WO2021106830A1 - Endoscope - Google Patents

Endoscope Download PDF

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Publication number
WO2021106830A1
WO2021106830A1 PCT/JP2020/043571 JP2020043571W WO2021106830A1 WO 2021106830 A1 WO2021106830 A1 WO 2021106830A1 JP 2020043571 W JP2020043571 W JP 2020043571W WO 2021106830 A1 WO2021106830 A1 WO 2021106830A1
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WO
WIPO (PCT)
Prior art keywords
fluid
observation window
tip
guide
longitudinal axis
Prior art date
Application number
PCT/JP2020/043571
Other languages
English (en)
Japanese (ja)
Inventor
牧人 小向
毅司 雪入
広幸 岩根
皆川　龍也
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 CN202080079986.XA priority Critical patent/CN114746004A/zh
Priority to JP2021561397A priority patent/JP7289369B2/ja
Publication of WO2021106830A1 publication Critical patent/WO2021106830A1/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
    • A61B1/12—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 with cooling or rinsing arrangements
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B23/00—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
    • G02B23/24—Instruments or systems for viewing the inside of hollow bodies, e.g. fibrescopes
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B23/00—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
    • G02B23/24—Instruments or systems for viewing the inside of hollow bodies, e.g. fibrescopes
    • G02B23/26—Instruments or systems for viewing the inside of hollow bodies, e.g. fibrescopes using light guides

Definitions

  • the present invention relates to an endoscope, and particularly relates to an endoscope that cleans an observation window arranged on the tip surface of an insertion portion with a fluid jetted from a fluid jet nozzle.
  • an observation window that takes in the subject light from the observed part and an illumination window that irradiates the observed part with the illumination light are arranged. Further, on the tip surface, a fluid injection nozzle (fluid ejection nozzle) that injects a cleaning liquid (for example, water) and a gas (for example, air) toward the observation window in order to remove deposits such as body fluid adhering to the observation window. Alternatively, an air supply / water supply nozzle) is arranged.
  • a cleaning liquid for example, water
  • a gas for example, air
  • the cleaning liquid is ejected from the injection port of the fluid injection nozzle to remove the deposits adhering to the observation window, and then the gas is injected from the injection port to remain in the observation window. Remove the cleaning fluid.
  • Patent Document 1 discloses an endoscope that enables the fluid ejected from the injection port to flow to the observation window and an adjacent region adjacent to the observation window when cleaning the observation window.
  • a fluid guidance unit between the fluid injection nozzle and the observation window, a fluid guidance unit, a first fluid route that guides a part of the fluid guided by the fluid guidance unit to the observation window, and fluid guidance. It is provided with a second fluid route that guides the out-of-part fluid to the adjacent region.
  • the diameter of the insertion part of the endoscope tends to be reduced in order to reduce the burden on the subject.
  • it is required to reduce the size of the observation window and the fluid injection nozzle arranged on the tip surface of the insertion portion but on the other hand, it is desired to obtain a wide range of images with a large viewing angle. In such a case, it is desired to apply an observation window having a diameter as large as possible.
  • the size of the injection port (injection port) is generally compared.
  • the size of the observation window (corresponding to the opening width of the observation window) is smaller than the size of the observation window (corresponding to the diameter of the observation window).
  • both side portions Since it becomes difficult for the fluid to flow to the outer peripheral portion of the window (hereinafter referred to as both side portions), there arises a problem that the cleanability of both side portions of the observation window is deteriorated.
  • the present invention has been made in view of such circumstances, and an object of the present invention is to provide an endoscope capable of improving the cleanability of both sides of an observation window.
  • the endoscope according to the present invention is provided at an insertion portion having a tip, a proximal end and a longitudinal axis, an operation portion provided at the proximal end of the insertion portion, and a tip of the insertion portion.
  • the observation window arranged on the tip surface
  • the fluid injection nozzle arranged on the tip surface and injecting fluid from the injection port opened toward the observation window
  • the fluid injection nozzle and the observation window are provided in the above and is provided with a fluid guide portion for guiding the fluid jetted from the injection port to the observation window
  • the fluid guide portion is provided on an extension extending the opening region of the injection port in the fluid injection direction and has a tip surface.
  • the ridge is composed of a ridge that rises toward the tip in the longitudinal axis direction, and the ridge is a straight line that connects the top of the ridge formed on the tip side in the longitudinal axis direction with the center of the injection port and the center of the observation window. It has a pair of first guide surfaces formed on both sides of the top in the direction orthogonal to the above and guiding a part of the fluid jetted from the injection port to both sides of the observation window in the direction orthogonal to.
  • the pair of first guide surfaces may be formed by slopes containing components oblique to the longitudinal axis and extending in a direction orthogonal to the straight line from the fluid injection nozzle toward the observation window. preferable.
  • the raised portion is provided between the fluid injection nozzle and the top portion, and a part of the fluid injected from the injection port is guided to the central portion of the observation window via the top portion. It is preferable to have a guide surface.
  • the second guide surface is preferably formed as a slope inclined toward the tip end side in the longitudinal axis direction toward the observation window from the fluid injection nozzle.
  • the pair of first guide surfaces and the second guide surface are connected to each other via a curved ridge line portion.
  • the pair of first guide surfaces and the second guide surface each include a streamlined curved surface.
  • the fluid guide portion preferably has a flat third guide surface between the top and the observation window.
  • the fluid guiding portion is formed in a trapezoidal shape in which the frontal shape when the fluid guiding portion is viewed from the longitudinal axis direction expands in a direction orthogonal to the straight line from the fluid injection nozzle toward the observation window. It is preferable to be done.
  • the fluid guide portion is a fourth guide surface that guides the fluid ejected from the injection port and deviated from the pair of first guide surfaces to both side portions of the observation window, and is longitudinal. It is preferable to have a fourth guide surface formed by a slope containing a component oblique to the axis and extending in a direction orthogonal to the straight line toward both sides.
  • the maximum inclination angle of each of the pair of first guide surfaces, the second guide surface, and the fourth guide surface with respect to the tip surface is ⁇
  • the maximum inclination angle of the second guide surface is ⁇
  • the pair of first guide surfaces it is preferable that the relationship is ⁇ > ⁇ > ⁇ .
  • the tip region on the tip side of the longitudinal axis of the opening region of the injection port is set to the fluid injection direction. It is preferable that the observation window is arranged on the extended first extension region, and the raised portion is arranged on the second extension region in which the proximal region on the proximal side of the longitudinal axis is extended in the fluid injection direction from the distal region. ..
  • an extension region extending the opening region of the injection port in the fluid injection direction is formed on the observation window inside the outer periphery of the observation window when the observation window is viewed from the front in the longitudinal axis direction. Is preferable.
  • the injection port has a widening portion in which the opening width widens in the direction orthogonal to the observation window.
  • the cleanability of both sides of the observation window can be improved.
  • FIG. 1 A perspective view showing the configuration of the tip surface of the insertion portion of the endoscope shown in FIG. Front view of the tip surface shown in FIG. Sectional view taken along the line IV-IV in FIG. Top view showing the fluid route of the fluid guided by the fluid guide Explanatory drawing which showed the maximum inclination angle of a plurality of guide surfaces constituting a fluid guide part
  • Cross-sectional view of the injection port, the raised part, and the observation window viewed from the direction orthogonal to the longitudinal axis.
  • FIG. 1 is an overall view of the endoscope 10 according to the embodiment of the present invention.
  • the endoscope 10 includes an insertion unit 12 inserted into a subject, an operation unit 14 provided at the base end of the insertion unit 12, and a light source device (not shown) for the endoscope 10.
  • a universal cable 16 for connecting to system components such as a processor device and an air supply / water supply device.
  • the insertion portion 12 has a tip, a base end, and a longitudinal axis A, and includes a soft portion 18, a curved portion 20, and a tip portion 22 in this order from the base end to the tip.
  • the flexible portion 18 has flexibility and can be curved in any direction along the insertion path of the insertion portion 12.
  • the curved portion 20 is curved in each of the vertical direction and the horizontal direction by operating the angle knobs 24 and 26 rotatably provided in the operating portion 14, and the direction in which the tip portion 22 faces can be changed in any direction. Is.
  • the tip portion 22 has a tip surface 28 (see FIG. 2) provided at the tip of the insertion portion 12.
  • FIG. 2 is an enlarged perspective view of the tip portion 22, and FIG. 3 is a front view of the tip portion 22 viewed from the longitudinal axis A (see FIG. 1) direction. Further, FIG. 4 is a cross-sectional view of the tip portion 22 along the IV-IV line of FIG.
  • the tip portion 22 is made of a hard material such as metal, and is made of a tip portion main body 30 for holding various parts arranged on the tip portion 22 and an insulating resin material. It has a tip surface 30A of the main body 30 and a tip cover 32 that covers the tip outer peripheral surface 30B.
  • the lens barrel 38 accommodating the observation window 34 and the optical system 36 constituting the observation unit and the fluid injection nozzle 40 are connected to each other.
  • the tip portion 42A of the air supply / water supply channel 42 is shown.
  • the tip surface 28 is formed on the surface on the tip side of the tip cover 32.
  • the tip surface 28 is formed based on a substantially circular flat surface perpendicular to the longitudinal axis A, and the tip surface 28 includes illumination windows 44 and 46, an observation window 34, a treatment tool outlet 48, and the above.
  • the fluid injection nozzle 40 of the above is arranged at a predetermined position.
  • Reference numeral C shown in FIGS. 2 and 3 indicates the center of the tip surface 28.
  • the illumination windows 44 and 46 are components of the illumination unit for illuminating the observed portion, and irradiate the observed portion with the illumination light sent from the above-mentioned light source device.
  • the circular surfaces 44S and 46S of the illumination windows 44 and 46 are formed by, for example, a flat surface and are arranged perpendicular to the longitudinal axis A.
  • the centers of the surfaces 44S and 46S are arranged at positions deviated from the center C of the tip surface 28 to the peripheral edge of the tip surface 28, and face each other with the center B of the surface 34S of the observation window 34 interposed therebetween. Placed in position.
  • the observation window 34 is a component of the observation unit for acquiring an image of the observed portion, and a solid-state image sensor (not shown) or a solid-state image sensor (not shown) allows the subject light from the observed portion to be transmitted through the optical system 36 shown in FIG. Import into the image guide.
  • the image taken by this observation unit is sent to the above-mentioned processor device as an observation image.
  • the circular surface 34S of the observation window 34 is formed of, for example, a flat surface and is arranged perpendicular to the optical axis D of the observation unit.
  • the center B of the surface 34S is arranged at a position deviated from the center C of the tip surface 28 to the peripheral edge of the tip surface 28.
  • the optical axis D is substantially parallel to the longitudinal axis A, and the center B is located on the optical axis D.
  • the treatment tool outlet 48 is communicated with the treatment tool introduction port 50 of the operation unit 14 via a treatment tool insertion channel (not shown) inserted inside the insertion unit 12 (see FIG. 1). Therefore, the treatment tool introduced from the treatment tool introduction port 50 is led out from the treatment tool outlet 48 via the treatment tool insertion channel described above.
  • a suction channel (not shown) is connected to the above-mentioned treatment tool insertion channel, and a suction operation from the treatment tool outlet 48 is performed via the suction channel by operating the suction button 54 of the operation unit 14 (see FIG. 1). Is done.
  • the fluid injection nozzle 40 has a base end portion 40A and a tip end portion 40B, and the shape including the base end portion 40A and the tip end portion 40B is L-shaped.
  • the base end portion 40A constitutes a connection portion connected to the tip end portion 42A of the air supply / water supply channel 42, and is connected to the above-mentioned air supply / water supply device via the air supply / water supply channel 42.
  • the conduit 41A of the base end portion 40A has a circular cross section perpendicular to the axis of the conduit 41A, and the circular center E is the tip surface with respect to the center C (see FIG. 3) of the tip surface 28. It is arranged at a position deviated from the peripheral edge of 28, and is arranged at a position close to the illumination window 46 among the illumination windows 44 and 46 in order to avoid interference with the treatment tool outlet 48.
  • the conduit 41B of the tip portion 40B has a rectangular cross section perpendicular to the axis of the conduit 41B, and an injection port 52 opened toward the observation window 34 is formed at the tip of the conduit 41B. ..
  • the injection port 52 is configured as a rectangular opening similar to the cross-sectional shape of the pipeline 41B.
  • the air supply / water supply device can be used. Gas is injected from the injection port 52 toward the surface 34S of the observation window 34. Then, when the air supply / water supply button 56 is pressed with the finger that closes the leak hole, the cleaning liquid from the air supply / water supply device is ejected from the injection port 52 toward the surface 34S of the observation window 34.
  • a cleaning liquid is sprayed from the injection port 52 to remove deposits such as blood or body fluid adhering to the surface 34S of the observation window 34, and then gas is discharged from the injection port 52.
  • the cleaning liquid remaining on the surface 34S or the like of the observation window 34 is removed by spraying.
  • the tip surface 28 is provided with a fluid guiding portion 60 that guides the fluid jetted from the injection port 52 to the observation window 34 or the like.
  • the fluid guiding portion 60 is provided between the fluid injection nozzle 40 and the observation window 34 on an extension of the rectangular opening region of the injection port 52 extending in the fluid injection direction.
  • the fluid guiding portion 60 is composed of a raised portion 62 that is raised from the tip surface 28 to the tip side in the longitudinal axis A direction.
  • the raised portion 62 has a top portion 64 formed on the tip side of the raised portion 62 in the longitudinal axis A direction. Further, as shown in FIG. 3, the raised portion 62 has a pair of first guide surfaces 66 and 68.
  • the pair of first guide surfaces 66, 68 are formed on both sides of the top 64 in the direction of the arrow H orthogonal to the straight line G connecting the center F of the opening region of the injection port 52 and the center B of the observation window 34, respectively. There is.
  • the pair of first guide surfaces 66, 68 guides a part of the fluid injected from the injection port 52 to both side portions 34A, 34B of the observation window 34 in the direction of arrow H on the surface 34S of the observation window 34. Functions as a surface.
  • FIG. 3 shows, as an example, a configuration in which the center C is located on the straight line G, but the present invention is not limited to this, and the configuration may be such that the center C is deviated from the straight line G.
  • the pair of first guide surfaces 66, 68 are formed by an inclined surface containing a component obliquely intersecting with the longitudinal axis A and extending from the straight line G in the arrow H direction from the fluid injection nozzle 40 toward the observation window 34. ing.
  • the above slope is an example, and may be composed of surfaces having other shapes as long as the fluid can be guided to both side portions 34A and 34B of the observation window 34.
  • the raised portion 62 has a second guide surface 70.
  • the second guide surface 70 is provided between the fluid injection nozzle 40 and the top 64, and guides a part of the fluid jetted from the injection port 52 to the central portion 34C of the observation window 34 via the top 64. Functions as a guide surface.
  • the second guide surface 70 is formed as a slope inclined toward the tip end side in the longitudinal axis A direction toward the observation window 34 from the fluid injection nozzle 40.
  • the above slope is an example, and may be composed of other surfaces as long as it has a shape that can guide the fluid to the central portion 34C of the observation window 34.
  • first guide surfaces 66 and 68 and the second guide surface 70 are connected to each other via curved ridges 72 and 74 (see FIG. 5). Further, the pair of first guide surfaces 66 and 68 and the second guide surface 70 are each composed of surfaces including a streamlined curved surface.
  • FIG. 5 is a plan view showing a plurality of fluid routes of the fluid guided by the fluid guiding unit 60 with arrows.
  • the fluid guiding portion 60 formed by the raised portion 62 is provided between the fluid injection nozzle 40 and the observation window 34 on the tip surface 28 of the insertion portion 12. Since a part of the fluid injected from the injection port 52 is guided to both side portions 34A and 34B of the observation window 34 by a pair of first guide surfaces 66 and 68 formed on both sides of the top portion 64, respectively. The cleanability of both side portions 34A and 34B of the observation window 34 can be improved.
  • the pair of first guide surfaces 66, 68 of the embodiment are formed by an inclined surface containing a component obliquely intersecting with the longitudinal axis A and expanding in the arrow H direction from the fluid injection nozzle 40 toward the observation window 34. Therefore, the fluid can be smoothly guided toward both side portions 34A and 34B of the observation window 34.
  • the fluid injected from the vicinity of the center F of the injection port 52 is the central portion of the observation window 34 via the top 64 by the second guide surface 70 as shown by the second fluid route 94 indicated by the arrow L. It is guided to 34C and flows to the central portion 34C. As a result, the central portion 34C of the observation window 34 is cleaned by the fluid flowing along the second fluid route 94.
  • the second guide surface 70 of the embodiment is formed as a slope inclined toward the tip end side in the longitudinal axis A direction toward the observation window 34 from the fluid injection nozzle 40, the fluid is observed in the central portion of the observation window 34. It can be smoothly guided toward 34C.
  • the pair of the first guide surfaces 66 and 68 and the second guide surfaces 70 are connected to each other via the curved ridge lines 72 and 74, the fluid flowing along the first fluid routes 90 and 92 can flow.
  • the ridges 72 and 74 smoothly flow from the second guide surface 70 toward the pair of first guide surfaces 66 and 68. Thereby, the fluid can be effectively guided toward both side portions 34A and 34B of the observation window 34.
  • first guide surfaces 66 and 68 include a streamlined curved surface
  • the fluid is smoothly guided from the pair of first guide surfaces 66 and 68 toward both side portions 34A and 34B of the observation window 34. be able to.
  • the second guide surface 70 also includes a streamlined curved surface, the fluid can be smoothly guided from the second guide surface 70 toward the central portion 34C of the observation window 34.
  • the first guide surfaces 66, 68 and the second guide surface 70 so as to include such a streamlined surface, the fluid vigorously collides with the pair of first guide surfaces 66, 68 and the second guide surface 70. Even in this case, it is possible to prevent the fluid from scattering, so that most of the fluid injected from the injection port 52 can be effectively used for cleaning the observation window 34.
  • the streamlined surface refers to, for example, a curved surface that smoothly bulges from the tip surface 28 toward the tip side of the longitudinal axis A.
  • the first guide surfaces 66, 68 and the second guide surface 70 are flat with the streamlined surface if the fluid can be smoothly guided to the observation window 34, in addition to the above-mentioned aspect composed of only the streamlined surface. It may be a surface formed by connecting the shaped surfaces.
  • a raised portion 62 having a configuration in which the top portion 64 is located on the straight line G is illustrated, but the aspect of the raised portion 62 is not limited to this.
  • the top 64 is deviated in the arrow H direction with respect to the straight line G. It may be an embodiment.
  • the raised portion 62 in which the top portion 64 is located on the straight line G is preferable because the fluid injected from the injection port 52 can be evenly branched to each of the pair of first guide surfaces 66 and 68.
  • the fluid guide unit 60 of the embodiment further includes the following configuration as a preferred embodiment.
  • the fluid guide unit 60 is provided with a flat third guide surface 76 in order to allow the fluid that has passed through the second guide surface 70 to flow smoothly toward the observation window 34.
  • the third guide surface 76 is formed between the top 64 and the observation window 34.
  • the third guide surface 76 is a surface orthogonal to the longitudinal axis A, and is formed on the tip side in the longitudinal axis A direction with respect to the tip surface 28 so as to be located on the same surface as the surface 34S of the observation window 34. Has been done.
  • the fluid flowing from the second guide surface 70 to the central portion 34C of the observation window 34 via the top 64 is directed to the central portion of the observation window 34 by the third guide surface 76. It can be smoothly guided to 34C.
  • the fluid guiding unit 60 has a guiding shape that guides the fluid injected from the injection port 52 to the entire area of the observation window 34. That is, the front shape of the fluid guiding portion 60 when viewed from the longitudinal axis A direction is formed in a trapezoidal shape that expands from the straight line G in the arrow H direction from the fluid injection nozzle 40 toward the observation window 34.
  • the fluid jetted from the injection port 52 can be effectively guided to the entire area of the observation window 34.
  • the fluid guiding unit 60 guides the fluids ejected from the injection port 52, which are separated from the pair of first guide surfaces 66 and 68, to the side portions 34A and 34B of the observation window 34. It has guide surfaces 82 and 84.
  • the fourth guide surfaces 82 and 84 include components that intersect the longitudinal axis A and are formed of slopes that extend in the direction of arrow H from the straight line G toward both side portions 34A and 34B. Further, the fourth guide surface 82 is connected to the first guide surface 66 and is formed toward both side portions 34A, and the fourth guide surface 84 is connected to the first guide surface 68 and is formed toward both side portions 34B. ing. Further, the fourth guide surfaces 82 and 84 are formed in an arc shape along the outer periphery of the observation window 34 when viewed from the front from the longitudinal axis A direction.
  • the fourth guide surfaces 82 and 84 By providing the fourth guide surfaces 82 and 84 in the fluid guiding portion 60, among the fluids injected from the injection port 52, the fluids deviating from the pair of first guide surfaces 66 and 68 in the arrow H direction are the fluids indicated by the arrows M and N. As shown by the third fluid routes 96 and 98 shown by, the fourth guide surfaces 82 and 84 guide the observation window 34 to both side portions 34A and 34B and flow to both side portions 34A and 34B. As a result, both side portions 34A and 34B can be washed together with the fluid flowing along the first fluid routes 90 and 92 indicated by arrows J and K, so that the cleanability of both side portions 34A and 34B is further improved.
  • the fourth guide surfaces 82 and 84 include components oblique to the longitudinal axis A and are formed of slopes extending in the direction of arrow H from the straight line G toward both side portions 34A and 34B, the pair of guide surfaces 82 and 84 are formed.
  • the fluid deviating from the surfaces 66 and 68 in the direction of arrow H can be smoothly guided toward both side portions 34A and 34B.
  • a pair of fourth guide surfaces 82, 84 is illustrated as the fourth guide surface, but the present invention is not limited to this, and at least one fourth of the pair of fourth guide surfaces 82, 84 is used. It suffices to have a guide surface. However, it is preferable to provide the pair of fourth guide surfaces 82 and 84 because both side portions 34A and 34B of the observation window 34 can be cleaned.
  • the maximum inclination angle of the pair of first guide surfaces 66 and 68, the second guide surfaces 70 and the fourth guide surfaces 82 and 84 with respect to the respective tip surfaces 28 improves the cleaning force by the fluid. It is set to a preferable angle. For example, a part of the fluid flowing on the second guide surface 70 is effectively branched toward the pair of first guide surfaces 66, 68, and the fluid flowing on the pair of first guide surfaces 66, 68 is seen on the observation window 34.
  • the pair of first guide surfaces 66, 68 and second The maximum inclination angles of the guide surface 70 and the fourth guide surfaces 82 and 84 are set.
  • the maximum tilt angle of the second guide surface 70 is ⁇
  • the maximum tilt angle of the pair of first guide surfaces 66, 68 is set.
  • each guide surface is configured so that the relationship is ⁇ > ⁇ > ⁇ .
  • the second guide surface 70 is a steep surface due to the above angular relationship, a part of the fluid vigorously flowing on the second guide surface 70 is effectively branched toward the pair of first guide surfaces 66 and 68. Can be done. Further, since the pair of first guide surfaces 66 and 68 are gentler than the second guide surfaces 70, the fluid flowing through the pair of first guide surfaces 66 and 68 is effectively applied to both side portions 34A and 34B of the observation window 34. Can be induced. Further, since the fourth guide surfaces 82 and 84 are gentler than the first guide surfaces 66 and 68, the fluid flowing through the fourth guide surfaces 82 and 84 can be effectively guided to both side portions 34A and 34B. ..
  • FIG. 7 shows a cross-sectional view of a main part of the tip portion 22 when the fluid injection nozzle 40, the raised portion 62, and the observation window 34 are viewed from a direction orthogonal to the longitudinal axis A.
  • the fluid injection nozzle 40, the observation window 34, and the raised portion 62 are included in the region extending the opening region of the injection port 52 in the fluid injection direction so that the observation window 34 and the raised portion 62 are included.
  • the positional relationship of is defined.
  • the observation window 34 is arranged on the first extension region P in which the tip region on the tip side of the longitudinal axis A of the opening region of the injection port 52 is extended in the fluid injection direction.
  • the raised portion 62 is arranged on the second extension region Q in which the proximal region on the proximal end side of the longitudinal axis A is extended in the fluid injection direction from the above-mentioned advanced region.
  • the top 64 of the raised portion 62 is arranged between the first extension region P and the second extension region Q in the longitudinal axis A direction so that the fluid flowing along the first extension region P does not collide with the top 64. It is configured.
  • the fluid jetted along the first extension region P can be directly jetted to the observation window 34.
  • the raised portion 62 is arranged on the second extension region Q, the fluid injected along the second extension region Q is supplied to the side portions 34A, 34B and the central portion 34C of the observation window 34 by the raised portion 62. Can be shed. As a result, the fluid can be effectively sprayed onto the entire observation window 34, so that the cleaning power of the observation window 34 can be further improved.
  • each part of the fluid guiding portion 60 has been described above, but in order to reduce the diameter of the insertion portion 12 in the endoscope 10 of the embodiment, the fluid injection nozzle 40 is also miniaturized. That is, as shown in FIG. 5, the extension region R in which the opening region of the injection port 52 is extended in the fluid injection direction is the observation window 34 on the observation window 34 when the observation window 34 is viewed from the longitudinal axis A direction. It is formed inside the outer circumference. In the fluid injection nozzle 40 having such a small injection port 52, it is difficult to directly flow the fluid through both side portions 34A and 34B of the observation window 34, but the endoscope 10 of the embodiment has a fluid guidance portion. Since the 60 is provided, the fluid can be effectively flowed through the side portions 34A and 34B of the observation window 34.
  • the injection port 52 has a widening portion 100 whose opening width expands in the direction of arrow H toward the observation window 34. As a result, the flow of the gas flowing along the third fluid routes 96 and 98 increases, so that the detergency of the side portions 34A and 34B is further improved.

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Abstract

L'invention concerne un endoscope ayant une fenêtre d'observation avec des côtés ayant une capacité de nettoyage améliorée. Un endoscope (10) présente une surface d'extrémité de pointe (28) au niveau de laquelle une partie de guidage de fluide (60) composé d'un renflement (62) est disposée entre une buse d'éjection de fluide (40) et une fenêtre d'observation (34), une partie d'un fluide éjecté d'une ouverture d'éjection (52) étant guidée vers les deux côtés (34A, 34B) de la fenêtre d'observation (34) au moyen d'une paire de premières surfaces de guidage (66, 68) formées respectivement sur les deux côtés de la partie supérieure (64) du renflement (62).
PCT/JP2020/043571 2019-11-29 2020-11-24 Endoscope WO2021106830A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN202080079986.XA CN114746004A (zh) 2019-11-29 2020-11-24 内窥镜
JP2021561397A JP7289369B2 (ja) 2019-11-29 2020-11-24 内視鏡

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Application Number Priority Date Filing Date Title
JP2019-217202 2019-11-29
JP2019217202 2019-11-29

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WO2021106830A1 true WO2021106830A1 (fr) 2021-06-03

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PCT/JP2020/043571 WO2021106830A1 (fr) 2019-11-29 2020-11-24 Endoscope

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JP (1) JP7289369B2 (fr)
CN (1) CN114746004A (fr)
WO (1) WO2021106830A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
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