WO2022071569A1 - Endoscope - Google Patents

Endoscope Download PDF

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Publication number
WO2022071569A1
WO2022071569A1 PCT/JP2021/036395 JP2021036395W WO2022071569A1 WO 2022071569 A1 WO2022071569 A1 WO 2022071569A1 JP 2021036395 W JP2021036395 W JP 2021036395W WO 2022071569 A1 WO2022071569 A1 WO 2022071569A1
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WO
WIPO (PCT)
Prior art keywords
wire
lever
sliding lever
standing
catch
Prior art date
Application number
PCT/JP2021/036395
Other languages
English (en)
Japanese (ja)
Inventor
高志 原田
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 JP2022554139A priority Critical patent/JPWO2022071569A1/ja
Publication of WO2022071569A1 publication Critical patent/WO2022071569A1/fr

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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
    • 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

Definitions

  • the present invention relates to an endoscope, and in particular, relates to an endoscope provided with a stand on the tip end side of an insertion portion to change the direction in which the treatment tool is derived.
  • various treatment tools are introduced from the treatment tool introduction port provided in the operation part, and this treatment tool is taken out from the treatment tool outlet opened at the tip of the insertion part and used for treatment.
  • a treatment tool such as a guide wire or a contrast tube is used.
  • Treatment tools such as puncture needles are used in ultrasonic endoscopes.
  • treatment tools such as forceps or snares are used.
  • Such a treatment tool needs to change the lead-out direction at the tip in order to treat a desired position in the subject. Therefore, the tip main body of the tip is provided with an upright stand for changing the direction of taking out the treatment tool.
  • the endoscope is provided with a treatment tool standing mechanism that displaces the posture of the standing table between the standing position and the lying position.
  • an endoscope for example, in Patent Document 1, a direction changing portion provided at the tip portion of the insertion portion, a wire connected to the direction changing portion, and a wire are inserted into the inside of the operation portion.
  • an endoscope comprising a guide tube provided, a sliding member to which a wire is connected and sliding in the guide tube, and a link member for moving the sliding member with respect to the guide tube.
  • the base end of the wire and the base end of the sliding member are detachably fixed by the collet chuck by tightening the cap.
  • a latch provided on a slide provided with a collet is clamped in a concave portion on the tip end side of the arm connected to the lever to link the lever and the slide.
  • the present invention has been made in view of such circumstances, and an object of the present invention is to provide an endoscope having improved handleability when releasing the fixing of the standing operation wire.
  • the endoscope according to the present invention has an operation unit provided with an operation member, an insertion unit provided on the tip side of the operation unit and inserted into a subject, and an insertion unit.
  • a treatment tool standing table provided at the tip of the portion, a standing operation wire whose tip side is connected to the treatment tool standing table and pushed and pulled according to the operation of the operating member to operate the treatment tool standing table, and standing up.
  • a wire fixing mechanism for fixing the base end side of the operation wire is provided, the operation unit has a link member that operates in conjunction with the operation of the operation member, and the wire fixing mechanism can be detachably connected to the link member.
  • the treatment tool standing stand can be moved between the standing position and the tilted position. It has a sliding lever that rotates between them, and the wire fixing mechanism allows the sliding lever to move in the detaching direction from the link member when the treatment tool stand is in the inverted position, and the treatment tool. It has a regulating part that regulates the movement of the sliding lever in the detaching direction when the standing table is not in the tilted position.
  • the sliding lever has a contact portion whose movement in the detaching direction is restricted, and the sliding lever corresponds to a tilted position in conjunction with the operation of the operating member. It is slidable between the 1 lever position and the 2nd lever position corresponding to the upright position, and the regulating part has the contact part in contact with the regulation part when the sliding lever is in the 1st lever position.
  • the contact portion is located at a position where it can contact the regulation portion.
  • the wire fixing mechanism includes a wire catch that detachably locks and fixes the base end side of the standing operation wire, and a catch guide that guides the wire catch in the wire axial direction of the standing operation wire.
  • the wire catch can move forward and backward in the wire axial direction in conjunction with the sliding of the sliding lever, and the regulating portion has a regulating surface provided on the catch guide and the sliding lever. Is in the second lever position, it is preferable that the contact portion abuts on the regulation surface to restrict the movement of the sliding lever in the detaching direction.
  • the sliding lever is rotatably connected to the catch guide around a rotation axis orthogonal to the wire axis direction, and the detachment direction is that of the sliding lever centered on the rotation axis. It is preferable that the rotation direction is the rotation direction in which the end portion of the sliding lever on the side connected to the link member moves away from the link member.
  • the regulation surface is preferably located on the movement locus of the contact portion when the sliding lever moves in the rotational direction.
  • the catch guide has a catch guide main body for accommodating the wire catch and a cap for covering the catch guide main body from the base end side in the wire axial direction, and the regulating surface is provided on the cap. It is preferable to be.
  • the locking state between the base end side of the standing operation wire and the wire catch can be released by moving the sliding lever in the detaching direction.
  • the link member has a connected portion and the sliding lever has a detachable connecting portion on the connected portion.
  • the sliding lever has a lever insertion hole through which the link member can be inserted, and the connected portion and the connecting portion are connected in a state where the link member is inserted through the lever insertion hole. Is preferable.
  • the sliding lever includes an unlocking member for releasing the connection between the connected portion and the connecting portion.
  • Configuration diagram of an endoscope system including the endoscope of the embodiment Assembled perspective view of the tip of the endoscope shown in FIG.
  • Enlarged perspective view of the base end of the operation unit Enlarged perspective view of the base end of the operation unit Explanatory drawing to attach the wire fixing mechanism to the main body of the operation unit Explanatory drawing to attach the wire fixing mechanism to the main body of the operation unit Explanatory drawing to attach the wire fixing mechanism to the main body of the operation unit Explanatory drawing to attach the wire fixing mechanism to the main body of the operation unit Explanatory drawing to attach the wire fixing mechanism to the main body of the operation unit Explanatory drawing for connecting the sliding lever to the standing operation lever
  • FIG. 13 Perspective view of the main part with the cap removed from the wire fixing mechanism shown in FIG. Perspective view of the main part showing the configuration of the sliding lever
  • FIG. 13 Perspective view of the main part showing the configuration of the sliding lever
  • Sectional drawing of the wire fixing mechanism along the XVI-XVI line of FIG. Explanatory drawing showing a state in which the locked portion protrudes from the locking hole.
  • Explanatory drawing showing a state in which a wire protrudes from a locking hole Explanatory drawing showing a state in which the wire is locked in the second hole.
  • Front view showing the state where the lever connection operation is started Explanatory drawing showing a state in which the locked portion is engaged with the concave portion in the middle of the lever connecting operation.
  • Front view showing the state where the first half of the lever connection operation is completed Sectional drawing of the wire fixing mechanism in the state of FIG. 24
  • Front view showing the state where the lever connection operation is completed Explanatory drawing showing a wire fixing range and a driving range
  • Front view of the main body of the operation unit where the sliding lever is located at the first lever position Perspective view of the main body of the operation unit in which the sliding lever is located at the position of the first lever. In FIG. 29, the figure after the sliding lever is rotated.
  • FIG. 1 is a block diagram of an endoscope system 12 including an endoscope 10 according to an embodiment of the present invention.
  • the endoscope system 12 includes an endoscope 10, an endoscope processor device 14, and a display 18.
  • the endoscope 10 includes a hand operation unit 22 provided with a standing operation lever 20 and an insertion unit 24 provided on the tip end side of the hand operation unit 22 and inserted into a subject.
  • the hand operation unit 22 functions as the operation unit of the present invention.
  • the insertion portion 24 has a long axis direction Ax from the proximal end portion to the distal end portion, and includes a flexible portion 26, a curved portion 28, and a distal end portion 30 in order from the proximal end side to the distal end side.
  • the detailed configuration of the tip portion 30 will be described later, but first, a schematic configuration of the tip portion 30 will be described.
  • FIG. 2 is an enlarged perspective view of the tip portion 30.
  • the endoscope 10 of the embodiment is a side endoscope used as, for example, a duodenal endoscope
  • the tip portion 30 of FIG. 2 has a configuration of a side endoscope. ..
  • the tip portion 30 is configured by attaching a cap 34 to the tip portion main body 32.
  • the cap 34 is provided with a treatment tool standing table 36 (hereinafter, referred to as a standing table 36) having a treatment tool guide surface 36A, and shows a state in which the standing table 36 is positioned in an inverted position.
  • FIG. 2 shows various contents arranged inside the insertion portion 24 of the endoscope 10 (see FIG. 1) in addition to the tip portion 30. That is, in FIG. 2, an operation is performed to change the lead-out direction of the treatment tool channel 37 that guides the tip portion of the treatment tool (not shown) to the tip portion main body 32 and the tip portion of the treatment tool derived from the tip portion main body 32.
  • An upright operation wire 38 (hereinafter referred to as a wire 38), a wire channel 40 composed of a close contact spring through which the wire 38 is inserted, an air supply / water supply tube 42, and a cable insertion channel 44 are shown. ing.
  • an angle wire (not shown) for bending the insertion channel 45 of the light guide that guides the illumination light supplied from the light source device 15 (see FIG. 1) to the tip main body 32 and the curved portion 28 (see FIG. 1). ) And the like are also arranged inside the insertion portion 24.
  • a three-dimensional Cartesian coordinate system in the three-axis direction (X-axis direction, Y-axis direction, Z-axis direction) will be described. That is, when the tip portion 30 is viewed from the hand operation unit 22 and the direction in which the treatment tool (not shown) is drawn out by the standing table 36 is the upward direction, the upward direction is the Z (+) direction and the opposite direction. The downward direction is the Z (-) direction. Further, the right direction at that time is the X (+) direction, and the left direction is the X ( ⁇ ) direction.
  • the front direction (the direction toward the tip end side in the long axis direction Ax direction of the insertion portion 24) at that time is the Y (+) direction
  • the rear direction (the base end side in the direction of the long axis direction Ax of the insertion portion 24).
  • Direction is the Y (-) direction.
  • the Y-axis direction including the Y (+) direction and the Y ( ⁇ ) direction is parallel to the long axis direction Ax direction of the insertion portion 24 and the wire axis direction of the wire 38.
  • the Y (+) direction points to the tip end side in the wire axis direction
  • the Y ( ⁇ ) direction points to the base end side in the wire axis direction.
  • the Z-axis direction is a direction orthogonal to the long-axis direction Ax
  • the X-axis direction is a direction orthogonal to the Y-axis direction and the Z-axis direction, respectively.
  • the hand operation unit 22 is configured to have a substantially cylindrical shape as a whole.
  • the hand operation unit 22 has an operation unit main body 46 provided with an standing operation lever 20 and a grip portion 48 connected to the operation unit main body 46.
  • the grip portion 48 is a portion that is gripped by the operator when the endoscope 10 is operated, and the base end portion of the insertion portion 24 is connected to the tip end side of the grip portion 48 via a breakage tube 50.
  • the base end portion of the universal cable 52 is connected to the operation unit main body 46, and the connector device 54 is provided at the tip end portion of the universal cable 52.
  • the connector device 54 is connected to the endoscope processor device 14.
  • the endoscope processor device 14 includes a light source device 15 and an image processing device 16.
  • the light source device 15 is provided with a processor-side connector 15A to which the connector device 54 is connected.
  • a display 18 for displaying an image processed by the image processing device 16 is connected to the image processing device 16.
  • the endoscope system 12 transmits power, optical signals, and the like between the endoscope 10 and the endoscope processor device 14 via a connector portion composed of a connector device 54 and a processor-side connector 15A. It has a configuration for non-contact transmission.
  • the light from the light source device 15 is transmitted via an optical fiber cable (not shown) and is emitted from the illumination window 74 (see FIG. 2) provided on the tip surface of the tip portion 30.
  • the optical signal obtained by capturing and converting the light captured from the observation window 76 (see FIG. 2) by the image pickup device is image-processed by the image processing device 16 and displayed as an image on the display 18.
  • the air supply / water supply button 57 and the suction button 59 are arranged side by side on the operation unit main body 46.
  • the air supply / water supply button 57 is a button that can be operated in two stages, and air can be supplied to the air supply / water supply nozzle 58 (see FIG. 2) via the air supply / water supply tube 42 by the first stage operation. Water can be supplied to the air supply / water supply nozzle 58 via the air supply / water supply tube 42 by the operation of the step. Further, when the suction button 59 is operated, body fluid such as blood can be sucked from the treatment tool outlet 60 (FIG. 2) via the treatment tool channel 37.
  • a pair of angle knobs 62, 62 for bending the curved portion 28 are arranged on the operation unit main body 46.
  • the pair of angle knobs 62, 62 are provided coaxially and rotatably.
  • four angle wires (not shown) are connected to the angle knobs 62 and 62 and the curved portion 28, and these angle wires are pushed and pulled by the rotation operation of the angle knobs 62 and 62.
  • the curved portion 28 is curved vertically and horizontally.
  • the operation unit main body 46 is provided with a standing operation lever 20 rotatably coaxially with the angle knobs 62 and 62.
  • the standing operation lever 20 is rotationally operated by the operator who grips the grip portion 48.
  • the standing operation lever 20 functions as an operation member of the present invention.
  • a wire fixing mechanism 78 is provided outside the operation unit main body 46.
  • the wire fixing mechanism 78 has a sliding lever 80 and a fixing unit 82, and has a configuration for fixing the base end side of the wire 38 (see FIG. 2) as described later.
  • One end of the sliding lever 80 is detachably connected to the standing operation lever 20 side, and moves (slides) in conjunction with the rotation operation of the standing operation lever 20.
  • the fixing unit 82 is provided at the other end of the sliding lever 80.
  • the fixing unit 82 is attached to the operation unit main body 46, and the base end side of the wire 38 is fixed to the fixing unit 82.
  • the wire fixing mechanism 78 will be described later.
  • the grip portion 48 of the hand operation unit 22 includes a treatment tool introduction port 64 for introducing the treatment tool.
  • the treatment tool (not shown) introduced from the treatment tool introduction port 64 with the tip portion at the head is inserted into the treatment tool channel 37 shown in FIG. 2 and is led out from the treatment tool outlet 60 to the outside.
  • the treatment tool include a biopsy forceps having a cup capable of collecting biological tissue at the tip, a knife for EST (Endoscopic Sphincterotomy), or a contrast tube.
  • the tip main body 32 is made of, for example, a metal material having corrosion resistance, and has a partition wall 68 projecting in the Y (+) direction.
  • the standing table accommodating space (not shown) is defined by the partition wall 68 and the wall portion 34B of the cap 34.
  • a through hole 61 is formed in the tip main body 32, and the wire 38 is inserted through the through hole 61.
  • An illumination window 74 and an observation window 76 are arranged adjacent to each other in the Y direction on the upper surface 68A on the Z (+) side of the partition wall 68.
  • the illumination window 74 can irradiate the visual field region in the Z (+) direction with illumination light, and the observation window 76 can observe the visual field region in the Z (+) direction.
  • the tip main body 32 is provided with an air supply / water supply nozzle 58 toward the observation window 76, and the observation window 76 is washed by air and water ejected from the air supply / water supply nozzle 58.
  • the cap 34 is made of an elastic material such as a rubber material or a resin material.
  • the rubber material include fluorine rubber and silicon rubber
  • the resin material include polysulfone and polycarbonate.
  • the cap 34 includes a wall portion 34B whose tip side is sealed and formed in a substantially cylindrical shape, and a substantially rectangular opening window 34A is formed in a part of the wall portion 34B.
  • the opening window 34A is opened in the Z (+) direction.
  • the cap 34 is provided with a bearing 34C that rotatably supports the upright stand 36 inside.
  • the bearing 34C has a height in the Z (+) direction and is configured as a plate-like body extending in the Y (+) direction.
  • the upright stand 36 has a rotating shaft 36B along the X direction, and the rotating shaft 36B is rotatably supported by a through hole (not shown) of the bearing 34C. As a result, the standing table 36 rotates about the rotation shaft 36B, and its posture is changed between the lying position (see FIG. 2) and the standing position.
  • the tip of the wire 38 is connected to the stand 36.
  • the wire 38 is connected to the tip side of the upright stand 36 on the side opposite to the side on which the rotation shaft 36B is formed and at a position adjacent to the treatment tool guide surface 36A.
  • the cap 34 configured in this way is of the type to which the upright stand 36 is pre-attached, and the wire 38 is also preliminarily connected to the upright stand 36.
  • the cap 34 of this example is removed from the tip body 32 and discarded together with the upright stand 36 and the wire 38, for example, as disposable.
  • the standing table 36 may be attached to the tip main body 32 instead of the cap 34.
  • the wire fixing mechanism 78 shown in FIG. 1 has a sliding lever 80 and a fixing unit 82 as described above.
  • 3 to 8 are enlarged perspective views showing a portion on the base end side of the operation unit main body 46, respectively.
  • the base end surface 46A of the operation unit main body 46 is provided with a cylindrical connection portion 25 in which a take-out port 23 for leading out the base end side of the wire 38 is formed.
  • the connecting portion 25 is projected from the proximal end surface 46A in the Y ( ⁇ ) direction, and the proximal end side of the wire 38 is projected from the outlet 23 in the Y ( ⁇ ) direction.
  • the wire 38 is projected from a position eccentric with respect to the axial center 25A of the connecting portion 25.
  • the wire 38 is provided with a long wire body 38A and a locked portion 39 having an outer shape larger than that of the wire body 38A, which is located on the base end side of the wire body 38A.
  • a cylinder is exemplified as the shape of the locked portion 39, but the shape is not limited to this, and any outer shape larger than that of the wire body 38A may be, for example, a sphere.
  • wire 38 when used, it mainly refers to the wire body 38A.
  • FIG. 4 shows a wire 38 having a longer protrusion length than the wire 38 shown in FIG.
  • the wires 38 shown in FIGS. 3 and 4 both have the same length, but the reason why the protruding lengths of the wires 38 having the same length are different is the soft portion 26 or the curved portion 28 (FIG. 3). 1)).
  • the wire fixing mechanism 78 of this example has a configuration in which the wire 38 can be fixed without being affected by the protruding length of the wire 38, and this configuration will be described later.
  • the fixing unit 82 is opposed to the locked portion 39 of the wire 38.
  • the open end 84A of the cam groove 84 provided in the fixing unit 82 is aligned with the cam pin 86 projecting from the outer peripheral surface of the connecting portion 25.
  • the cam groove 84 is formed so as to be inclined from the opening end 84A toward the Y ( ⁇ ) direction.
  • the wire 38 is housed inside the fixing unit 82 with the locked portion 39 at the head while advancing the fixing unit 82 toward the connecting portion 25 in the Y (+) direction. To go.
  • this operation is referred to as a "wire accommodating operation”.
  • the fixing unit is set with the axis 25A (see FIG. 4) eccentric from the wire 38 as the rotation axis.
  • the 82 is rotated in the clockwise direction indicated by the arrow B from the state shown in FIG. In this case, it is preferable to rotate the fixing unit 82 by using the sliding lever 80. Then, the fixing unit 82 is pushed in the Y (+) direction by the guide action between the cam groove 84 and the cam pin 86. Then, in the posture of FIG.
  • the fixing unit 82 is attached to the operation unit main body 46 via the connection unit 25.
  • this operation is referred to as a "rotational mounting operation”. Therefore, the fixed unit 82 is mounted on the operation unit main body 46 through the above-mentioned “wire accommodating operation” and “rotational mounting operation”. The “wire accommodating operation” and the “rotational mounting operation” are executed by one action.
  • FIG. 9 is an enlarged perspective view showing a portion of the operation unit main body 46 on the base end side.
  • the operation unit main body 46 has a link member 88 connected to the standing operation lever 20 via a rotating drum (not shown).
  • the link member 88 is rotatably provided around the rotation axis of the standing operation lever 20 and is rotated in the same direction in conjunction with the rotation operation of the standing operation lever 20.
  • An opening 90 is formed in the link member 88. This opening 90 functions as a connected portion of the present invention.
  • the sliding lever 80 is provided with a lever insertion hole 206 through which the link member 88 can be inserted.
  • the lever insertion hole 206 is provided so as to penetrate the end of the lever body 122.
  • the sliding lever 80 has a cantilever-shaped elastic piece, and has a claw portion 92 provided at the tip (free end) of the elastic piece so as to project toward the lever insertion hole 206 side.
  • the claw portion 92 functions as a connecting portion of the present invention.
  • the sliding lever 80 is rotatably connected to the fixed unit 82 via a first axis 94 that is selectively switched and a second axis 96 shown by a broken line.
  • the sliding lever 80 shown in FIG. 8 when the sliding lever 80 shown in FIG. 8 is pushed down toward the link member 88 in the direction indicated by the arrow C, the sliding lever 80 first rotates with the first axis 94 as the rotation axis. As shown in FIG. 9, it approaches the link member 88. After that, when the above-mentioned pushing-down operation is continued, the sliding lever 80 rotates with the second shaft 96 as the rotation axis, and as shown in FIG. 10, the claw portion 92 engages with the opening 90 (see FIG. 9). It fits.
  • FIG. 10 is a front view of the operation unit main body 46 as viewed from the X (+) direction side of the operation unit main body 46.
  • FIG. 10 shows a state in which the standing operation lever 20 is located at the lodging operation position. That is, the wire fixing mechanism 78 of this example is connected to the standing operation lever 20 located at the lodging operation position via the link member 88. Further, as will be described in detail later, the locked portion 39 (see FIG. 4) of the wire 38 is a fixed unit by undergoing the above-mentioned "wire accommodating operation”, “rotational mounting operation”, and “lever connecting operation”. It is fixed to 82.
  • the lever connection operation is performed at the lodging operation position is shown, but the present invention is not limited to this, and the lever connection operation may be performed at a position other than the lodging operation position. For example, the lever connection operation may be performed at the standing operation position, or may be performed between the standing operation position and the lodging operation position.
  • FIG. 10 when the posture of the standing table 36 (see FIG. 2) is changed by rotating the standing operation lever 20, the standing operation lever 20 of FIG. 10 located at the lodging operation position is shown in FIG. Rotate in the counterclockwise direction indicated by the arrow U (see FIG. 10) toward the indicated standing operation position. Then, the link member 88 rotates in the counterclockwise direction, the sliding lever 80 connected to the link member 88 moves in the Y ( ⁇ ) direction, and the fixing unit 82 connected to the sliding lever 80 moves in the Y ( ⁇ ) direction. ) Move in the direction. Since the locked portion 39 of the wire 38 (see FIG. 2) is fixed to the fixing unit 82, the wire 38 is pulled in the Y ( ⁇ ) direction by the rotation operation of the standing operation lever 20. As a result, the posture of the standing table 36 connected to the tip of the wire 38 is changed from the lying position in FIG. 2 to the standing position.
  • the wire fixing mechanism 78 when the wire fixing mechanism 78 is removed from the operation unit main body 46, the "lever connection operation", the “rotational mounting operation”, and the “wire accommodating operation” may be executed in reverse procedures.
  • FIG. 12 is a front view of the fixed unit 82.
  • the fixing unit 82 guides the wire catch 100 that detachably locks and fixes the base end side of the wire 38 and the wire catch 100 in the wire axial direction (Y-axis direction) of the wire 38. It has a catch guide 102 and a wire. Further, the wire catch 100 has a catch main body 104 and a fixing member 106. As will be described in detail later, among the constituent members of the fixed unit 82, the members that move forward and backward in the Y-axis direction by the operation of the sliding lever 80 (the lever connecting operation and the driving operation of the standing table 36) are , The wire catch 100 and the catch guide 102 does not move.
  • the catch guide 102 is provided with a cylindrical connecting portion 108 having a cam groove 84 at the end on the Y (+) direction side, and this connecting portion 108 is connected to the connecting portion 25 of the operating portion main body 46 (see FIG. 6). Will be done.
  • the catch guide 102 has a cap 107 attached to an end portion on the Y ( ⁇ ) direction side.
  • the cap 107 has claws 110 and 110 formed on both walls, and the claws 110 and 110 can be detachably attached to and detached from the catch guide 102 by engaging the claws 110 and 110 with the grooves 112 and 112 on both walls of the catch guide 102. It is attached.
  • FIG. 13 is a perspective view of a main part when the cap 107 is removed from the catch guide 102 shown in FIG.
  • a catch guide groove 114 extending in the wire axial direction is formed in the central portion, and the first shaft 94 is slidably engaged and guided along the catch guide groove 114. ..
  • the first shaft 94 is a shaft constituting one of the rotating shafts of the sliding lever 80, and is fixed to the catch body 104.
  • the lever bearing hole 80A (see FIG. 14) of the sliding lever 80 is rotatably engaged with the first shaft 94.
  • FIG. 14 is a perspective view showing a main part of the sliding lever 80.
  • the sliding lever 80 has a pair of plate-shaped portions 120 and 120 that sandwich and hold the fixing unit 82 (see FIG. 5), and a lever body 122 integrated with the plate-shaped portions 120 and 120. And have.
  • a second shaft 96 which is one of the rotation shafts of the sliding lever 80, is provided on the inner side surfaces of the plate-shaped portions 120 and 120 facing each other, and the second shaft 96 is the catch guide 102 shown in FIG. It is projected toward the surface 102A of. Further, in the plate-shaped portions 120 and 120, cam grooves 124 having a substantially L-shape are formed at positions facing each other, and the pins 126 provided in the fixing member 106 (see FIG. 13) are engaged in the cam grooves 124. It has been combined. The cam groove 124 will be described later.
  • a boss 121 is provided on the inner side surfaces of the plate-shaped portions 120 and 120 facing each other, and the boss 121 is projected toward the surface 102A of the catch guide 102 shown in FIG. Further, the surface 102A is formed with a boss hole 103 to which the boss 121 elastically engages. Therefore, when the boss 121 engages with the boss hole 103, the sliding lever 80 is held in the posture shown in FIGS. 5 to 8. Further, by releasing the engagement state of the boss 121 with the boss hole 103, the rotation operation of the sliding lever 80 is permitted.
  • a first regulation surface 105 to which the boss 121 shown by the alternate long and short dash line in FIG. 13 can abut is formed.
  • the first regulating surface 105 abuts on the boss 121 to regulate the movement of the sliding lever 80 when the pin 126 is present in the first cam groove portion 125A (see FIG. 21) described later in the cam groove 124.
  • the first regulation surface 105 enables the sliding lever 80 to rotate about the first shaft 94.
  • the first regulation surface 105 is composed of an arcuate surface centered on the first axis 94. As a result, the sliding lever 80 can smoothly rotate around the first shaft 94.
  • a second regulation surface 116 is formed on the surface 102A of the catch guide 102.
  • the second regulation surface 116 is a surface that can come into contact with the second shaft 96 when the above restriction on the sliding lever 80 by the first regulation surface 105 is released. That is, the first regulation surface 105 is formed only up to a position corresponding to the position where the second axis 96 abuts on the second regulation surface 116, and at the position where the second axis 96 abuts on the second regulation surface 116. The regulation will be lifted.
  • the restriction on the sliding lever 80 by the first regulation surface 105 may be released at the same time as the second axis 96 abuts on the second regulation surface 116, or the second axis 96 may be the second regulation surface.
  • the second regulating surface 116 abuts on the second shaft 96 to restrict the movement of the sliding lever 80 when the pin 126 is present in the second cam groove portion 125B (see FIG. 21) described later in the cam groove 124. do.
  • the second regulation surface 116 allows the sliding lever 80 to rotate about the second axis 96 while moving the second axis 96 along the second regulation surface 116.
  • the second regulation surface 116 is formed so as to be inclined in the Y (+) direction from the catch guide groove 114 toward the outside of the catch guide 102.
  • the sliding lever 80 rotates with the first axis 94 as the rotation axis.
  • the second axis 96 moves from the position on the left side with respect to the second regulated surface 116 toward the second regulated surface 116.
  • the regulation of the first axis 94 by the first regulation surface 105 is released, the second axis 96 comes into contact with the second regulation surface 116, and the second regulation surface 116 slides.
  • the movement of the moving lever 80 is regulated.
  • the sliding lever 80 can rotate about the second axis 96, so that the sliding lever 80 rotates with the second axis 96 as the rotation axis.
  • FIG. 15 is a perspective view showing a state immediately before mounting the wire fixing mechanism 78 on the operation unit main body 46.
  • FIG. 16 is a cross-sectional view of the fixing unit 82 along the XVI-XVI line of FIG.
  • the catch body 104 is orthogonal to the columnar portion 130 and the axis of the columnar portion 130 from the columnar portion 130 (corresponding to the axis center 25A which is the rotation axis of the fixed unit 82). It has a pair of first axes 94, 94 projecting in the direction, and a guide portion 132 projecting from the columnar portion 130 in the Y ( ⁇ ) direction.
  • the guide portion 132 is formed with a catch body groove 133 extending in the wire axial direction.
  • the catch body groove 133 is provided at a position overlapping the catch guide groove 114, and a pin 126 (see FIG. 13) is inserted.
  • the pin 126 is a cam pin that is engaged with the cam groove 124 of the sliding lever 80, and can move freely forward and backward along the catch body groove 133 by being guided by the cam groove 124.
  • the cylindrical portion 130 has a locking hole 137 that can be locked through the locked portion 39 (see FIG. 17).
  • the locking hole 137 is formed as a through hole penetrating the columnar portion 130 in the Y-axis direction.
  • the locking hole 137 is a first hole 134 having a size through which the locked portion 39 can be inserted, and a second hole having a size larger than the outer shape of the wire body 38A and smaller than the outer shape of the locked portion 39. It has holes 136, and the first hole 134 and the second hole 136 have a continuous opening shape.
  • the locking hole 137 is provided at a position eccentric from the axis 25A which is the rotation axis of the fixed unit 82, and the first hole 134 and the second hole 136 are provided along the rotation locus centered on the axis 25A. And are formed continuously.
  • the amount of eccentricity of the locking hole 137 with respect to the axis 25A is set to be substantially equal to the amount of eccentricity of the wire 38 with respect to the axis 25A shown in FIG.
  • the locked portion 39 is accommodated in the first hole 134 during the “wire accommodating operation” (see FIG. 6). Then, the locked portion 39 passes through the first hole 134 and projects outward from the first hole 134 as shown in FIG. Then, at the end of the "wire accommodating operation” (see FIG. 7), the wire 38 protrudes from the first hole 134 in the Y ( ⁇ ) direction as shown in the cross-sectional view of FIG.
  • the catch body 104 rotates with the catch guide 102 in the direction of arrow B about the axis 25A, so that the first hole 134 retracts from the wire 38. ..
  • the wire 38 is accommodated in the second hole 136 as shown in the cross-sectional view of FIG.
  • the locked portion 39 can be locked in the second hole 136.
  • FIG. 20 is an explanatory diagram showing an example of the positional relationship between the catch body 104 and the fixing member 106 at the end of the “rotational mounting operation” shown in FIG.
  • the fixing member 106 is arranged on the Y ( ⁇ ) direction side with respect to the catch body 104.
  • a fixing hole 138 having an opening 135 capable of receiving the locked portion 39 is formed on the end surface 106A on the Y (+) direction side of the fixing member 106.
  • the fixing hole 138 is formed at a position facing the second hole 136 shown in FIG. 19 in the Y-axis direction, and has a bottom portion 138A internally engaged with the locked portion 39. Further, the fixing hole 138 has a conical guide surface 139 that tapers from the opening 135 toward the bottom 138A. Although the guide surface 139 is not essential, it is preferable to provide the locked portion 39 in the fixing hole 138 from the viewpoint of smoothly guiding the locked portion 39 to the bottom portion 138A. As shown in FIG. 20, at the end of the "rotational mounting operation" (that is, before the start of the "lever connection operation"), the locked portion 39 is not engaged with the bottom portion 138A and is not engaged with the bottom portion 138A. It is located at a position separated from the Y (+) direction side.
  • FIG. 21 is a front view of the wire fixing mechanism 78 at the end of the “rotational mounting operation” shown in FIG. 19, which is a perspective view of the plate-shaped portion 120 of the sliding lever 80.
  • the boss 121 is fitted in the boss hole 103, and the second shaft 96 is located on the upper left side in FIG. 21 with respect to the second regulation surface 116.
  • the pin 126 is located at the right end 124A of the cam groove 124.
  • the cam groove 124 has a shape in which a linear first cam groove portion 125A and a curved second cam groove portion 125B are continuous.
  • the first cam groove portion 125A has a function of changing the relative distance between the catch main body 104 and the fixing member 106 by moving the fixing member 106 in the Y-axis direction in cooperation with the pin 126.
  • the second cam groove portion 125B has a function of maintaining the relative distance between the catch main body 104 and the fixing member 106 by moving the fixing member 106 in the Y-axis direction integrally with the catch main body 104. ..
  • the boss 121 is separated from the boss hole 103 and guided to the first regulation surface 105 as shown in FIG. 22, and the sliding lever 80 Rotates clockwise on FIG. 22 with the first axis 94 as the rotation axis. Then, this rotation causes the pin 126 to move along the first cam groove portion 125A.
  • the fixing member 106 moves in the Y (+) direction and approaches the catch body 104. Then, as shown in FIG. 23, the bottom portion 138A of the fixing hole 138 of the fixing member 106 engages with the locked portion 39 in the middle of the “lever connecting operation”.
  • the locked state between the locked portion 39 and the second hole 136 is fixed by the fixing member 106, and the locked portion 39 is securely fixed to the fixing unit 82.
  • the position of the fixing member 106 shown in FIG. 25 is the fixed position, and the position of the fixing member 106 shown in FIG. 20 is the release position.
  • the fixing member 106 can be moved between the fixing position and the releasing position by the rotation operation of the sliding lever 80.
  • the second axis 96 is the second regulation.
  • the sliding lever 80 rotates clockwise around the second axis 96 while moving along the surface 116.
  • the catch body 104 moves in the Y (-) direction via the first shaft 94, and the pin 126 moves along the second cam groove portion 125B, so that the fixing member 106 is the catch body. It moves in the Y (-) direction together with 104.
  • the wire 38 pushed in the Y (+) direction is pulled up in the Y ( ⁇ ) direction.
  • the "lever connecting operation” ends at the lodging operation position of FIG. 27 in which the sliding lever 80 is connected to the link member 88 (see FIG. 10), and the movement of the catch body 104 and the fixing member 106 stops.
  • the base end of the wire 38 is pulled up to the lodging operation position by the standing operation lever 20.
  • the pin 126 is located at the left end 124B of the cam groove 124.
  • the above is the outline of the operation of the catch body 104 and the fixing member 106.
  • the catch body 104 and the fixing member 106 reciprocate along the Y-axis direction in a state of being in contact with each other by the subsequent rotation operation of the standing operation lever 20 (driving operation of the standing table 36) (FIG. 10). And FIG. 11).
  • the wire 38 is pushed and pulled to raise and lower the standing table 36.
  • the operating range of the wire fixing mechanism 78 is the “wire fixing range” in which the wire catch 100 is operated by the “lever connecting operation” of the sliding lever 80, and the “drive range” in which the wire catch 100 is operated by the rotation operation of the standing operation lever 20. ", And has.
  • FIG. 28 is an explanatory diagram showing the above-mentioned “wire fixing range” and “driving range”.
  • the protruding lengths of the wires 38 protruding from the connecting portion 25 differ depending on the state of the flexible portion 26 or the curved portion 28 (see FIG. 1).
  • the wire catch 100 has a long protrusion length of the wire 38 (see XXVIIIA of FIG. 28) and a short protrusion length of the wire 38 (see XXVIIIB of FIG. 28).
  • the wire catch 100 executes the locking of the locked portion 39 with respect to the locking hole 137 and the fixing of the locked state between the locked portion 39 and the locking hole 137. Therefore, it is securely fixed to the wire fixing mechanism 78.
  • the wire 38 can be reliably fixed regardless of the protruding length of the wire 38.
  • the wire catch 100 operates in the "wire fixing range", so that the base end of the wire 38 is tilted by the upright operation lever 20 regardless of the protruding length of the wire 38. It can be pulled up to the position.
  • the positional relationship between the position of the standing table 36 and the position of the standing operation lever 20 can be made constant regardless of the protruding length of the wire 38.
  • the wire fixing mechanism 78 and the wire 38 are removed in the process of removing the wire fixing mechanism 78 from the operation unit main body 46.
  • the "lever connection operation”, the “rotational mounting operation”, and the “wire accommodating operation” performed at the time of mounting can be performed by performing the reverse procedures respectively.
  • the lock release member 98 is pushed toward the lever body 122.
  • the claw portion 92 retracts from the opening 90, the engagement between the opening 90 and the claw portion 92 is released, and the connection between the sliding lever 80 and the link member 88 is released.
  • the sliding lever 80 is rotated in the direction opposite to the rotation operation during the "lever connection operation" (corresponding to the "disengagement direction” of the present invention).
  • the pin 126 moves relatively along the cam groove 124, and the pin 126 moves to the terminal position (right end 124A) of the cam groove 124.
  • the fixing member 106 moves in the Y ( ⁇ ) direction and is located at the “release position” shown in FIG. In the "release position", the fixing member 106 is separated from the cylindrical portion 130 (see FIG. 23) of the catch body 104 in the Y (-) direction, and the wire 38 sandwiched between the fixing hole 138 and the end surface 130A of the cylindrical portion 130.
  • the locked portion 39 is unlocked.
  • the wire fixing mechanism 78 and the wire 38 are released from being fixed.
  • the fixing of the wire fixing mechanism 78 and the wire 38 can be released by rotating the sliding lever 80 in the direction opposite to the rotation operation during the “lever connection operation”.
  • the sliding lever 80 slidably moves within the drive range (see FIG. 28) as described above.
  • the position of the sliding lever 80 shown in FIG. 10 is the position located most on the Y (+) direction side, and the standing table 36 is in the inverted state (the "first lever” of the present invention. It corresponds to "position”.).
  • the position of the sliding lever 80 shown in FIG. 11 is the position located most on the Y ( ⁇ ) direction side, and corresponds to the position where the standing table 36 is in the standing state (corresponding to the “second lever position” of the present invention. To do.).
  • FIG. 29 is a front view of the operation unit main body 46 in which the sliding lever 80 in the present embodiment is located at the “first lever position”.
  • FIG. 30 is a perspective view of FIG. 29.
  • FIG. 31 is a diagram in which the sliding lever 80 is rotated from the position shown in FIG. 29.
  • a wire fixing mechanism 78 is provided on the base end side of the operation unit main body 46, and the wire fixing mechanism 78 has a fixing unit 82. Then, the catch guide 102 constituting the fixing unit 82 is provided with a regulating portion 302 that regulates the rotation of the sliding lever 80. The restricting portion 302 is provided on the end side of the catch guide 102 on the Y ( ⁇ ) direction side. Further, the catch guide 102 is composed of a catch guide main body 109 for accommodating the wire catch 100 (see FIG. 12) described above, and a cap 107 for covering the catch guide main body 109 from the base end side in the wire axial direction. In, the regulation unit 302 is arranged on the cap 107.
  • the regulating portion 302 is provided so as to project from the catch guide main body 109 in the axial direction (X-axis direction) of the pin 126.
  • the regulating portion 302 has a regulating surface 306 on the surface of the protruding regulating portion 302 on the Z (+) direction side.
  • the sliding lever 80 is provided with a contact portion 304 on the inner side surfaces of the plate-shaped portions 120 and 120 facing each other.
  • the contact portion 304 comes into contact with the regulation surface 306, the movement of the sliding lever 80 is restricted.
  • the state in which the sliding lever 80 is located at the first lever position is the state in which the sliding lever 80 is located most on the Y (+) direction side with respect to the contact portion 304.
  • the regulation unit 302 is located at the position farthest from the Y ( ⁇ ) direction side. That is, at the first lever position, the regulation surface 306 does not exist on the movement locus of the contact portion 304. In other words, at the first lever position, the contact portion 304 cannot contact the regulation surface 306 when the sliding lever 80 with the second shaft 96 as the rotation axis rotates. That is, at the first lever position, rotation of the sliding lever 80 with the second axis 96 as the rotation axis is permitted.
  • the regulating portion 302 is provided so as to project in the X direction from the surface of the cap 107, and is arranged with a step on the X direction side with respect to the surface of the catch guide main body 109.
  • the contact portion 304 has the surface of the catch guide main body 109 and the plate-shaped portion 120 of the sliding lever 80. It passes through the gap 308 formed between them.
  • the sliding lever 80 is allowed to move in the detaching direction.
  • the rotation axis of the sliding lever 80 is switched from the second axis 96 to the first axis 94, and the wire fixing to the wire fixing mechanism 78 can be released.
  • FIG. 32 is a front view of the operation unit main body 46 in which the sliding lever 80 is located at the “second lever position”.
  • the state in which the sliding lever 80 is located at the second lever position is the state in which the sliding lever 80 is located most in the Y (-) direction, and the regulating portion 302 is closest to the contact portion 304 in the Y direction. It is the position that was done. That is, at the second lever position, the regulation surface 306 exists on the movement locus of the contact portion 304. In other words, at the second lever position, the contact portion 304 can abut on the regulation surface 306 when the sliding lever 80 with the second shaft 96 as the rotation axis rotates. That is, at the second lever position, the rotation of the sliding lever 80 with the second axis 96 as the rotation axis is restricted. As a result, it is possible to prevent the sliding lever 80 from rotating with the first shaft 94 as the rotation axis, and it is possible to prevent the wire 38 from being released from the wire fixing mechanism 78.
  • the restricting portion 302 of the wire fixing mechanism 78 allows the sliding lever 80 to move in the detaching direction, thereby allowing the wire to move.
  • the fixing between the 38 and the wire fixing mechanism 78 can be released.
  • the contact portion 304 comes into contact with the regulation surface 306, and the movement of the sliding lever 80 in the detaching direction can be restricted.
  • the fixing between the wire 38 and the wire fixing mechanism 78 can be released only when the upright stand 36 is in the laid-down position where tension is not applied to the wire 38.
  • the movement of the sliding lever 80 in the detaching direction is not limited to the case where the position of the sliding lever 80 is in the maximum lodging position.
  • the tilting position is from the maximum tilting position to 1/2, and the remaining 1/2.
  • the sliding lever 80 may be able to rotate while the standing table 36 is in the inverted position, with the standing position from to the maximum standing position as the standing position. By setting the lodging position within this range, the movement of the standing table 36 due to the release of the fixing between the wire 38 and the wire fixing mechanism 78 is small, so that unexpected movement of the treatment tool can be prevented.
  • the lodging position may be set as the movement range from the maximum lodging position to 1/3.
  • the movement of the standing table 36 due to the release of the fixing between the wire 38 and the wire fixing mechanism 78 can be made smaller, and the unexpected movement of the treatment tool can be prevented.
  • the position of the sliding lever 80 when the wire 38 and the operation unit main body 46 are released from being fixed can be provided with a certain range. It is possible to improve the operability when releasing the fixing.
  • the position or shape of the regulating portion 302 and the position or shape of the contact portion 304 are not particularly limited. If the restricting portion 302 and the abutting portion 304 can be brought into contact with each other when the standing table 36 is not in the inverted position, it can be appropriately determined by the relative relationship between the regulating portion 302 and the abutting portion 304.
  • the unlocking member 98 makes it possible to easily release the connection between the sliding lever 80 and the link member 88, but the unlocking member 98 is tentatively operated. Even if the connection is released, the movement of the sliding lever 80 is restricted by the regulating unit 302 when the standing table 36 is in the standing state. This makes it possible to prevent the wire 38 and the wire fixing mechanism 78 from being released from being fixed, which is effective.
  • the technique of the present invention is not limited to the duodenal endoscope and can be applied to other endoscopes such as a colonoscope or an enteroscopy. ..
  • the present invention may be modified or modified without departing from the gist of the present invention.
  • Endoscope 12 Endoscope system 14
  • Endoscope processor device 15
  • Light source device 15A Processor side connector 16
  • Image processing device 18
  • Display 20
  • Standing operation lever 22
  • Hand operation unit 23
  • Outlet port 25
  • Connection unit 25A
  • Axis center 24
  • Insertion unit 26
  • Flexible part 28
  • Curved part 30
  • Tip part 32
  • Tip part Main body 34
  • Cap 34A Opening window 34B
  • 34C Bearing 36
  • Rotating shaft 37
  • Treatment tool channel 38
  • Standing operation wire (wire) 39
  • Locked part 40
  • Wire channel 42
  • Air supply water supply tube 44
  • Cable insertion channel 45
  • Insertion channel 46
  • Operation part main body 46A
  • Base end surface 48
  • Folding prevention pipe 52
  • Universal cable 54
  • Connector device 57
  • Air supply water supply button 58
  • Air supply water supply nozzle 59
  • Suction button 60
  • Treatment tool outlet 61
  • Angle knob 64

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Surgery (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Biomedical Technology (AREA)
  • Optics & Photonics (AREA)
  • Pathology (AREA)
  • Radiology & Medical Imaging (AREA)
  • Biophysics (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Endoscopes (AREA)

Abstract

L'invention concerne un endoscope présentant une exploitabilité améliorée lorsque l'immobilisation d'un fil de fonctionnement dressé est relâchée. Un endoscope (10) comprend un mécanisme d'immobilisation de fil (78) qui immobilise le côté extrémité de base d'un fil (38), et un élément de liaison (88) qui est disposé sur un corps de partie de fonctionnement (46) et qui fonctionne conjointement avec le fonctionnement d'un levier de fonctionnement dressé (20). Le mécanisme d'immobilisation de fil comprend un levier coulissant (80) qui peut être relié de manière amovible à l'élément de liaison (88), et fait avancer et reculer le fil (38) dans la direction de l'axe du fil conjointement avec le fonctionnement du levier de fonctionnement dressé (20), ce qui permet la rotation d'une base dressée (36) entre une position dressée et une position enfoncée. Le mécanisme d'immobilisation de fil (78) comprend une partie de commande (302) qui permet le déplacement du levier coulissant (80) à partir de l'élément de liaison (88) dans une direction de séparation lorsque la base dressée (36) est dans la position enfoncée, et empêche le déplacement du levier coulissant (80) dans la direction de séparation lorsque la base dressée (36) n'est pas dans la position enfoncée.
PCT/JP2021/036395 2020-10-02 2021-10-01 Endoscope WO2022071569A1 (fr)

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Applications Claiming Priority (2)

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JP2020167401 2020-10-02
JP2020-167401 2020-10-02

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003305002A (ja) * 2002-04-17 2003-10-28 Olympus Optical Co Ltd 内視鏡
JP2015104424A (ja) * 2013-11-28 2015-06-08 富士フイルム株式会社 ワイヤ押し引き装置及び内視鏡
US20180168435A1 (en) * 2016-12-15 2018-06-21 Karl Storz Se & Co. Kg Endoscope
WO2018230135A1 (fr) * 2017-06-13 2018-12-20 オリンパス株式会社 Endoscope

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003305002A (ja) * 2002-04-17 2003-10-28 Olympus Optical Co Ltd 内視鏡
JP2015104424A (ja) * 2013-11-28 2015-06-08 富士フイルム株式会社 ワイヤ押し引き装置及び内視鏡
US20180168435A1 (en) * 2016-12-15 2018-06-21 Karl Storz Se & Co. Kg Endoscope
WO2018230135A1 (fr) * 2017-06-13 2018-12-20 オリンパス株式会社 Endoscope

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