JP6859483B2 - Endoscope - Google Patents

Description

The present invention relates to an endoscope provided with a stand for guiding a treatment tool derived from a tip portion of an insertion portion.

As an ultrasonic endoscope, it is known that an electronic scanning type ultrasonic transducer is provided at the tip of the insertion part of the endoscope, and a treatment tool outlet is arranged at the base end side of the ultrasonic transducer at the tip. Has been done. In endoscopic examination using the ultrasonic endoscope, for example, while acquiring ultrasound image of the lesion by ultrasonic transducers, the puncture instrument derived into the body through the treatment instrument channel and the treatment instrument electrical outlet lesions The cells are collected by puncturing the part. Then, in order to treat a desired position in the body cavity of such a treatment tool, it is necessary to change the direction of derivation from the tip portion, and therefore, the treatment tool standing mechanism is provided at the tip portion.

As such a treatment tool standing mechanism, a mechanism including a standing table arranged in the standing table accommodating chamber, a rotating shaft, and a standing table standing lever is well known (see Patent Documents 1 to 6). ). The upright storage chamber is formed on one side surface side of the partition wall provided in the tip portion. The rotating shaft is rotatably supported in the holding hole (through hole) of the partition wall.

An upright stand is connected to one end of the rotating shaft, and an upright stand lever is connected to the other end. Therefore, a partition wall is arranged between the upright stand and the upright stand upright lever. A lever accommodating chamber for accommodating the upright stand upright lever is formed on the other side surface side of the partition wall. According to this treatment tool standing mechanism, the operation of the operating lever of the operation unit of the ultrasonic endoscope is transmitted to the standing stand standing lever via the operation wire to rotate the standing stand standing lever, thereby rotating the rotating shaft. By rotating, the stand can be displaced (rotated) around this rotation axis.

Further, in the treatment tool standing mechanism using the standing stand standing lever, for example, by arranging a sealing member such as an O-ring between the outer peripheral surface of the rotating shaft and the inner wall surface of the holding hole, as described above. It prevents blood, water, etc. from entering the lever storage chamber from the stand-up storage chamber.

By the way, in the ultrasonic endoscope, as described above, since the ultrasonic transducer is arranged on the tip side of the tip portion, the side-viewing endoscope (for example, the duodenum) disclosed in Patent Documents 3 to 6 is described above. It is not possible to have a removable cap structure at the tip like a mirror). Therefore, it is necessary to disassemble the tip portion when replacing the standing stand standing lever, the seal member, and the like.

Therefore, for example, in the ultrasonic endoscope described in Patent Document 1, a replacement (removal) opening for a standing stand standing lever, a seal member, etc. is provided on a part of the wall surface of the lever accommodating chamber, and this opening is made of metal. It is watertightly covered with a lid, and the metal lid is covered with a resin outer surface lid that forms a part of the outer peripheral surface of the tip portion. The metal lid is provided with a movement restricting surface that comes into contact with the rotating shaft and regulates the movement of the rotating shaft and the standing lever to the metal lid side.

Further, also in the ultrasonic endoscope described in Patent Document 2, as in Patent Document 1, a replacement opening for an upright stand upright lever, a seal member, etc. is provided on a part of the wall surface of the lever accommodating chamber. The opening is covered with a lid that forms part of the outer peripheral surface of the tip.

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

By the way, every time an ultrasonic endoscope is used for various examinations and treatments, it is necessary to perform a cleaning treatment using a cleaning liquid and a disinfecting liquid. At this time, since the tip portion provided with the treatment tool standing mechanism is miniaturized and its shape is complicated, it is possible to improve cleaning performance such as wraparound of cleaning liquid, insertability of cleaning brush, and draining property, and cleaning work. Ease is required. For example, if the side surface of the standing table on the partition wall side is in close contact with the partition wall, the cleaning liquid or the like may not wrap around this side surface, or the cleaning brush may not be applied. Therefore, it is preferable that a gap is formed between the side surface of the stand on the partition wall 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 according to the rotational operation of the stand. Therefore, as described in Patent Document 2, if the opening of the lever accommodating chamber is simply covered with a lid, the position of the seal member (airtight surface) may be displaced in the axial direction described above, or the seal member may be held. There is a risk of damage due to sliding contact with 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. In the figure, reference numeral 502 is the tip of the ultrasonic endoscope, reference numeral 504 is a partition wall, reference numeral 506 is a rotation axis, reference numeral 508 is an upright stand, and reference numeral 510 is an upright stand upright lever. 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 sealing member.

As shown by reference numeral 500A in FIG. 29, in the ultrasonic endoscope described in Patent Document 1, the opening of the lever accommodating 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 axis center 506A of the rotating shaft 506 and the rotating shaft 506 of the standing stand upright lever 510. As a result, the commutativity of the standing stand standing lever 510 and the seal member 520 and the like can be improved, and the positions of the standing stand standing lever 510 and the rotating shaft 506 can be regulated.

However, as shown by reference numeral 500B in FIG. 29, in order to improve the standing performance of the standing stand standing lever 510 in response to the standing operation of the operating lever (not shown), the length of the standing stand standing lever 510 is increased by the principle of leverage. It is necessary to lengthen the LQ [the length from the connecting portion with the operation wire (not shown) to the connecting portion with the rotating shaft 506 (axis center 506A)]. In this case, in order to achieve both an increase in the length LQ of the standing stand standing lever 510 and a reduction in the diameter of the tip portion 502, the position of the shaft center 506A of the rotating shaft 506 is on the lower side in the drawing in the cross section of the tip portion 502. Shift. Therefore, 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 regulate the positions of the standing stand standing lever and the rotating shaft, improve the standing performance of the standing stand standing lever, and reduce the diameter of the tip portion. The purpose is to provide a flexible endoscope.

The endoscope for achieving the object of the present invention is provided on the insertion portion having the tip and the proximal end and the proximal end side of the insertion portion, and is provided on the operation portion having the operation member and the distal end side of the insertion portion. The standing stand assembly, the rotating shaft rotatably supported by the standing stand assembly, the standing stand connected to one end of the rotating shaft and guiding the treatment tool derived from the standing stand assembly, and the lever main body. An upright stand 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. An exposure chamber provided in the standing table assembly that rotatably accommodates the standing table standing lever around the rotating shaft, exposing the side surface of the first lever on the side opposite to the rotating shaft side of the standing table standing lever. It has a lever accommodating chamber having a window, a base end side connecting portion connected to the operating member, and a tip side connecting portion connected to the lever tip portion of the standing stand standing lever, and the standing stand stands up by operating the operating member. An operation wire that rotates the rotating shaft via a lever to erect the erecting table, and a holding hole that is a part of the erecting table assembly and is provided between the lever accommodating chamber and the erecting table and supports the rotating shaft. A partition wall having a partition, an annular sealing 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, and a first lever. It is a first regulating portion provided on at least one of the side surface of the main body which is the side surface of the lever main body and the inner surface of the lid on the standing lever side of the lid, and the side surface of the main body and the lid. It is provided with a first regulating portion that regulates the displacement of the standing stand standing lever in the first direction on the lid side in the direction parallel to the axis of the rotation axis, which is interposed between the inner surface.

According to this endoscope, even when the length of the upright 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 tip of the insertion portion. Can be regulated.

In the endoscope according to another aspect of the present invention, the partition wall constitutes the bottom surface of the lever accommodating chamber on the upright stand side, and has the first accommodating chamber wall surface having the holding hole open, and the upright stand upright lever. It is a second regulating portion provided on at least one of the side surface of the second lever on the rotation shaft side and the wall surface of the first accommodation chamber, and is interposed between the side surface of the second lever and the wall surface of the first accommodation chamber. Then, a second regulating unit for regulating the displacement of the standing stand standing lever in the second direction opposite to the first direction is provided. As a result, the standing stand standing lever and the rotating shaft are prevented from being displaced in the axial direction of the rotating shaft.

In the endoscope according to another aspect of the present invention, the exposed window exposes the rotation range of the upright stand upright lever that rotates about the rotation axis in the lever accommodating chamber. As a result, the regulation by the first regulation unit can be executed at each rotation position of the standing stand standing lever.

In the endoscope according to another aspect of the present invention, when the first regulating portion is provided on the inner surface of the lid, the first regulating portion is at least the side surface of the main body portion of the standing stand standing lever that rotates about the rotation axis. It has a shape along a part of the rotation locus, and is interposed between the side surface of the main body and the inner surface of the lid at each rotation position of the standing stand standing lever. As a result, the regulation by the first regulation unit can be executed at each rotation position of the standing stand standing lever.

In the endoscope according to another aspect of the present invention, the partition wall has a second accommodating chamber wall surface forming a side surface of the lever accommodating chamber and a wire insertion hole through which the operation wire is inserted, and the wire. When the insertion hole is viewed from the tip side of the stand assembly, the center position of the wire insertion hole is shifted to the stand side from the lever tip. As a result, the displacement of the standing stand standing lever and the rotating shaft in the first direction can be more reliably regulated.

In the endoscope according to another aspect of the present invention, the sealing member is arranged 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 a holding hole on the upright stand side of the holding hole. It is exposed from the opening. This makes it possible to prevent liquids such as blood and water from entering between the outer peripheral surface of the rotating shaft and the inner wall surface of the holding hole.

In the endoscope according to another aspect of the present invention, on the outer peripheral surface of the rotating shaft, a seal member is provided on the outer peripheral surface of the rotating shaft from a position on the standing stand side of the holding hole opening to a position on the standing stand side of the holding hole opening. An annular seal member mounting groove is formed, and the seal member is in close contact with the first wall portion in close contact with the groove bottom surface of the seal member mounting groove and the first groove wall surface on the upright stand side of the seal member mounting groove. The second wall portion includes a close region close to the inner wall surface of the holding hole, and a third wall portion having an exposed region located on the upright stand side of the holding hole opening. As a result, the airtightness between the outer peripheral surface of the rotating shaft and the inner wall surface of the holding hole can be reliably maintained.

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 longer than the width of the seal member mounting groove in the axial direction of the rotation axis. The member is attached to the seal member mounting groove in a state where the first wall portion is compressed in the axial direction of the rotation axis. Thereby, the sealing function of the sealing member can be enhanced.

In the endoscope according to another aspect of the present invention, between the first wall portion and the third wall portion of the sealing member, the other is moved away from one of the first wall portion and the third wall portion. An urging member or an elastic member for urging is provided. Thereby, the sealing function of the sealing member can be enhanced.

In the endoscope according to another aspect of the present invention, the rotating shaft is rotated in the axial direction of the rotating shaft with the first rotating shaft and the second rotation with the second groove wall surface on the standing stand standing lever side of the sealing member mounting groove as a boundary. It is divided into a shaft, the first rotating shaft has an upright stand lever connected to one end, the other end has a first connecting portion and a second groove wall surface, and the second rotating shaft has an upright stand at one end. Has a second connecting portion connected to the first connecting portion, and a groove bottom surface and a first groove wall surface at the other end.

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 stand side of the holding hole. Located at positions separated in the direction, the partition wall has a holding hole opening and has a facing wall surface facing the standing table, the sealing member is arranged between the facing wall surface and the standing table, and the rotation axis is inserted. It has an insertion hole to be formed, a fourth wall portion in close contact with the facing wall surface, and a fifth wall portion in close contact with the side surface of the standing table on the rotation axis side. As a result, the airtightness between the outer peripheral surface of the rotating shaft and the inner wall surface of the holding hole can be reliably maintained.

In the endoscope according to another aspect of the present invention, an annular seal member mounting groove into which the seal member is externally fitted and a first groove wall surface on the upright stand side of the seal member mounting groove are formed on the outer peripheral surface of the rotating shaft. An annular wall portion is formed, and a seal member mounting groove is formed on the outer peripheral surface of the rotating shaft at a position on the standing hole standing lever side of the holding hole on the standing stand side, and the annular wall is formed. The portion covers a part of the seal side surface facing the first groove wall surface of the seal member with the first groove wall surface. As a result, the cleanability of the seal side surface of the seal member is improved, and the cleaning work can be facilitated.

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. As a result, the cleanability of the seal side surface of the seal member is improved, and the cleaning work can be facilitated.

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 sealing member. As a result, the cleanability of the seal side surface of the seal member is improved, and the cleaning work can be facilitated.

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

The endoscope of the present invention can realize the position regulation of the standing stand standing lever and the rotating shaft, the improvement of the standing performance of the standing stand standing lever, and the reduction of the diameter of the tip portion.

It is the schematic of the ultrasonic inspection system to which the endoscope of this invention was applied. It is the schematic which showed the conduit structure of an ultrasonic endoscope. It is an external perspective view of the tip part of the insertion part. It is a left side view when the tip part of the insertion part is seen from the tip side. It is a right side view when the tip part of the insertion part is seen from the tip side. It is an exploded perspective view of the tip part of the insertion part. It is an exploded perspective view of the stand assembly. It is a right side view of the stand assembly when the tip part is seen from the tip side. It is a front view of the stand assembly when the tip part is seen from the tip side. It is the schematic which showed an example of the standing table operation mechanism. It is explanatory drawing for demonstrating the rotation of the standing stand corresponding to the operation of the operation lever. It is the external perspective view of the stand. It is an external perspective view of the standing stand standing lever seen from the lever storage lid side. It is an external perspective view of the standing stand standing lever seen from the standing stand side. It is explanatory drawing for demonstrating the connection state of the standing stand rotation shaft and the standing lever rotation shaft. It is explanatory drawing for demonstrating the exposed window of the lever accommodating chamber and the lever accommodating lid. It is sectional drawing of the standing stand inserted through the holding hole, the standing stand standing lever, and the rotating shaft. It is an enlarged view of the lid inner surface of a lever storage lid. It is an enlarged view of the lever tip portion and the wire insertion hole in FIG. It is an enlarged view of the rotation shaft and a seal member in FIG. It is an enlarged view of the 1st wall part of a seal member. It is explanatory drawing for demonstrating the modification of the 1st regulation part and the 2nd regulation part. It is sectional drawing of the seal member of the modification 1. FIG. It is sectional drawing of the O-ring of the modification 2. It is an enlarged view of the O-ring in FIG. 24. It is sectional drawing of the annular wall part along the line 26-26 in FIG. It is sectional drawing of the modified example of an annular wall part. It is explanatory drawing of the 1st regulation part of another embodiment provided on the lid inner surface of a lever storage lid. It is explanatory drawing for demonstrating the problem of the ultrasonic endoscope described in Patent Document 1. FIG.

[Construction 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, the ultrasonic inspection system 2 includes an ultrasonic endoscope 10 that photographs the inside of a subject's body cavity (luminal cavity), an ultrasonic processor device 12 that generates an ultrasonic image, and an endoscope. An endoscope 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 an ultrasonic image and an endoscopic image. And.

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 portion 20 is inserted into various body cavities. The operation unit 22 is continuously provided on the base end side of the insertion unit 20 and accepts the operation of the operator.

One end of the universal cord 24 is connected to the operation unit 22. Further, on the other end side 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. A light source connector 30 connected to 16 is provided. A water supply tank 118 is connected to the light source connector 30 via a tube 32 for air supply and water supply, and a suction pump 124 is connected via a tube 34 for suction.

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

The light source device 16 is connected to an insertion unit 20, an operation unit 22, a 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 the observed portion 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, and is generated by the ultrasonic image generated by the ultrasonic processor device 12 and the endoscope processor device 14. Display the endoscopic image. As for the display of these ultrasonic images and endoscopic images, only one of them can be selectively displayed, or both can be displayed at the same time.

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

The insertion portion 20 has a tip end, a base end, and a longitudinal axis, and has a tip end portion 50, a curved portion 52, and a soft portion 54 in this order from the tip end side to the base end side. The tip portion 50 is formed of a hard member and is also referred to as a tip hard portion. An ultrasonic transducer 62, which will be described later, is provided on the tip portion 50, and a balloon 64 that covers the ultrasonic transducer 62 is detachably attached to the tip portion 50.

One end of the curved portion 52 is connected to the base end side of the tip portion 50, and the other end is connected to the tip end side of the soft portion 54. The curved portion 52 is configured to be bendable, and is remotely curved by rotating the pair of angle knobs 42 described above. As a result, the tip portion 50 can be oriented in a desired direction.

The flexible portion 54 has a small diameter, a long length, and flexibility, and connects the curved portion 52 and the operating portion 22.

FIG. 2 is a schematic view showing a conduit configuration of the ultrasonic endoscope 10. As shown in FIG. 2, inside the insertion unit 20 and the operation unit 22, a treatment tool channel 100, an air supply / water supply line 102, and a balloon line 104 having one end leading to the internal space of the balloon 64 are provided. ing.

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

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

One end of the balloon line 104 is connected to a supply / discharge port 70a (see FIG. 5) opened at a position inside the balloon 64 on the outer peripheral surface of the tip 50, and the other end is connected to the balloon water supply line 112. It is branched into a balloon drainage pipe 114. The balloon water supply line 112 is connected to the air supply water supply button 36, and the balloon drainage line 114 is connected to the suction button 38.

In addition to the air supply line 108, the water supply line 110, and the balloon water supply line 112, the air supply water supply button 36 includes one end of the air supply source line 116 leading to the air supply pump 129 and the water supply leading to the 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 level) of the water supply tank 118. Further, the other end of the water supply source pipeline 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 the air supply from the air supply pump 129 via the branch pipe line 122, the water in the water supply tank 118 is sent to the water supply source pipe line 120.

As the air supply / water supply button 36, a known two-stage switching type button is used. The air supply / water supply button 36 responds to the operator's operation by leaking air sent from the air supply source pipeline 116, ejecting air from the air supply water supply nozzle 92, and water from the air supply water supply nozzle 92. Switching between ejection and water supply into the balloon 64. Since the specific switching method is a known technique, description thereof will be omitted here (see, for example, International Publication No. 2015/151968).

In addition to the suction pipe line 106 and the balloon drainage pipe line 114, one end of the suction source line line 126 is connected to the suction button 38. A suction pump 124 is connected to the other end of the suction source pipeline 126. The suction pump 124 also operates at all times during ultrasonic observation. The suction button 38 is a two-stage switchable button like the air supply / water supply button 36.

The suction button 38 communicates the suction source pipeline 126 to the outside (atmosphere), sucks various suction objects from the treatment tool outlet 94 (see FIG. 3), and inside the balloon 64 according to the operation of the operator. Switch between draining water and draining water. Since the specific switching method is a known technique, description thereof will be omitted here (see, for example, International Publication No. 2015/151968).

Returning to FIG. 1, the operation lever 43 of the operation unit 22 is used for the operation of changing the out-out direction of the treatment tool derived from the treatment tool out-out port 94 (see FIG. 3), which will be described in detail later.

[Structure of the tip of the insertion part]
FIG. 3 is an external perspective view of the tip portion 50 of the insertion portion 20. FIG. 4 is a left side view of the tip portion 50 of the insertion portion 20 when viewed from the tip end side. FIG. 5 is a right side view of the tip portion 50 of the insertion portion 20 when viewed from the tip end side. FIG. 6 is an exploded perspective view of the tip portion 50 of the insertion portion 20. Note that the balloon 64 is not shown in FIGS. 3 and 6. Further, in FIG. 6, the light guide 128 and the endoscope observation unit 80 described later are not shown.

As shown in FIGS. 3 to 6, the tip portion 50 includes an ultrasonic observation unit 60 that acquires an ultrasonic detection signal from the tip end side to the base end side, and an endoscopic observation unit that acquires an imaging signal. A unit 80 is provided. Further, the tip portion 50 is provided with an upright stand 96 that changes the direction of drawing out the treatment tool between the ultrasonic observation unit 60 and the endoscopic observation unit 80. Further, the tip 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. As a result, each ultrasonic oscillator sequentially generates ultrasonic waves toward the observed portion, and receives the ultrasonic echo (echo signal) reflected at the observed portion. Then, each ultrasonic vibrator transmits an ultrasonic detection signal (electrical signal) corresponding to the received ultrasonic echo via a signal cable (not shown) inserted inside the insertion unit 20, the universal cord 24, and the like. Output to the ultrasonic processor device 12. As a result, an ultrasonic image is generated by the ultrasonic processor device 12.

The balloon 64 is attached to a housing member 72 of the tip 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 made of a stretchable elastic material such as latex rubber, and a stretchable locking ring 66 is provided at its open end. On the other hand, a locking groove 68 is provided between the ultrasonic observation unit 60 and the standing table 96 at the tip portion 50 over the entire circumference of the tip portion 50 in the circumferential direction. Then, by fitting the locking ring 66 into the locking groove 68, the balloon 64 is detachably attached to the tip portion 50.

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 tip portion 50. Then, when ultrasonic waves are generated from each ultrasonic transducer of the ultrasonic transducer 62 toward the observed portion, water (degassed water or the like) is supplied to the inside of the balloon 64 in response to the operation of the air supply / water supply button 36. By doing so, the balloon 64 is inflated until it abuts on the inner wall of the body cavity. Further, when the insertion portion 20 is pulled out of the body cavity, the water inside the balloon 64 is discharged in response to the operation of the suction button 38, so that the balloon 64 contracts in the same manner as when the insertion portion 20 is inserted into the body cavity. ..

The endoscope observation unit 80 is provided on the slope portion 86 of the housing member 72 of the tip portion 50. The slope portion 86 is provided at the tip end portion 50 at a position on the base end side of the treatment tool outlet 94 described later, and is formed obliquely with respect to the axial direction of the tip end portion 50. The endoscope observation unit 80 has an observation unit and an illumination unit.

The observation unit of the endoscope observation unit 80 has an observation window 88 (see FIG. 3). Behind the observation window 88, although not shown, an objective lens of the observation optical system and a CCD (Charge Coupled Device) type or 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 image sensor captures an observation image captured from the observation window 88. Then, the image pickup device outputs the image pickup signal of the observation image to the endoscope processor device 14 via a signal cable (not shown) inserted inside the insertion unit 20, the universal cord 24, and the like. 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 guide 128 described above are arranged behind each illumination window 90. There is. 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. It is illuminated in front of each from each illumination window 90.

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

The housing member 72 holds or houses each part of the ultrasonic observation unit 60 and the endoscopic observation unit 80 described above, and the upright stand 96 and the upright stand assembly 200 described later. The portion of the housing member 72 on the base end side of the ultrasonic observation portion 60 is divided into two in the vertical direction in the drawing with a plane parallel to the axial direction of the tip portion 50 as a boundary. That is, the housing member 72 has a structure in which the first housing member 72a located on the lower side in the drawing and the second housing member 72b located on the upper side in the drawing are connected. The upright stand 96 and the upright stand assembly 200 are housed between the first housing member 72a and the second housing member 72b.

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

Further, at the base end of the groove portion 74, a supply / discharge port 70a, which is an opening on the distal end side of the balloon conduit 104 shown in FIG. 2 described above, is opened. As a result, water can be supplied to the inside of the balloon 64 through the air supply / discharge port 70a, or water inside the balloon 64 can be discharged.

The second housing member 72b holds the endoscope observation unit 80 and has a slope portion 86. Further, on the upper surface of the second housing member 72b in the drawing, a treatment tool outlet 94 for leading the treatment tool is formed at a position closer to the tip side than the endoscope observation unit 80 (slope portion 86). When the first housing member 72a and the second housing member 72b are connected to each other, an upright stand accommodating chamber 94a, which is a space for accommodating the upright stand 96, is formed inside the treatment tool outlet 94.

When the tip portion 50 is viewed from the tip side thereof, both the first housing member 72a and the second housing member 72b form a partition wall 73 (FIG. 6) that constitutes the right side surface of the standing stand accommodating chamber 94a so as to straddle both of them. See) is formed. Further, the left side surfaces of both the first housing member 72a and the second housing member 72b, and the positions facing the lever accommodating chamber 212 (see FIG. 6) described later of the upright stand assembly 200, straddle both of them. A fitting hole 75 into which the lever storage lid 76 is fitted is formed in the housing.

The treatment tool channel 100 shown in FIG. 2 described above is connected to the standing table storage chamber 94a. Therefore, the treatment tool inserted into the treatment tool insertion port 44 is introduced into the body cavity from the treatment tool outlet 94 via the treatment tool channel 100 and the standing table accommodating chamber 94a.

The stand 96 is rotatably attached to the stand assembly 200 in the stand accommodating chamber 94a via a rotating shaft 216 (see FIG. 7) having a two-part structure described later. The standing table 96 changes the direction of the treatment tool guided into the standing table accommodating chamber 94a from the treatment tool channel 100, and leads the treatment tool out from the treatment tool outlet 94. Then, as will be described in detail later, the standing table 96 rotates in the standing table accommodating chamber 94a in response to the operation of the operating lever 43, so that the treatment tool lead-out direction introduced into the body cavity from the treatment tool lead-out port 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 tip portion 50. The lever storage lid 76 is detachably attached to the upright stand assembly 200 by a bolt 77 in a state of being fitted into the fitting hole 75 of the housing member 72. Further, the lid inner surface 244 (see FIG. 17) on the upright stand assembly 200 side of the lever storage lid 76 is provided with a lid seal member 76a and a first regulating portion 250 (see FIG. 17), which will be described in detail later. ing. Further, the lever storage lid 76 is formed with an insertion hole 76b into which the bolt 77 is inserted.

[Structure of stand assembly]
FIG. 7 is an exploded perspective view of the upright stand assembly 200, FIG. 8 is a right side view of the upright stand assembly 200 when the tip portion 50 is viewed from the tip side, and FIG. 9 is a front view of the tip portion 50 at the tip end. 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 the base 202 and the partition wall 204 extending toward the tip side from the base 202. And have. A part of the front end surface of the base 202 constitutes a side surface on the base end side of the upright stand accommodating chamber 94a. Further, a communication hole 202a is formed on the tip surface of the base 202 to communicate with the treatment tool channel 100 connected to the base end side thereof. As a result, the treatment tool channel 100 and the standing table accommodating chamber 94a are connected via the communication hole 202a.

The partition wall 204 includes a side wall surface 206 which is a left side surface when the stand-up assembly 200 is viewed from the tip side thereof, and a facing wall surface 208 which is a right side surface opposite to the side wall surface 206 and faces the stand-up stand 96. Has.

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

The partition wall 204 has a first accommodating chamber wall surface 212a forming the bottom surface of the lever accommodating chamber 212 on the upright stand 96 side and a second accommodating chamber wall surface 212b forming the side surface of the lever accommodating chamber 212 (see FIG. 7). ..

In the first storage chamber wall surface 212a, a holding hole 214 that penetrates the partition wall 204 along the axial direction of the rotation shaft 216, which will be described later, to connect the standing stand 96 and the standing stand standing lever 210, and communicates with the standing stand housing chamber 94a. Is formed. The holding hole 214 rotatably supports the rotating shaft 216. Since the standing stand standing lever 210 in the lever accommodating chamber 212 rotates (swings) around the rotating shaft 216, the lever accommodating chamber 212 is formed in a fan shape (fan shape) around the rotating shaft 216. There is.

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

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

Further, the bolt 77 described above is screwed in the peripheral region of the lever accommodating chamber 212 in the side wall surface 206, that is, the region different from the region where the lever accommodating chamber 212 is formed and covered by the lever accommodating lid 76. A matching bolt hole 220 is formed. The number of bolts 77 and 220 bolt holes is not particularly limited.

The facing wall surface 208 constitutes the left side surface of the stand-up stand accommodating chamber 94a when the stand-up stand assembly 200 is viewed from the tip end side thereof. A holding hole opening 214a (see FIG. 8), which is an opening of the holding hole 214 on the upright stand 96 side, is formed on the facing wall surface 208. Further, the facing wall surface 208 is formed with a notch portion 208a into which a part of the upright stand 96 enters. The notch portion 208a has a shape that does not hinder the rotation of the standing table 96 about the rotation shaft 216.

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

The operation wire 222 has a tip side connecting portion 222a (see FIG. 6) connected to the standing stand standing lever 210 in the lever accommodating chamber 212 on the tip side thereof. Further, the base end side of the operation wire 222 passes through the wire insertion hole 224 of the lever accommodating chamber 212 through the insertion portion 20 and is connected to the upright stand operation mechanism 226 (see FIG. 10) in the operation portion 22.

FIG. 10 is a schematic view showing an example of the standing table operating mechanism 226. As shown in FIG. 10, the operation wire 222 has a proximal end side connecting portion 222b connected to the upright stand operating mechanism 226 on the proximal end side thereof. The standing table 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 connected and capable of rotating within a certain angle range, and a crank member 226B connected to the rotating drum 226A. , And a slider 226C connected to the crank member 226B. The base end side connecting portion 222b is connected to the slider 226C.

When the operating lever 43 is operated to rotate the rotary drum 226A, the operating wire 222 is pushed and pulled through the crank member 226B and the slider 226C to swing the standing stand standing lever 210, and the standing stand standing lever 210 swings. The upright stand 96 rotates (swings) about the rotation shaft 216 in response to the swing of the 210.

FIG. 11 is an explanatory diagram for explaining the rotation of the standing table 96 in response to the operation of the operating lever 43. As shown by reference numeral XIA in FIG. 11, when the operating lever 43 is operated to rotate the rotary drum 226A in one direction, the operating wire 222 is pushed and the standing stand standing lever 210 is centered on the rotating shaft 216. The stand 96 rotates in the R1 direction and falls down. On the other hand, as shown by reference numeral XIB, when the operating lever 43 is operated to rotate the rotating drum 226A in the opposite direction, the operating wire 222 is pulled and the standing stand upright lever 210 moves in the R1 direction around the rotating shaft 216. Rotates in the opposite direction of R2, and the standing table 96 stands up. In this way, the operation wire 222 can displace (stand up and lie down) the upright stand 96 by rotating the rotating shaft 216 via the upright stand upright lever 210 by operating the operation lever 43.

FIG. 12 is an external perspective view of the standing table 96. As shown in FIG. 12, the standing table 96 has an arcuate guide surface 96a whose surface facing the communication hole 202a guides the treatment tool guided into the standing table accommodating chamber 94a toward the treatment tool outlet 94a. It becomes. Further, a standing base rotating shaft 216a, which 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 standing base 96. The method of connecting the standing table 96 and the standing table rotating shaft 216a is not particularly limited, and both may not be integrally formed and may be separate bodies.

The upright stand rotation shaft 216a is inserted into the holding hole 214 from the upright stand accommodating chamber 94a side. One end of the upright stand rotating shaft 216a is connected to the base end portion of the upright stand 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 230a has a shaft shape protruding toward the standing lever 210 side along the axial direction of the rotating shaft 216.

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

FIG. 13 is an external perspective view of the standing stand standing lever 210 as viewed from the lever storage lid 76 side. Further, FIG. 14 is an external perspective view of the standing stand standing lever 210 as viewed from the standing stand 96 side.

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

The lever base end portion 210b is provided on one end side of the lever main body portion 210a. An upright lever rotating shaft 216b that forms a part of the rotating shaft 216 and corresponds to the first rotating shaft of the present invention is connected to the lever base end portion 210b. The method of connecting the standing lever rotating shaft 216b and the lever base end portion 210b is not particularly limited, and 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 tip side connecting portion 222a of the operation wire 222 described above is connected to the wire connecting portion 235.

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

Further, the standing 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 other end surface of the standing lever rotating shaft 216b (opposing surface facing the standing base rotating shaft 216a), and is a fitting hole into which the above-mentioned connecting portion 230a fits. ..

Further, the standing lever rotating shaft 216b is formed with an insertion hole 236 through which the bolt 211 shown in FIG. 7 or the like described above is inserted. Furthermore, the end surface on the other end side of the standing lever rotating shaft 216b and the outer peripheral portion of the connecting portion 230b are used as a second groove wall surface 234c forming a part of the seal member mounting groove 234 (see FIG. 15) described later. Function.

FIG. 15 is an explanatory diagram for explaining the connected state of the standing table rotating shaft 216a and the standing lever rotating shaft 216b. As shown in FIGS. 12 to 15, the connecting portion 230a of the standing table rotating shaft 216a and the connecting portion 230b of the standing lever rotating shaft 216b are connected in the holding hole 214 shown in FIG. 7 or the like described above. At this time, the connecting portions 230a and 230b have a shape in which the standing table rotating shaft 216a and the standing lever rotating shaft 216b are connected to each other so as not to rotate relative to each other. The shapes of the connecting portions 230a and 230b are not limited to the shapes shown in the drawings, and may be changed as appropriate.

The bolt 211 is inserted into the insertion hole 236 from one end side of the standing 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 standing table rotating shaft 216a. As a result, the upright stand 96, the upright stand upright lever 210, and the rotating shaft 216 are integrated. As a result, the standing table 96 and the standing table standing lever 210 rotate (swing) integrally around the rotating shaft 216 (standing table rotating shaft 216a and standing lever rotating shaft 216b).

Further, by connecting the upright stand rotation shaft 216a and the upright lever rotation shaft 216b, the outer peripheral surface of the rotation shaft 216 has a first groove wall surface 234a, a groove bottom surface 234b, and a second groove wall surface along the circumferential direction. An annular seal member mounting groove 234 is formed by the 234c. In other words, the rotating shaft 216 is bounded by the second groove wall surface 234c on the DL side of the seal member mounting groove 234 in the first direction (see FIG. 17, corresponding to the standing lever side of the standing stand of the present invention). It has a structure divided into a standing lever rotating shaft 216b and a standing lever rotating shaft 216b. A seal member 256, which will be described later, is attached to the seal member mounting groove 234 (see FIG. 17).

[Construction of lever storage lid]
FIG. 16 is an explanatory view for explaining the exposed window 218 and the lever storage lid 76 of the lever storage chamber 212. As shown in FIG. 16, the upright stand upright lever 210 rotates (swings) about the rotation shaft 216 in the lever accommodating chamber 212. Therefore, the exposed window 218 has a shape that exposes the rotation range of the standing stand standing lever 210 that rotates about the rotating shaft 216. Therefore, the exposure window 218 can expose the first lever side surface 246 of the standing stand standing lever 210 at each rotation position of the standing stand standing lever 210.

The lever storage lid 76 fits into the fitting hole 75 of the housing member 72 and covers at least the exposed window 218 of the lever storage chamber 212. The lever storage lid 76 has an exposed window 218 (lever storage chamber 212) by screwing a bolt 77 into the bolt hole 220 of the upright stand assembly 200 through the insertion hole 76b or removing the bolt 77 from the bolt hole 220. Is detachably covered. Accordingly, the ultrasonic transducer 62 is hampered, even in the ultrasonic endoscope 10 can not be a detachable cap structure tip 50 so that the side-viewing endoscope (e.g. duodenoscope) The exposed window 218 (lever accommodating chamber 212) can be exposed by removing the lever accommodating lid 76 from the upright stand assembly 200. As a result, the upright stand upright lever 210 of the ultrasonic endoscope 10 and the seal member 256 (see FIG. 17) described later can be easily replaced or cleaned.

In the present embodiment, the lever storage lid 76 is attached to the upright stand assembly 200 (fitting hole 75 of the housing member 72) by 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 airtightness holding member of the present invention, and is made of an elastic material such as rubber. The lid seal member 76a is provided, for example, along the edge of the lid inner surface 244 (see FIG. 17) of the lever storage lid 76, and has a substantially frame shape. Then, when the lever storage lid 76 is attached to the upright stand assembly 200, the lid seal member 76a is pressed against the side wall surface 206 (peripheral portion of the exposed window 218) of the upright stand assembly 200. As a result, the airtightness between the lever storage lid 76 and the exposed window 218 (lever storage chamber 212) is maintained.

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

[Structure of 1st Regulatory Department and 2nd Regulatory Department]
FIG. 17 is a cross-sectional view of the upright stand 96, the upright stand upright lever 210, and the rotating shaft 216 inserted through the holding hole 214. Note that the operation wire 222 is not shown in FIG. Further, among the directions parallel to the axial direction of the rotating shaft 216 in the drawing, the direction from the standing table 96 toward the standing table standing lever 210 is defined as the 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 DL side in the first direction and the DR side in the second direction, and the inner wall surface of the upright stand accommodating chamber 94a facing each of these both sides (opposite wall surface 208 in FIG. 8 and the like). ), A gap is secured. As a result, it is possible to improve the cleaning property such as the wraparound of the cleaning liquid and the like described above, the insertability of the cleaning brush, and the draining property, and to facilitate the cleaning work. As described above, in the present embodiment, since a gap is secured between both side surfaces of the standing table 96 and the inner wall surface of the standing table accommodating chamber 94a, the standing table 96, the standing table standing lever 210, and the rotating shaft 216 ( Hereinafter, the displacement of the first direction DL and the displacement of the second direction DR of the standing stand standing lever 210 and the like are regulated.

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

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 regulating portion 250 is provided at a position within the lid inner surface 244 facing the main body portion side surface 246a of the lever main body portion 210a of the upright stand standing lever 210. ..

The first regulating portion 250 may be made of the same material as the lever storage lid 76, or may be made of a different material (elastic material, low friction material, etc.). The first regulating portion 250 has a shape protruding from the inner surface of the lid 244 in the second direction DR, for example, when viewed from the tip end side of the upright stand assembly 200 (see FIG. 17). Specifically, when the lever storage lid 76 is attached to the standing stand assembly 200, the first regulating portion 250 has a protrusion amount that is close to or comes into contact with the main body side surface 246a of the standing stand standing lever 210 in the lever storage chamber 212. It has been adjusted to.

Further, 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 regulation unit 250 has the above-mentioned R1 direction and R2 direction (see FIG. 11) centered on the rotation shaft 216. ), It has a shape along at least a part of the rotation locus of the side surface 246a of the main body of the standing lever 210. As a result, the first regulating portion 250 approaches or comes into contact with the side surface 246a of the main body of the standing stand standing lever 210 at each rotation position of the standing stand standing lever 210 that rotates about the rotating shaft 216.

In this way, the first regulating portion 250 is interposed between the side surface 246a of the main body and the inner surface of the lid 244 at each rotation position of the standing stand standing lever 210, so that the standing stand standing lever 210 or the like can be moved to the first direction DL. The displacement (displacement toward the lever storage lid 76 side) can be regulated.

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 accommodation chamber wall surface 212b is viewed from the tip side (front side of the tip side) of the upright stand assembly 200, the center position CH of the wire insertion hole 224 is shown in the drawing. The formation position of the wire insertion hole 224 in the wall surface 212b of the second accommodating chamber is adjusted so as to shift from the position of the lever tip 210c indicated by the straight line LT to the DR side in the second direction (the standing stand side of the present invention). ing.

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

Returning to FIG. 17, the second regulation unit 252 is provided at a position in the first accommodation chamber wall surface 212a of the lever accommodation chamber 212 so as to face the second lever side surface 248 of the standing stand standing lever 210 (lever main body portion 210a). Has been done. The second regulating portion 252 may be made of the same material as the partition wall 204, or may be made of a different material (elastic material, low friction material, etc.).

The second regulation unit 252 has a shape protruding from the wall surface 212a of the first accommodation chamber toward the DL in the first direction, for example, when viewed from the tip end side of the stand assembly 200. Specifically, the second regulation unit 252 is adjusted to have a protrusion amount that is close to or abuts on the upright stand upright lever 210 (lever main body portion 210a) in the lever accommodating chamber 212.

Further, although not shown, the second regulation unit 252 is a second lever side surface 248 of the standing stand standing lever 210 that rotates about the rotation shaft 216 when the first accommodation chamber wall surface 212a is viewed from the front side thereof. It has a shape along at least a part of the locus of. As a result, the second regulating portion 252 also approaches or comes into contact with the standing stand standing lever 210 (main body side surface 246a) at each rotation position of the standing stand standing lever 210 that rotates about the rotation shaft 216.

In this way, the second regulating unit 252 is interposed between the second lever side surface 248 and the first accommodating chamber wall surface 212a at each rotation position of the standing stand standing lever 210, so that the standing stand standing lever 210 or the like is in the second direction. Displacement to DR can be regulated.

[Structure of seal member]
FIG. 20 is an enlarged view of the rotating shaft 216 and the sealing 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 provided on the outer peripheral surface of the rotating shaft 216. It is formed. The seal member mounting groove 234 is first than the holding hole opening 214a of the holding hole 214 described above in a state where the standing stand standing lever 210 and the like are position-regulated by the first regulating portion 250 and the second regulating section 252. It is formed from the position on the direction DL side (standing stand standing lever side of the present invention) to the position on the second direction DR side (standing stand side of the present invention) with respect to 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 externally fitted in the seal member mounting groove 234.

The seal member 256 is inserted with the rotating shaft 216 and maintains airtightness between the outer peripheral surface of the rotating shaft 216 and the inner wall surface of the holding hole 214. The end of the seal member 256 on the DR side in the second direction is exposed (protruded) from the opening 214a of the holding hole 214 to the DR side in the second direction. Therefore, even when a liquid such as blood or water (hereinafter, simply abbreviated as liquid) invades the standing table storage chamber 94a, it is between the outer peripheral surface of the rotating shaft 216 and the inner wall surface of the holding hole 214. The invasion of the liquid can be prevented by the sealing member 256.

The seal member 256 has a so-called oil seal structure, includes a first wall portion 256a, a second wall portion 256b, a third wall portion 256c, and a compression spring 256d, and each of these portions 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 coefficient of friction.

Although not shown, the first wall portion 256a has a known lip portion (for example, a dust strip portion, a lip tip portion, and a seal lip portion), 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 known fitting portion, and is a close region U1 that is in close contact with the inner wall surface of the holding hole 214 and a second direction DR side (that is, an upright stand accommodating chamber 94a) of the holding hole opening 214a of the holding hole 214. It has an exposed area U2 located in (inside).

The compression spring 256d is provided between the first wall portion 256a and the third wall portion 256c. The compression spring 256d is an urging member that urges one of the first wall portion 256a and the third wall portion 256c in a direction away from the other. As a result, the first wall portion 256a can be pressed against the bottom surface of the groove 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 sealing 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. Reference numeral XXIA in FIG. 21 indicates a state before the connection between the standing table rotating shaft 216a and the standing lever rotating shaft 216b, and reference numeral XXIB in FIG. 21 indicates the connection between the standing table rotating shaft 216a and the standing lever rotating shaft 216b. Indicates the later state.

As shown by reference numeral XXIA in FIG. 21, the width W1 of the first wall portion 256a is formed longer than the width W2 of the groove bottom surface 234b of the seal member mounting groove 234 in the axial direction of the rotating shaft 216. Therefore, as shown by reference numeral XXIB in FIG. 21, after the standing table rotating shaft 216a and the standing lever rotating shaft 216b are connected, the first wall portion 256a of the seal member 256 is compressed in the axial direction of the rotating shaft 216. In this state, it is mounted in the seal member mounting groove 234. As a result, the elastic restoring force of the first wall portion 256a causes the second wall portion 256b of the seal member 256 to come into pressure contact with the first groove wall surface 234a of the seal member mounting groove 234. As a result, the sealing function of the sealing member 256 can be enhanced.

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

At the time of cleaning the seal member 256, a portion exposed in the upright stand accommodating chamber 94a of the second wall portion 256b and a cleaning liquid or the like such as the exposed region U2 of the third wall portion 256c can easily wrap around and the cleaning brush. It suffices to clean the part where the above can be easily applied, and the cleanability can be improved and the cleaning work can be facilitated.

[Effect of this embodiment]
As described above, in the ultrasonic endoscope 10 of the present embodiment, the first regulating portion 250 is levered so as to be interposed between the main body side surface 246a and the lid inner surface 244 at each rotation position of the standing stand standing lever 210. It is provided on the inner surface 244 of the storage lid 76. As a result, in order to improve the standing performance of the standing stand standing lever 210, even if the length is increased, the tip portion 50 does not have to be increased in diameter as shown in FIG. 29 described above. 1 The regulation unit 250 can regulate the displacement of the standing stand standing lever 210 or the like to the first direction DL. As a result, displacement regulation of the standing stand standing lever 210 or the like in the first direction DL, improvement of the standing performance of the standing stand standing lever 210, and reduction of the diameter of the tip portion 50 are realized.

Further, in the present embodiment, by providing the second regulating portion 252 on the wall surface 212a of the first accommodating chamber 212 of the lever accommodating chamber 212, the displacement of the standing stand standing lever 210 or the like in the second direction DR is also regulated. Therefore, in order to improve the cleanability in the standing table accommodating chamber 94a and facilitate the cleaning work, both sides of the erecting table 96 on the first direction DL side and the second direction DR side and the inside of the standing table accommodating chamber 94a. Even when a gap is secured between the wall surface and the wall surface, it is possible to prevent the standing stand standing 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 256 having a structure capable of being in close contact (pressure contact) between the first groove wall surface 234a and the groove bottom surface 234b of the seal member mounting groove 234 and the inner wall surface of the holding hole 214 is provided with the seal member mounting groove 234. Since it is attached to the rotating shaft 216, 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 maintained.

[Variation example of the 1st regulation part and the 2nd regulation part]
FIG. 22 is an explanatory diagram for explaining a modified example of the first regulation unit 250 and the second regulation unit 252. In the above embodiment, the first regulation unit 250 is provided on the inner surface surface 244 of the lever storage lid 76, and the second regulation unit 252 is provided on the wall surface 212a of the first storage chamber of the lever storage chamber 212.

On the other hand, as shown in FIG. 22, the first regulating portion 250 may be provided on the side surface 246a of the main body portion of the standing stand standing lever 210. In this case, the first regulating unit 250 is adjusted to a protruding amount that is close to or abuts on the inner surface of the lid 244. Therefore, the first regulating portion 250 is interposed between the main body portion side surface 246a and the lid inner surface 244 at each rotation position of the standing stand standing lever 210 that rotates about the rotating shaft 216, as in the above embodiment. Therefore, it is possible to regulate the displacement of the standing stand standing lever 210 or the like in the first direction DL.

Further, the second regulation unit 252 may be provided on the second lever side surface 248 of the standing stand standing lever 210. In this case, the second regulation unit 252 is adjusted to have a protrusion amount that is close to or abuts on the first accommodation chamber wall surface 212a of the lever accommodation chamber 212. Therefore, as in the above embodiment, the second regulating unit 252 sets the second lever side surface 248 and the first accommodating chamber wall surface 212a at each rotation position of the standing stand standing lever 210 that rotates about the rotating shaft 216. Since it is interposed between them, it is possible to regulate the displacement of the standing stand standing lever 210 or the like in the second direction DR.

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

Similarly, the second regulating portion 252 is divided into two in the axial direction of the rotating shaft 216, one of the two divided regulating portions 252 is provided on the first accommodating chamber wall surface 212a, and the other is provided on the second lever side surface 248. It may be provided. Then, at each rotation position of the standing stand standing lever 210, the standing stand standing lever 210 or the like is adjusted by adjusting the positions of both of the two divided second regulating portions 252 so that one and the other are close to each other or in contact with each other. The displacement to the second direction DR can be regulated.

[Modification example 1 of seal member]
FIG. 23 is a cross-sectional view of the seal member 260 of the modified example 1 which is different from the seal member 256 of the above embodiment. In the above embodiment, the seal member 256 is arranged between the outer peripheral surface of the rotating shaft 216 and the inner wall surface of the holding hole 214, but the annular seal member 260 is arranged between the partition wall 204 and the upright stand 96. You may.

As shown in FIG. 23, when the seal member 260 is arranged between the partition wall 204 and the upright 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 rotation). One end of the shaft 216a) on the DR side in the second direction is extended to a position away from the holding hole opening 214a of the holding hole 214 in the DR in the second direction. As a result, a space in which the seal member 260 can be placed is formed between the facing 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 rotating shaft 216 is inserted. The diameter of the insertion hole 262 is formed to be larger than the diameter of the rotating shaft 216. Further, the seal member 260 has a so-called oil seal structure, includes a fourth wall portion 260a, a fifth wall portion 260b, a sixth wall portion 260c, and a compression spring 260d, and each of these portions is formed in an annular shape. There is. The fourth wall portion 260a, the fifth wall portion 260b, and the sixth wall portion 260c are integrated.

The fourth wall portion 260a is one of a known lip portion and a fitting portion, and is in close contact with the facing wall surface 208 of the partition wall 204. The fifth wall portion 260b is the other of the known lip portion and the fitting portion, and is in close contact with the side surface of the upright stand 96 on the DL side in the first direction (the side surface on the side connected to the rotation shaft 216). The sixth wall portion 260c is a known back face and constitutes an outer peripheral surface of the sealing 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. As a result, the fourth wall portion 260a can be pressed against the facing wall surface 208, and the fifth wall portion 260b can be pressed against the side surface of the upright stand 96 on the DL side in the first direction. 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 seal member]
FIG. 24 is a cross-sectional view of the O-ring 270 of the second modification, which is different from the seal member 256 of the above embodiment. FIG. 25 is an enlarged view of the O-ring 270 in FIG. 24. 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 DR side in the second direction.

On the other hand, as shown in FIGS. 24 and 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 is larger 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 DL side in one direction.

In this case, on the outer peripheral surface of the rotating shaft 216, the seal member mounting groove 234 (first groove wall surface 234a, groove bottom surface 234b, and second groove wall surface 234c) is on the DL side in the first direction from the holding hole opening 214a (in the present invention). It is formed on the standing lever side). Then, on the outer peripheral surface of the rotating shaft 216 (standing base rotating shaft 216a), the first groove wall surface 234a on the second direction DR side (standing stand side of the present invention) of the seal member mounting groove 234 is provided along the circumferential direction thereof. An annular wall portion 272, which is an annular wall portion constituting the above, is formed.

The O-ring 270 corresponds to the seal member of the present invention, and is arranged between the outer peripheral surface of the rotating shaft 216 and the inner wall surface of the holding hole 214 by being attached to the seal member mounting groove 234. The O-ring 270 maintains the airtightness between the outer peripheral surface of the rotating shaft 216 and the inner wall surface of the holding hole 214.

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

Specifically, on the outer peripheral surface of the annular wall portion 272, a plurality of D cuts 272a (corresponding to the cut portion of the present invention) parallel to the axial direction of the rotating shaft 216 are formed at equal angular intervals with respect to the center of the rotating shaft 216. Has been done. As a result, 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, during the cleaning process of the ultrasonic endoscope 10, the cleaning brush can be applied to the O-ring 270 through the gap 274, or the cleaning liquid or the like can be circulated to the O-ring 270. As a result, the cleanability of the seal side surface 270a of the O-ring 270 is improved, and the cleaning work can be facilitated.

In FIG. 26, the annular wall portion 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 octagonal. Although eight D-cuts 272a are formed on the outer peripheral surface of the 272, the number of D-cuts 272a formed on the outer peripheral surface of the annular wall portion 272 may be 7 or less or 9 or more. Further, the cross-sectional shape of the outer peripheral surface of the annular wall portion 272 may be formed into an arbitrary polygonal shape (the number of D-cut 272a is 3 or more).

FIG. 27 is a cross-sectional view of a modified example of the annular wall portion 272 shown in FIG. 26. As shown in FIG. 27, instead of forming the D-cut 272a 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 formed to be smaller than the diameter of the rotation 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 circumference thereof. 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 cleanability of the seal side surface 270a of the O-ring 270 is improved and the cleaning work is easy. You can plan your sex.

If a 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 shape of the outer peripheral surface of the annular wall portion 272 may be formed in any shape.

[Other]
In each of the above embodiments, the seal members 256, 260 and the O-ring 270 have been described as examples of the seal members of the present invention, but the airtightness between the outer peripheral surface of the rotating shaft 216 and the inner wall surface of the holding hole 214 is ensured. If possible, the type, shape, arrangement position, and the like of the seal member are not particularly limited.

In the above embodiment, the rotating shaft 216 has a structure in which the rotating shaft 216 is divided into an upright base rotating shaft 216a and an upright lever rotating shaft 216b. For example, it is a non-divided structure as shown in FIG. 29 described above. You may.

In the above embodiment, the first regulating portion 250 is provided on the lid inner surface 244 of the lever storage lid 76 that forms a part of the outer peripheral surface of the tip portion 50, but the inside of the double lid as shown in FIG. 29 described above. The lid may be provided with the first regulation unit 250.

In the above embodiment, the ultrasonic endoscope 10 has been described as an example, but the present invention is also applied to an endoscope provided with a stand 96 for guiding a treatment tool, for example, a side-viewing endoscope such as a duodenum endoscope. can do.

[Additional Notes]
As can be seen from the description of the embodiments detailed above, the present specification includes disclosure of various technical ideas including the inventions shown below.

FIG. 28 is an explanatory view of the first regulation unit 254 of another embodiment provided on the lid inner surface 244 of the lever storage lid 76. As shown in FIG. 28, the first regulation unit 254 is provided at a position facing the rotation shaft 216 (standing lever rotation shaft 216b) on the lid inner surface 244 of the lever storage lid 76. When the lever storage lid 76 is attached to the standing stand assembly 200, the first regulating portion 254 is a protrusion that approaches or abuts the end of the rotating shaft 216 (standing lever rotating shaft 216b) on the DL side in the first direction. Adjusted to quantity. As a result, the first regulating unit 254 is interposed between the rotating shaft 216 and the lid inner surface 244 at each rotation position of the standing stand standing lever 210, so that the standing stand standing lever 210 or the like is the same as in the above embodiment. The displacement to the one-way DL can be regulated.

2 Ultrasonic inspection system 10 Ultrasonic endoscope 12 Ultrasonic processor device 14 Endoscope processor device 16 Light source device 18 Monitor 20 Insertion unit 22 Operation unit 24 Universal cord 27 Ultrasonic connector 28 Endoscope connector 30 Light source connector 32 Tube 34 Tube 36 Air supply Water supply button 38 Suction button 42 Angle knob 43 Operation lever 44 Treatment tool insertion port 50 Tip part 52 Curved part 54 Flexible part 60 Ultrasonic observation part 62 Ultrasonic transducer 64 Balloon 66 Locking ring 68 Locking groove 70a Supply / discharge port 72 Housing member 72a First housing member 72b Second housing member 73 Partition wall 74 Groove 75 Fitting hole 76 Lever storage lid 76a Lid seal member 76b Insertion hole 77 Bolt 77b Insertion hole 80 Endoscopic observation Part 86 Slope 88 Observation window 90 Illumination window 92 Air supply water supply nozzle 94 Treatment tool outlet 94a Standing table storage room 96 Standing table 96a Guide surface 100 Treatment tool channel 102 Air supply water supply line 104 Balloon line 106 Suction line 108 Air supply line 110 Water supply line 112 Balloon water supply line 114 Balloon drainage line 116 Air supply source line 118 Water supply tank 120 Water supply source line 122 Branch line 124 Suction pump 126 Suction source line 128 Light guide 129 Air supply pump 200 Standing stand assembly 202 Base 202a Communication hole 204 Partition 206 Side wall surface 208 Facing wall surface 208a Notch 210 Standing stand Standing lever 210a Lever body 210b Lever base end 210c Lever tip 211 Bolt 212 Lever storage room 212a First storage room Wall surface 212b Second storage chamber Wall surface 214 Holding hole 214a Holding hole opening 216 Rotating shaft 216a Standing stand Rotating shaft 216b Standing lever Rotating shaft 218 Exposed window 220 Bolt hole 222 Operation wire 222a Tip side connecting part 222b Base end side connecting part 224 Wire insertion Hole 226 Standing stand operation mechanism 226A Rotating drum 226B Crank member 226C Slider 230a Connecting part 230b Connecting part 232 Screw hole 234 Sealing member mounting groove 234a First groove wall surface 234b Groove bottom surface 234c Second groove wall surface 235 Wire connecting part 236 Insertion hole 244 Lid Inner surface 246 1st lever side surface 246a Main body side surface 248 2nd lever side surface 250 1st regulation part 252 2nd regulation part 254 1st regulation part 256 Seal part Material 256a 1st wall 256b 2nd wall 256c 3rd wall 256d Compression spring 260 Sealing member 260a 4th wall 260b 5th wall 260c 6th wall 260d Compression spring 262 Insertion hole 270 O-ring 270a Seal side surface 272 Circular wall 272a D cut 274 Gap 502 Tip 506 Rotating shaft 506A Axis center 510 Standing stand Standing lever 514 Lever accommodating chamber 516 Metal lid 518 Resin lid 520 Seal member CH Center position DL 1st direction DR 2nd direction U1 Close area U2 Exposed area

Claims (19)

An insertion part having a tip and a base,
An operation unit provided on the base end side of the insertion portion and having an operation member,
With the stand assembly provided on the tip side of the insertion part,
A rotating shaft that is rotatably supported by the stand assembly,
An upright stand connected to one end of the rotating shaft and guiding a treatment tool derived from the upright stand assembly.
A lever main body, a lever base end provided on one end side of the lever main body and connected to the other end of the rotating shaft, and a lever tip provided on the other end side of the lever main body. Standing stand with standing lever and
A lever accommodating chamber provided in the upright stand assembly for rotatably accommodating the upright stand upright lever around the rotation shaft, and a first lever of the upright stand upright lever on the side opposite to the rotation shaft side. A lever containment chamber with an exposed window that exposes the sides,
It has a base end side connecting portion connected to the operating member and a tip end side connecting portion connected to the lever tip portion of the standing stand standing lever, and is operated by the operating member via the standing stand standing lever. The operation wire that rotates the rotating shaft to erect the erection stand, and
A partition wall 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 pivotally supports the rotation axis.
An annular sealing 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, and a lid in which the inner surface of the lid on the standing lever side of the standing stand is arranged with a gap from the side surface of the first lever.
Among the first lever side surfaces, the first regulating portion is provided so as to project from at least one of the side surface of the main body portion, which is the side surface of the lever main body portion, and the inner surface of the lid toward the other surface. Further, it is interposed between the side surface of the main body and the inner surface of the lid to regulate the displacement of the standing stand standing lever in the first direction on the lid side in the direction parallel to the axis of the rotating shaft. 1 Regulatory Department and
Endoscope equipped with. The partition wall constitutes the bottom surface of the lever accommodating chamber on the upright stand side, and has a wall surface of the first accommodating chamber in which the holding hole is open.
A second regulating portion provided on at least one of the side surface of the second lever on the rotation axis side of the stand-up lever and the wall surface of the first accommodation chamber, and the side surface of the second lever and the first lever. (1) The endoscope according to claim 1, further comprising a second regulating unit that regulates the displacement of the standing stand standing lever in the second direction opposite to the first direction, which is interposed between the wall surface of the accommodation chamber. mirror. The endoscope according to claim 1, wherein the exposed window exposes the rotation range of the standing stand standing lever that rotates about the rotation axis in the lever accommodating chamber. When the first regulating portion is provided on the inner surface of the lid, the first regulating portion follows a rotation locus of at least a part of the side surface of the main body portion of the standing stand standing lever that rotates about the rotation axis. The endoscope according to any one of claims 1 to 3, which has a shape and is interposed between the side surface of the main body and the inner surface of the lid at each rotation position of the upright lever. The partition wall has a second accommodating chamber wall surface that constitutes a side surface of the lever accommodating chamber and is formed with a wire insertion hole through which the operation wire is inserted.
Any one of claims 1 to 4 in which the center position of the wire insertion hole is shifted toward the upright stand side from the lever tip portion when the wire insertion hole is viewed from the tip end side of the upright stand assembly. The endoscope according to item 1. A claim in which the sealing member is arranged 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 exposed from the holding hole opening on the upright stand side of the holding hole. Item 2. The endoscope according to any one of Items 1 to 5. On the outer peripheral surface of the rotating shaft, an annular seal to which the seal member fits outward from a position on the upright lever side of the holding hole opening to a position on the standing stand side of the holding hole opening. A member mounting groove is formed,
The seal member is
The first wall portion in close contact with the bottom surface of the seal member mounting groove and
A second wall portion of the seal member mounting groove that is in close contact with the wall surface of the first groove on the upright stand side,
A third wall portion having a close region close to the inner wall surface of the holding hole and an exposed region located on the upright stand side of the holding hole opening.
The endoscope according to claim 6. The seal member has elasticity, and the width of the first wall portion is formed longer than the width of the seal member mounting groove in the axial direction of the rotation axis.
The endoscope according to claim 7, wherein the seal member is attached to the seal member mounting groove in a state where the first wall portion is compressed in the axial direction of the rotation axis. Between the first wall portion and the third wall portion of the sealing member, an urging member or elasticity that urges one 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 the 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 wall surface of the second groove on the standing lever side of the sealing member mounting groove as a boundary.
The first rotating shaft has the standing stand standing lever connected to one end, and has the first connecting portion and the second groove wall surface at the other end.
Claims 7 to 9 of the second rotating shaft include a second connecting portion to which the upright stand is connected to one end and the first connecting portion to be connected to the other end, a 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 located at a position separated from the holding hole opening on the upright stand side of the holding hole in the second direction.
The partition wall has a facing wall surface on which the holding hole opening is formed and faces the upright stand.
The seal member is arranged between the facing wall surface and the standing table, and has an insertion hole through which the rotating shaft is inserted, a fourth wall portion in close contact with the facing wall surface, and the rotating shaft of the standing table. The endoscope according to any one of claims 1 to 5, further comprising a fifth wall portion in close contact with the side surface. An annular seal member mounting groove into which the seal member is externally fitted and an annular wall portion forming the first groove wall surface on the upright stand side of the seal member mounting groove are formed on the outer peripheral surface of the rotating shaft. Being done
The seal member mounting groove is formed on the outer peripheral surface of the rotating shaft at a position closer to the standing lever upright lever than the holding hole opening on the upright stand 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 the 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 sealing member. The endoscope according to any one of claims 1 to 14, further comprising a lid airtightness maintaining member for maintaining airtightness between the exposed window and the lid. An insertion part having a tip and a base,
An operation unit provided on the base end side of the insertion portion and having an operation member,
With the stand assembly provided on the tip side of the insertion part,
A rotating shaft that is rotatably supported by the stand assembly,
An upright stand connected to one end of the rotating shaft and guiding a treatment tool derived from the upright stand assembly.
A lever main body, a lever base end provided on one end side of the lever main body and connected to the other end of the rotating shaft, and a lever tip provided on the other end side of the lever main body. Standing stand with standing lever and
A lever accommodating chamber provided in the upright stand assembly for rotatably accommodating the upright stand upright lever around the rotation shaft, and a first lever of the upright stand upright lever on the side opposite to the rotation shaft side. A lever containment chamber with an exposed window that exposes the sides,
It has a base end side connecting portion connected to the operating member and a tip end side connecting portion connected to the lever tip portion of the standing stand standing lever, and is operated by the operating member via the standing stand standing lever. The operation wire that rotates the rotating shaft to erect the erection stand, and
A partition wall 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 pivotally supports the rotation axis.
An annular sealing 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 and
The side surface of the main body and the inner surface of the lid, which are the first regulating portions provided on the inner surface of the lid on the side of the upright lever of the lid and are the side surfaces of the lever main body in the side surface of the first lever. A first regulating unit that regulates the displacement of the standing stand standing lever in the first direction on the lid side in the direction parallel to the axis of the rotating shaft, intervening between them.
With
The first regulating portion has a shape along at least a part of the rotation locus of the side surface of the main body portion of the standing stand standing lever that rotates about the rotation axis, and at each rotation position of the standing stand standing lever. An endoscope interposed between the side surface of the main body and the inner surface of the lid. An insertion part having a tip and a base,
An operation unit provided on the base end side of the insertion portion and having an operation member,
With the stand assembly provided on the tip side of the insertion part,
A rotating shaft that is rotatably supported by the stand assembly,
An upright stand connected to one end of the rotating shaft and guiding a treatment tool derived from the upright stand assembly.
A lever main body, a lever base end provided on one end side of the lever main body and connected to the other end of the rotating shaft, and a lever tip provided on the other end side of the lever main body. Standing stand with standing lever and
A lever accommodating chamber provided in the upright stand assembly for rotatably accommodating the upright stand upright lever around the rotation shaft, and a first lever of the upright stand upright lever on the side opposite to the rotation shaft side. A lever containment chamber with an exposed window that exposes the sides,
It has a base end side connecting portion connected to the operating member and a tip end side connecting portion connected to the lever tip portion of the standing stand standing lever, and is operated by the operating member via the standing stand standing lever. The operation wire that rotates the rotating shaft to erect the erection stand, and
A partition wall 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 pivotally supports the rotation axis.
An annular sealing 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 and
A first regulating portion provided on at least one of the side surface of the main body portion, which is the side surface of the lever main body portion, and the inner surface of the lid on the side of the upright stand standing lever of the lid. A first that regulates the displacement of the upright stand upright lever in the first direction on the lid side in the direction parallel to the axis of the rotation axis, which is interposed between the side surface of the main body and the inner surface of the lid. Regulatory department and
With
The sealing member is arranged 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 exposed from the holding hole opening on the upright stand side of the holding hole. Endoscope. An insertion part having a tip and a base,
An operation unit provided on the base end side of the insertion portion and having an operation member,
With the stand assembly provided on the tip side of the insertion part,
A rotating shaft that is rotatably supported by the stand assembly,
An upright stand connected to one end of the rotating shaft and guiding a treatment tool derived from the upright stand assembly.
A lever main body, a lever base end provided on one end side of the lever main body and connected to the other end of the rotating shaft, and a lever tip provided on the other end side of the lever main body. Standing stand with standing lever and
A lever accommodating chamber provided in the upright stand assembly for rotatably accommodating the upright stand upright lever around the rotation shaft, and a first lever of the upright stand upright lever on the side opposite to the rotation shaft side. A lever containment chamber with an exposed window that exposes the sides,
It has a base end side connecting portion connected to the operating member and a tip end side connecting portion connected to the lever tip portion of the standing stand standing lever, and is operated by the operating member via the standing stand standing lever. The operation wire that rotates the rotating shaft to erect the erection stand, and
A partition wall 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 pivotally supports the rotation axis.
An annular sealing 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 and
A first regulating portion provided on at least one of the side surface of the main body portion, which is the side surface of the lever main body portion, and the inner surface of the lid on the side of the upright stand standing lever of the lid. A first that regulates the displacement of the upright stand upright lever in the first direction on the lid side in the direction parallel to the axis of the rotation axis, which is interposed between the side surface of the main body and the inner surface of the lid. Regulatory department and
With
When the direction opposite to the first direction is the second direction, one end of the rotating shaft is located at a position separated from the holding hole opening on the upright stand side of the holding hole in the second direction.
The partition wall has a facing wall surface on which the holding hole opening is formed and faces the upright stand.
The seal member is arranged between the facing wall surface and the standing table, and has an insertion hole through which the rotating shaft is inserted, a fourth wall portion in close contact with the facing wall surface, and the rotating shaft of the standing table. An endoscope having a fifth wall portion in close contact with the side surface. An insertion part having a tip and a base,
An operation unit provided on the base end side of the insertion portion and having an operation member,
With the stand assembly provided on the tip side of the insertion part,
A rotating shaft that is rotatably supported by the stand assembly,
An upright stand connected to one end of the rotating shaft and guiding a treatment tool derived from the upright stand assembly.
A lever main body, a lever base end provided on one end side of the lever main body and connected to the other end of the rotating shaft, and a lever tip provided on the other end side of the lever main body. Standing stand with standing lever and
A lever accommodating chamber provided in the upright stand assembly for rotatably accommodating the upright stand upright lever around the rotation shaft, and a first lever of the upright stand upright lever on the side opposite to the rotation shaft side. A lever containment chamber with an exposed window that exposes the sides,
It has a base end side connecting portion connected to the operating member and a tip end side connecting portion connected to the lever tip portion of the standing stand standing lever, and is operated by the operating member via the standing stand standing lever. The operation wire that rotates the rotating shaft to erect the erection stand, and
A partition wall 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 pivotally supports the rotation axis.
An annular sealing 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 and
A first regulating portion provided on at least one of the side surface of the main body portion, which is the side surface of the lever main body portion, and the inner surface of the lid on the side of the upright stand standing lever of the lid. A first that regulates the displacement of the upright stand upright lever in the first direction on the lid side in the direction parallel to the axis of the rotation axis, which is interposed between the side surface of the main body and the inner surface of the lid. Regulatory department and
With
An annular seal member mounting groove into which the seal member is externally fitted and an annular wall portion forming the first groove wall surface on the upright stand side of the seal member mounting groove are formed on the outer peripheral surface of the rotating shaft. Being done
The seal member mounting groove is formed on the outer peripheral surface of the rotating shaft at a position closer to the standing lever upright lever than the holding hole opening on the upright stand side of the holding hole.
The annular wall portion is an endoscope that covers a part of the seal side surface of the seal member facing the first groove wall surface with the first groove wall surface.

Images