Endoscope

Abstract

The present invention addresses the problem of providing an endoscope capable of reliably cleaning or disinfecting a stand housing section by means of a simple configuration. An endoscope is provided with: a tip section (10) in which a stand housing section (34) is formed; an erecting table (30) arranged in the erecting table accommodating part (34); and a treatment tool insertion channel (50) that communicates with a treatment tool outlet (58) that opens to the stand housing section (34), the treatment tool insertion channel (50) having an expanded-diameter section (56) that expands in diameter toward the treatment tool outlet (58).

Description

Technical Field

[0001] The present invention relates to an endoscope, and in particular to an endoscope provided with a standing platform. Background Art

[0002] In an endoscope, various treatment instruments are inserted into a treatment instrument insertion port provided in an operation portion, and the treatment instruments are led out from a treatment instrument outlet opened at the front end. The treatment instruments led out from the treatment instrument outlet are used to collect or treat tissues in the subject. For example, treatment instruments such as guide wires and contrast tubes are used in duodenoscopes, and treatment instruments such as puncture needles are used in ultrasonic endoscopes.

[0003] The treatment tool as described above is displaced or bent so as to face a desired position in the subject for treatment. Therefore, a treatment tool erecting mechanism (erecting stand) for changing the direction in which the treatment tool is led out is provided at the distal end of the endoscope.

[0004] In an endoscope equipped with a standing stand as described above, the body fluid of the subject (for example, tissue fluid, blood or digestive fluid, etc.) sometimes seeps into the standing stand accommodating portion that accommodates the standing stand. Therefore, each time the endoscope is used, it needs to be cleaned and disinfected. Here, in the cleaning of the endoscope, for example, functional water such as strongly acidic electrolyzed water or ozone water or water or other cleaning fluids are used. In addition, in the disinfection of the endoscope, for example, a disinfectant such as a high-level disinfectant (glutaraldehyde, o-phthalaldehyde or peracetic acid) is used. In the following description, the cleaning fluid or disinfectant is recorded as a liquid for cleaning or disinfection.

[0005] When cleaning and disinfecting the stand accommodating portion, since the stand and other instruments disposed inside the stand accommodating portion hinder the flow of the cleaning or disinfecting liquid, there may be areas that are not adequately cleaned and disinfected. In the endoscope described in Patent Document 1, in order to prevent the occurrence of areas that are not adequately cleaned and disinfected, a liquid inlet (hereinafter referred to as a liquid injection port) and a liquid outlet (hereinafter referred to as a liquid discharge port) are formed on the wall surface of the stand accommodating portion. And, the liquid is injected into the stand accommodating portion from the liquid injection port and discharged from the liquid discharge port. More specifically, in Patent Document 1, a liquid injection port is formed toward the stand disposed in the stand accommodating portion, and a liquid discharge port is formed on the wall surface on the lower side of the stand, thereby allowing the liquid to flow to the lower side of the stand, preventing incomplete cleaning and disinfection of the lower side of the stand.

[0006] Patent Document 1: International Publication No. 2018 / 145433

[0007] As described in Patent Document 1, when a liquid injection port is provided on the wall surface of the stand accommodating portion, body fluid can also penetrate into the liquid injection path through the liquid injection port opening to the stand accommodating portion. Therefore, the liquid injection port and the liquid injection path also need to be cleaned and disinfected.

[0008] However, as described above, since the liquid injection port is formed toward the stand, the stand becomes an obstacle to cleaning and disinfecting the liquid injection port and the liquid injection path. For example, when the cleaning brush is inserted into the liquid injection path and pulled out to the side opposite to the insertion side for cleaning, the stand becomes an obstacle to the operation of the cleaning brush.

[0009] Furthermore, in the endoscope described in Patent Document 1, a space is required to provide a liquid injection path, so that the size (diameter) of the distal end portion of the endoscope inserted into the body cavity of the subject becomes large. Summary of the invention

[0010] 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 reliably performing cleaning or disinfection of a standing table accommodating portion with a simple structure.

[0011] The endoscope involved in the first embodiment of the present invention comprises: a front end portion, in which a stand accommodating portion is formed; a stand, which is arranged in the stand accommodating portion; and a treatment instrument insertion channel, which is connected to a treatment instrument outlet opening to the stand accommodating portion, and the treatment instrument insertion channel has an expanded diameter portion that expands toward the treatment instrument outlet.

[0012] The endoscope involved in the second embodiment of the present invention, in the first embodiment, has a wire insertion channel for inserting an operating wire, the wire insertion channel and the upright platform are arranged on opposite sides of each other with a partition wall between them, and a through hole is provided on the partition wall that passes through the side where the wire insertion channel is arranged and the side where the upright platform is arranged, and the endoscope has a power transmission component, the power transmission component is inserted through the through hole, one end of which is connected to the upright platform and the other end is connected to the operating wire.

[0013] The endoscope according to the third aspect of the present invention is characterized in that in the second aspect, the power transmission member includes: a rotation shaft having one end connected to the erection base; and an erection rod provided at the other end of the rotation shaft and connected to the operation wire.

[0014] The endoscope according to a fourth aspect of the present invention includes, in the first aspect, a wire insertion channel through which the operation wire is inserted, the erecting table is rotatably disposed in the erecting table accommodating portion, and the operation wire is connected to the erecting table.

[0015] The endoscope involved in the fifth embodiment of the present invention is characterized in that, in any one of the first to fourth embodiments, an opening portion is provided in the standing table accommodating portion, the opening portion is opened in a first direction having a component of a direction orthogonal to the opening direction of the disposal instrument outlet, and in a cross section of the expanded diameter portion along a plane determined by the opening direction of the disposal instrument outlet and the first direction, an extension line of the bottom of the expanded diameter portion on the second direction side opposite to the first direction is located at a position closer to the second direction side than the rotation axis of the standing table.

[0016] The endoscope involved in the sixth aspect of the present invention is characterized in that, in any one of the first to fifth aspects, an opening portion is provided in the standing platform accommodating portion, the opening portion is opened in a first direction having a component of a direction orthogonal to the opening direction of the disposal instrument outlet, the standing platform has a disposal instrument guide surface for guiding the disposal instrument led out from the disposal instrument outlet toward the opening portion, and in a cross section of a disposal instrument insertion channel along a plane determined by the opening direction of the disposal instrument outlet and the first direction, in a connection portion connected to the base end side of the expanded diameter portion in the disposal instrument insertion channel, an extension line of the bottom on the second direction side opposite to the first direction intersects with the disposal instrument guide surface.

[0017] In the endoscope according to a seventh aspect of the present invention, in any one of the first to sixth aspects, the treatment instrument outlet also serves as a liquid supply port for supplying a cleaning or disinfecting liquid to the standing table.

[0018] The endoscope according to the eighth aspect of the present invention is characterized in that, in the seventh aspect, the standing table has a liquid guide surface that guides the liquid supplied to the standing table in a direction of a rotation axis on which the standing table is provided.

[0019] In the endoscope according to the ninth aspect of the present invention, in the eighth aspect, when the standing base is in the standing state, the liquid guide surface is provided at a position facing the treatment instrument outlet.

[0020] Effects of the Invention

[0021] According to the present invention, by providing the diameter-enlarging portion that enlarges the diameter from the treatment instrument insertion passage toward the treatment instrument outlet, the standing table accommodating portion can be reliably cleaned or disinfected. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is an exploded perspective view showing the distal end portion of the endoscope according to the first embodiment of the present invention.

[0023] Figure 2 It is a perspective cross-sectional view showing the distal end portion of the endoscope according to the first embodiment of the present invention.

[0024] Figure 3It is a cross-sectional view showing the distal end portion of the endoscope according to the first embodiment of the present invention in comparison with a comparative example.

[0025] Figure 4 It is a diagram showing a modified example of the expanded diameter portion.

[0026] Figure 5 It is a cross-sectional view showing the distal end portion of an endoscope according to a second embodiment of the present invention.

[0027] Explanation of symbols

[0028] 10-front end portion, 12-frame portion, 14-front end cover, 16-opening portion, 20-illumination window, 22-observation window, 24-air and water supply nozzle, 30-standing platform, 30A-standing platform, 30G-treatment instrument guide surface, 30G1-first surface, 30G2-second surface, 32-rotation axis insertion hole, 34-standing platform accommodating portion, 36-liquid discharge port, 50-treatment instrument insertion passage, 52-insertion portion, 54-connecting portion, 56-enlarged diameter portion, 56 a-expanded portion, 56b-expanded portion, 56c-expanded portion, 58-disposal instrument outlet, 60-partition wall, 62-through hole, 64-wire insertion channel, 70-rising rod, 72-rotating axis, 74-operating wire, EX1-extension wire, EX1a-extension wire, EX1b-extension wire, EX1c-extension wire, EX2-extension wire, AX-axis, AXa-axis, 10C-front end portion, 40C-liquid supply channel, 50C-disposal instrument insertion channel. DETAILED DESCRIPTION

[0029] Hereinafter, embodiments of the endoscope according to the present invention will be described with reference to the drawings.

[0030] [First embodiment]

[0031] The endoscope according to the present embodiment includes an operation portion that is held by an operator to perform various operations, and an insertion portion that is inserted into a body cavity of a subject (patient). The operation portion and the insertion portion are not shown in the drawings.

[0032] The insertion portion is in the shape of a strip extending from the front end of the operation portion, and includes, in order from the operation portion side (base end side), a flexible soft portion, a bending portion that is bent by operating the angle button of the operation portion, and a front end portion.

[0033] The operation portion is provided with a treatment tool introduction port for inserting a treatment tool, and the front end portion of the insertion portion is provided with a treatment tool outlet for leading out the treatment tool. The treatment tool introduction port and the treatment tool outlet are connected via a treatment tool insertion channel.

[0034] Next, the distal end portion of the endoscope will be described. Figure 1 and Figure 2 These are diagrams (an exploded perspective view and a perspective sectional view, respectively) showing a distal end portion of an endoscope according to a first embodiment of the present invention.

[0035] like Figure 1 As shown, the front end portion 10 includes: a frame portion 12, which forms the outer wall and the inner partition of the front end portion 10; and a front end cover 14, which is installed at the front end of the frame portion 12 and forms a part of the outer wall of the front end portion 10. The frame portion 12 and the front end cover 14 are formed of a metal material such as stainless steel.

[0036] The frame portion 12 is provided with: an illumination window 20 for illuminating the inside of the subject by means of illumination light guided from a light source not shown in the figure to the frame portion 12; an observation window 22 for photographing the inside of the subject using an imaging element housed in the frame portion 12; and an air and water supply nozzle 24 for delivering gas or liquid to the observation window 22.

[0037] like Figure 2 As shown, a standing stand accommodating portion 34 for accommodating the standing stand 30 is formed in the frame portion 12 .

[0038] The erection stand 30 is formed of a metal material such as stainless steel, and is installed to be rotatable around the axial direction of the rotation shaft 72 described later. In the following description, the direction along the axial direction of the rotation shaft 72 is referred to as the X direction, the direction in which the erection stand 30 is erected and laid down is referred to as the Z direction (up and down direction), and the direction orthogonal to the ZX direction is referred to as the Y direction. Here, the +Z direction and the -Z direction correspond to the first direction and the second direction, respectively.

[0039] like Figure 1 As shown, an opening 16 is formed in the frame body 12. The opening 16 is formed in the +Z direction (first direction, upward direction) and has a component in a direction (Z direction) orthogonal to the opening direction of the treatment instrument outlet 58. The treatment instrument led out from the treatment instrument insertion channel 50 to the treatment instrument outlet 58 is guided in the direction of the opening 16 by the standing table 30 in the standing table accommodating portion 34, and is led out from the opening 16 into the subject.

[0040] The frame body 12 is provided with a partition wall 60 constituting the +X side wall surface of the erecting stand accommodating portion 34 . The partition wall 60 is provided with a through hole 62 penetrating the side where the wire insertion passage 64 is arranged and the side where the erecting stand 30 is arranged.

[0041] The erection rod 70 is formed with a rotating shaft 72 via a bent portion at one end thereof, and an operation wire 74 is connected to the other end. The rotating shaft 72 is inserted through the through hole 62 formed in the partition wall 60, and is inserted into the rotating shaft insertion hole 32 of the erection stand 30 in a manner that is non-rotatable relative to each other. The erection rod 70 and the rotating shaft 72 function as a power transmission member. Hereinafter, the rotating shaft 72 when inserted into the rotating shaft insertion hole 32 of the erection stand 30 is also referred to as the rotating shaft 72 of the erection stand 30.

[0042] The operation wire 74 is inserted through the wire insertion channel 64 formed on the -Y side (base end side) of the frame body 12, and is connected to the erection operation lever (not shown) of the operation portion of the endoscope. Figure 1 As shown, the wire insertion passage 64 and the rising stand 30 are arranged on opposite sides of each other with the partition wall 60 interposed therebetween.

[0043] A treatment instrument outlet 58 is formed in the stand accommodating portion 34. Figure 2 As shown in FIG. 1 , the treatment tool outlet 58 opens to the +Y side (front end side) of the erection table accommodating portion 34. As described above, the treatment tool outlet 58 communicates with the treatment tool introduction port of the operation portion via the treatment tool insertion channel 50 inserted into the insertion portion of the endoscope. The treatment tool outlet 58 also serves as a liquid supply port for supplying a cleaning or disinfecting liquid to the erection table 30.

[0044] When observing or treating the inside of the subject, the front end portion 10 is inserted into the subject, and the treatment instrument inserted from the treatment instrument introduction port is led out from the treatment instrument outlet 58 to the standing table accommodating portion 34. The operator can move the standing table 30 between the standing state (standing position) and the lying state (lying position) by operating the standing operation lever of the operation portion, thereby changing the leading direction (leading angle) of the treatment instrument.

[0045] On the other hand, when cleaning or disinfecting the endoscope, a cleaning or disinfecting liquid is injected from the treatment instrument introduction port of the operation portion. The cleaning or disinfecting liquid is supplied from the treatment instrument outlet 58 to the stand accommodating portion 34 through the treatment instrument insertion channel 50. A liquid discharge port 36 opening to the -Z side (the second direction, the downward direction) is provided in the stand accommodating portion 34. The liquid discharge port 36 is formed to penetrate either or both of the frame portion 12 and the front end cover 14 of the front end portion 10 according to its formation position. The cleaning or disinfecting liquid is discharged to the outside of the stand accommodating portion 34 via the liquid discharge port 36.

[0046] In addition, Figure 2In the example shown, the liquid discharge port 36 is provided at one location downwardly on the opposite side (+Y side, front end side) of the stand accommodating portion 34 relative to the treatment device outlet 58 also serving as the liquid supply port, but the arrangement, number and orientation of the liquid discharge port 36 are not limited to this example. The liquid discharge port 36 may be provided in plurality, or may be provided on a diagonal line relative to the treatment device outlet 58 depending on the shape of the stand accommodating portion 34.

[0047] like Figure 2 As shown, an enlarged diameter portion 56 is formed on the +Y side (front end side) of the treatment instrument insertion passage 50, which is enlarged (enlarged in diameter) toward the treatment instrument outlet 58. The diameter of the enlarged diameter portion 56 is the largest at the treatment instrument outlet 58. In addition, the enlarged diameter portion 56 is not formed by chamfering the treatment instrument insertion passage 50, that is, by cutting off the corner portion between the treatment instrument insertion passage 50 and the stand accommodating portion 34, but is formed as described later, preferably in a manner that satisfies conditions A and B.

[0048] The portion (insertion portion 52) other than the enlarged diameter portion 56 on the -Y side (operation portion side, base end side) of the treatment instrument insertion channel 50 and the portion connected to the enlarged diameter portion 56 is defined as the connection portion 54. In the connection portion 54, the diameter of the enlarged diameter portion 56 is equal to the diameter of the insertion portion 52. Figure 2 In the example shown, the enlarged diameter portion 56 has the smallest diameter in the connecting portion 54. Figure 2 In the example shown, the expanded diameter portion 56 has a substantially conical shape (an oblique conical shape), but the shape of the expanded diameter portion 56 is not limited to Figure 2 Example shown.

[0049] By providing such an enlarged diameter portion 56 , the treatment tool outlet 58 also serving as a liquid supply port is larger than the treatment tool insertion passage 50 , so that the cleaning or disinfecting liquid can be supplied to a wide range of the standing table accommodating portion 34 .

[0050] Furthermore, in the present embodiment, it is preferable that the distal end portion 10 be configured so as to satisfy the following condition A or B.

[0051] (Condition A)

[0052] In the cross section of the treatment instrument insertion channel 50 along the plane (YZ plane) defined by the Y direction (opening direction of the treatment instrument outlet 58) and the Z direction (up and down direction), the extension line of the bottom of the enlarged diameter portion 56 on the -Z direction (second direction) side is set as EX1. Figure 2As shown, the expanded diameter portion 56 is formed so that the extension line EX1 of the bottom thereof is located at a position closer to the -Z direction (second direction) side than the rotating shaft 72 (rotating shaft insertion hole 32) of the erecting table 30. Thus, it is possible to supply a cleaning or disinfecting liquid to, for example, the connection portion of the rotating shaft 72 when the rotating shaft 72 is inserted into the rotating shaft insertion hole 32 of the erecting table 30 (including the gap between the rotating shaft 72 and the rotating shaft insertion hole 32), a sealing member (for example, an O-ring) provided between the through hole 62 of the partition wall 60 and the rotating shaft 72, or the lower surface of the erecting table 30.

[0053] (Condition B)

[0054] In the cross section of the treatment instrument insertion channel 50 along the YZ plane, the extension line of the bottom of the connecting portion 54 on the -Z direction (second direction) side is set as EX2. Figure 2 As shown in FIG. 1 , the positions of the insertion portion 52 and the stand 30 are adjusted so that the extension line EX2 intersects the treatment instrument guide surface 30G of the stand 30. That is, the treatment instrument guide surface 30G is located on the extension line EX2 or slightly closer to the -Z direction (second direction) side than the extension line EX2. Thus, even when the enlarged diameter portion 56 is provided, the treatment instrument can be smoothly guided.

[0055] Figure 3 It is a cross-sectional view showing the endoscope according to the first embodiment of the present invention by comparison with the endoscope according to the comparative example.

[0056] like Figure 3 As shown, in the front end portion 10C of the endoscope involved in the comparative example, in addition to the treatment instrument insertion channel 50C, a liquid supply channel 40C for supplying a cleaning or disinfecting liquid is provided to supply liquid to the lower side of the standing table. In order to provide this liquid supply channel 40C, the dimension of the front end portion 10C involved in the comparative example in the Z direction becomes larger.

[0057] In contrast, in the distal end portion 10 of the endoscope according to the present embodiment, the expanded diameter portion 56 is provided, so that the cleaning or disinfecting liquid can be supplied to the lower side of the erecting table 30 without providing a dedicated liquid supply passage 40C. Therefore, according to the present embodiment, the erecting table accommodating portion 34 can be reliably cleaned or disinfected with a simpler structure without increasing the diameter of the distal end portion 10 of the endoscope.

[0058] (Variation of the Expanded Diameter Portion)

[0059] In addition, the enlarged diameter portion 56 involved in this embodiment is set to be substantially conical (truncated cone), but the present invention is not limited to this. In addition, the enlarged diameter portion 56 can be asymmetric, and the axis (central axis) of the enlarged diameter portion 56 can also be offset relative to the axis AX of the insertion portion 52 (for example, it can also be displaced up and down).

[0060] Figure 4 It is a diagram showing a modified example of the expanded diameter portion.

[0061] This is an example in which the enlarged diameter portion 56a according to the modification (a) is made into a non-axisymmetric shape. Specifically, the enlarged diameter portion 56a according to the modification (a) is an oblique circular conical surface shape, but may be other non-axisymmetric shapes.

[0062] In the modification (a), for example, the slope of the axis AXa of the enlarged diameter portion 56a having an oblique conical surface shape can be adjusted (for example, it can be inclined toward the rotation axis 72 side of the erecting table 30) according to the positional relationship between the insertion portion 52 of the treatment instrument insertion channel 50 and the rotation axis 72 (rotation axis insertion hole 32) of the erecting table 30. Thus, as in the above-mentioned embodiment, the extended line EX1a of the longer main generatrix of the enlarged diameter portion 56a can be located at a position closer to the -Z direction (second direction) side than the rotation axis 72 of the erecting table 30 (condition A).

[0063] For example, the following case is considered: due to the arrangement of the components of the front end portion 10 or the shape of the rising base 30, it is difficult to satisfy the conditions A and B in the axisymmetric expanded diameter portion 56. Even in this case, by adopting the expanded diameter portion 56a of a non-axisymmetric shape, the conditions A and B can be satisfied, and the degree of freedom in designing the front end portion 10 is improved.

[0064] The cross-sections of the expanded diameter portions 56b and 56c in the YZ direction according to the modified examples (b) and (c) are curved surfaces. Here, the shapes of the expanded diameter portions 56b and 56c may be, for example, a rotation surface, a parabola, or a hyperbolic surface.

[0065] In the modified examples (b) and (c), the cross-sectional shape is a curve. In this case, the extension lines of the bottoms of the expanded diameter portions 56b and 56c can be set as tangent lines EX1b and EX1c in the cross sections of the bottoms of the expanded diameter portions 56b and 56c.

[0066] In the modified examples (b) and (c), the central axes of the enlarged diameter portions 56b and 56c may be offset or inclined relative to the central axis AX of the insertion portion 52, depending on the positional relationship between the insertion portion 52 of the treatment instrument insertion channel 50 and the rotation axis 72 (rotation axis insertion hole 32) of the upright stand 30. Furthermore, the enlarged diameter portions 56b and 56c may be formed in a non-axisymmetric shape.

[0067] As shown in modifications (a) to (c), the design freedom of the front end portion 10 is improved because the expanded diameter portion (56a, 56b and 56c) can be selected based on the positional relationship between the insertion portion 52 of the treatment instrument insertion channel 50 and the rotating shaft 72 (rotating shaft insertion hole 32) of the upright platform 30.

[0068] [Second embodiment]

[0069] Figure 5 It is a cross-sectional view showing the distal end portion of an endoscope according to a second embodiment of the present invention. Figure 5 The state where the standing stand 30A is in the standing position is shown.

[0070] The erection stand 30A of the present embodiment includes a first surface 30G1 and a second surface 30G2 facing different directions from each other. The first surface 30G1 and the second surface 30G2 are also referred to as liquid guide surfaces. By providing the first surface 30G1 and the second surface 30G2, the cleaning or disinfecting liquid supplied from the disposal device outlet 58 can flow toward both sides of the opening 16 side and the rotating shaft 72 (rotating shaft insertion hole 32) side.

[0071] like Figure 5 As shown, when the stand 30 is in the standing position, the first surface 30G1 and the second surface 30G2 are arranged on the inner side (-Z) of the opposite area opposite to the disposal instrument outlet 58. The first surface 30G1 is formed to face obliquely upward relative to the axis AX of the insertion portion 52 of the disposal instrument insertion channel 50, and the second surface 30G2 is formed to face obliquely downward relative to the axis AX of the insertion portion 52 of the disposal instrument insertion channel 50. That is, the first surface 30G1 is inclined toward the opening 16 side of the stand accommodating portion 34, so that the liquid in contact with the first surface 30G1 can be guided to the opening 16 side of the stand accommodating portion 34. In addition, the second surface 3062 is inclined toward the rotation axis 72 side of the stand 30A, so that the liquid in contact with the second surface 30G2 can be guided to the rotation axis 72 side of the stand 30A.

[0072] According to the present embodiment, by providing the liquid guide surfaces (the first surface 30G1 and the second surface 30G2 ) on the standing stage 30A, the standing stage housing portion 34 can be cleaned or disinfected more reliably.

[0073] In addition, the shape of the liquid guide surface is not limited to Figure 5 The example shown. The liquid guide surface may include, for example, a plurality of surfaces whose direction of guiding the liquid is adjusted according to the configuration of the components of the front end portion 10. For example, for a component that becomes an obstacle to the flow of the liquid, a plurality of liquid guide surfaces capable of guiding the liquid may be included in the area on the opposite side of the disposal device outlet 58.

[0074] Furthermore, in the above-described embodiments, the diameter-enlarged portion 56 is enlarged in both the ±Z directions (up and down directions), but may be enlarged only in the -Z direction (the second direction).

[0075] Furthermore, in each of the above-mentioned embodiments, the erection stand 30 is operated via the erection rod 70, but the present invention is not limited thereto. For example, the above-mentioned embodiments can also be applied to an endoscope of a type in which the operating wire 74 is directly connected to the erection stand 30 without providing the partition wall 60 or to other types of endoscopes (for example, Japanese Patent Publication No. 11-299728, Japanese Patent Publication No. 2012-040258, and International Publication No. 2021 / 033641).

Claims

1. An endoscope comprising: The front end portion is formed with a stand accommodating portion; A standing platform, disposed in the standing platform accommodating portion; and The treatment instrument insertion passage is connected to the treatment instrument outlet opening to the rising platform accommodating portion. The treatment instrument insertion passage has an expanded diameter portion that expands toward the treatment instrument outlet.

2. The endoscope according to claim 1, wherein: The endoscope includes a wire insertion channel for inserting an operation wire. The wire insertion passage and the rising platform are arranged on opposite sides of each other with a partition wall therebetween. The partition wall is provided with a through hole penetrating between the side where the wire insertion passage is arranged and the side where the rising platform is arranged. The endoscope includes a power transmission member that is inserted into the through hole and has one end connected to the rising base and the other end connected to the operation wire.

3. The endoscope according to claim 2, wherein: The power transmission component comprises: A rotating shaft, one end of which is connected to the standing platform; and The erection rod is provided on the other end side of the rotation shaft and is connected to the operation wire.

4. The endoscope according to claim 1, wherein: The endoscope includes a wire insertion channel for inserting an operation wire. The erecting platform is rotatably arranged in the erecting platform storage portion, The operation wire is connected to the raising platform.

5. The endoscope according to any one of claims 1 to 4, wherein: The rising platform accommodating portion is provided with an opening portion, the opening portion opening in a first direction having a component of a direction orthogonal to an opening direction of the treatment instrument outlet, In a cross section of the expanded portion along a plane defined by the opening direction of the disposal instrument outlet and the first direction, an extension line of the bottom of the expanded portion on a second direction side opposite to the first direction is located closer to the second direction side than the rotation axis of the standing platform.

6. The endoscope according to any one of claims 1 to 4, wherein: The rising platform accommodating portion is provided with an opening portion, the opening portion opening in a first direction having a component of a direction orthogonal to an opening direction of the treatment instrument outlet, The standing platform has a treatment tool guide surface for guiding the treatment tool led out from the treatment tool outlet toward the opening. In a cross section of the disposal instrument insertion channel along a plane determined by the opening direction of the disposal instrument outlet and the first direction, in a connection portion connected to the base end side of the expanded diameter portion in the disposal instrument insertion channel, an extension line of the bottom on the second direction side opposite to the first direction intersects with the disposal instrument guide surface.

7. The endoscope according to any one of claims 1 to 4, wherein: The treatment tool outlet also serves as a liquid supply port for supplying a cleaning or disinfecting liquid to the standing table.

8. The endoscope according to claim 7, wherein: The standing table has a liquid guide surface that guides the liquid supplied to the standing table in a direction of a rotation axis on which the standing table is provided.

9. The endoscope according to claim 8, wherein: When the standing base is in the standing state, the liquid guide surface is provided at a position facing the treatment tool outlet.

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