WO2019159591A1

WO2019159591A1 - Endoscope

Info

Publication number: WO2019159591A1
Application number: PCT/JP2019/001275
Authority: WO
Inventors: 森本　康彦; 常夫福澤
Original assignee: 富士フイルム株式会社
Priority date: 2018-02-16
Filing date: 2019-01-17
Publication date: 2019-08-22
Also published as: DE112019000825T5; JPWO2019159591A1; CN111629648B; CN111629648A; JP6859483B2

Abstract

The present invention provides an endoscope which can regulate the locations of an erecting stand erecting lever and a rotary shaft, enhance the erecting performance of the erecting stand erecting lever, and reduce the diameter of the distal end thereof. This endoscope is provided with: an insertion part; an operation part; an erecting stand assembly; a rotary shaft; an erecting stand which is connected to an end of the rotary shaft and guides a surgical tool; an erecting stand erecting lever having a lever body portion, a lever base end portion, and a lever distal end portion; a lever accommodation chamber provided in the erecting stand assembly, and having an exposing window which exposes a first lever side surface of the erecting stand erecting lever; a partition wall which is provided between the lever accommodation chamber and the erecting stand, and has a holding hole which supports the rotary shaft; an annular seal member through which the rotary shaft is inserted; a lid which detachably covers the exposing window; and a first regulating part that is provided in at least any one among a body portion side surface which is a lever body portion side surface of the first lever side surface, and a lid inner surface on the erecting stand erecting lever side of the lid, and that regulates the displacement of the erecting stand erecting lever in a first direction.

Description

Endoscope

The present invention relates to an endoscope including an upright that guides a treatment instrument derived from a distal end portion of an insertion portion.

As an ultrasonic endoscope, an electronic scanning ultrasonic transducer is provided at the distal end of the insertion portion of the endoscope, and a treatment instrument outlet is disposed at the proximal end of the ultrasonic transducer at the distal end. It has been. In endoscopy using this ultrasonic endoscope, for example, while acquiring an ultrasonic image of a lesioned part with an ultrasonic transducer, a puncture treatment tool led into the body through a treatment tool channel and a treatment tool outlet is used. The cells are collected by puncture. And such a treatment tool needs to change the derivation | leading-out direction derived | led-out from a front-end | tip part in order to treat the desired position in a body cavity, For this purpose, the treatment tool standing mechanism is provided in the front-end | tip part.

As such a treatment instrument erecting mechanism, a mechanism including an erecting stand disposed in the erecting stand accommodation chamber, a rotating shaft, and an erecting stand erecting lever is well known (see Patent Document 1 to Patent Document 6). ). The stand support chamber is formed on one side surface of the partition wall provided in the tip portion. The rotation shaft is rotatably supported by a holding hole (through hole) of the partition wall.

A stand is connected to one end of the rotating shaft, and a stand stand lever is connected to the other end. For this reason, a partition is arrange | positioned between a stand and a stand stand-up lever. A lever housing chamber is formed on the other side surface of the partition wall for housing the upright stand erecting lever. According to this treatment instrument erecting mechanism, the operation of the operation lever of the operation unit of the ultrasonic endoscope is transmitted to the erect stand elevating lever via the operation wire to rotate the elevating stand elevating lever, so that the rotation shaft is rotated. By rotating it, the upright can be displaced (rotated) around this rotation axis.

Further, in the treatment instrument erecting mechanism using the erecting stand elevating lever, for example, an O-ring (O-ring) or the like is disposed between the outer peripheral surface of the rotating shaft and the inner wall surface of the holding hole. Intrusion of blood, water, and the like from the stand storage chamber to the lever storage chamber is prevented.

By the way, in the ultrasonic endoscope, as described above, since the ultrasonic transducer is arranged on the distal end side of the distal end portion, the side endoscope (for example, the duodenum) disclosed in Patent Documents 3 to 6 described above. It is not possible to make the tip structure detachable like a mirror. For this reason, it was necessary to disassemble the tip when exchanging the upright stand elevating lever and the seal member.

Therefore, for example, in the ultrasonic endoscope described in Patent Document 1, an opening for replacement (removal) of an upright stand erecting lever and a seal member is provided in a part of the wall surface of the lever accommodating chamber, and this opening is made of metal. The metal lid is covered with a resin-made outer lid that forms a part of the outer peripheral surface of the tip. The metal lid is provided with a movement restricting surface that abuts on the rotation shaft and restricts the movement of the rotation shaft and the upright stand erecting lever toward the metal lid.

Also, in the ultrasonic endoscope described in Patent Document 2, similarly to Patent Document 1, an opening for replacement of a stand stand up lever and a seal member is provided in a part of the wall surface of the lever housing chamber. The opening is covered with a lid that forms part of the outer peripheral surface of the tip.

JP 2016-131578 A Japanese Patent No. 6138404 JP 2004-141315 A JP 2010-201020 A Japanese Unexamined Patent Publication No. 2016-174817 Japanese Unexamined Patent Publication No. 2016-174818

By the way, an ultrasonic endoscope needs to be cleaned using a cleaning solution and a disinfecting solution every time it is used for various examinations and treatments. At this time, the distal end portion provided with the treatment instrument stand-up mechanism is miniaturized and the shape thereof is complicated, so that the cleaning performance such as the wrapping of the cleaning liquid, the insertion property of the cleaning brush, and the draining performance can be improved and the cleaning operation can be performed. Ease is required. For example, if the side surface on the partition wall side of the stand is in close contact with the partition wall, there is a possibility that the cleaning liquid or the like may not enter the side surface or the cleaning brush may not be applied. Therefore, it is preferable that a gap be formed between the side wall of the upright stand on the partition side and the partition wall.

However, when a gap is formed between the side surface of the stand on the partition wall side and the partition wall, the rotation axis is displaced in the axial direction in accordance with the rotation operation of the stand. For this reason, as described in Patent Document 2, simply by covering the opening of the lever housing chamber with a lid, the position of the seal member (airtight surface) is displaced in the axial direction as described above, or the seal member is held. There is a risk of slidably contacting the inner wall surface of the hole.

FIG. 29 is an explanatory diagram for explaining the problem of the ultrasonic endoscope described in Patent Document 1. FIG. In the figure, reference numeral 502 denotes a distal end portion of the ultrasonic endoscope, reference numeral 504 denotes a partition wall, reference numeral 506 denotes a rotating shaft, reference numeral 508 denotes a stand, and reference numeral 510 denotes a stand stand up lever. Yes, reference numeral 514 is a lever accommodating chamber, reference numeral 516 is a metal lid, reference numeral 518 is a resin lid, and reference numeral 520 is a seal member.

29, in the ultrasonic endoscope described in Patent Document 1, the opening of the lever housing chamber 514 is covered with a metal lid 516 and a resin lid 518. Further, in this ultrasonic endoscope, the metal lid 516 is brought into contact with the connecting portion between the shaft center 506A of the rotating shaft 506 and the rotating shaft 506 of the upright stand raising lever 510. As a result, it is possible to improve the exchangeability of the stand upright lever 510 and the seal member 520 and to restrict the positions of the stand upright lever 510 and the rotating shaft 506.

However, as shown by reference numeral 500B in FIG. 29, in order to improve the stand-up performance of the stand-up stand up lever 510 in response to the stand-up operation of the control lever (not shown), the length of the stand up stand up lever 510 is based on the lever principle. It is necessary to lengthen LQ [length from a connection portion with an operation wire (not shown) to a connection portion with the rotation shaft 506 (shaft center 506A)]. In this case, when the increase in the length LQ of the upright stand raising lever 510 and the reduction in the diameter of the tip end portion 502 are both achieved, the position of the shaft center 506A of the rotating shaft 506 is the lower side in the cross section of the tip end portion 502 in the figure. Sneak away. For this reason, the metal lid 516 cannot be brought into contact with the rotating shaft 506 or the like.

The present invention has been made in view of such circumstances, and it is possible to realize the position regulation of the stand upright lever and the rotary shaft, the improvement in the standup stand standing lever performance, and the reduction in the diameter of the tip. It is an object to provide a flexible endoscope.

An endoscope for achieving the object of the present invention is provided on an insertion portion having a distal end and a proximal end, an operation portion having an operation member provided on a proximal end side of the insertion portion, and provided on a distal end side of the insertion portion. An upright stand assembly, a rotary shaft rotatably supported by the upright stand assembly, an upright stand connected to one end of the rotary shaft and guiding a treatment instrument derived from the upright stand assembly, and a lever main body portion An upright stand elevating lever having a lever base end portion provided on one end side of the lever main body portion and connected to the other end of the rotating shaft, and a lever tip end portion provided on the other end side of the lever main body portion; A lever housing chamber provided in the stand assembly and rotatably receiving the stand stand up lever about the rotation axis, exposing the first lever side surface opposite to the rotation shaft side of the stand stand up lever. Lever storage chamber with window and operation section And a distal end side coupling portion coupled to a lever distal end portion of the stand upright lever, and the rotating shaft is rotated via the stand upright lever by operation of the operation member. An operation wire for raising the stand, a partition that is a part of the stand assembly and is provided between the lever accommodating chamber and the stand, and has a holding hole that supports the rotary shaft, and the rotary shaft is inserted therethrough. And an annular seal member for maintaining airtightness between the outer peripheral surface of the rotating shaft and the inner wall surface of the holding hole, a lid for detachably covering the exposure window, and a side surface of the lever main body portion in the first lever side surface. A first restricting portion provided on at least one of the side surface of the main body and the inner surface of the lid on the upright stand raising lever side of the lid, and is interposed between the side surface of the main body and the inner surface of the lid to rotate. Standing stand upright in the first direction on the lid side in the direction parallel to the axis of the shaft Comprises a first regulating portion for regulating the bars of the displacement, the.

According to this endoscope, even when the length of the stand upright lever is increased, the displacement of the upright stand upright lever and the rotation shaft in the first direction without increasing the diameter of the distal end of the insertion portion. Can be regulated.

In the endoscope according to another aspect of the present invention, the partition wall includes a first storage chamber wall surface that constitutes a bottom surface of the lever storage chamber on the upright base side, and a holding hole is open. The second restricting portion is provided on at least one of the second lever side surface on the rotating shaft side and the first storage chamber wall surface, and is interposed between the second lever side surface and the first storage chamber wall surface. And the 2nd control part which controls the displacement of the stand stand raising lever to the 2nd direction on the opposite side to the 1st direction is provided. Thereby, it is possible to prevent the upright stand raising lever and the rotary shaft from being displaced in the axial direction of the rotary shaft.

In the endoscope according to another aspect of the present invention, the exposure window exposes the rotation range of the stand upright lever that rotates about the rotation axis in the lever housing chamber. Thereby, the restriction | limiting by a 1st control part can be performed in each rotation position of a stand stand raising lever.

In the endoscope according to another aspect of the present invention, when the first restricting portion is provided on the inner surface of the lid, the first restricting portion is at least on the side surface of the main body portion of the stand upright lever that rotates about the rotation axis. It has a shape along a part of the rotation trajectory, and is interposed between the main body side surface and the inner surface of the lid at each rotation position of the stand upright lever. Thereby, the restriction | limiting by a 1st control part can be performed in each rotation position of a stand stand raising lever.

In the endoscope according to another aspect of the present invention, the partition wall includes a second storage chamber wall surface that forms a side surface of the lever storage chamber and is formed with a wire insertion hole through which the operation wire is inserted. When the insertion hole is viewed from the tip end side of the stand assembly, the center position of the wire insertion hole is shifted to the stand base side from the lever tip portion. Thereby, the displacement in the 1st direction of a stand stand raising lever and a rotating shaft can be controlled more reliably.

In the endoscope according to another aspect of the present invention, the seal member is disposed between the inner wall surface of the holding hole and the outer peripheral surface of the rotating shaft, and a part of the sealing member is the holding hole on the upright base side of the holding hole. It is exposed from the opening. Thereby, the penetration | invasion of liquids, such as blood and water, between the outer peripheral surface of a rotating shaft and the inner wall face of a holding hole can be prevented.

In the endoscope according to another aspect of the present invention, a seal member is provided on the outer peripheral surface of the rotation shaft from the position on the stand upright lever side of the holding hole opening to the position on the stand base side of the holding hole opening. Is formed, and the seal member is in close contact with the first wall portion that is in close contact with the bottom surface of the seal member attachment groove, and the first groove wall surface on the upright side of the seal member attachment groove. A second wall portion, a third wall portion having an intimate region in close contact with the inner wall surface of the holding hole, and an exposed region located closer to the upright base than the opening of the holding hole. Thereby, the airtightness between the outer peripheral surface of the rotating shaft and the inner wall surface of the holding hole can be reliably held.

In the endoscope according to another aspect of the present invention, the seal member has elasticity, and the width of the first wall portion is formed to be longer than the width of the seal member mounting groove in the axial direction of the rotation shaft. The member is attached to the seal member attachment groove in a state where the first wall portion is compressed in the axial direction of the rotation shaft. Thereby, the sealing function of a sealing member can be improved.

In the endoscope according to another aspect of the present invention, between the first wall portion and the third wall portion of the seal member, in a direction in which the other is moved away from one of the first wall portion and the third wall portion. A biasing member or an elastic member for biasing is provided. Thereby, the sealing function of a sealing member can be improved.

In the endoscope according to another aspect of the present invention, the rotation shaft is configured to rotate between the first rotation shaft and the second rotation in the axial direction of the rotation shaft, with the second groove wall surface of the seal member mounting groove on the upright stand rising lever side as a boundary. The first rotating shaft is connected to the upright stand erecting lever at one end, has the first connecting portion and the second groove wall surface at the other end, and the second rotating shaft is the upright stand at one end. Are connected, and the other end has a second connecting portion connected to the first connecting portion, a groove bottom surface, and a first groove wall surface.

In the endoscope according to another aspect of the present invention, when the direction opposite to the first direction is the second direction, one end of the rotating shaft is second than the holding hole opening on the upright base side of the holding hole. The partition wall is provided with a holding hole opening and has an opposing wall surface facing the upright. The seal member is disposed between the opposing wall surface and the upright, and the rotating shaft is inserted therethrough. And a fourth wall portion that is in close contact with the opposing wall surface, and a fifth wall portion that is in close contact with the side surface of the upright on the rotating shaft side. Thereby, the airtightness between the outer peripheral surface of the rotating shaft and the inner wall surface of the holding hole can be reliably held.

In the endoscope according to another aspect of the present invention, an annular seal member mounting groove on which the seal member is fitted and a first groove wall surface on the upright side of the seal member mounting groove are configured on the outer peripheral surface of the rotating shaft. And the sealing member mounting groove is formed on the outer peripheral surface of the rotating shaft at a position closer to the upright stand rising lever side than the holding hole opening on the upright base side of the holding hole. The part covers a part of the seal side surface facing the first groove wall surface of the seal member with the first groove wall surface. Thereby, the washing | cleaning property of the sealing side surface of a sealing member improves, and the ease of the washing | cleaning operation | work can be aimed at.

In the endoscope according to another aspect of the present invention, a cut portion is provided on a part of the outer peripheral surface of the annular wall portion. Thereby, the washing | cleaning property of the sealing side surface of a sealing member improves, and the ease of the washing | cleaning operation | work can be aimed at.

In the endoscope according to another aspect of the present invention, the diameter of the outer peripheral surface of the annular wall portion is smaller than the diameter of the outer peripheral surface of the seal member. Thereby, the washing | cleaning property of the sealing side surface of a sealing member improves, and the ease of the washing | cleaning operation | work can be aimed at.

An endoscope according to another aspect of the present invention includes a lid airtight holding member that maintains airtightness between the exposure window and the lid.

The endoscope according to the present invention can realize the position regulation of the stand upright lever and the rotary shaft, the improvement in the standup performance of the stand upright stand lever, and the reduction in the diameter of the tip.

It is the schematic of the ultrasonic inspection system to which the endoscope of the present invention is applied. It is the schematic which showed the pipe line structure of the ultrasonic endoscope. It is an external appearance perspective view of the front-end | tip part of an insertion part. It is a left view when the front-end | tip part of an insertion part is seen from the front-end | tip side. It is a right view at the time of seeing the front-end | tip part of an insertion part from the front-end | tip side. It is a disassembled perspective view of the front-end | tip part of an insertion part. It is a disassembled perspective view of a stand assembly. It is a right view of the stand assembly when the distal end portion is viewed from the distal end side. It is a front view of the stand assembly when the distal end portion is viewed from the distal end side. It is the schematic which showed an example of the stand operating mechanism. It is explanatory drawing for demonstrating rotation of the stand depending on operation of an operation lever. It is an external appearance perspective view of a stand. It is the external appearance perspective view which looked at the stand stand up lever from the lever storage cover side. It is the external appearance perspective view which looked at the stand stand up lever from the stand stand side. It is explanatory drawing for demonstrating the connection state of an upright stand rotating shaft and an upright lever rotating shaft. It is explanatory drawing for demonstrating the exposure window and lever storage cover of a lever storage chamber. It is sectional drawing of the stand, the stand stand lever, and the rotating shaft which were penetrated by the holding hole. It is an enlarged view of the cover inner surface of a lever storage cover. It is an enlarged view of the lever front-end | tip part in FIG. 17, and a wire penetration hole. It is an enlarged view of the rotating shaft and seal member in FIG. It is an enlarged view of the 1st wall part of a sealing member. It is explanatory drawing for demonstrating the modification of a 1st control part and a 2nd control part. FIG. 6 is a cross-sectional view of a seal member according to Modification 1. 10 is a cross-sectional view of an O-ring according to Modification 2. FIG. It is an enlarged view of the O-ring in FIG. FIG. 26 is a cross-sectional view of the annular wall portion taken along line 26-26 in FIG. It is sectional drawing of the modification of an annular wall part. It is explanatory drawing of the 1st control part of another embodiment provided in the cover inner surface of the lever storage cover. 10 is an explanatory diagram for explaining a problem of an ultrasonic endoscope described in Patent Literature 1. FIG.

[Configuration of ultrasonic inspection system and ultrasonic endoscope]
FIG. 1 is a schematic view of an ultrasonic inspection system 2 to which the endoscope of the present invention is applied. As shown in FIG. 1, an ultrasonic inspection system 2 includes an ultrasonic endoscope 10 that images a body cavity (lumen) of a subject, an ultrasonic processor device 12 that generates an ultrasonic image, and an endoscope. An endoscopic processor device 14 that generates an image, a light source device 16 that supplies illumination light for illuminating the inside of the body cavity to the ultrasonic endoscope 10, and a monitor 18 that displays the ultrasonic image and the endoscopic image. And comprising.

The ultrasonic endoscope 10 corresponds to the endoscope of the present invention, and includes an insertion unit 20, an operation unit 22, and a universal cord 24.

The insertion unit 20 is inserted into various body cavities. The operation unit 22 is connected to the proximal end side of the insertion unit 20 and receives the operation of the operator.

The universal cord 24 has one end connected to the operation unit 22. Further, at the other end of the universal cord 24, an ultrasonic connector 27 connected to the ultrasonic processor device 12, an endoscope connector 28 connected to the endoscope processor device 14, and a light source device. 16 and a light source connector 30 connected to 16. A water supply tank 118 is connected to the light source connector 30 via an air / water supply tube 32, and a suction pump 124 is connected via a suction tube 34.

The ultrasonic processor device 12 generates an ultrasonic image based on the ultrasonic detection signal output from the ultrasonic endoscope 10. The endoscopic processor device 14 generates an endoscopic image based on the imaging signal output from the ultrasonic endoscope 10.

The light source device 16 is connected to the insertion portion 20, the operation portion 22, the universal cord 24, and an incident end of a light guide 128 (see FIG. 2) inserted through the light source connector 30. The light source device 16 supplies illumination light to the incident end of the light guide 128. This illumination light is emitted from the light guide 128 to a site to be observed through a pair of illumination windows 90 (see FIG. 3) described later.

The monitor 18 is connected to both the ultrasonic processor device 12 and the endoscope processor device 14. The monitor 18 generates an ultrasonic image generated by the ultrasonic processor device 12 and the endoscope processor device 14. The displayed endoscopic image is displayed. Only one of these ultrasonic images and endoscope images can be selectively displayed, or both can be displayed simultaneously.

The operation unit 22 is provided with an air / water supply button 36 and a suction button 38, and a pair of angle knobs 42, an operation lever 43, a treatment instrument insertion port 44 such as a forceps port, and the like.

The insertion portion 20 has a distal end, a proximal end, and a longitudinal axis, and has a distal end portion 50, a bending portion 52, and a flexible portion 54 in order from the distal end side toward the proximal end side. The tip portion 50 is formed of a hard member and is also referred to as a tip hard portion. The distal end portion 50 is provided with an ultrasonic transducer 62 described later, and a balloon 64 covering the ultrasonic transducer 62 is detachably attached.

One end of the bending portion 52 is connected to the proximal end side of the distal end portion 50, and the other end is connected to the distal end side of the flexible portion 54. The bending portion 52 is configured to be freely bent and is remotely bent by turning the pair of angle knobs 42 described above. Thereby, the front-end | tip part 50 can be orient | assigned to a desired direction.

The soft portion 54 has a small diameter and a long length and is flexible, and connects the bending portion 52 and the operation portion 22.

FIG. 2 is a schematic view showing a pipe configuration of the ultrasonic endoscope 10. As shown in FIG. 2, a treatment instrument channel 100, an air / water supply conduit 102, and a balloon conduit 104 whose one end communicates with the internal space of the balloon 64 are provided inside the insertion portion 20 and the operation portion 22. ing.

One end of the treatment instrument channel 100 is connected to a treatment instrument outlet 94 (see FIG. 3) described later, and the other end is connected to a treatment instrument insertion port 44 of the operation unit 22. Further, a suction conduit 106 is branched from the treatment instrument channel 100, and the suction conduit 106 is connected to the suction button 38 of the operation unit 22.

One end of the air / water supply conduit 102 is connected to an air / water supply nozzle 92 (see FIG. 3) described later, and the other end is branched into an air supply conduit 108 and a water supply conduit 110. The air supply conduit 108 and the water supply conduit 110 are connected to the air / water supply button 36 of the operation unit 22.

One end of the balloon conduit 104 is connected to a supply / exhaust port 70a (see FIG. 5) that is open at a position inside the balloon 64 in the outer peripheral surface of the distal end portion 50, and the other end is connected to the balloon water supply conduit 112. Branching to a balloon drain 114. The balloon water supply pipeline 112 is connected to the air / water supply button 36, and the balloon drainage pipeline 114 is connected to the suction button 38.

The air / water supply button 36 includes an air supply line 108, a water supply line 110, and a balloon water supply line 112, one end of an air supply source line 116 leading to an air supply pump 129, and a water supply tank 118. One end of the water source pipeline 120 is connected. The air supply pump 129 always operates during ultrasonic observation.

A branch line 122 is branched from the air supply source line 116, and this branch line 122 is connected to the inlet (on the liquid surface) of the water supply tank 118. Further, the other end of the water supply source line 120 is inserted into the water supply tank 118 (below the liquid level). Then, when the internal pressure of the water supply tank 118 rises due to air supply from the air supply pump 129 via the branch line 122, the water in the water supply tank 118 is supplied to the water supply source line 120.

As the air / water supply button 36, a known two-stage switching button is used. The air / water supply button 36 is configured to cause leakage of air sent from the air supply source line 116, ejection of air from the air / water supply nozzle 92, and water from the air / water supply nozzle 92 according to the operation of the operator. Switching between jetting and water feeding into the balloon 64 is performed. In addition, since it is a well-known technique about the concrete switching method, description is abbreviate | omitted here (for example, refer international publication 2015/151968).

In addition to the suction conduit 106 and the balloon drain conduit 114, one end of the suction source conduit 126 is connected to the suction button 38. A suction pump 124 is connected to the other end of the suction source line 126. The suction pump 124 is always operated during the ultrasonic observation. The suction button 38 is a two-stage switchable button, similar to the air / water supply button 36.

The suction button 38 is connected to the outside (atmosphere) in accordance with the operation of the operator, suction of various aspirates from the treatment instrument outlet 94 (see FIG. 3), and the inside of the balloon 64. Switch between draining water. In addition, since it is a well-known technique about the concrete switching method, description is abbreviate | omitted here (for example, refer international publication 2015/151968).

Referring back to FIG. 1, the operation lever 43 of the operation unit 22 is used for changing the derivation direction of the treatment instrument derived from the treatment instrument derivation port 94 (see FIG. 3).

[Configuration of the tip of the insertion section]
FIG. 3 is an external perspective view of the distal end portion 50 of the insertion portion 20. FIG. 4 is a left side view when the distal end portion 50 of the insertion portion 20 is viewed from the distal end side. FIG. 5 is a right side view when the distal end portion 50 of the insertion portion 20 is viewed from the distal end side. FIG. 6 is an exploded perspective view of the distal end portion 50 of the insertion portion 20. 3 and 6, the balloon 64 is not shown. In FIG. 6, illustration of the light guide 128 and an endoscope observation unit 80 described later is omitted.

As shown in FIGS. 3 to 6, the distal end portion 50 includes an ultrasonic observation unit 60 that acquires an ultrasonic detection signal from the distal end side toward the proximal end side, and an endoscope observation that acquires an imaging signal. A portion 80 is provided. In addition, the distal end portion 50 is provided with an upright table 96 between the ultrasonic observation portion 60 and the endoscope observation portion 80 that can change the direction in which the treatment instrument is led out. Further, the distal end portion 50 includes a balloon 64, a housing member 72 (also referred to as an exterior member or a case), a lever storage lid 76, and an upright stand assembly 200 (see FIG. 6).

The ultrasonic observation unit 60 includes an ultrasonic transducer 62 composed of a plurality of ultrasonic transducers. Each ultrasonic transducer of the ultrasonic transducer 62 is sequentially driven based on a drive signal input from the ultrasonic processor device 12. Thereby, each ultrasonic transducer sequentially generates ultrasonic waves toward the observation site and receives ultrasonic echoes (echo signals) reflected from the observation site. Each ultrasonic transducer transmits an ultrasonic detection signal (electric signal) corresponding to the received ultrasonic echo through a signal cable (not shown) inserted into the insertion unit 20 and the universal cord 24 and the like. Output to the ultrasonic processor unit 12. As a result, an ultrasonic image is generated by the ultrasonic processor device 12.

The balloon 64 is attached to the housing member 72 of the distal end portion 50 in order to prevent attenuation of ultrasonic waves and ultrasonic echoes, and is formed in a bag shape that covers the ultrasonic transducer 62. The balloon 64 is formed of a stretchable elastic material such as latex rubber, for example, and a retractable locking ring 66 is provided at an opening end thereof. On the other hand, a locking groove 68 is provided between the ultrasonic observation unit 60 and the stand 96 at the tip 50 over the entire circumference of the tip 50 in the circumferential direction. Then, the balloon 64 is detachably attached to the distal end portion 50 by fitting the locking ring 66 into the locking groove 68.

The balloon 64 is inserted into the body cavity in a contracted state so as to be in close contact with the outer wall surface of the housing member 72 of the distal end portion 50. When ultrasonic waves are generated from the ultrasonic transducers of the ultrasonic transducer 62 toward the site to be observed, water (deaerated water or the like) is supplied into the balloon 64 according to the operation of the air / water supply button 36. As a result, the balloon 64 is inflated until it comes into contact with the inner wall of the body cavity. Further, when the insertion portion 20 is pulled out of the body cavity, the balloon 64 contracts in the same manner as when the insertion portion 20 is inserted into the body cavity by discharging the water inside the balloon 64 according to the operation of the suction button 38. .

The endoscope observation part 80 is provided on the slope part 86 of the housing member 72 of the tip part 50. The slope portion 86 is provided at a position on the proximal end side of a treatment instrument outlet 94 described later in the distal end portion 50 and is formed obliquely with respect to the axial direction of the distal end portion 50. The endoscope observation unit 80 includes an observation unit and an illumination unit.

The observation part of the endoscope observation part 80 has an observation window 88 (see FIG. 3). Although not shown, behind the observation window 88, an objective lens of the observation optical system, and a CCD (Charge-Coupled Device) type or a CMOS (Complementary Metal-Oxide Semiconductor) type arranged at the imaging position of the objective lens. The image pickup device and the like are arranged. The imaging device captures an observation image captured from the observation window 88. Then, the imaging element outputs the imaging signal of the observation image to the endoscope processor device 14 via a signal cable (not shown) inserted through the insertion unit 20 and the universal cord 24. As a result, an endoscope image is generated by the endoscope processor device 14.

The illumination unit of the endoscope observation unit 80 has a pair of illumination windows 90 (see FIG. 3), and the exit ends of the light guides 128 described above are arranged behind the illumination windows 90, respectively. Yes. Therefore, by connecting the light source connector 30 to the light source device 16 as shown in FIG. 2 described above, the illumination light emitted from the light source device 16 is guided to each illumination window 90 via the light guide 128, The light is emitted forward from each illumination window 90.

In addition to the observation window 88 and the illumination window 90 described above, an air / water supply nozzle 92 is provided on the slope 86 in the vicinity of the observation window 88. The air / water supply nozzle 92 is connected to one end of the air / water supply pipe line 102 shown in FIG. 2 described above, and is directed toward the observation window 88 in order to clean the foreign matter adhering to the surface of the observation window 88. Spout water or air.

The housing member 72 holds or stores each part of the ultrasonic observation unit 60 and the endoscope observation unit 80 described above, and an upright stand 96 and an upright stand assembly 200 described later. A portion of the housing member 72 that is closer to the proximal end than the ultrasonic observation unit 60 is divided into two in the vertical direction in the figure with a plane parallel to the axial direction of the distal end portion 50 as a boundary. That is, the housing member 72 has a structure in which a first housing member 72a located on the lower side in the drawing and a second housing member 72b located on the upper side in the drawing are connected. And the stand 96 and the stand assembly 200 are accommodated between the 1st housing member 72a and the 2nd housing member 72b.

The first housing member 72 a holds the ultrasonic observation unit 60 and has a locking groove 68. Further, when the distal end portion 50 is viewed from the distal end side, on the right side surface of the first housing member 72a (see FIG. 5) and on the distal end side with respect to the locking groove 68, the axial direction of the distal end portion 50 is provided. A groove 74 is formed along. The groove 74 is formed so that at least a part thereof overlaps the ultrasonic transducer 62 in the axial direction of the tip 50.

Furthermore, at the base end of the groove 74, a supply / discharge port 70a which is an opening on the distal end side of the balloon conduit 104 shown in FIG. Thereby, water can be supplied to the inside of the balloon 64 through the supply / discharge port 70a, or the water inside the balloon 64 can be discharged.

The second housing member 72b holds the endoscope observation part 80 and has a sloped part 86. In addition, a treatment instrument outlet 94 for guiding the treatment instrument is formed on the upper surface of the second housing member 72b in the drawing at a position closer to the distal end than the endoscope observation section 80 (slope section 86). And when the 1st housing member 72a and the 2nd housing member 72b are connected, inside the treatment tool outlet 94, the stand support chamber 94a which is the space which stores the stand 96 is formed.

When the distal end portion 50 is viewed from the distal end side, both the first housing member 72a and the second housing member 72b have a partition wall 73 (see FIG. 6) that constitutes the right side surface of the stand support chamber 94a so as to straddle both. Reference) is formed. Further, both the first housing member 72a and the second housing member 72b are located on the left side surfaces of the upright stand assembly 200 at a position facing a later-described lever housing chamber 212 (see FIG. 6). A fitting hole 75 into which the lever storage lid 76 is fitted is formed.

The treatment instrument channel 100 shown in FIG. 2 described above is connected to the upright stand accommodating chamber 94a. For this reason, the treatment instrument inserted into the treatment instrument insertion port 44 is introduced into the body cavity from the treatment instrument outlet port 94 via the treatment instrument channel 100 and the upright storage chamber 94a.

The stand 96 is rotatably attached to the stand assembly 200 via a rotation shaft 216 (see FIG. 7) having a two-part structure described later in the stand storage chamber 94a. The stand 96 changes the direction of the treatment tool guided from the treatment tool channel 100 into the stand support chamber 94 a and guides the treatment tool from the treatment tool outlet 94. As will be described in detail later, the stand 96 is rotated in the stand receiving chamber 94a in response to the operation of the operation lever 43, whereby the treatment instrument is introduced into the body cavity from the treatment instrument outlet 94. Is variable.

The lever storage lid 76 corresponds to the lid of the present invention, and constitutes a part of the outer peripheral surface of the housing member 72, that is, a part of the outer peripheral surface of the distal end portion 50. The lever storage lid 76 is detachably attached to the stand assembly 200 with bolts 77 in a state of being fitted in the fitting hole 75 of the housing member 72. The lid inner surface 244 (see FIG. 17) of the lever storage lid 76 on the upright assembly 200 side is provided with a lid seal member 76a and a first restricting portion 250 (see FIG. 17). ing. Further, the lever storage lid 76 is formed with an insertion hole 76b through which the bolt 77 is inserted.

[Configuration of the stand assembly]
FIG. 7 is an exploded perspective view of the stand assembly 200, FIG. 8 is a right side view of the stand assembly 200 when the tip 50 is viewed from the tip, and FIG. It is a front view of the stand assembly 200 when viewed from the side.

As shown in FIGS. 7 to 9 and FIG. 6 described above, the stand assembly 200 is made of, for example, a metal material having corrosion resistance, and includes a base 202 and a partition wall 204 extending from the base 202 to the tip side. And having. A part of the distal end surface of the base 202 constitutes a side surface on the proximal end side of the upright stand accommodating chamber 94a. In addition, a communication hole 202 a that communicates with the treatment instrument channel 100 connected to the base end side is formed in the distal end surface of the base 202. As a result, the treatment instrument channel 100 and the upright storage chamber 94a are connected via the communication hole 202a.

The partition wall 204 includes a side wall surface 206 that is the left side surface when the upright assembly 200 is viewed from the front end side, and a facing wall surface 208 that is the right side surface opposite to the side wall surface 206 and faces the upright table 96. Have.

On the side wall surface 206, a lever housing chamber 212 for housing the upright stand upstanding lever 210 is formed. In other words, the partition wall 204 is provided between the upright stand 96 (the upright stand accommodating chamber 94a) and the upright stand upright lever 210 (the lever accommodating chamber 212).

The partition wall 204 includes a first storage chamber wall surface 212a that forms the bottom surface of the lever storage chamber 212 on the upstand 96 side, and a second storage chamber wall surface 212b that forms the side surface of the lever storage chamber 212 (see FIG. 7). .

A holding hole 214 is formed in the first storage chamber wall surface 212a so as to pass through the partition wall 204 along the axial direction of a later-described rotating shaft 216 that connects the stand 96 and the stand stand lever 210, and communicates with the stand storage chamber 94a. Is formed. The holding hole 214 rotatably supports the rotating shaft 216. Since the upright stand upright lever 210 in the lever housing chamber 212 rotates (swings) about the rotation shaft 216, the lever housing chamber 212 is formed in a fan shape (fan shape) around the rotation shaft 216. Yes.

A wire insertion hole 224 (see FIG. 7) through which an operation wire 222 described later is inserted is formed in the second storage chamber wall surface 212b.

The side of the lever storage chamber 212 facing the lever storage lid 76 is open. For this reason, the lever accommodating chamber 212 has an exposure window 218 (see FIG. 7) formed by an edge portion of the second accommodating chamber wall surface 212b on the lever accommodating lid 76 side, which will be described later in detail. The exposure window 218 exposes the upright stand erecting lever 210 in the lever accommodating chamber 212.

In addition, the bolt 77 described above is screwed into a peripheral area of the lever housing chamber 212 in the side wall surface 206, that is, an area different from the formation area of the lever housing chamber 212 and covered with the lever housing lid 76. A bolt hole 220 is formed. The numbers of bolts 77 and bolt holes 220 are not particularly limited.

The opposing wall surface 208 constitutes the left side surface of the upright stand accommodating chamber 94a when the upright stand assembly 200 is viewed from the front end side. A holding hole opening 214 a (see FIG. 8) that is an opening on the upright base 96 side of the holding hole 214 is formed in the facing wall surface 208. Further, the opposed wall surface 208 is formed with a notch 208 a into which a part of the upright stand 96 enters. The notch 208 a has a shape that does not hinder the rotation of the upright 96 around the rotation shaft 216.

[Configuration of stand, stand stand lever, and rotating shaft]
A stand 96 is connected to one end of the stand stand lever 210 via a rotating shaft 216 having a two-part structure, which will be described later. Specifically, in the present embodiment, by connecting the rotary shaft 216 having a two-part structure with the bolt 211, the upright stand rising lever 210 and the upright stand 96 are connected via the rotary shaft 216 (see FIG. 7). As a result, the upright stand raising lever 210 rotates (swings) integrally with the upright stand 96 around the rotation shaft 216. In addition, an operation wire 222 (see FIG. 6) is connected to the other end side of the upright stand raising lever 210.

The operation wire 222 has a distal end side coupling portion 222a (see FIG. 6) that is coupled to the upright stand erecting lever 210 in the lever accommodating chamber 212 on the distal end side. In addition, the operation wire 222 has a base end side that is connected to a stand operating mechanism 226 (see FIG. 10) in the operation unit 22 through the insertion portion 20 from the wire insertion hole 224 of the lever housing chamber 212.

FIG. 10 is a schematic view showing an example of the upright stand operating mechanism 226. As shown in FIG. 10, the operation wire 222 has a base end side connecting portion 222 b that is connected to the stand operating mechanism 226 on the base end side. The stand operating mechanism 226 includes an operating lever 43 corresponding to the operating member of the present invention, a rotating drum 226A to which the operating lever 43 is coupled and rotatable within a certain angle range, and a crank member 226B coupled to the rotating drum 226A. And a slider 226C coupled to the crank member 226B. The proximal end side connecting part 222b is connected to the slider 226C.

When the operation lever 43 is operated to rotate the rotating drum 226A, the operation wire 222 is pushed and pulled through the crank member 226B and the slider 226C, so that the upright stand rising lever 210 is swung. In response to the swing of 210, the stand 96 rotates (swings) about the rotation shaft 216.

FIG. 11 is an explanatory diagram for explaining the rotation of the stand 96 according to the operation of the operation lever 43. As indicated by reference numeral XIA in FIG. 11, when the operation lever 43 is operated to rotate the rotating drum 226 </ b> A in one direction, the operation wire 222 is pushed, so that the upright stand elevating lever 210 is centered on the rotation shaft 216. The stand 96 rotates in the R1 direction and falls. On the other hand, when the operation lever 43 is operated to rotate the rotating drum 226A in the reverse direction as indicated by reference numeral XIB, the operation wire 222 is pulled, and the upright stand elevating lever 210 is moved around the rotation shaft 216 in the R1 direction. Rotates in the opposite R2 direction, and the stand 96 stands up. As described above, the operation wire 222 can displace (stand up and fall) the stand 96 by rotating the rotating shaft 216 via the stand stand up lever 210 by operating the operation lever 43.

FIG. 12 is an external perspective view of the stand 96. As shown in FIG. 12, the stand 96 has an arcuate guide surface 96 a whose surface facing the communication hole 202 a guides the treatment tool guided into the stand storage chamber 94 a toward the treatment tool outlet 94. It becomes. In addition, an upright stand rotating shaft 216a that constitutes a part of the rotating shaft 216 and corresponds to the second rotating shaft of the present invention is connected (including integrally formed) to the base end portion of the upright stand 96. In addition, the connection method of the stand 96 and the stand rotating shaft 216a is not specifically limited, Furthermore, both may not be integrally formed but a separate body may be sufficient.

The upright stand rotating shaft 216a is inserted into the holding hole 214 from the upright stand accommodating chamber 94a side. One end of the upright rotating shaft 216a is connected to the base end of the upright 96 as described above, and the other end has a connecting portion 230a corresponding to the second connecting portion of the present invention. The connecting portion 230 a has an axial shape that protrudes toward the upright stand erecting lever 210 along the axial direction of the rotating shaft 216.

Further, a screw hole 232 into which the tip of the bolt 211 shown in FIG. 7 or the like described above is screwed is formed in the upright stand rotating shaft 216a (connecting portion 230a). Further, a first groove wall surface 234a and a groove bottom surface 234b constituting a part of a later-described seal member mounting groove 234 (see FIG. 15) are formed on the outer peripheral surface on the other end side of the upright stand rotating shaft 216a. .

FIG. 13 is an external perspective view of the upright stand elevating lever 210 as viewed from the lever storage lid 76 side. FIG. 14 is an external perspective view of the upright stand elevating lever 210 as seen from the upright stand 96 side.

As shown in FIG. 13 and FIG. 14, the upright stand elevating lever 210 has a lever main body portion 210 a, a lever base end portion 210 b, and a lever tip end portion 210 c. The side surface of the upright stand upright lever 210 on the side facing the lever storage lid 76 (the side opposite to the rotating shaft side of the present invention) is defined as a first lever side surface 246. In addition, the side surface of the lever main body portion 210a in the first lever side surface 246 is referred to as a main body side surface 246a. Further, a side surface of the upright stand elevating lever 210 opposite to the first lever side surface 246 (the rotating shaft side of the present invention) is defined as a second lever side surface 248.

The lever base end portion 210b is provided on one end side of the lever main body portion 210a. The lever base end portion 210b is connected to an upright lever rotating shaft 216b that constitutes a part of the rotating shaft 216 and corresponds to the first rotating shaft of the present invention. In addition, the connection method of the upright lever rotating shaft 216b and the lever base end portion 210b is not particularly limited, and the both may not be integrally formed but may be formed separately.

The lever tip portion 210c is provided on the other end side of the lever main body portion 210a and has a wire connecting portion 235. The wire connecting portion 235 is connected to the distal end side connecting portion 222a of the operation wire 222 described above.

The upright lever rotating shaft 216b is inserted into the holding hole 214 from the lever housing chamber 212 side. One end of the upright lever rotating shaft 216b is connected to the lever base end portion 210b of the upright stand upright lever 210 as described above. At this time, when the stand assembly 200 is viewed from the front end side thereof as shown in FIG. 17 described later, the stand lever rotating shaft 216b is closer to the stand 96 side than the stand stand up lever 210 (in FIG. 17 described later). It is provided at a position retracted in the second direction DR side. Accordingly, as described with reference to FIG. 29 described above, even if the length of the upright stand upright lever 210 is increased in order to improve the upright performance, the upright lever rotating shaft 216b is placed on the inner peripheral surface of the tip 50. Since it becomes difficult to interfere, the increase in the diameter of the front-end | tip part 50 is suppressed (refer FIG. 17). That is, the diameter of the tip 50 can be reduced.

Further, the upright lever rotating shaft 216b has a connecting portion 230b corresponding to the first connecting portion of the present invention at the other end. The connecting portion 230b is provided on the end surface on the other end side of the upright lever rotating shaft 216b (opposing surface facing the upright stand rotating shaft 216a), and is a fitting hole into which the above-described connecting portion 230a is fitted. .

Furthermore, the upright lever rotating shaft 216b is formed with an insertion hole 236 through which the bolt 211 shown in FIG. Furthermore, the end face on the other end side of the upright lever rotating shaft 216b and the outer peripheral portion of the connecting portion 230b serve as a second groove wall surface 234c constituting a part of a seal member mounting groove 234 (see FIG. 15) described later. Function.

FIG. 15 is an explanatory diagram for explaining a connection state between the upright stand rotating shaft 216a and the upright lever rotating shaft 216b. As shown in FIGS. 12 to 15, the connecting portion 230a of the upright stand rotating shaft 216a and the connecting portion 230b of the upright lever rotating shaft 216b are connected in the holding hole 214 shown in FIG. At this time, the connecting

portions

230a and 230b have a shape in which the upright stand rotating shaft 216a and the upright lever rotating shaft 216b are connected to each other so as not to be relatively rotatable. In addition, the shape of the

connection parts

230a and 230b is not limited to the shape shown in each figure, You may change suitably.

The bolt 211 is inserted into the insertion hole 236 from one end side of the upright lever rotating shaft 216b in a state where the connecting

portions

230a and 230b are connected, and then screwed into the screw hole 232 of the upright base rotating shaft 216a. Thereby, the stand 96, the stand stand lever 210, and the rotating shaft 216 are integrated. As a result, the stand 96 and the stand stand lever 210 rotate (oscillate) integrally around the rotation shaft 216 (the stand turn shaft 216a and the stand lever turn shaft 216b).

Further, by connecting the upright stand rotating shaft 216a and the upright lever rotating shaft 216b, the first groove wall surface 234a, the groove bottom surface 234b, and the second groove wall surface are formed on the outer peripheral surface of the rotating shaft 216 along the circumferential direction thereof. 234c forms an annular seal member mounting groove 234. In other words, the rotating shaft 216 has the second groove wall surface 234c on the first direction DL side of the seal member mounting groove 234 (see FIG. 17, corresponding to the upright stand rising lever side of the present invention) as a boundary, and the upright rotating shaft 216a. And the upright lever rotating shaft 216b. A seal member 256 described later is attached to the seal member attachment groove 234 (see FIG. 17).

[Configuration of lever storage lid]
FIG. 16 is an explanatory diagram for explaining the exposure window 218 and the lever storage lid 76 of the lever storage chamber 212. As shown in FIG. 16, the upright stand raising lever 210 rotates (swings) around the rotation shaft 216 in the lever housing chamber 212. For this reason, the exposure window 218 has a shape that exposes the rotation range of the upright stand elevating lever 210 that rotates about the rotation axis 216. Therefore, the exposure window 218 can expose the first lever side surface 246 of the upright stand upright lever 210 at each rotational position of the upright stand upright lever 210.

The lever storage lid 76 is fitted in the fitting hole 75 of the housing member 72 and covers at least the exposure window 218 of the lever storage chamber 212. The lever storage lid 76 is configured such that the bolt 77 is screwed into the bolt hole 220 of the upright base assembly 200 through the insertion hole 76 b or the bolt 77 is removed from the bolt hole 220, thereby exposing the exposure window 218 (lever storage chamber 212). Cover detachably. As a result, even in the ultrasonic endoscope 10 in which the ultrasonic transducer 62 is obstructed and the distal end portion 50 cannot have a detachable cap structure like a side-view type endoscope (for example, a duodenoscope), the lever By removing the storage lid 76 from the stand assembly 200, the exposure window 218 (lever storage chamber 212) can be exposed. As a result, it is possible to easily replace or clean the stand raising lever 210 of the ultrasonic endoscope 10 and a seal member 256 (see FIG. 17) described later.

In this embodiment, the lever storage lid 76 is attached to the upright base assembly 200 (the fitting hole 75 of the housing member 72) using the bolt 77, but an attachment method other than the bolt 77 may be adopted.

The lid seal member 76a corresponds to the lid hermetic holding member of the present invention, and is formed of an elastic material such as rubber, for example. The lid seal member 76a is provided along the edge of the lid inner surface 244 (see FIG. 17) of the lever storage lid 76, for example, and has a substantially frame shape. Then, when the lever storage lid 76 is attached to the stand assembly 200, the lid seal member 76a is brought into pressure contact with the side wall surface 206 (periphery portion of the exposure window 218) of the stand assembly 200. Thereby, airtightness between the lever storage lid 76 and the exposure window 218 (lever storage chamber 212) is maintained.

If the airtightness between the lever storage lid 76 and the exposure window 218 can be maintained, the position where the lid seal member 76a is provided on the lid inner surface 244 (see FIG. 17) and the shape of the lid seal member 76a are particularly limited. It is not something. Further, instead of providing the lid seal member 76 a on the lid inner surface 244, a lid airtight holding member such as the lid seal member 76 a may be provided on the side wall surface 206 of the stand assembly 200, or the lever storage lid 76 and the stand assembly 200. A sealing material (lid tightness holding member) may be applied to the joint surface.

[Configuration of the first restricting portion and the second restricting portion]
FIG. 17 is a cross-sectional view of the stand 96, the stand stand lever 210, and the rotating shaft 216 inserted through the holding hole 214. In FIG. 17, the operation wire 222 is not shown. Also, in the figure, among the directions parallel to the axial direction of the rotation shaft 216, the direction from the upright 96 to the upright stand up lever 210 is defined as a first direction DL, and the direction opposite to the first direction DL is the second direction. Let it be DR.

As shown in FIG. 17, both side surfaces of the upright stand 96 on the first direction DL side and the second direction DR side, and the inner wall surfaces of the upright stand accommodating chamber 94a facing the both side surfaces (the opposite wall surface 208 and the like in FIG. 8). ) Between them is secured. As a result, it is possible to improve the cleaning performance and facilitate the cleaning operation, such as the wraparound of the cleaning liquid described above, the insertion property of the cleaning brush, and the drainability. Thus, in this embodiment, since the clearance gap is ensured between the both sides | surfaces of the stand 96, and the inner wall surface of the stand accommodation chamber 94a, the stand 96, the stand stand lever 210, and the rotating shaft 216 ( Hereinafter, the displacement in the first direction DL and the displacement in the second direction DR of the upright stand raising lever 210 and the like are restricted.

Specifically, in the present embodiment, the first restricting portion 250 provided on the lid inner surface 244 of the lever storage lid 76 regulates the displacement of the upright stand upright lever 210 and the like in the first direction DL, and the first in the lever housing chamber 212. The displacement in the second direction DR of the erection stand erecting lever 210 and the like is regulated by the second regulating portion 252 provided on the storage chamber wall surface 212a.

FIG. 18 is an enlarged view of the lid inner surface 244 of the lever storage lid 76. As shown in FIG. 18 and FIG. 17 described above, the first restricting portion 250 is provided in the lid inner surface 244 at a position facing the body side surface 246a of the lever body 210a of the upright stand erecting lever 210. .

The first restricting portion 250 may be formed of the same material as the lever storage lid 76, or may be formed of different materials (such as an elastic material and a low friction material). For example, when viewed from the front end side of the stand assembly 200 (see FIG. 17), the first restricting portion 250 has a shape protruding from the lid inner surface 244 in the second direction DR. Specifically, when the lever storage lid 76 is attached to the upright assembly 200, the first restricting portion 250 protrudes close to or abuts against the main body side surface 246a of the upright stand upright lever 210 in the lever storage chamber 212. Has been adjusted.

For example, when the lid inner surface 244 of the lever storage lid 76 is viewed from the front side thereof (see FIG. 18), the first restricting portion 250 has the R1 direction and the R2 direction (see FIG. 11) described above around the rotation shaft 216. ), The main body side surface 246a of the upright stand elevating lever 210 has a shape along a rotation locus. Accordingly, the first restricting portion 250 approaches or abuts against the main body side surface 246a of the upright stand upright lever 210 at each rotation position of the upright stand upright lever 210 that rotates about the rotation shaft 216.

In this way, the first restricting portion 250 is interposed between the main body side surface 246a and the lid inner surface 244 at each rotation position of the stand upright lever 210, whereby the stand upright standup lever 210 and the like in the first direction DL. Displacement (displacement toward the lever storage lid 76) can be restricted.

FIG. 19 is an enlarged view of the lever tip portion 210c (wire connecting portion 235) and the wire insertion hole 224 in FIG. As shown in FIG. 19, when the wire insertion hole 224 opened in the second storage chamber wall surface 212b is viewed from the distal end side (front side of the distal end side) of the stand assembly 200, the center position CH of the wire insertion hole 224 is shown in the figure. The formation position of the wire insertion hole 224 in the second storage chamber wall surface 212b is adjusted so as to shift to the second direction DR side (the standing base side of the present invention) from the position of the lever tip portion 210c indicated by the straight line LT. ing.

In this case, when the distal end side coupling portion 222a (see FIG. 11 or the like) of the operation wire 222 is coupled to the wire coupling portion 235 of the lever distal end portion 210c, the axis line of the rotary shaft 216 from the operation wire 222 to the lever distal end portion 210c. In the direction, a force in the second direction DR is applied. As a result, the displacement of the upright stand raising lever 210 and the like in the first direction DL is more reliably regulated. When the wire insertion hole 224 is viewed from the front end side of the stand assembly 200, the center position CH in the axial direction of the rotating shaft 216 may be the same position as the lever front end portion 210c.

Returning to FIG. 17, the second restricting portion 252 is provided at a position facing the second lever side surface 248 of the upright stand erecting lever 210 (lever body portion 210 a) in the first accommodating chamber wall surface 212 a of the lever accommodating chamber 212. It has been. In addition, the 2nd control part 252 may be formed with the same material as the partition 204, or may be formed with a different material (an elastic material, a low friction material, etc.).

For example, when viewed from the front end side of the stand assembly 200, the second restricting portion 252 has a shape protruding from the first storage chamber wall surface 212a in the first direction DL. Specifically, the second restricting portion 252 is adjusted to a protruding amount that comes close to or comes into contact with the upright stand erecting lever 210 (lever main body portion 210a) in the lever accommodating chamber 212.

Although not shown, the second restricting portion 252 has a second lever side surface 248 of the upright stand erecting lever 210 that rotates around the rotation shaft 216 when the first storage chamber wall surface 212a is viewed from the front side. It has a shape along at least a part of the trajectory. As a result, the second restricting portion 252 also approaches or comes into contact with the upright stand upright lever 210 (main body side surface 246a) at each rotation position of the upright stand upright lever 210 that rotates about the rotation shaft 216.

As described above, since the second restricting portion 252 is interposed between the second lever side surface 248 and the first storage chamber wall surface 212a at each rotational position of the upright stand upright lever 210, the second direction of the upright stand upright lever 210 and the like. The displacement to DR can be regulated.

[Configuration of seal member]
FIG. 20 is an enlarged view of the rotating shaft 216 and the seal member 256 in FIG. As shown in FIG. 20 and FIG. 17 described above, an annular seal member mounting groove 234 composed of a first groove wall surface 234a, a groove bottom surface 234b, and a second groove wall surface 234c is formed on the outer peripheral surface of the rotating shaft 216. It is formed. The seal member mounting groove 234 is more first than the holding hole opening 214a of the holding hole 214 described above in a state in which the position of the upright stand raising lever 210 and the like is restricted by the first restricting portion 250 and the second restricting portion 252. It is formed from the position on the direction DL side (the standing stand erecting lever side of the present invention) to the position on the second direction DR side (the standing stand side of the present invention) rather than the holding hole opening 214a. That is, a part of the seal member mounting groove 234 is located inside the holding hole 214 in the axial direction of the rotating shaft 216, and the rest is located outside the holding hole 214. An annular seal member 256 is fitted in the seal member mounting groove 234.

The seal member 256 is inserted with the rotary shaft 216 and maintains airtightness between the outer peripheral surface of the rotary shaft 216 and the inner wall surface of the holding hole 214. The end of the sealing member 256 on the second direction DR side is exposed (protruded) from the holding hole opening 214a of the holding hole 214 to the second direction DR side. For this reason, even when a liquid such as blood or water (hereinafter simply referred to as a liquid) enters the upright storage chamber 94a, the space between the outer peripheral surface of the rotating shaft 216 and the inner wall surface of the holding hole 214 is reached. Intrusion of the liquid can be prevented by the seal member 256.

The seal member 256 has a so-called oil seal structure, and includes a first wall portion 256a, a second wall portion 256b, a third wall portion 256c, and a compression spring 256d, each of which is formed in an annular shape. . The first wall portion 256a, the second wall portion 256b, and the third wall portion 256c are integrally formed of, for example, a resin material having a low friction coefficient.

The first wall portion 256a has a known lip portion (for example, a dust lip portion, a lip tip portion, and a seal lip portion) (not shown), and is in close contact with the groove bottom surface 234b of the seal member mounting groove 234. The second wall portion 256b is a known back face and is in close contact with the first groove wall surface 234a of the seal member mounting groove 234. The third wall portion 256c is a well-known fitting portion, and is in close contact with the inner wall surface of the holding hole 214 in the second direction DR (that is, the stand support chamber 94a) from the holding hole opening 214a of the holding hole 214. And an exposed region U2 located in the inner).

The compression spring 256d is provided between the first wall portion 256a and the third wall portion 256c. The compression spring 256d is a biasing member that biases one of the first wall 256a and the third wall 256c in a direction away from the other. Accordingly, the first wall portion 256a can be pressed against the groove bottom surface 234b, and the third wall portion 256c can be pressed against the inner wall surface of the holding hole 214, so that the sealing function of the seal member 256 can be enhanced. An urging member other than the compression spring 256d may be used, or an elastic member such as rubber may be used instead of the urging member.

FIG. 21 is an enlarged view of the first wall portion 256a of the seal member 256. FIG. Note that reference numeral XXIA in FIG. 21 indicates a state before connection between the upright stand rotating shaft 216a and the upright lever rotating shaft 216b, and reference numeral XXIB in FIG. 21 indicates connection between the upright base rotating shaft 216a and the upright lever rotating shaft 216b. Shown later.

21, the width W1 of the first wall portion 256a is formed to be longer than the width W2 of the groove bottom surface 234b of the seal member mounting groove 234 in the axial direction of the rotation shaft 216. For this reason, as shown by reference numeral XXIB in FIG. 21, the first wall portion 256a of the seal member 256 is compressed in the axial direction of the rotary shaft 216 after the riser rotary shaft 216a and the upright lever rotary shaft 216b are connected. In this state, it is mounted in the seal member mounting groove 234. Accordingly, the second wall portion 256b of the seal member 256 is pressed against the first groove wall surface 234a of the seal member mounting groove 234 by the elastic restoring force of the first wall portion 256a. As a result, the sealing function of the sealing member 256 can be enhanced.

The third wall portion 256c of the seal member 256 has higher durability (high rigidity) than the first wall portion 256a and the second wall portion 256b. For this reason, even if the seal member 256 rotates integrally with the rotating shaft 216, the third wall portion 256c is in sliding contact with the inner wall surface of the holding hole 214 (particularly the edge portion of the holding hole opening 214a). Breakage and deterioration of the wall portion 256c are prevented. That is, in general O-rings and packings, there is a risk of cutting or twisting when stress is applied by sliding contact with the inner wall surface of the holding hole 214, but such a problem occurs in the seal member 256. Is suppressed. Further, the third wall portion 256c may be formed so that the width in the axial direction of the rotating shaft 216 is longer than the width W2 of the groove bottom surface 234b, similarly to the first wall portion 256a.

During the cleaning process of the seal member 256, the cleaning liquid such as the exposed portion U2 of the second wall portion 256b and the exposed region U2 of the third wall portion 256c easily flows around, and the cleaning brush. It is only necessary to clean a portion where it can be easily applied, improving the cleaning performance and facilitating the cleaning operation.

[Effect of this embodiment]
As described above, in the ultrasonic endoscope 10 according to the present embodiment, the first restricting portion 250 is provided with the lever so that the first restriction portion 250 is interposed between the main body side surface 246a and the lid inner surface 244 at each rotation position of the upright stand erecting lever 210. It is provided on the lid inner surface 244 of the storage lid 76. Thereby, in order to improve the standing performance of the upright stand raising lever 210, even if the length is increased, the tip 50 is not increased in diameter as shown in FIG. The displacement in the first direction DL of the upright stand erecting lever 210 and the like can be regulated by the 1 regulating unit 250. As a result, it is possible to restrict displacement of the upright stand upright lever 210 and the like in the first direction DL, improve the upright performance of the upright stand upright lever 210, and reduce the diameter of the tip 50.

Further, in the present embodiment, by providing the second restricting portion 252 on the first accommodating chamber wall surface 212a of the lever accommodating chamber 212, the displacement of the upright stand erecting lever 210 and the like in the second direction DR is also regulated. For this reason, in order to improve the cleaning property in the stand support chamber 94a and the ease of cleaning work, both side surfaces of the stand 96 on the first direction DL side and the second direction DR side and the stand support chamber 94a Even when a gap is secured between the wall surface and the wall surface, it is possible to prevent the upright stand elevating lever 210 and the like from being displaced in the axial direction of the rotating shaft 216.

Further, in the present embodiment, the seal member mounting groove 234 is configured so that the seal member 256 configured to be in close contact (pressure contact) with the first groove wall surface 234 a and the groove bottom surface 234 b of the seal member mounting groove 234 and the inner wall surface of the holding hole 214. Therefore, the airtightness between the outer peripheral surface of the rotating shaft 216 and the inner wall surface of the holding hole 214 can be reliably held.

[Modifications of the first restricting portion and the second restricting portion]
FIG. 22 is an explanatory diagram for describing a modification of the first restricting portion 250 and the second restricting portion 252. In the above embodiment, the first restricting portion 250 is provided on the inner surface 244 of the lever accommodating lid 76, and the second restricting portion 252 is provided on the first accommodating chamber wall surface 212 a of the lever accommodating chamber 212.

On the other hand, as shown in FIG. 22, the first restricting portion 250 may be provided on the side surface 246a of the main body portion of the upright stand upright lever 210. In this case, the first restricting portion 250 is adjusted to a protruding amount that approaches or comes into contact with the lid inner surface 244. For this reason, the 1st control part 250 is interposed between the main-body-part side surface 246a and the lid | cover inner surface 244 in each rotation position of the stand stand raising lever 210 rotating centering on the rotating shaft 216 similarly to the said embodiment. Therefore, the displacement of the upright stand raising lever 210 and the like in the first direction DL can be restricted.

Further, the second restricting portion 252 may be provided on the second lever side surface 248 of the upright stand erecting lever 210. In this case, the second restricting portion 252 is adjusted to a protruding amount that comes close to or comes into contact with the first storage chamber wall surface 212 a of the lever storage chamber 212. For this reason, the second restricting portion 252 is formed between the second lever side surface 248 and the first storage chamber wall surface 212a at each rotation position of the upright stand erecting lever 210 that rotates about the rotation shaft 216, as in the above embodiment. Since it is interposed, the displacement of the upright stand elevating lever 210 and the like in the second direction DR can be restricted.

Although not shown, the first restricting portion 250 is divided into two in the axial direction of the rotation shaft 216, and one of the two divided first restricting portions 250 is provided on the lid inner surface 244, and the other is provided on the main body side surface 246a. It may be provided. Then, at each rotational position of the upright stand upright lever 210, by adjusting both the positions etc. so that one and the other of the two divided first regulating portions 250 are close to or in contact with each other, the upright stand upright lever 210 etc. The displacement in the first direction DL can be restricted.

Similarly, the second restricting portion 252 is divided into two in the axial direction of the rotating shaft 216, and one of the two divided second restricting portions 252 is provided on the first storage chamber wall surface 212 a and the other is provided on the second lever side surface 248. It may be provided. Then, at each rotational position of the upright stand upright lever 210, the position of the upright stand upright lever 210, etc. is adjusted by adjusting both the positions etc. so that one and the other of the second restricting portion 252 divided into two come close to or contact each other. The displacement in the second direction DR can be restricted.

[Modification 1 of Sealing Member]
FIG. 23 is a cross-sectional view of a seal member 260 of Modification 1 different from the seal member 256 of the above embodiment. In the above embodiment, the seal member 256 is disposed between the outer peripheral surface of the rotating shaft 216 and the inner wall surface of the holding hole 214, but an annular seal member 260 is disposed between the partition wall 204 and the upright stand 96. May be.

As shown in FIG. 23, when the seal member 260 is disposed between the partition wall 204 and the stand 96, instead of forming the seal member mounting groove 234 on the outer peripheral surface of the rotary shaft 216, the rotary shaft 216 (stand base rotation One end of the shaft 216a) on the second direction DR side is extended to a position further away from the holding hole opening 214a of the holding hole 214 in the second direction DR. Thereby, a space in which the seal member 260 can be disposed is formed between the opposing wall surface 208 of the partition wall 204 and the upright stand 96.

The seal member 260 has an insertion hole 262 through which the rotation shaft 216 is inserted. The diameter of the insertion hole 262 is larger than the diameter of the rotating shaft 216. The seal member 260 has a so-called oil seal structure, and includes a fourth wall portion 260a, a fifth wall portion 260b, a sixth wall portion 260c, and a compression spring 260d, each of which is formed in an annular shape. Yes. In addition, the 4th wall part 260a, the 5th wall part 260b, and the 6th wall part 260c are integrated.

The fourth wall portion 260a is one of a known lip portion and fitting portion, and is in close contact with the opposing wall surface 208 of the partition wall 204. The fifth wall portion 260b is the other of the well-known lip portion and the fitting portion, and is in close contact with the side surface on the first direction DL side of the upright base 96 (the side surface connected to the rotation shaft 216). The sixth wall portion 260 c is a known back face and constitutes the outer peripheral surface of the seal member 260.

The compression spring 260d is provided between the fourth wall portion 260a and the fifth wall portion 260b. The compression spring 260d is an urging member that urges one of the fourth wall portion 260a and the fifth wall portion 260b in a direction away from the other. Thereby, the 4th wall part 260a can be press-contacted to the opposing wall surface 208, and the 5th wall part 260b can be press-contacted to the side surface by the side of the 1st direction DL of the stand 96. FIG. As a result, the seal member 260 can prevent the liquid from entering between the outer peripheral surface of the rotating shaft 216 and the inner wall surface of the holding hole 214, similarly to the seal member 256 of the above embodiment. An urging member other than the compression spring 260d may be used, or an elastic member such as rubber may be used instead of the urging member.

[Modification Example 2 of Sealing Member]
FIG. 24 is a cross-sectional view of an O-ring 270 of Modification 2 different from the seal member 256 of the above embodiment. FIG. 25 is an enlarged view of the O-ring 270 in FIG. In the above embodiment, the seal member 256 is used as the seal member of the present invention, and the seal member 256 is exposed from the holding hole opening 214a to the second direction DR side.

On the other hand, as shown in FIG. 24 and FIG. 25, it is located between the outer peripheral surface of the rotating shaft 216 and the inner wall surface of the holding hole 214 and more than the holding hole opening 214a (see the straight line LH in FIG. 24). An annular O-ring 270 may be provided at a position on the one-direction DL side.

In this case, the seal member mounting groove 234 (the first groove wall surface 234a, the groove bottom surface 234b, and the second groove wall surface 234c) on the outer peripheral surface of the rotation shaft 216 is closer to the first direction DL side than the holding hole opening 214a (in the present invention). It is formed on the upright stand side). The first groove wall surface 234a on the outer peripheral surface of the rotary shaft 216 (stand stand rotary shaft 216a) along the circumferential direction in the second direction DR side of the seal member mounting groove 234 (the stand base side of the present invention). An annular wall portion 272 that is an annular wall portion that constitutes is formed.

The O-ring 270 corresponds to the seal member of the present invention, and is disposed between the outer peripheral surface of the rotating shaft 216 and the inner wall surface of the holding hole 214 by being mounted in the seal member mounting groove 234. By this O-ring 270, airtightness between the outer peripheral surface of the rotating shaft 216 and the inner wall surface of the holding hole 214 is maintained.

FIG. 26 is a cross-sectional view of the annular wall portion 272 along the line 26-26 in FIG. As shown in FIG. 26 and FIG. 25 described above, the annular wall portion 272 has a shape that covers a part of the seal side surface 270 a facing the first groove wall surface 234 a in the outer surface of the O-ring 270. In other words, the annular wall portion 272 has a shape that exposes the other part (other than a part) of the seal side surface 270a into the upright stand accommodating chamber 94a through the holding hole opening 214a.

Specifically, a plurality of D-cuts 272a (corresponding to the cut portion of the present invention) parallel to the axial direction of the rotation shaft 216 are formed on the outer peripheral surface of the annular wall portion 272 at equal angular intervals with respect to the center of the rotation shaft 216. Has been. Accordingly, a gap 274 is formed between the inner wall surface of the holding hole 214 and the D cut 272a of the annular wall portion 272. As a result, when the ultrasonic endoscope 10 is cleaned, a cleaning brush can be applied to the O-ring 270 through the gap 274, or a cleaning liquid or the like can be passed to the O-ring 270. As a result, the cleaning performance of the seal side surface 270a of the O-ring 270 is improved, and the cleaning operation can be facilitated.

In FIG. 26, the annular wall portion 272 has an octagonal shape so that the cross-sectional shape of the outer peripheral surface of the annular wall portion 272, more specifically, the cross-sectional shape along the plane perpendicular to the axial direction of the rotating shaft 216 is an octagonal shape. Although eight D cuts 272a are formed on the outer peripheral surface of 272, the number of D cuts 272a formed on the outer peripheral surface of the annular wall portion 272 may be seven or less or nine or more. Moreover, you may form the cross-sectional shape of the outer peripheral surface of the annular wall part 272 in arbitrary polygonal shapes (the number of D cuts 272a is three or more).

FIG. 27 is a cross-sectional view of a modified example of the annular wall portion 272 shown in FIG. As shown in FIG. 27, instead of forming the D-cut 272 a on the outer peripheral surface of the annular wall portion 272, the diameter of the outer peripheral surface of the annular wall portion 272 may be smaller than the diameter of the rotating shaft 216. For example, the outer peripheral surface of the annular wall portion 272 is formed lower than the outer peripheral surface of the rotating shaft 216 by ΔR = 0.1 mm over the entire periphery. Also in this case, since the gap 274 is formed between the inner wall surface of the holding hole 214 and the outer peripheral surface of the annular wall portion 272, the cleaning performance of the seal side surface 270a of the O-ring 270 is improved and the cleaning operation is easy. Sex can be achieved.

In addition, as long as the gap 274 can be formed between the inner wall surface of the holding hole 214 and the outer peripheral surface of the annular wall portion 272, the outer peripheral surface of the annular wall portion 272 may be formed in an arbitrary shape.

[Others]
In each of the above embodiments, the sealing

members

256 and 260 and the O-ring 270 have been described as examples of the sealing member of the present invention. However, airtightness between the outer peripheral surface of the rotating shaft 216 and the inner wall surface of the holding hole 214 is ensured. If it can do, the kind, shape, arrangement position, etc. of a sealing member will not be specifically limited.

In the above embodiment, the rotary shaft 216 has a structure divided into the upright base rotary shaft 216a and the upright lever rotary shaft 216b. However, for example, the rotary shaft 216 has a non-split structure as shown in FIG. May be.

In the above embodiment, the first regulating portion 250 is provided on the lid inner surface 244 of the lever storage lid 76 that constitutes a part of the outer peripheral surface of the distal end portion 50. However, the inner surface of the double lid as shown in FIG. You may provide the 1st control part 250 in a lid | cover.

In the above-described embodiment, the ultrasonic endoscope 10 has been described as an example. However, the present invention is also applied to an endoscope provided with a stand 96 for guiding a treatment instrument, for example, a side-view type endoscope such as a duodenoscope. can do.

[Appendix]
As can be understood from the description of the embodiment described in detail above, the present specification includes disclosure of various technical ideas including the invention described below.

FIG. 28 is an explanatory diagram of a first restricting portion 254 according to another embodiment provided on the lid inner surface 244 of the lever storage lid 76. As shown in FIG. 28, the first restricting portion 254 is provided on the lid inner surface 244 of the lever storage lid 76 at a position facing the rotation shaft 216 (stand-up lever rotation shaft 216b). When the lever storage lid 76 is attached to the stand assembly 200, the first restricting portion 254 protrudes in the vicinity of or in contact with the end portion on the first direction DL side of the rotating shaft 216 (stand-up lever rotating shaft 216b). The amount is adjusted. As a result, the first restricting portion 254 is interposed between the rotating shaft 216 and the lid inner surface 244 at each rotational position of the stand upright lever 210. Displacement in one direction DL can be regulated.

2 Ultrasonic Inspection System 10 Ultrasound Endoscope 12 Ultrasound Processor Device 14 Endoscope Processor Device 16 Light Source Device 18 Monitor 20 Insertion Unit 22 Operation Unit 24 Universal Code 27 Ultrasound Connector 28 Endoscope Connector 30 Light source connector 32 Tube 34 Tube 36 Air / water supply button 38 Suction button 42 Angle knob 43 Operation lever 44 Treatment instrument insertion port 50 Tip portion 52 Bending portion 54 Soft portion 60 Ultrasonic observation portion 62 Ultrasonic transducer 64 Balloon 66 Locking ring 68 Locking groove 70a Supply / exhaust port 72 Housing member 72a First housing member 72b Second housing member 73 Partition wall 74 Groove portion 75 Fitting hole 76 Lever storage cover 76a Cover seal member 76b Insertion hole 77 Bolt 77b Insertion hole 80 Endoscopic observation Part 86 Slope part 88 Observation window 90 Illumination window 92 Air supply / water supply nozzle 94 Treatment instrument outlet 94a Standing table accommodating chamber 96 Standing table 96a Guide surface 100 Treatment tool channel 102 Air supply / water supply conduit 104 Balloon conduit 106 Suction conduit 108 Air supply conduit 110 Water supply conduit 112 Balloon supply Water conduit 114 Balloon drain conduit 116 Air supply source pipeline 118 Water supply tank 120 Water supply source conduit 122 Branch conduit 124 Suction pump 126 Suction source conduit 128 Light guide 129 Air pump 200 Standing stand assembly 202 Base 202a Communication hole 204 Partition wall 206 Side wall surface 208 Opposing wall surface 208a Notch portion 210 Standing stand upright lever 210a Lever main body portion 210b Lever base end portion 210c Lever tip portion 211 Bolt 212 Lever storage chamber 212a First storage chamber wall surface 212b Second storage chamber wall surface 214 Holding hole 214a Holding hole opening 21 Rotating shaft 216a Standing table rotating shaft 216b Standing lever rotating shaft 218 Exposed window 220 Bolt hole 222 Operation wire 222a Tip side connecting portion 222b Base end side connecting portion 224 Wire insertion hole 226 Standing table operating mechanism 226A Rotating drum 226B Crank member 226C Slider 230a Connecting portion 230b Connecting portion 232 Screw hole 234 Seal member mounting groove 234a First groove wall surface 234b Groove bottom surface 234c Second groove wall surface 235 Wire connecting portion 236 Insertion hole 244 Cover inner surface 246 First lever side surface 246a Main body side surface 248 Second lever side surface 250 First restriction portion 252 Second restriction portion 254 First restriction portion 256 Seal member 256a First wall portion 256b Second wall portion 256c Third wall portion 256d Compression spring 260 Seal member 260a Fourth wall portion 260b Fifth wall portion 260c 6th wall part 260 Compression spring 262 Insertion hole 270 O-ring 270a Sealing side surface 272 Annular wall 272a D cut 274 Clearance 502 Tip 506 Rotating shaft 506A Axis center 510 Standing stand upright lever 514 Lever housing chamber 516 Metal lid 518 Resin lid 520 Seal member CH Center position DL First direction DR Second direction U1 Intimate area U2 Exposed area

Claims

An insertion portion having a distal end and a proximal end;
An operation portion provided on a proximal end side of the insertion portion and having an operation member;
A stand assembly provided on a distal end side of the insertion portion;
A rotating shaft that is rotatably supported by the stand assembly;
An upright that is connected to one end of the rotating shaft and guides a treatment instrument derived from the upright assembly;
A lever main body portion, a lever base end portion provided on one end side of the lever main body portion and coupled to the other end of the rotating shaft, and a lever tip end portion provided on the other end side of the lever main body portion. An upright stand elevating lever,
A lever housing chamber provided in the upright assembly and configured to rotatably accommodate the upright stand elevating lever about the rotation axis, the first lever on the opposite side of the upright stand elevating lever from the rotation axis side; A lever accommodating chamber having an exposure window for exposing a side surface;
A proximal end connecting portion connected to the operating member; and a distal end connecting portion connected to the lever distal end portion of the upright stand elevating lever, and through the upright stand erecting lever by operating the operating member. An operation wire for rotating the rotating shaft to erect the stand.
A partition wall that is a part of the stand assembly and is provided between the lever housing chamber and the stand and has a holding hole that supports the rotating shaft;
An annular seal member, through which the rotating shaft is inserted, and maintaining airtightness between the outer peripheral surface of the rotating shaft and the inner wall surface of the holding hole;
A lid that detachably covers the exposed window;
A first restricting portion provided on at least one of a main body side surface which is a side surface of the lever main body portion and a lid inner surface of the lid on the upright stand erecting lever side of the first lever side surface, And a first, which is interposed between the side surface of the main body and the inner surface of the lid, and restricts displacement of the upright stand raising lever in a first direction on the lid side in a direction parallel to the axis of the rotating shaft. The regulatory department,
An endoscope comprising:
The partition wall includes a first storage chamber wall surface that constitutes a bottom surface of the lever storage chamber on the upright stand side, and the holding hole is open.
A second restricting portion provided on at least one of the second lever side surface on the rotating shaft side of the upright support lever and the wall surface of the first storage chamber, and the second lever side surface and the first side surface. The internal view of Claim 1 provided with the 2nd control part which interposes between 1 storage chamber wall surfaces, and controls the displacement of the said stand standup lever to the 2nd direction on the opposite side to the said 1st direction. mirror.
The endoscope according to claim 1, wherein the exposure window exposes a rotation range of the upright stand elevating lever that rotates about the rotation axis in the lever accommodating chamber.
When the first restricting portion is provided on the inner surface of the lid, the first restricting portion follows at least a part of the rotation trajectory of the side surface of the main body portion of the upright stand erecting lever that rotates about the rotation axis. The endoscope according to any one of claims 1 to 3, wherein the endoscope is interposed between the side surface of the main body and the inner surface of the lid at each rotation position of the upright stand elevating lever.
The partition includes a second storage chamber wall surface that forms a side surface of the lever storage chamber and is formed with a wire insertion hole through which the operation wire is inserted.
The center position of the wire insertion hole is shifted to the upright side from the end of the lever when the wire insertion hole is viewed from the front side of the upright assembly. The endoscope according to item 1.
The seal member is disposed between an inner wall surface of the holding hole and an outer peripheral surface of the rotating shaft, and a part of the seal member is exposed from a holding hole opening on the upright base side of the holding hole. Item 6. The endoscope according to any one of Items 1 to 5.
An annular seal on which the seal member is fitted on the outer peripheral surface of the rotating shaft from a position closer to the upright stand raising lever than the holding hole opening to a position closer to the upright stand than the holding hole opening. A member mounting groove is formed,
The sealing member is
A first wall portion that is in close contact with the groove bottom surface of the seal member mounting groove;
A second wall portion in close contact with the first groove wall surface on the upright side of the seal member mounting groove;
A third wall portion having an intimate region in close contact with an inner wall surface of the holding hole, and an exposed region located closer to the upright base than the holding hole opening;
The endoscope according to claim 6, comprising:
The seal member has elasticity, and the width of the first wall portion is longer than the width of the seal member mounting groove in the axial direction of the rotation shaft,
The endoscope according to claim 7, wherein the seal member is attached to the seal member attachment groove in a state where the first wall portion is compressed in the axial direction of the rotation shaft.
Between the first wall portion and the third wall portion of the seal member, an urging member or an elastic member that urges the other of the first wall portion and the third wall portion in a direction away from the other. The endoscope according to claim 7 or 8, wherein a member is provided.
The rotating shaft is divided into a first rotating shaft and a second rotating shaft in the axial direction of the rotating shaft, with the second groove wall surface of the seal member mounting groove on the upright stand rising lever side as a boundary,
The first rotating shaft is connected to the upright stand elevating lever at one end, and has the first connecting portion and the second groove wall surface at the other end,
The second rotating shaft has a second connecting part connected to the first connecting part at one end and the second connecting part connected to the first connecting part at one end, the groove bottom surface and the first groove wall surface. The endoscope according to any one of the above.
When the direction opposite to the first direction is the second direction, one end of the rotating shaft is at a position away from the holding hole opening on the upright base side of the holding hole in the second direction,
The partition has an opposing wall surface in which the holding hole opening is formed and facing the upright stand,
The seal member is disposed between the opposing wall surface and the upright table, and has an insertion hole through which the rotating shaft is inserted, a fourth wall portion that is in close contact with the opposing wall surface, and the rotating shaft of the upright table. The endoscope according to claim 1, further comprising a fifth wall portion that is in close contact with a side surface of the side.
An annular seal member mounting groove into which the seal member is fitted and an annular wall portion constituting the first groove wall surface on the upright base side of the seal member mounting groove are formed on the outer peripheral surface of the rotating shaft. And
The seal member mounting groove is formed on the outer peripheral surface of the rotating shaft at a position closer to the upright stand elevating lever than the holding hole opening on the upright base side of the holding hole.
The endoscope according to any one of claims 1 to 5, wherein the annular wall portion covers a part of a seal side surface of the seal member facing the first groove wall surface with the first groove wall surface.
The endoscope according to claim 12, wherein a cut portion is provided on a part of the outer peripheral surface of the annular wall portion.
The endoscope according to claim 12, wherein the diameter of the outer peripheral surface of the annular wall portion is smaller than the diameter of the outer peripheral surface of the seal member.
The endoscope according to any one of claims 1 to 14, further comprising a lid airtight holding member that maintains airtightness between the exposure window and the lid.