Insertion hole 80 Endoscopic observation Part 86 Slope part 88 Observation window 90 Illumination window 92 Air supply / water supply nozzle 94 Treatment instrument outlet 94a Standing table accommodating chamber 96 Standing table 96a Guide surface 100 Treatment tool channel 102 Air supply / water supply

Abstract

La présente invention concerne un endoscope qui peut réguler les emplacements d'un levier de montage de support de montage et d'un arbre rotatif, améliorer les performances de montage du levier de montage de support de montage, et réduire le diamètre de l'extrémité distale de celui-ci. Cet endoscope est pourvu : d'une partie d'insertion ; d'une partie d'actionnement ; d'un ensemble support de montage ; d'un arbre rotatif ; d'un support de montage qui est relié à une extrémité de l'arbre rotatif et guide un outil chirurgical ; d'un levier de montage de support de montage ayant une partie de corps de levier, une partie d'extrémité de base de levier, et une partie d'extrémité distale de levier ; d'une chambre de réception de levier disposée dans l'ensemble support de montage, et ayant une fenêtre d'exposition qui expose une première surface latérale de levier du levier de montage de support de montage ; d'une paroi de séparation qui est disposée entre la chambre de réception de levier et le support de montage, et comporte un trou de maintien qui supporte l'arbre rotatif ; d'un élément d'étanchéité annulaire à travers lequel l'arbre rotatif est inséré ; d'un couvercle qui recouvre de manière amovible la fenêtre d'exposition ; et d'une première partie de régulation qui est disposée dans au moins l'une des surfaces parmi une surface latérale de partie de corps qui est une surface latérale de partie de corps de levier de la première surface latérale de levier, et une surface interne de couvercle sur le côté de levier de montage de support de montage du couvercle, et qui régule le déplacement du levier de montage de support de montage dans une première direction.
PCT/JP2019/001275 2018-02-16 2019-01-17 Endoscope WO2019159591A1 (fr)

Priority Applications (3)

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DE112019000825.0T DE112019000825T5 (de) 2018-02-16 2019-01-17 Endoskop
CN201980009015.5A CN111629648B (zh) 2018-02-16 2019-01-17 内窥镜
JP2020500338A JP6859483B2 (ja) 2018-02-16 2019-01-17 内視鏡

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JP2018-026107 2018-02-16
JP2018026107 2018-02-16

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WO2019159591A1 true WO2019159591A1 (fr) 2019-08-22

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3772107B2 (ja) * 2001-10-12 2006-05-10 オリンパス株式会社 内視鏡システム
JP2017079877A (ja) * 2015-10-23 2017-05-18 富士フイルム株式会社 内視鏡
JP2017079876A (ja) * 2015-10-23 2017-05-18 富士フイルム株式会社 内視鏡

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Publication number Priority date Publication date Assignee Title
JP3527561B2 (ja) * 1994-06-13 2004-05-17 ペンタックス株式会社 内視鏡
JP4201408B2 (ja) * 1998-12-15 2008-12-24 Ｈｏｙａ株式会社 内視鏡の先端部
JP4044321B2 (ja) * 2001-11-27 2008-02-06 フジノン株式会社 内視鏡
JP6307464B2 (ja) * 2015-03-20 2018-04-04 富士フイルム株式会社 内視鏡
JP2017136298A (ja) * 2016-02-05 2017-08-10 富士フイルム株式会社 内視鏡

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3772107B2 (ja) * 2001-10-12 2006-05-10 オリンパス株式会社 内視鏡システム
JP2017079877A (ja) * 2015-10-23 2017-05-18 富士フイルム株式会社 内視鏡
JP2017079876A (ja) * 2015-10-23 2017-05-18 富士フイルム株式会社 内視鏡

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DE112019000825T5 (de) 2020-10-22
JP6859483B2 (ja) 2021-04-14
CN111629648B (zh) 2023-06-23
CN111629648A (zh) 2020-09-04

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