Endoscope

Abstract

The present invention addresses the problem of providing an endoscope capable of improving the cleanability of the tip section of an endoscope insertion section. An endoscope according to the present invention is provided with: a tip section (10) having a stand housing chamber (28) and a rod housing chamber (56); an erecting table (26) accommodated in the erecting table accommodating chamber (28); a rod (54) accommodated in the rod accommodating chamber (56); an operation cable (66) connected to the rod (54); a first partition wall (22) that is provided to the tip section (10) and that partitions the stand housing chamber (28) and the rod housing chamber (56); a rotating shaft (50) connecting the standing table (26) and the rod (54); a through-hole (52) which is provided in the first partition wall (22) and through which the rotating shaft (50) is inserted; and a sealing member (80) that is attached to the rotating shaft (50), seals the through hole when the rotating shaft (50) is inserted through the through hole (52), and is attachable and detachable from the rod housing chamber side.

Description

Technical Field

[0001] The present invention relates to an endoscope, and more particularly to an endoscope having a standing platform at a distal end portion of an endoscope insertion portion. Background Art

[0002] In an endoscope, various treatment instruments are inserted from a treatment instrument introduction port provided in the operation part, and are led out from a treatment instrument lead-out port opened at the front end of the insertion part for treatment. For example, in a duodenoscope, treatment instruments such as a guide wire or a molding hose are used. Such treatment instruments need to change the lead-out direction at the front end of the insertion part in order to treat the desired position in the subject, so a treatment instrument erection mechanism (erecting platform) is provided at the front end.

[0003] As a treatment instrument standing mechanism, the following mechanism (open type) is known: a cable is set on the standing platform and the cable is extended to the operating part of the endoscope, and the cable is pushed and pulled by an operating lever provided in the operating part to swing the standing platform around the rotation axis, thereby changing the position between the standing position and the lying position.

[0004] In addition, the following mechanism (closed type) is also known: the rotation axis of the standing platform is connected to a rod housed across the partition, a cable is set on the rod, and the cable is pushed and pulled by an operating lever of an operating unit to swing the standing platform around the rotation axis, thereby changing the position between the standing position and the lying position.

[0005] The shape and structure of the front end portion provided with such a treatment tool erecting mechanism are complicated, and therefore, it is required to improve the cleaning performance with a cleaning liquid.

[0006] Patent document 1 discloses an endoscope having a closed type treatment instrument erecting mechanism, wherein a cleaning channel is formed between a through hole provided in a partition wall and a rotating shaft inserted through the through hole. According to the endoscope of patent document 1, a cleaning liquid flows into the cleaning channel and reaches the side of the erecting platform, thereby cleaning the rotating shaft, the through hole, and the side of the erecting platform.

[0007] Patent Document 1: Chinese Utility Model Specification No. 209951207

[0008] The endoscope of Patent Document 1 has a stand accommodating portion and a rod accommodating portion separated by a partition wall at the front end of the endoscope insertion portion, and a rotating shaft is inserted through a through hole provided in the partition wall to connect the stand and the rod. A cleaning channel for flowing cleaning fluid is formed between the through hole and the rotating shaft.

[0009] Therefore, when the endoscope of Patent Document 1 is used, liquids such as body fluids that penetrate into the erection table storage portion are likely to penetrate into the rod storage portion through the above-mentioned cleaning channel. Therefore, the rod and the cable, etc., which are stored in the rod storage portion, may be contaminated by the above-mentioned liquid. In this case, since the rod and the cable, etc. must be disassembled from the front end portion and cleaned, there is a problem that the cleaning work becomes cumbersome and it is difficult to perform complete cleaning. 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 improving the cleanability of the distal end portion of an endoscope insertion portion.

[0011] The endoscope involved in the first embodiment comprises: a front end portion, having a standing platform accommodating portion and a rod accommodating portion; the standing platform, which is accommodated in the standing platform accommodating portion; the rod, which is accommodated in the rod accommodating portion; a cable connected to the rod; a partition wall, which is arranged at the front end portion and separates the standing platform accommodating portion and the rod accommodating portion; a rotating shaft, which connects the standing platform and the rod; a first through hole, which is arranged in the partition wall and through which the rotating shaft is inserted; and a sealing component, which is installed on the rotating shaft and seals the first through hole when the rotating shaft is inserted into the first through hole, and can be freely loaded and unloaded from the rod accommodating portion side.

[0012] The endoscope according to the second aspect is characterized in that, in the first aspect, the rod includes a second through hole through which the rotating shaft is inserted.

[0013] The rotating shaft has a planar side portion and a curved arc portion which are parallel to the axial direction of the rotating shaft.

[0014] The arc portion is in sliding contact with the inner surface of each of the first through hole and the second through hole.

[0015] A gap is provided between the side portion and the inner surface of each of the first through hole and the second through hole,

[0016] The sealing member is embedded in the gap.

[0017] The endoscope according to the third aspect is characterized in that, in the second aspect, the sealing member includes: a base portion fitted to the rod so as to be non-rotatable relative to the rod; and a protrusion portion protruding from the base portion, the protrusion portion being fitted into the gap portion.

[0018] The endoscope according to a fourth aspect is characterized in that, in the third aspect, the base portion includes a fitting hole that is fitted to be non-rotatable relative to the rotation axis.

[0019] The endoscope according to the fifth aspect, in the first aspect, comprises: a first rotation axis provided on the standing table and constituting the rotation axis; and

[0020] a second rotation axis, which is disposed on the rod and constitutes a rotation axis,

[0021] A fitting portion is provided on one of the first rotating shaft and the second rotating shaft, and a fitted portion that fits with the fitting portion is provided on the other rotating shaft different from the one rotating shaft.

[0022] The endoscope according to a sixth aspect is characterized in that, in the fifth aspect, the sealing member is attachable to and detachable from at least the second rotating shaft.

[0023] In the endoscope according to the seventh aspect, in the fifth aspect or the sixth aspect, a knob portion is protrudingly provided at an end portion of the seal member on the rod accommodation portion side.

[0024] The endoscope according to an eighth aspect is characterized in that, in the fifth aspect, the sealing member is fixed to the second rotating shaft.

[0025] In the endoscope according to a ninth aspect, in the fifth aspect, the sealing member and the second rotating shaft are formed integrally.

[0026] The endoscope according to a tenth aspect is characterized in that, in any one of the fifth to seventh aspects, the sealing member has a cylindrical shape through which the first rotating shaft and the second rotating shaft are inserted,

[0027] The sealing member includes a first flange portion provided on the first rotation axis side in the axial direction of the sealing member and protruding in a radial direction orthogonal to the axial direction, and a second flange portion provided on the second rotation axis side in the axial direction and protruding in the radial direction.

[0028] The endoscope according to the eleventh aspect is characterized in that, in the tenth aspect, a knob portion is protrudingly provided at an end portion of the second flange portion on the rod accommodation portion side.

[0029] In the endoscope according to the twelfth aspect, in the tenth aspect or the eleventh aspect, the first flange portion is arranged in the first through hole, and the second flange portion is arranged in the rod accommodating portion.

[0030] The endoscope according to the 13th aspect is any one of the 1st aspect to the 12th aspect, wherein the rising base includes a third through hole for inserting the rotating shaft.

[0031] The rotating shaft has a planar side portion and a curved arc portion which are parallel to the axial direction of the rotating shaft.

[0032] The third through hole has a hole-side side portion that faces and contacts the side portion and a hole-side arc portion that faces the arc portion with a gap therebetween formed in the inner circumference.

[0033] Effects of the Invention

[0034] According to the present invention, the cleanability of the distal end portion of the endoscope insertion portion can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1It is an assembly perspective view showing the structure of the distal end portion of the endoscope insertion portion.

[0036] Figure 2 It is a perspective view showing the structure of the front end portion main body.

[0037] Figure 3 This is a schematic front view of the front end body.

[0038] Figure 4 This is an assembly diagram of the front end body.

[0039] Figure 5 This is a diagram for explaining the operation of the rising platform which is moved by operating the lever.

[0040] Figure 6 This is a three-dimensional view of the appearance of the stand.

[0041] Figure 7 It is an assembly perspective view showing the connection structure between the erection platform and the rod.

[0042] Figure 8 yes Figure 7 A cross-sectional view of the connection structure shown.

[0043] Fig. 9 It is a cross-sectional view of the rotation shaft and the through hole on the adjacent wall.

[0044] Fig.10 This is an explanatory diagram of a space defined by a through hole and a rotation axis.

[0045] Fig.11 This is a perspective view of a sealing component mounted on a rotating shaft.

[0046] Fig.12 It is the front view of the sealing component.

[0047] Fig.13 This is a cross-sectional view showing three protrusions respectively embedded in three gaps.

[0048] Fig.14 This is a cross-sectional view of the rotation shaft and the through hole on the side of the rising table.

[0049] Fig.15 It is a cross-sectional view showing a first modified example of the connection structure between the rising platform and the rod.

[0050] Fig.16 yes Fig.15 A three-dimensional view of the sealing component used in the connection structure.

[0051] Fig.17 yes Fig.16 A front view of the base of the sealing component is shown.

[0052] Fig.18 yes Fig.15 Side view of the rod shown.

[0053] Fig.19 It is a cross-sectional view showing a second modified example of the connection structure between the rising platform and the rod.

[0054] Fig. 20 yes Fig.19 A three-dimensional view of the sealing component used in the connection structure.

[0055] Fig.21 It is a cross-sectional view showing the main structure of the front end portion according to the second embodiment.

[0056] Fig. 22 yes Fig.21 An assembled perspective view of the connecting structure shown.

[0057] Fig.23 This is a cross-sectional view of a seal member fixed to the rod-side rotating shaft by adhesive.

[0058] Fig.24 This is a cross-sectional view showing that the seal member and the rod-side rotating shaft are formed as an integral body.

[0059] Explanation of symbols

[0060] 10-front end portion, 12-insertion portion, 14-bend portion, 16-cylindrical member, 20-front end portion body, 22-first partition wall, 24-second partition wall, 24A-front end surface, 26-upright platform, 28-upright platform storage chamber, 30-opening, 32-treatment instrument insertion passage, 32A-treatment instrument outlet, 50-rotation axis, 50A-axis, 50B-edge portion, 50C-arc portion, 52-through hole, 52A-inner surface surface, 53-gap portion, 53A-gap side portion, 53B-gap side arc portion, 54-rod, 56-rod storage chamber, 58-storage chamber, 60-irradiation window, 62-observation window, 64-air and water supply nozzle, 66-operation cable, 68-connection portion, 70-exit, 71-cable insertion passage, 72-through hole, 72B-hole side portion, 72C-hole side arc portion, 74-through hole, 74A-inner surface, 75-gap portion , 77-gap portion, 80-sealing component, 80A-shaft, 82-base, 84-protrusion, 84A-protruding side portion, 84B-protruding side arc portion, 86-slit, 88-shaft accommodating space, 100-front end cover, 102-opening portion, 180-sealing component, 182-base, 184-fitting hole, 186-fitting hole, 200-cover, 202-opening window, 280-sealing component, 282-base, 2 84-fitting hole, 300-front end portion, 302-standing table side rotation axis, 302A-outer surface, 304-rod side rotation axis, 306-prismatic portion, 308-angular hole portion, 310-rotation axis, 320-sealing component, 320A-axis, 322-cylindrical portion, 322A-inner surface, 324-flange portion, 326-flange portion, 330-adhesive, 332-integrally formed object, Ax-major axis, G-guide surface. DETAILED DESCRIPTION

[0061] Hereinafter, an endoscope according to an embodiment of the present invention will be described.

[0062] In the embodiment, a side-viewing endoscope used as a duodenoscope is exemplified. The endoscope includes an operation unit operated by a surgeon and an endoscope insertion unit (hereinafter referred to as "insertion unit") connected to the operation unit and inserted into a subject.

[0063] The insertion section is inserted into the subject through the oral cavity, and then inserted from the esophagus through the stomach to the duodenum. Thus, a treatment instrument inserted into the insertion section is used to perform a predetermined examination or treatment of the duodenum.

[0064] Examples of the treatment instrument include a biopsy forceps having a cup at the tip portion thereof for collecting living tissue, an EST (Endoscopic Sphincterotomy) knife, and an angiography tube.

[0065] [First embodiment]

[0066] Figure 1 1 is an assembly perspective view showing the structure of the distal end portion 10 according to the first embodiment. The distal end portion 10 is provided on the distal end side of the insertion portion 12. The distal end portion 10 is an example of the distal end portion of the present invention.

[0067] The insertion portion 12 has a long axis Ax extending from the proximal end side connected to the operation portion toward the distal end side, and includes a soft portion, a bending portion 14 , and a distal end portion 10 in this order from the proximal end side toward the distal end side.

[0068] The bending portion 14 is configured to have a cylindrical member 16 that is configured to be bendable by providing a notch in the circumferential direction, and the outer circumference of the cylindrical member 16 is covered with a mesh body woven with metal wires, and further covered with a rubber outer skin. In addition, a plurality of cables extend from the angle knob of the operating portion to the bending portion 14, and the front ends of these cables are fixed to the cylindrical member 16 constituting the bending portion 14. Thus, the bending portion 14 is bent up, down, left, and right by operating the angle knob.

[0069] The distal end portion 10 includes a distal end portion body 20 , a distal end cover 100 detachably attached to the distal end portion body 20 , and a cap 200 attached to the outer side of the distal end cover 100 .

[0070] The front end cover 100 has a stand-up housing chamber 28 (see FIG. 2 ) which is opened and described later when the front end cover 100 is attached to the front end body 20. Figure 3 ) has an opening portion 102 on the upper side of the opening 30. The front end cover 100 is made of a metal material having corrosion resistance.

[0071] Furthermore, the cover 200 has an opening window 202 that opens the opening 30 when it is mounted on the front end body 20. The cover 200 has an engaging portion that engages with a groove formed in the front end body 20 on its base end side, and is detachably mounted on the front end body 20. The cover 200 is made of a material having elasticity or a soft material such as silicone rubber or polyethylene.

[0072] Figure 2 It is a perspective view of the front end portion body 20 . Figure 3 It is a schematic front view of the distal end portion body 20 .

[0073] like Figure 2 and Figure 3 As shown, the front end body 20 has a pair of first partition walls 22 and second partition walls 24 that are opposed to each other as a part of the front end body 20. A stand accommodating chamber 28 is formed between the first partition wall 22 and the second partition wall 24. The stand accommodating chamber 28 is used to accommodate the stand 26 (in Figure 3 The slit-shaped space (not shown) of the rising stage storage chamber 28 Figure 2The opening on the middle upper side is formed as the above-mentioned opening 30. The front end body 20 is made of a metal material having corrosion resistance. In addition, the erection stand 26 and the erection stand storage chamber 28 are examples of the erection stand and the erection stand storage portion of the present invention.

[0074] In addition, a treatment instrument insertion passage 32 is connected to the erection platform storage chamber 28 of the front end body 20. The treatment instrument insertion passage 32 is inserted into the insertion portion 12 and connected to the treatment instrument introduction port of the operation portion. Thus, the treatment instrument introduced from the treatment instrument introduction port is led out to the erection platform storage chamber 28 through the treatment instrument insertion passage 32.

[0075] The stand 26 is provided in the front end body 20 and is accommodated in the stand accommodation chamber 28. The stand 26 changes the direction of the treatment tool introduced from the treatment tool outlet 32A, which is the front end opening of the treatment tool insertion passage 32, to the stand accommodation chamber 28 and protrudes from the opening 30. The stand 26 is rotated via a rotation shaft 50 (see FIG. 5 ) described later. Figure 4 ) is swingably provided in the through hole 52 of the first partition wall 22, and can control the direction in which the treatment tool is led out from the treatment tool lead-out port 32A.

[0076] A concave rod accommodation chamber 56 for accommodating the rod 54 is formed on the opposite surface of the first partition wall 22 on the opposite side of the surface facing the erection table accommodation chamber 28. That is, the front end portion 10 has the erection table accommodation chamber 28 and the rod accommodation chamber 56. In addition, the first partition wall 22 is provided at the front end portion 10 to partition the erection table accommodation chamber 28 and the rod accommodation chamber 56. In addition, the rod 54, the rod accommodation chamber 56, and the first partition wall 22 are examples of the rod, the rod accommodation portion, and the partition wall of the present invention.

[0077] A storage chamber 58 for storing an optical system and the like is provided in the second partition wall 24. An irradiation window 60, an observation window 62, and an air and water supply nozzle 64 facing the observation window 62 are provided in the upper portion of the storage chamber 58. The air and water supply nozzle 64 is connected to the air and water supply device via an air and water supply hose inserted into the insertion portion 12. By operating the air and water supply button of the operation portion, air or water is sprayed from the air and water supply nozzle 64 toward the observation window 62, thereby cleaning the observation window 62.

[0078] Furthermore, an illumination unit and a photographing unit are accommodated in the second partition wall 24. The illumination unit includes an illumination lens disposed inside the illumination window 60 and a light guide member disposed so that the front end faces the illumination lens. The light guide member is inserted into the insertion portion 12, and the base end thereof is connected to the light source device. Thus, the illumination light from the light source device is transmitted through the light guide member and irradiated from the illumination window 60.

[0079] The photographing unit includes a photographing optical system and a CMOS (complementary metal oxide semiconductor) type or CCD (charge coupled device) type imaging element disposed inside the observation window 62. The imaging element is connected to the image processing device via a signal cable inserted into the insertion portion 12. The imaging signal of the subject image obtained by photographing the photographing unit is input to the image processing device via the signal cable, and the subject image is displayed on a monitor connected to the image processing device.

[0080] Figure 4 2 is an assembled stereogram of the front end body 20. Figure 4 In FIG. 5 , the rod 54 is omitted from illustration, and the rotating shaft 50 connected to the rod 54 is shown.

[0081] like Figure 4 As shown, a through hole 52 is provided on the bottom surface of the concave rod accommodation chamber 56, which penetrates the first partition wall 22 and communicates with the stand accommodation chamber 28. The rotation shaft 50 connecting the stand 26 and the rod 54 is inserted through the through hole 52. That is, the through hole 52 through which the rotation shaft 50 is inserted is provided on the first partition wall 22. The rod 54 in the rod accommodation chamber 56 swings around the rotation shaft 50, so the rod accommodation chamber 56 is formed into a roughly fan shape around the rotation shaft 50. In addition, the rotation shaft 50 and the through hole 52 are examples of the rotation shaft and the first through hole of the present invention.

[0082] One end of the rod 54 is connected to the erecting platform 26 via the rotating shaft 50, and the other end is connected to the operation cable 66, the detailed structure of which will be described later. By operating the operation cable 66, the rod 54 and the erecting platform 26 swing together around the rotating shaft 50.

[0083] like Figure 2 As shown, the operation cable 66 has a connection portion 68 connected to the rod 54 in the rod storage chamber 56 at its front end side. In addition, the base end side of the operation cable 66 passes through the cable insertion path 71 from the outlet 70 opened to the wall surface of the rod storage chamber 56, and is connected to the erection table operation mechanism in the operation portion. In addition, the operation cable 66 is an example of the cable of the present invention.

[0084] Figure 5 VA and VB are explanatory diagrams for explaining the operation of the erecting table 26 which is operated by the operation of the lever 54.

[0085] like Figure 5 As shown in VA, if the operating cable 66 is pushed by operating the operating lever, the rod 54 swings in the direction A around the rotating shaft 50, and the erecting platform 26 moves from the erecting position to the lying position. Figure 5 As shown in VB, if the operating cable 66 is pulled by operating the operating lever, the rod 54 swings in the B direction (the direction opposite to the A direction) with the rotating shaft 50 as the center, and the erecting platform 26 moves from the lying position to the standing position. In this way, the operating cable 66 can rotate the rotating shaft 50 via the rod 54 by operating the operating lever. As a result, the position of the erecting platform 26 changes between the standing position and the lying position.

[0086] Figure 6 It is an external perspective view of the standing table 26 accommodated in the standing table accommodation chamber 28 .

[0087] like Figure 6 As shown, the stand 26 has an arc-shaped guide surface G. The guide surface G faces the treatment tool outlet 32A of the treatment tool insertion passage 32 in the stand storage chamber 28 and guides the treatment tool introduced from the treatment tool outlet 32A into the stand storage chamber 28 toward the opening 30 .

[0088] The base end of the erecting stand 26 is provided with a through hole 72 for inserting the rotating shaft 50. The erecting stand 26 is connected to the rod 54 via the rotating shaft 50 by inserting the rotating shaft 50 into the through hole 72. The rotating shaft 50 and the through hole 72 will be described later.

[0089] Here, the front end portion 10 of the insertion portion 12 is a component that is exposed to liquid such as body fluid when the endoscope is used. Therefore, sometimes the liquid flows from the stand storage chamber 28 into the through hole 52 of the first partition 22 and penetrates into the rod storage chamber 56. In this way, the rotating shaft 50, the through hole 52, the rod 54, etc. are contaminated by the liquid, so these components must be cleaned, but since these components are small and have a complex shape, it is difficult to completely clean them.

[0090] Therefore, the front end portion 10 of the first embodiment has the following structure (connection structure) to improve the cleanability of the front end portion 10 by solving the above-mentioned problem of cleanability.

[0091] <Connection structure of the stand and the pole>

[0092] Figure 7 It is an assembly perspective view showing the connection structure between the erection stand 26 and the rod 54 . Figure 8 yes Figure 7 A cross-sectional view of the connection structure shown.

[0093] <Rotation axis>

[0094] First, the rotating shaft 50 is described. The rotating shaft 50 is formed with a flat side portion 50B and a curved arc portion 50C in a circumferential surface parallel to the axis 50A of the rotating shaft 50. Specifically, the rotating shaft 50 has a substantially triangular prism shape as follows: the side portions 50B and the arc portions 50C are alternately formed at three locations in the circumferential direction of the rotating shaft 50, and these side portions 50B and the arc portions 50C are extended along the axis 50A direction. In addition, the rotating shaft 50, the side portions 50B and the arc portions 50C are examples of the rotating shaft, the side portions and the arc portions of the present invention.

[0095] When the rotating shaft 50 is inserted into the through hole 52 to connect the upright stand 26 and the rod 54, Fig. 9 As shown in the cross-sectional view of the rotating shaft 50 and the through hole 52, the arc portion 50C of the rotating shaft 50 is in sliding contact with the inner surface 52A of the through hole 52 as a circular hole, but the side portion 50B of the rotating shaft 50 is not in contact with the inner surface 52A. Therefore, a gap portion 53 is formed between the side portion 50B and the inner surface 52A. In this example, the gap portion 53 is formed at three locations in the circumferential direction of the rotating shaft 50. In addition, the gap portion 53 is an example of the gap portion of the present invention.

[0096] Fig.10 It is an explanatory diagram of the gap portion 53 provided between the side portion 50B of the rotating shaft 50 and the inner surface 52A of the through hole 52 .

[0097] like Fig.10 As shown, the gap portion 53 is a space portion defined by the side portion 50B and the inner surface 52A, and is formed in a substantially half-moon shape having a gap side edge portion 53A along the side portion 50B and a gap side arc portion 53B along the inner surface 52A.

[0098] The gap 53 thus formed becomes a flow path for the fluid from the erection platform accommodating chamber 28 toward the rod accommodating chamber 56. Therefore, in order to improve the cleanability of the front end portion 10, it is necessary to close the gap 53 and seal the through hole 52. Therefore, in the front end portion 10 of the first embodiment, a sealing member 80 for sealing the through hole 52 is provided in the connection structure between the erection platform 26 and the rod 54 (see Fig.11 ). Next, the sealing member 80 will be described.

[0099] <Sealing Parts>

[0100] Fig.11 Is installed on Figure 7 and Figure 8 An enlarged perspective view of the sealing member 80 on the rotating shaft 50 is shown.

[0101] like Fig.11As shown in FIG. 1 , the sealing member 80 is configured to be substantially cylindrical with a shaft 80A. The sealing member 80 includes a base 82 and three protrusions 84 protruding from the base 82. As will be described later, the three protrusions 84 are configured to be able to fit into the Fig.10 The sealing member 80 is made of PTFE (PTFE) O The sealing member 80 is made of plastic such as polytetrafluoroethylene (PTFE) or rubber such as fluororubber and silicone rubber. The sealing member 80 is an example of the sealing member of the present invention.

[0102] Specifically, the base 82 of the sealing member 80 is configured in a disk shape. Three protrusions 84 protrude from the base 82 in parallel with each other along the axis 80A direction. The outer peripheral surfaces of the base 82 and the three protrusions 84 are flush with each other and have no height difference, and the three protrusions 84 are configured in a plate shape extending from the outer peripheral surface of the base 82 in the axis 80A direction. In addition, the three protrusions 84 protrude at equal intervals in the circumferential direction around the axis 80A through three slits 86 along the axis 80A.

[0103] Fig.12 This is a front view of the sealing member 80 as seen from the axis 80A direction.

[0104] like Fig.12 As shown, the sealing member 80 has a shaft accommodation space 88 surrounded by three protrusions 84. The rotating shaft 50 is accommodated in the shaft accommodation space 88. In this case, the rotating shaft 50 is accommodated in a state where the shaft 50A of the rotating shaft 50 is aligned with the shaft 80A of the sealing member 80. Thus, the sealing member 80 is mounted on the rotating shaft 50.

[0105] The protrusion 84 includes a protrusion side edge portion 84A that is opposed to and in contact with the edge portion 50B of the rotation shaft 50 at the inner periphery and a protrusion side arc portion 84B that is opposed to and in sliding contact with the inner surface 52A of the through hole 52 at the outer periphery. Fig.10 The protruding side edge portion 84A of the gap side edge portion 53A and the protruding side arc portion 84B along the gap side arc portion 53B are shown in a generally half-moon shape.

[0106] The shape of the protrusion 84 allows the protrusion 84 to be inserted into the gap 53. Therefore, when the rotating shaft 50 is inserted into the through hole 52, the three protrusions 84 of the sealing member 80 mounted on the rotating shaft 50 are respectively inserted into the three gaps 53. Fig.13 2 is a cross-sectional view showing three protrusions 84 respectively fitted into three gaps 53 .

[0107] Thus, the three gaps 53 are respectively closed by the three protrusions 84 , so that the through-hole 52 can be sealed. Therefore, the flow of the fluid from the rising stage storage chamber 28 to the rod storage chamber 56 can be blocked by the sealing member 80 .

[0108] On the other hand, Figure 8 As shown in FIG. 1 , the rod 54 also has a through hole 74. A sealing member 80 mounted on the rotating shaft 50 is also inserted into the through hole 74. The through hole 74 has an inner diameter slightly smaller than that of the through hole 52. The arrangement relationship between the rotating shaft 50 and the through hole 74 is as described above, although the inner diameters are different, Fig. 9 The illustrated arrangement relationship between the rotation shaft 50 and the through hole 52 is approximate.

[0109] Therefore, regarding the arrangement relationship between the rotating shaft 50 and the through hole 74, Fig. 9 For explanation. Fig. 9 As shown, the arc portion 50C of the rotating shaft 50 is in sliding contact with the inner surfaces 52A and 74A of the through hole 52 and the through hole 74, respectively. In addition, there are gaps 53 and 75 between the side portion 50B of the rotating shaft 50 and the inner surfaces 52A and 74A of the through hole 52 and the through hole 74, respectively. Then, the three protrusions 84 of the sealing member 80 are embedded in the gaps 53 and 75. In addition, the through hole 74 is an example of the second through hole of the present invention.

[0110] The connection structure of this example, in the relationship with the sealing component 80, becomes a structure that temporarily transmits the rotational (swinging) force of the rod 54 to the sealing component 80, and then transmits it from the sealing component 80 to the rotating shaft 50. Therefore, in the connection structure of this example, in order to transmit the rotational force of the rod 54 to the rotating shaft 50, for example, the rod 54 (through hole 74) and the sealing component 80 (protrusion 84) are fitted in a dimensional relationship (interference) that cannot rotate relative to each other. As a result, since the relative idling of the rod 54 and the sealing component 80 can be prevented, the rotational force of the rod 54 can be transmitted to the rotating shaft 50 via the sealing component 80. In addition, on the through hole 52 side, in order to make the rotating shaft 50 (including the sealing component 80) rotate smoothly relative to the through hole 52, the inner surface 52A of the through hole 52 can also be coated with a lubricating material, or a lubricant can be filled between the inner surface 52A and the sealing component 80.

[0111] Next, the connection procedure of the erecting stand 26 and the rod 54 based on the connection structure of this example is described. First, the sealing member 80 is mounted on the rotating shaft 50. Next, the sealing member 80 is mounted on the through hole 74 of the rod 54. Then, the rotating shaft 50 is inserted into the through hole 52 while the sealing member 80 is mounted in the through hole 52 from the rod accommodation chamber 56 side, and the rotating shaft 50 inserted through the through hole 52 is inserted into the through hole 72 of the erecting stand 26. Through this procedure, the erecting stand 26 and the rod 54 can be connected.

[0112] In addition, as other connection sequences, the following two connection sequences are exemplified. In the first other connection sequence, first, the rotating shaft 50 is inserted into the through hole 52 and inserted into the through hole 72. Next, the rotating shaft 50 is inserted into the through hole 74. In this state, the sealing component 80 is installed in the through hole 74 and the through hole 52 from the rod 54 side. The upright platform 26 and the rod 54 can also be connected by this sequence. In the second other connection sequence, first, the upright platform 26 is accommodated in the upright platform accommodating chamber 28, and the rotating shaft 50 is inserted into the through hole 52 and inserted into the through hole 72 from the rod accommodating chamber 56 side, thereby setting and fixing the rotating shaft 50 to the upright platform 26. Then, the rotating shaft 50 is inserted into the through hole 74 and the rod 54 is set on the rotating shaft 50, and the rod 54 is accommodated in the rod accommodating chamber 56. Finally, in a state where the rod 54, the rotating shaft 50, and the erecting stand 26 are assembled, the sealing member 80 is attached to the through hole 74 and the through hole 52 from the rod 54 side. The erecting stand 26 and the rod 54 can also be connected by this sequence.

[0113] Next, the separation procedure of the erection stand 26 and the rod 54 based on the connection structure of this example is described. First, the rod 54 is removed from the rod accommodation chamber 56 side. Thus, the sealing member 80 is removed together with the rod 54 from the rod accommodation chamber 56 side. Then, the rotating shaft 50 is removed from the rod accommodation chamber 56 side. Through this sequence, the erection stand 26 and the rod 54 can be separated. That is, the sealing member 80 of this example can be freely loaded and unloaded from the rod accommodation chamber 56 side. Then, when the separation operation is completed, the inner surface 52A of the through hole 52 is exposed, so that the inner surface 52A can be cleaned by the cleaning liquid.

[0114] Next, the connection structure between the rotating shaft 50 and the rising stand 26 will be described. Figure 7 As shown in FIG. 1 , the erecting stand 26 includes a through hole 72 into which the rotating shaft 50 is inserted. As described above, the rotating shaft 50 is formed with the side portion 50B and the arc portion 50C.

[0115] Fig.14 It is a cross-sectional view of the rotating shaft 50 and the through hole 72 .

[0116] like Fig.14 As shown, the through hole 72 is formed with a hole side edge portion 72B that is opposite to and in contact with the edge portion 50B and a hole side arc portion 72C that is opposite to the arc portion 50C via a gap portion 77 at the inner circumference. In addition, the through hole 72, the hole side edge portion 72B, and the hole side arc portion 72C are an example of the third through hole, hole side edge portion, and hole side arc portion of the present invention.

[0117] According to the above-mentioned connection structure, since the side portion 50B of the rotating shaft 50 and the hole side side portion 72B of the through hole 72 are in contact with each other, the rotational force transmitted from the rod 54 to the rotating shaft 50 can be transmitted to the upright stand 26. In addition, since the gap portion 77 formed between the arc portion 50C and the hole side arc portion 72C can be used as a cleaning channel for passing the cleaning liquid, the cleaning performance of the arc portion 50C and the hole side arc portion 72C exposed to the gap portion 77 can be improved.

[0118] As described above, according to the distal end portion 10 of the first embodiment, the sealing member 80 is attached to the rotating shaft 50 connecting the erecting base 26 and the rod 54. When the rotating shaft 50 is inserted into the through hole 52, the through hole 52 is sealed by the sealing member 80, so that liquid such as body fluid can be prevented from entering the rod accommodation chamber 56 from the through hole 52. In addition, since the sealing member 80 is provided to be detachable from the rod accommodation chamber 56 side, the inner surface 52A of the through hole 52 can be cleaned with a cleaning liquid. Thus, the cleanability of the distal end portion 10 can be improved.

[0119] <Modification>

[0120] Next, several modifications (first modification and second modification) of the distal end portion 10 of the first embodiment will be described. When describing the modifications, the same or similar components as those of the first embodiment are denoted by the same reference numerals.

[0121] <First Modification>

[0122] Fig.15 It is a cross-sectional view showing a first modified example of the connection structure between the rising platform 26 and the rod 54 . Fig.16 Is applied to Fig.15 A three-dimensional view of a sealing component 180 having a connection structure.

[0123] like Fig.15 and Fig.16 As shown in FIG. 1 , the sealing member 180 includes a base 182 and three protrusions 84 protruding from the base 182. These three protrusions 84 are respectively embedded in Fig.10 The three gaps 53 shown are formed to seal the through-holes 52. This point is the same as the sealing member 80 of the first embodiment.

[0124] The difference between the structure of the sealing member 180 and the sealing member 80 is that the base 82 of the sealing member 80 is in the shape of a disk, whereas the base 182 of the sealing member 180 is in the shape of a disk. Fig.17 The sealing member 180 is formed into a polygon (an octagon in this example) in the front view viewed from the axis 180A direction, and the base 182 of the sealing member 180 has a substantially triangular fitting hole 184 that can fit the rotating shaft 50. Fig.17In order to distinguish the base 182 from the protrusion 84, the protrusion 84 is shown in cross section.

[0125] like Fig.18 As shown in the side view of the rod 54, the base 182 is fitted into a fitting hole 186 formed in the rod 54. The fitting hole 186 is formed on the opposite surface of the rod 54 opposite to the surface facing the first partition wall 22 and communicates with the through hole 74.

[0126] The fitting hole 186 is formed in a polygonal (octagonal) shape similar to the base 182. The sealing member 180 is connected to the rod 54 so as not to rotate relative to each other by fitting the base 182 in the fitting hole 186. That is, the sealing member 180 includes the base 182 that is fitted so as not to rotate relative to the rod 54. The base 182 is an example of the base of the present invention.

[0127] The end of the rotating shaft 50 on the rod 54 side is fitted into the fitting hole 184 of the base 182. That is, the base 182 includes the fitting hole 184 that is fitted to the rotating shaft 50 so as not to rotate relative to it. The fitting hole 184 is an example of the fitting hole of the present invention.

[0128] According to the first modified example including the sealing member 180, the base 182 of the sealing member 180 is fitted into the fitting hole 186 of the rod 54, and the rotating shaft 50 is fitted into the fitting hole 184 of the base 182, so that the rotational force of the rod 54 can be reliably transmitted to the sealing member 180 and the rotating shaft 50. Moreover, the sealing member 180 can be attached and detached from the rod accommodation chamber 56 side similarly to the sealing member 80.

[0129] When the base 182 is made of metal and the protrusion 84 is made of resin or rubber, the sealing member 180 can be manufactured by a known insert molding method. By making the base 182 of metal, the strength of the base 182 can be improved, and by making the protrusion 84 of resin or rubber, the adhesion between the protrusion 84 and the through-holes 52, 74 can be improved.

[0130] <Second Modification>

[0131] Fig.19 It is a cross-sectional view showing a second modified example of the connection structure between the rising platform 26 and the rod 54 . Fig. 20 Is applied to Fig.19 A three-dimensional view of a sealing component 280 having a connection structure.

[0132] like Fig.19 and Fig. 20 As shown in FIG. 2 , the sealing member 280 includes a base 282 and three protrusions 84 protruding from the base 282. The three protrusions 84 are respectively embedded in Fig.10The three gaps 53 shown are formed to seal the through-holes 52. This point is the same as the sealing member 80 of the first embodiment.

[0133] like Fig.19 As shown, the difference between the first embodiment and the second modification is that the rod 54 does not have a through hole 74 (see Figure 8 ), but has a fitting hole 284 in the rotating shaft 50 instead of the through hole 74, and the base 82 of the sealing component 80 is configured so that it passes through the through hole 74, and the base 282 of the sealing component 280 is configured in the gap between the first partition wall 22 and the rod 54.

[0134] The fitting hole 284 is formed in a substantially triangular shape corresponding to the cross-sectional shape of the rotating shaft 50. The end of the rotating shaft 50 on the rod 54 side is fitted into the fitting hole 284. That is, the rod 54 is provided with the fitting hole 284 fitted to the rotating shaft 50 so as to be non-rotatable relative to the rotating shaft 50.

[0135] According to the second modified example having such a rod 54, since the rotating shaft 50 is fitted into the fitting hole 284, the rotational force of the rod 54 can be reliably transmitted to the rotating shaft 50. In addition, the sealing member 280 can be mounted from the rod accommodation chamber 56 side together with the rod 54. In addition, by removing the rod 54 from the rod accommodation chamber 56 side, the sealing member 280 can be removed from the rod accommodation chamber 56 side. In this case, the base 282 exposed to the rod accommodation chamber 56 is removed, and the sealing member 280 is removed from the through hole 52. That is, the sealing member 280 can be attached and detached from the rod accommodation chamber 56 side.

[0136] Furthermore, in the first embodiment (including the first and second modifications), the seal members 80 , 180 , and 280 are described as having three protrusions 84 corresponding to the shape of the substantially triangular prism-shaped rotating shaft 50 , but the present invention is not limited thereto.

[0137] For example, when the rotating shaft 50 is in a semi-cylindrical shape, the protrusion 84 can be formed in a semi-cylindrical shape. The protrusion 84 is a protrusion formed with one edge and one arc portion, respectively. And, when the rotating shaft 50 is in a cylindrical shape, the protrusion 84 can be formed in a cylindrical shape. In any case, the protrusion 84 (semi-cylindrical and cylindrical) can be embedded in the gap formed between the outer peripheral surface of the rotating shaft 50 and the inner surface 52A of the through hole 52. Thereby, the through hole 52 can be sealed. In addition, in the through hole 72 on the side of the upright platform 26, it is sufficient to set it to a shape (semi-circle, round hole) and size that can be fitted with the dimensional relationship (interference) that cannot be relatively rotated with the above-mentioned (semi-cylindrical and cylindrical) rotating shaft 50.

[0138] [Second embodiment]

[0139] Next, a second embodiment will be described. When describing the second embodiment, the same or similar components as those of the first embodiment are denoted by the same reference numerals.

[0140] Fig.21 2 is a cross-sectional view showing the main structure of the front end portion 300 according to the second embodiment, and in particular, the connection structure between the rising platform 26 and the rod 54 is shown in cross-sectional view. Fig. 22 yes Fig.21 An assembled perspective view of the connecting structure shown.

[0141] The first embodiment and the second embodiment have in common that they have a rotating shaft connecting the stand 26 and the rod 54 and that the through hole 52 through which the rotating shaft is inserted is sealed by a sealing member, but the structures of the rotating shaft and the sealing member are different.

[0142] First, the rotating shaft will be described. The rotating shaft 50 of the first embodiment adopts a connection structure in which the erecting platform 26 and the rod 54 are connected by one rotating shaft 50. In contrast, in the second embodiment, a connection structure is adopted in which two rotating shafts are connected to each other to form one rotating shaft, and the erecting platform 26 and the rod 54 are connected by the one rotating shaft.

[0143] The following will be described in detail. Fig.21 and Fig. 22 As shown, in the second embodiment, a stand-side rotating shaft 302 is provided on the stand 26, and a rod-side rotating shaft 304 is provided on the rod 54. In this example, the stand 26 and the stand-side rotating shaft 302 are integrally formed, and the rod 54 and the rod-side rotating shaft 304 are also integrally formed. In addition, the stand-side rotating shaft 302 and the rod-side rotating shaft 304 are examples of the first rotating shaft and the second rotating shaft of the present invention.

[0144] A prism portion 306 having a smaller diameter than the rod-side rotation shaft 304 is protrudingly provided on the rod-side rotation shaft 304. The prism portion 306 is an octagonal column and is provided coaxially with the rod-side rotation shaft 304. That is, the rod-side rotation shaft 304 having the prism portion 306 is provided on the rod 54 in the second embodiment. In addition, the prism portion 306 is an example of a fitting portion of the present invention.

[0145] On the other hand, a corner hole portion 308 that fits with the prism portion 306 is provided on the erecting table side rotating shaft 302. The corner hole portion 308 is an octagonal bottomed hole, and is provided coaxially with the erecting table side rotating shaft 302. That is, the erecting table 26 in the second embodiment is provided with the erecting table side rotating shaft 302 having the corner hole portion 308. In addition, the corner hole portion 308 is an example of a portion to be fitted in the present invention.

[0146] According to the connection structure of the second embodiment thus constructed, when the erection table side rotation shaft 302 and the rod side rotation shaft 304 are inserted into the through hole 52 from both sides of the through hole 52 with the first partition wall 22 interposed therebetween, the prism portion 306 and the corner hole portion 308 are fitted into each other. Thus, the erection table 26 and the rod 54 are connected by a single rotation shaft 310 composed of the erection table side rotation shaft 302 and the rod side rotation shaft 304, and the rotational force of the rod 54 can be transmitted to the erection table 26 via the rotation shaft 310.

[0147] The sealing member 80 of the first embodiment adopts a sealing structure in which a protrusion 84 provided on a base 82 is fitted into a gap 53 formed in a through hole 52 , thereby sealing the through hole 52 .

[0148] In contrast, the sealing member 320 of the second embodiment includes a cylindrical portion 322 inserted into the through hole 52 and flange portions 324 and 326 provided on both sides of the cylindrical portion 322. The through hole 52 is sealed by positioning the flange portion 324 in the through hole 52 and positioning the flange portion 326 in the rod accommodation chamber 56.

[0149] The sealing member 320 includes a cylindrical portion 322 having a cylindrical shape through which the erecting table side rotating shaft 302 and the rod side rotating shaft 304 are inserted. An outer surface 302A of the erecting table side rotating shaft 302 and an inner surface 322A of the cylindrical portion 322 are in sliding contact.

[0150] Furthermore, the sealing member 320 has a flange portion 324. The flange portion 324 is provided on the side of the erecting table side rotating shaft 302 and protrudes in a radial direction orthogonal to the direction of the shaft 320A. Furthermore, the sealing member 320 has a flange portion 326. The flange portion 326 is provided on the side of the rod side rotating shaft 304 and protrudes in the above-mentioned radial direction. Furthermore, the flange portion 326 is formed to have a larger diameter than the flange portion 324.

[0151] Furthermore, the flange portion 324 is located in the through hole 52, and the outer peripheral surface 324A of the flange portion 324 contacts the inner surface 52A of the through hole 52. Furthermore, the flange portion 326 is located in the rod accommodation chamber 56 and contacts the bottom 56A of the rod accommodation chamber 56. Furthermore, a knob portion 328 is protrudingly provided at the end portion of the sealing member 320 on the rod accommodation chamber 56 side, specifically, at the end portion 326A of the flange portion 326 on the rod accommodation chamber 56 side. The knob portion 328 protrudes toward the rod accommodation chamber 56 side. In addition, the flange portion 324, the flange portion 326, and the knob portion 328 are examples of the first flange portion, the second flange portion, and the knob portion of the present invention.

[0152] <How to install the sealing component in the through hole>

[0153] The sealing member 320 is pushed into the through hole 52 from the rod accommodation chamber 56 side, starting with the flange portion 324. Thus, the sealing member 320 can be mounted on the through hole 52. At this time, the flange portion 324 is located in the through hole 52, and the flange portion 326 is located in the rod accommodation chamber 56. Then, as described above, when the erecting table 26 and the rod 54 are connected by the rotating shaft 310, the outer surface 302A of the erecting table side rotating shaft 302 and the inner surface 322A of the cylindrical portion 322 are in sliding contact. Thus, the through hole 52 can be sealed.

[0154] <Method for removing the sealing member from the through hole>

[0155] First, the rod 54 is removed from the rod accommodation chamber 56. Then, the knob portion 328 is removed, and the sealing member 320 is removed from the through hole 52. In this way, the inner surface 52A of the through hole 52 can be cleaned.

[0156] Therefore, in the distal end portion 300 of the second embodiment, the through hole 52 is sealed by the sealing member 320, similarly to the distal end portion 10 of the first embodiment, so that it is possible to prevent liquid such as body fluid from entering the rod accommodation chamber 56 from the through hole 52. In addition, since the sealing member 320 is detachably mounted on the rod accommodation chamber 56 side, the inner surface 52A of the through hole 52 can be cleaned with a cleaning liquid. Thus, the cleanability of the distal end portion 300 can be improved.

[0157] <How to install and remove the sealing parts>

[0158] The sealing member 320 of the second embodiment is preferably detachable from at least the rod-side rotating shaft 304. Thus, the rod-side rotating shaft 304 and the sealing member 320 can be simultaneously inserted into the through hole 52 in a state where the sealing member 320 is pre-installed on the rod-side rotating shaft 304. In addition, the sealing member 320 may be detachably provided on the erecting table-side rotating shaft 302.

[0159] <Securing method of sealing parts>

[0160] The sealing member 320 may be fixed to the rod-side rotating shaft 304 . Fig.23 3 is a cross-sectional view of the sealing member 320 fixed to the rod-side rotating shaft 304 by the adhesive 330. In this case, the rod-side rotating shaft 304 and the sealing member 320 can be simultaneously inserted into the through hole 52. Furthermore, the rod-side rotating shaft 304 and the sealing member 320 can be simultaneously removed from the through hole 52.

[0161] <Integrally formed seal member>

[0162] Furthermore, the seal member 320 and the rod-side rotating shaft 304 may be formed integrally. Fig.243 is a cross-sectional view showing that the seal member 320 and the rod-side rotating shaft 304 are formed as an integrally formed body 332. In this case as well, the same effects as those of the above-mentioned fixing method can be obtained.

[0163] In addition, in the second embodiment, a corner hole portion 308 as a fitted portion is provided on the standing table side rotating shaft 302, and a prism portion 306 as a fitting portion is provided on the rod side rotating shaft 304, but this is not limited to this, and the prism portion 306 may be provided on the standing table side rotating shaft 302, and the corner hole portion 308 may be provided on the rod side rotating shaft 304.

[0164] Furthermore, in the second embodiment, as a fitting method of the fitting portion and the fitted portion, a fitting method based on the prism portion 306 and the corner hole portion 308 is described, but it is not limited to this. As long as it is a fitting method that can reliably transmit the rotational force of the rod 54 to the rising platform 26, for example, it may also be a fitting method of a cylindrical portion and a circular hole portion.

[0165] In the second embodiment, the erection platform 26 and the erection platform side rotation shaft 302 are described as being integrally formed, but the present invention is not limited thereto. For example, the erection platform 26 and the erection platform side rotation shaft 302 may be formed separately and the erection platform 26 and the erection platform side rotation shaft 302 may be formed as separate bodies. Fig.14 The connection structure described above is used to connect these upright platform 26 and upright platform side rotation shaft 302. That is, the following connection structure can also be adopted: the upright platform 26 is provided with a through hole 72, and the upright platform side rotation shaft 302 is formed with a side portion 50B and an arc portion 50C.

[0166] In the above-mentioned embodiments, the side-view endoscope is described as an example, but the present invention can be applied to various endoscopes such as an ultrasonic endoscope and a direct-view endoscope that have a standing base for changing the direction in which a treatment instrument is led out at the distal end of the insertion portion.

[0167] As mentioned above, the endoscope according to the embodiment has been described, but the present invention can be modified or altered in various ways without departing from the spirit of the present invention.

Claims

1. An endoscope comprising: A front end portion having a stand receiving portion and a rod receiving portion; A standing platform, accommodated in the standing platform accommodation portion; a rod, received in the rod receiving portion; a cable connected to the rod; a partition wall provided at the front end portion and separating the erection platform accommodation portion and the rod accommodation portion; A rotating shaft connecting the erection platform and the rod; a first through hole provided in the partition wall and through which the rotating shaft is inserted; and A sealing member is mounted on the rotating shaft and seals the first through hole when the rotating shaft is inserted into the first through hole, and is detachable from the rod accommodation portion.

2. The endoscope according to claim 1, wherein: The rod includes a second through hole through which the rotating shaft is inserted. The rotating shaft is provided with a planar side portion and a curved arc portion which are parallel to the axial direction of the rotating shaft. The arc portion is in sliding contact with the inner surface of each of the first through hole and the second through hole. A gap is provided between the side portion and the inner surface of each of the first through hole and the second through hole, The sealing member is embedded in the gap.

3. The endoscope according to claim 2, wherein: The sealing component comprises: A base portion, which is fitted so as to be unable to rotate relative to the rod; and a protrusion protruding from the base, The protrusion is embedded in the gap.

4. The endoscope according to claim 3, wherein: The base portion includes a fitting hole that is fitted to the rotating shaft so as to be non-rotatable relative to the rotating shaft.

5. The endoscope according to claim 1, wherein: The endoscope comprises: a first rotating shaft, which is disposed on the standing platform and constitutes the rotating shaft; and a second rotation axis, which is disposed on the rod and constitutes the rotation axis, A fitting portion is provided on one of the first rotating shaft and the second rotating shaft, and a fitted portion that fits with the fitting portion is provided on the other rotating shaft different from the one rotating shaft.

6. The endoscope according to claim 5, wherein: The sealing member is attachable to and detachable from at least the second rotating shaft.

7. The endoscope according to claim 5, wherein: A knob portion is protrudingly provided at an end portion of the sealing member on the rod accommodating portion side.

8. The endoscope according to claim 5, wherein: The sealing member is fixed to the second rotating shaft.

9. The endoscope according to claim 5, wherein: The sealing member and the second rotating shaft are formed integrally.

10. The endoscope according to claim 5, wherein: The sealing member has a cylindrical shape through which the first rotating shaft and the second rotating shaft are inserted. The sealing component has: a first flange portion provided on the first rotating shaft side in the axial direction of the sealing member and protruding in a radial direction orthogonal to the axial direction; and The second flange portion is provided on the second rotation axis side in the axial direction and protrudes in the radial direction.

11. The endoscope according to claim 10, wherein: A knob portion is protrudingly provided at an end portion of the second flange portion on the rod accommodating portion side.

12. The endoscope according to claim 10, wherein: The first flange portion is disposed in the first through hole, The second flange portion is disposed in the rod accommodating portion.

13. The endoscope according to any one of claims 1 to 12, wherein: The rising platform has a third through hole for inserting the rotating shaft. The rotating shaft is provided with a planar side portion and a curved arc portion which are parallel to the axial direction of the rotating shaft. The third through hole is formed with a hole-side side portion facing and contacting the side portion and a hole-side arc portion facing the arc portion with a gap therebetween on the inner circumference.

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