阅读说明：本技术 内窥镜 (Endoscope with a detachable handle ) 是由 森本康彦 福泽常夫 于 2018-12-20 设计创作，主要内容包括：本发明提供一种能够提高立起台周边部的清洗性的内窥镜。所述内窥镜(1),其具备：插入部(12),设置有处置器具插通通道(82)；末端部主体(36)；立起台容纳部(62),设置于末端部主体(36)上,并且向第1方向开口；处置器具导出口(80),在立起台容纳部(62)的内部开口,且与处置器具插通通道(82)连通；及立起台(60),立起台(60)在位于立起位置的状态下,在与处置器具导出口(80)相对的对置区域的内侧具有第1面(64)及第2面(66),第1面(64)相对于处置器具插通通道(82)的轴线(82A)方向向立起台容纳部(62)的开口部(58)侧倾斜而设置,且第2面(66)相对于处置器具插通通道(82)的轴线(82A)方向向立起台容纳部(62)的与开口部(58)侧相反的一侧倾斜而设置。(The invention provides an endoscope capable of improving the cleaning performance of the peripheral part of a standing table. The endoscope (1) is provided with: an insertion section (12) provided with a treatment instrument insertion channel (82); a tip end body (36); a standing stand accommodating section (62) which is provided in the tip end section main body (36) and is open in the 1 st direction; a treatment instrument outlet (80) which is open inside the standing table housing (62) and communicates with a treatment instrument insertion channel (82); and an erecting table (60), wherein the erecting table (60) has a 1 st surface (64) and a 2 nd surface (66) on the inner side of an opposite region facing the treatment instrument outlet (80) in a state of being located at an erecting position, the 1 st surface (64) is provided to be inclined toward the opening (58) side of the erecting table accommodating section (62) with respect to the axis (82A) direction of the treatment instrument insertion path (82), and the 2 nd surface (66) is provided to be inclined toward the side opposite to the opening (58) side of the erecting table accommodating section (62) with respect to the axis (82A) direction of the treatment instrument insertion path (82).)

1. An endoscope, comprising:

an insertion section provided with a treatment instrument insertion channel;

a tip end body provided at a tip end of the insertion portion;

a standing stand accommodating portion provided in the tip end portion body and opened in a 1 st direction perpendicular to an axial direction of the tip end portion body;

a treatment instrument outlet port that is open in the interior of the upright table housing section and communicates with the treatment instrument insertion passage; and

a standing table disposed inside the standing table housing and rotatably disposed between a standing position and a lying position around a rotation axis,

the raising table has a 1 st surface and a 2 nd surface inside an opposing region facing the treatment instrument outlet port in a state where the raising table is located at the raising position,

the 1 st surface is provided to be inclined toward the opening side of the standing table housing portion with respect to the axial direction of the treatment instrument insertion path, and the 2 nd surface is provided to be inclined toward the opposite side of the opening side of the standing table housing portion with respect to the axial direction of the treatment instrument insertion path, as viewed from the rotational axis direction of the standing table.

2. The endoscope of claim 1,

the 1 st surface and the 2 nd surface are surfaces that constitute the rising table when projected onto a surface orthogonal to the axial direction of the treatment instrument insertion path with the rising table located at the rising position, the surfaces being disposed inside an area where the treatment instrument outlet port is formed.

3. The endoscope of claim 1 or 2,

the 2 nd surface is disposed outside the facing region in a state where the rising base is located at the falling position.

4. The endoscope of any one of claims 1 to 3,

when the standing table is in the collapsed position as viewed from the direction of the rotation axis of the standing table, the 2 nd surface is disposed on the distal end side in the axial direction of the distal end portion main body with respect to the rotation axis.

5. The endoscope of any one of claims 1 to 4,

the terminal body has a cleaning communication hole formed through a bottom wall portion of the standing platform accommodating portion on a side opposite to an opening side.

6. The endoscope of claim 5,

the tip end body has a countersink around the cleaning communication hole, and the countersink is recessed so that a syringe for supplying a cleaning liquid to the rising stand accommodating portion can be fitted.

7. The endoscope of any one of claims 1 to 6,

the terminal body has an observation window disposed on an opening side of the standing base housing section at a position in the 1 st direction when the terminal body is projected onto a plane orthogonal to an axial direction of the terminal body.

8. The endoscope of claim 7,

the observation window is disposed closer to a base end side in the axial direction of the distal end portion main body than the rising base accommodating portion.

9. The endoscope of claim 7 or 8,

the observation window is disposed offset from the rising stand accommodating portion in a 2 nd direction perpendicular to the 1 st direction.

10. The endoscope of any one of claims 1 to 9,

an ultrasonic transducer having a plurality of ultrasonic transducers is provided on the distal end side of the distal end body.

Technical Field

The present invention relates to an endoscope, and more particularly to an endoscope including a stand for standing a treatment instrument led out from an opening.

Background

Conventionally, the following endoscopes are known: in an endoscope, a distal end portion main body of an insertion portion to be inserted into a body cavity includes an erecting base and an erecting base accommodating portion, a treatment instrument guided out from a treatment instrument guide portion of the distal end portion main body is erected by inserting a treatment instrument insertion channel through the erecting base, and a guide-out direction of the treatment instrument can be adjusted by changing an erecting angle of the erecting base.

For example, patent document 1 below describes an endoscope including: the treatment instrument lead-out portion is provided with an upright stand to which an upright post is connected via a rotating shaft, and an operation wire that is pushed and pulled by an operation of an operation portion connected to a proximal end portion of the insertion portion is connected to the upright post.

Prior art documents

Patent document

Patent document 1: japanese patent laid-open publication No. 2005-287593

Disclosure of Invention

Technical problem to be solved by the invention

The endoscope inserted into the body cavity of the subject needs to be cleaned each time. In a duodenoscope having a standing table, a tip cap is detachably attached for easy cleaning, and the periphery of the standing table is ensured to be cleaned by detaching the tip cap. However, in a case where an ultrasonic transducer is provided on the distal end side as in an ultrasonic endoscope or the like and a liquid-tight structure of the ultrasonic transducer is required, a detachable distal end cap cannot be used in some cases. In such a case, the periphery of the standing table can be cleaned only by using a cleaning tool such as a brush or a syringe from the opening of the standing table housing portion, and it is required to improve the cleaning performance of the back surface of the standing table.

When the medical solution is injected from the operation unit side and the medical solution is discharged from the treatment instrument guide port at the distal end portion to the raising table housing portion during cleaning of the endoscope, the medical solution contacting the raising table directly leaks from the opening portion to the outside of the endoscope when the raising table is present on the front side of the treatment instrument guide port (the discharge side of the medical solution).

The present invention has been made in view of such circumstances, and an object thereof is to provide an endoscope capable of improving the cleaning performance of the endoscope, particularly the cleaning performance of the raising mechanism.

Means for solving the technical problem

In order to achieve the object of the present invention, an endoscope according to the present invention includes: an insertion section provided with a treatment instrument insertion channel; a tip end body provided at the tip end of the insertion portion; a standing stand accommodating portion provided in the tip end portion main body and opened in a 1 st direction perpendicular to an axial direction of the tip end portion main body; a treatment instrument outlet opening which is opened in the interior of the upright table housing section and communicates with the treatment instrument insertion passage; and an upright base disposed inside the upright base housing portion and rotatably provided between an upright position and a lying position about a rotation axis, wherein the upright base has a 1 st surface and a 2 nd surface inside an opposing region opposing the treatment instrument lead-out port in a state where the upright base is located at the upright position, the 1 st surface is provided inclined toward an opening side of the upright base housing portion with respect to an axial direction of the treatment instrument insertion passage, and the 2 nd surface is provided inclined toward an opposite side of the upright base housing portion with respect to the axial direction of the treatment instrument insertion passage, when viewed from the rotation axis direction of the upright base.

In one aspect of the present invention, it is preferable that the 1 st surface and the 2 nd surface are surfaces arranged inside an area where the treatment instrument outlet port is formed, of surfaces constituting the rising table when the rising table is projected onto a surface orthogonal to the axial direction of the treatment instrument insertion passage in a state where the rising table is located at the rising position.

In one aspect of the present invention, it is preferable that the 2 nd surface is disposed outside the facing region in a state where the rising base is located at the falling position.

In one aspect of the present invention, it is preferable that the 2 nd surface is disposed on the distal end side in the axial direction of the distal end portion main body with respect to the rotation shaft when the raising base is in the collapsed position as viewed from the rotation shaft direction of the raising base.

In one aspect of the present invention, the terminal portion main body preferably includes a cleaning communication hole formed through a bottom wall portion of the standing platform accommodating portion on a side opposite to the opening side.

In one aspect of the present invention, the tip end body preferably has a spot facing portion around the cleaning communication hole, and the spot facing portion is recessed so that a syringe for supplying a cleaning liquid to the raised table housing portion can be fitted therein.

In one aspect of the present invention, it is preferable that the tip end body has an observation window disposed on an opening side of the standing base accommodating portion at a position in the 1 st direction when the tip end body is projected onto a plane orthogonal to the axial direction of the tip end body.

In one aspect of the present invention, the observation window is preferably disposed closer to the base end side in the axial direction of the distal end portion main body than the standing base accommodating portion.

In one aspect of the present invention, the observation window is preferably disposed offset from the rising stand accommodating portion in the 2 nd direction perpendicular to the 1 st direction.

In one aspect of the present invention, it is preferable that the distal end side of the distal end portion main body is provided with an ultrasonic transducer having a plurality of ultrasonic transducers.

Effects of the invention

According to the endoscope of the present invention, the rising stand can guide the cleaning liquid discharged from the treatment instrument outlet port to flow toward the opening side of the rising stand accommodating portion and the rotation shaft side of the rising stand, and therefore the rising mechanism (rotation shaft) can be reliably cleaned.

Drawings

Fig. 1 is an overall view of an ultrasonic endoscope of the present invention.

Fig. 2 is a perspective view showing an external appearance of the distal end portion of the insertion portion.

Fig. 3 is a plan view (top view) showing an appearance of the distal end portion of the insertion portion.

Fig. 4 is a side sectional view of the distal end portion of the insertion portion.

Fig. 5 is a sectional view taken along line 5-5 in fig. 3.

Fig. 6 is a side sectional view of the distal end portion of the raising table in a state where the raising table is located at the raising position.

Fig. 7 is a side sectional view of the standing table in the laid-down position.

Fig. 8 is a diagram illustrating a positional relationship between the treatment tool outlet and the rising base.

Fig. 9 is a bottom view of the distal end portion of the insertion portion.

Detailed Description

Hereinafter, an endoscope according to the present invention will be described with reference to the drawings.

(endoscope)

Fig. 1 is an overall view of an endoscope 1 to which the present invention is applied. In addition, the following embodiments are described taking an ultrasonic endoscope as an example, but the present invention can also be applied to endoscopes other than the ultrasonic endoscope. That is, the present invention can be applied to any endoscope having a stand and a stand mechanism.

The endoscope 1 in the figure is composed of an operation section 10 which is gripped by a surgeon and performs various operations, an insertion section 12 which is inserted into a body cavity of a patient, and a universal cord 14. The endoscope 1 is connected to system configuration devices such as a processor device and a light source device, not shown, constituting an endoscope system via a universal cord 14.

The operation unit 10 is provided with various operation members operated by the operator, for example, a corner button 16, an upright operation lever 18, an air/water supply button 20, a suction button 22, and the like, which function as will be described later.

The operation unit 10 is provided with a treatment instrument introduction port 24, and the treatment instrument introduction port 24 inserts a treatment instrument into the treatment instrument insertion passage in the insertion portion 12.

The insertion portion 12 extends from the distal end of the operation portion 10, and is formed to have a small diameter and a long shape as a whole.

The insertion portion 12 is composed of a soft portion 30, a bent portion 32, and a distal end portion 34 in this order from the proximal end side toward the distal end side.

The soft portion 30 occupies most of the proximal end side of the insertion portion 12, and has flexibility to bend in any direction. When the insertion section 12 is inserted into the body cavity, the flexible section 30 is bent along the insertion path into the body cavity.

The bending portion 32 is provided to be capable of bending in the vertical direction and the lateral direction by the rotational operation of the corner key 16 of the operation portion 10, and the distal end portion 34 can be oriented in a desired direction by the bending portion 32.

As will be described in detail later with reference to fig. 2 to 4, the distal end portion 34 includes an ultrasonic transducer 50 having a plurality of ultrasonic transducers, and a distal end portion main body 36 connected to the proximal end side of the ultrasonic transducer 50. The tip end body 36 is provided with an upright stand accommodating portion 62, and the upright stand accommodating portion 62 has an opening portion 58 that opens in the 1 st direction perpendicular to the direction of the axis 38 of the tip end body 36. The distal end portion main body 36 is provided with a treatment instrument outlet 80 that opens into the interior of the standing base housing portion 62 and through which a treatment instrument is led out. Further, an upright stand 60 that changes the direction of the treatment instrument led out from the treatment instrument lead-out port 80 is provided inside the upright stand accommodating portion 62. The axis 38 of the distal end portion body 36 is a line that coincides with or is parallel to the longitudinal axis of the insertion portion 12 in fig. 1.

The universal cord 14 shown in fig. 1 contains cables, light conductors and fluid hoses inside. The universal cord 14 includes a connector at an end portion thereof, not shown, and is connected to a predetermined system configuration device constituting the endoscope system, such as a processor device and a light source device, so that electric power, a control signal, illumination light, liquid, gas, and the like necessary for operating the endoscope 1 are supplied from the system configuration device to the endoscope 1, and data of an observation image acquired by the imaging unit and data of an ultrasonic image acquired by the ultrasonic transducer are transmitted from the endoscope 1 to the system configuration device. The observation image and the ultrasonic image transmitted to the system configuration device are displayed on a monitor, and the operator and the like can observe the images.

(Structure of tip portion)

Next, the structure of the distal end portion 34 of the insertion portion 12 will be described. Fig. 2 is a perspective view showing an appearance of the distal end portion 34 of the insertion portion. Fig. 3 is a top view (top view). Fig. 4 is a side sectional view.

The tip 34 has a tip body 36 forming a partition wall between the outer wall and the inside thereof, and each component disposed on the tip body 36 is accommodated and held in an accommodation portion provided in the tip body 36.

Although details are omitted, the tip end portion main body 36 is partially detachable as a separate block, and each component can be assembled to a predetermined housing portion with the separate block detached. After the respective constituent elements are assembled to the accommodating portion, the respective constituent elements are accommodated and held in the accommodating portion and fixed to the distal end portion 34 by attaching the separate block to the distal end portion main body 36.

The terminal body 36 is made of an insulating material having insulating properties, for example, a resin material such as a plastic such as a methacrylic resin or a polycarbonate.

As shown in fig. 2 to 4, the distal end portion 34 is composed of a base portion 40 constituting the distal end portion main body 36 and an extension portion 42 extending from the base portion 40 toward the distal end side and holding the ultrasonic transducer 50.

That is, a convex ultrasonic transducer 50 is disposed in the extension portion 42, and the convex ultrasonic transducer 50 has an ultrasonic transmitting/receiving surface 52, and the ultrasonic transmitting/receiving surface 52 is formed by arranging ultrasonic transducers for transmitting/receiving ultrasonic waves in a curved shape along the direction of the axis 38 of the distal end portion body 36. Data for generating an ultrasonic image of the in-vivo tissue is acquired by the ultrasonic transducer 50.

As shown in fig. 2 and 3, the distal end portion body 36 is provided with an observation window 44, illumination windows 46L and 46R, an air/water feeding nozzle 48, an opening portion 58 through which a treatment instrument is led, and a standing wall portion 68 provided around the opening portion 58.

An opening 58 is provided in the base 40 of the distal end portion body 36, and the treatment instrument is guided out of the opening 58 to the scanning range of the ultrasonic wave of the ultrasonic transducer 50. The opening 58 is formed to open in the 1 st direction orthogonal to the axis 38 direction of the tip end body 36 toward the rising base accommodating portion 62 provided in the tip end body 36. Further, as shown in fig. 2, a part of the opening portion 58 may be formed obliquely downward toward the distal end side, and the entire opening portion 58 may be formed obliquely. In the present specification, as shown by an arrow a in fig. 4, the "1 st direction" refers to a direction perpendicular to the direction of the axis 38 of the tip end portion main body 36 and in which the opening portion 58 of the stand accommodating portion 62 is formed. As shown in fig. 2, the "2 nd direction" is a direction indicated by an arrow B perpendicular to the direction of the axis 38 of the tip end portion body 36 and the 1 st direction indicated by an arrow a. The "1 st direction side" refers to a side where the opening 58 is open. In the present specification, one side in the 1 st direction is sometimes referred to as "upper" and "upper", and the other side in the 1 st direction is sometimes referred to as "lower" and "lower".

As shown in fig. 4, a treatment instrument outlet 80 that opens into the interior of the standing table housing portion 62 is disposed on the proximal end side of the standing table housing portion 62. The treatment instrument outlet port 80 communicates with the treatment instrument inlet port 24 (see fig. 1) of the operation unit 10 via a treatment instrument insertion passage 82 inserted through the insertion portion 12. Thus, when the endoscope is inserted into the body cavity to perform treatment or observation, the treatment instrument inserted from the treatment instrument introduction port 24 is guided out from the treatment instrument introduction port 80 (see fig. 4) to the standing table housing section 62. When cleaning the endoscope, a cleaning liquid is injected from the treatment instrument introduction port 24, and the cleaning liquid is discharged from the treatment instrument introduction port 80 into the standing table housing portion 62 through the treatment instrument insertion passage 82.

The raising table 60 is disposed in front of the treatment instrument outlet 80 of the raising table housing 62. The raising table 60 is provided rotatably about a rotation shaft 92 between a raising position and a falling position. The standing stand 60 is formed of a metal material such as stainless steel, and has a concave guide surface 60a which is curved upward from the base end side toward the distal end side of the distal end portion main body 36 on the upper surface side. The treatment instrument led out from the treatment instrument lead-out port 80 is led out to the outside from the opening 58 on the upper side of the standing table housing portion 62 along the guide surface 60a in the direction of the axis 38 of the distal end portion main body 36 (for example, the longitudinal axis direction of the insertion portion 12).

The raising table 60 is rotated about the rotation shaft 92 by the operation of the raising operation lever 18 shown in fig. 1, and performs a raising operation. By adjusting the rising angle from the collapsed state by the rising operation of the rising base 60, the lead-out direction (lead-out angle) of the treatment instrument led out from the opening 58 can be changed.

The treatment instrument insertion path 82 shown in fig. 4 is also connected to a suction path not shown, and body fluid or the like can be sucked from the opening 58 by operating the suction button 22 shown in fig. 1.

The observation window 44 is disposed on the observation member forming surface 72 provided on the base end side of the standing stand accommodating portion 62. An imaging system unit in which an imaging optical system constituting an imaging section and a solid-state imaging element are integrally assembled is housed in the observation window 44. Thus, when light from a treatment portion that is a field of view of the imaging portion is taken in from the observation window 44, the light is imaged as an observation image on the solid-state imaging element via the imaging optical system. That is, the treatment unit is imaged by the solid-state imaging element.

The observation member forming surface 72 on which the observation window 44 is arranged is formed of a surface having a normal component toward the distal end side in the direction of the axis 38 of the distal end portion main body 36. That is, the observation member forming surface 72 is formed as an inclined surface inclined upward toward the base end side of the distal end portion 34. By providing the observation member forming surface 72 with a surface having a normal component directed toward the distal end side and providing the observation window 44 on the observation member forming surface 72, the position from which the treatment instrument is guided out from the opening 58 can be brought into the visual field range of the observation window 44 through the observation window 44. Therefore, the treatment instrument from the opening 58 to the target treatment position can be confirmed by the observation window 44. The observation member forming surface 72 may be a vertical surface perpendicular to the direction of the axis 38 of the distal end portion body 36.

The illumination windows 46L, 46R are provided on both sides of the observation member formation surface 72 with the observation window 44 interposed therebetween. Inside the illumination windows 46L, 46R, light emitting portions constituting illumination portions are housed. Illumination light transmitted from a light source device connected to the universal cord 14 through a photoconductor is emitted from the light emitting portion, and the illumination light is applied to a treatment portion of the visual field range of the imaging portion through the illumination windows 46L and 46R.

The air/water feeding nozzle 48 is provided on the observation member forming surface 72. Then, by operating the air/water supply button 20 in fig. 1, a cleaning liquid, water, air, or the like (hereinafter, also referred to as "cleaning liquid or the like") is sprayed from the air/water supply nozzle 48 in fig. 2 toward the observation window 44, and the observation window 44 is cleaned or the like.

As shown in fig. 4, the distal end portion main body 36 includes a cleaning communication hole 84 that communicates the standing table accommodating portion 62 with the outside, in a bottom wall portion 78 on the side opposite to the side where the opening portion 58 of the standing table accommodating portion 62 is disposed. Since the cleaning communication hole 84 is provided, a cleaning tool such as a brush or a syringe can be inserted into the standing table housing 62 through the cleaning communication hole 84, and thus the back surface side and the peripheral portion of the standing table 60 can be cleaned easily.

Fig. 5 is a cross-sectional view of tip body 36 taken along line 5-5 of fig. 3. In the terminal portion body 36, signal cables 86 inserted through cable insertion holes 89 are arranged, these signal cables 86 are cables for connecting the ultrasonic transducer (not shown) of the ultrasonic transducer 50 shown in fig. 2 to the system configuration device, and these signal cables 86 are arranged from the insertion portion 12 of fig. 1 to the universal cord 14. As shown in fig. 5, when the cable insertion hole 89 and the raising table housing portion 62 are projected on the virtual plane 87 perpendicular to the 1 st direction indicated by the arrow a, the cable insertion hole 89 is disposed in a region 89A different from the region 62A of the raising table housing portion 62. That is, as shown in fig. 5, the cable insertion holes 89 and the rising base accommodating portions 62 are arranged in the 2 nd direction when viewed from the front. The cable insertion hole 89 is disposed on one side of the standing stand accommodating portion 62 in the 2 nd direction (on the right side of the standing stand accommodating portion 62 in fig. 5). At this time, the standing stand accommodating portion 62 is disposed offset from the center position C of the terminal portion body 36 toward the other side in the 2 nd direction (leftward and lateral from the center position C in fig. 5).

In this way, by arranging the cable insertion holes 89 in the 2 nd direction of the standing stand accommodating portion 62, the standing stand accommodating portion 62 can be arranged below in the terminal section main body 36. By being arranged below, the distance from the cleaning communication hole 84 to the rising base 60 can be shortened, and the back surface side and the peripheral portion of the rising base 60 can be cleaned easily.

Next, the positional relationship of the opening 58, the standing stand accommodating portion 62, and the observation window 44 will be described. In the present embodiment, as shown in fig. 5, the positional relationship of the respective components constituting the tip end body 36 can be set as follows by disposing the rising base accommodating portion 62 at the lower side in the tip end body 36.

As shown in fig. 4, when the position of the opening 58 is set as a reference position, the position of the observation window 44 in the 1 st direction (vertical direction in fig. 4) indicated by an arrow a is arranged at a position opposite to the standing stand accommodating portion 62. That is, when the distal end portion main body 36 is projected on a virtual surface orthogonal to the axis 38 direction, the observation window 44 is disposed on the opening side (opening portion 58 side) of the standing stand accommodating portion 62. By positioning the observation window 44 above the opening 58 in this manner, the treatment instrument can be brought into the observation field of view of the observation window 44 at the position where the treatment instrument is led out from the opening 58. Therefore, the treatment instrument can be guided to the target position, and the sighting can be improved.

As shown in fig. 3, the observation window 44 and the standing stand accommodating portion 62 are preferably arranged so that the observation window 44 is shifted from the standing stand accommodating portion 62 in the 2 nd direction indicated by an arrow B. Here, the observation window 44 is disposed offset in the 2 nd direction from the standing stand accommodating portion 62 means that, for example, as shown in fig. 3, the center line 44A of the observation window 44 is offset in the 2 nd direction indicated by an arrow B with respect to the center line 60A of the standing stand 60 in a plan view. With such a configuration, even when the raising table 60 is raised and the treatment instrument is led out from the opening 58, the observation field of view of the observation window 44 can be prevented from being blocked by the treatment instrument and the raising table 60, and the treatment position can be reliably confirmed by the observation window 44.

Fig. 6 is a cross-sectional view of a side surface of the endoscope with the raising table in the raising position. Fig. 7 is a cross-sectional view of a side surface of the rising base in a state where the rising base is positioned at the falling position.

In the present embodiment, the cleaning solution discharged from the treatment instrument lead-out port 80 is configured to flow not only toward the opening side (the opening portion 58 side) but also toward the rotation shaft 92 side, and includes two surfaces, i.e., the 1 st surface 64 and the 2 nd surface 66, which face in different directions from each other. When the standing table 60 is in the standing position, the 1 st surface 64 and the 2 nd surface 66 are provided inside the facing region facing the treatment instrument outlet 80. That is, as shown in fig. 6, when the 1 st surface 64 and the 2 nd surface 66 project the raising table 60 and the treatment instrument lead-out port 80 located at the raising positions on the virtual surface 83 orthogonal to the direction of the axis 82A of the treatment instrument insertion passage 82, at least a part of the region 64A of the 1 st surface 64 and at least a part of the region 66A of the 2 nd surface 66 are arranged inside the region 80A of the treatment instrument lead-out port. By disposing the 1 st surface 64 and the 2 nd surface 66 in this manner, when the rising base 60 located at the rising position is viewed from the treatment instrument lead-out opening 80, both the 1 st surface 64 and the 2 nd surface 66 are disposed at positions viewed from the treatment instrument lead-out opening 80. When the standing table 60 is in the standing position, the 1 st surface 64 and the 2 nd surface 66 are provided inside the facing region facing the treatment instrument outlet 80, and thus the cleaning liquid discharged from the treatment instrument outlet 80 can be brought into contact with the 1 st surface 64 and the 2 nd surface 66.

When the raising table 60 is viewed from the rotation axis direction, the 1 st surface 64 is provided obliquely to the opening 58 side of the raising table housing 62 with respect to the axis 82A direction of the treatment instrument insertion path 82. The 2 nd surface 66 is provided obliquely to the opposite side of the opening 58 side of the standing table housing 62 with respect to the direction of the axis 82A of the treatment instrument insertion path 82. That is, in a state where the raising table 60 is located at the raising position, the 1 st surface 64 is formed obliquely upward with respect to the axis 82A of the treatment instrument insertion path 82, and the 2 nd surface 66 is formed obliquely downward with respect to the axis 82A of the treatment instrument insertion path 82. By providing the 1 st surface 64 obliquely to the opening 58 side of the standing stand accommodating portion 62, the cleaning liquid contacting the 1 st surface 64 can be guided to the opening 58 side as shown by an arrow C in fig. 6. Further, by providing the 2 nd surface 66 obliquely to the side opposite to the opening 58 side of the standing stand accommodating portion 62, that is, to the side opposite to the 1 st surface 64, as shown by an arrow D in fig. 6, the cleaning liquid contacting the 2 nd surface 66 can be guided to the rotation shaft 92 side and below the standing stand accommodating portion 62. Therefore, the cleaning liquid discharged from the treatment instrument outlet port 80 can be supplied to the inside of the raising table housing portion 62, particularly, to the lower surface side of the raising table 60.

In the standing stand 60 located at the collapsed position, the 1 st surface 64 is disposed inside the region facing the treatment instrument outlet 80, and the 2 nd surface 66 is disposed outside the region facing the treatment instrument outlet 80. That is, in fig. 7, when the raising table 60 and the treatment instrument lead-out port 80 located at the falling positions are projected on the virtual plane 83 orthogonal to the direction of the axis 82A of the treatment instrument insertion path 82, the region 64B of the 1 st surface 64 and the region 80A of the treatment instrument lead-out port 80 are disposed at the overlapping positions. The region 66B of the 2 nd surface and the region 80A of the treatment instrument outlet 80 are disposed at different positions. By disposing the 1 st surface 64 inside the opposing region and disposing the 2 nd surface 66 outside the opposing region, the treatment instrument led out from the treatment instrument outlet port 80 can be smoothly guided to the 1 st surface 64 of the raising table 60 in the collapsed position of the raising table 60. In addition, even when the raising table 60 is moved to the raising position and the lowering position in the state where the treatment instrument is guided, the guide direction of the treatment instrument can be favorably changed.

Fig. 8 is a diagram illustrating a positional relationship between the treatment instrument outlet 80 and the rising base 60. In fig. 8, the state in which the stand 60 is in the falling position is shown by a solid line, and the state in the standing position is shown by a two-dot chain line.

In a state where the raising table 60 is located at the raising position, the branch point 65 as the boundary between the 1 st surface 64 and the 2 nd surface 66 is disposed above an imaginary line 81 extending the lower end of the treatment instrument lead-out port 80 in the direction of the axis 82A of the treatment instrument insertion path 82. With this configuration, in the standing state of the standing table 60, the 1 st surface 64 and the 2 nd surface 66 can be disposed inside the region facing the treatment instrument outlet 80, and the cleaning liquid can be brought into contact with the 1 st surface 64 and the 2 nd surface 66.

In a state where the raising table 60 is located at the raising position, the angle α formed by the 2 nd surface 66 and the axis 82A of the treatment instrument insertion path 82 is set to an angle larger than 90 °. This leads the cleaning liquid contacting the 2 nd surface 66 to the rotary shaft 92 side, and the cleaning performance of the rotary shaft 92 can be improved.

When the standing base 60 is tilted, the branch point 65 is disposed below the virtual line 81. An angle β formed by a line connecting the branch point 65 and the center point of the rotation axis 92 and a line parallel to the 1 st direction is 0 ° or more on the distal end side. With such a configuration, the treatment instrument led out from the treatment instrument outlet 80 can be smoothly guided to the 1 st surface 64 of the standing table 60.

Further, in a state where the raising base 60 is located at the falling position, the 2 nd surface 66 of the raising base 60 is preferably disposed at the distal end side in the axis 38 direction with respect to the rotation axis 92 of the raising base 60 when viewed from the rotation axis 92 direction of the raising base 60. By disposing the 2 nd surface 66 on the distal end side of the rotation shaft 92 of the raising table 60, the 2 nd surface 66 can be disposed in the opposing region when the raising table 60 is disposed at the raising position.

The standing base 60 shown in fig. 6 to 8 is formed by directly connecting the 1 st surface 64 and the 2 nd surface 66, but may be connected between the 1 st surface and the 2 nd surface via another surface if the standing base has the 1 st surface and the 2 nd surface inside the region facing the treatment instrument outlet 80, and the 1 st surface is inclined toward the opening side and the 2 nd surface is inclined toward the opposite side with respect to the axial direction of the treatment instrument insertion passage. The 1 st surface 64 and the 2 nd surface 66 are not limited to a flat surface, and the 1 st surface 64 and the 2 nd surface 66 may be formed as smooth and continuous curved surfaces as long as the cleaning liquid can be guided in the respective directions even if either or both of the 1 st surface 64 and the 2 nd surface 66 are curved surfaces.

Fig. 9 is a bottom view of the tip end body. As described above, the tip end portion main body 36 has the bottom wall portion 78 penetrating the raising table housing portion 62, and the cleaning communication hole 84 communicating the raising table housing portion 62 with the outside. Further, a spot facing 90 is provided around the cleaning communication hole 84, and the spot facing 90 is recessed so that a syringe for supplying a cleaning liquid can be fitted therein. By providing the spot facing 90, a syringe for supplying a cleaning liquid (chemical liquid) can be fixed. Therefore, the shaking of the syringe when supplying the cleaning liquid can be prevented, and the cleaning liquid can be reliably supplied to a predetermined position, for example, the stand 60. The syringe may be fixed so that the outer cylinder of the syringe is not moved by the spot-facing portion 90. By inserting a brush from the cleaning communication hole 84, the portion of the standing stand 60 opposite to the opening 58 can be easily cleaned.

As shown in fig. 9, the tip end portion main body 36 preferably has a cover 88 that is detachably attached to the cleaning communication hole 84. When the insertion portion 12 of the endoscope 1 is inserted into the body cavity of the subject, the cleaning communication hole 84 is closed by attaching the cover 88 to the cleaning communication hole 84, and thereby, adhesion of dirt to the inside of the standing table housing portion 62 can be suppressed. When the standing table 60 is cleaned, the lid 88 is removed from the cleaning communication hole 84, whereby the cleaning tool can clean the back side and the peripheral portion of the standing table.

As described above, according to the present embodiment, when the stand 60 is raised, the 1 st surface 64 and the 2 nd surface 66 constituting the stand 60 are disposed in the region opposed to the treatment instrument outlet 80, the 1 st surface 64 is provided obliquely to the opening 58 side with respect to the axis 82A direction of the treatment instrument insertion passage 82, and the 2 nd surface 66 is provided obliquely to the side opposite to the opening 58. Thus, the cleaning liquid discharged from the treatment instrument outlet port 80 can be guided to the opening side of the standing table housing portion 62 and the rotation shaft 92 side of the standing table by the 1 st surface 64 and the 2 nd surface 66, and therefore, an effect of improving the cleaning performance of the standing mechanism can be obtained.

In the above, the convex ultrasonic transducer was used for the description, but the present invention is not limited to the convex ultrasonic transducer, and can be applied to a radial ultrasonic transducer.

Description of the symbols

1-endoscope, 10-operation section, 12-insertion section, 14-universal cord, 16-angle knob, 18-raising operation rod, 20-air-and-water-feeding knob, 22-suction knob, 24-treatment instrument introduction port, 30-flexible section, 32-bending section, 34-tip section, 36-tip section body, 38-tip section body axis, 40-base section, 42-extension section, 44-observation window, 44A-observation window center line, 45-observation window axis line, 46L, 46R-illumination window, 48-air-and-water-feeding nozzle, 50-ultrasonic transducer, 52-ultrasonic wave transmitting/receiving surface, 58-opening section, 60-raising table, 60A-raising table center line, 62A-raising table housing section, 64. 64A, 64B-1 st surface, 65-branch point, 66A, 66B-2 nd surface, 68-standing wall portion, 72-observation member forming surface, 78-bottom wall portion, 80A-treatment instrument lead-out port, 81-virtual line, 82-treatment instrument insertion channel, 82A-axis of treatment instrument insertion channel, 83, 87-virtual surface, 84-cleaning communication hole, 86A-signal cable, 88-cover, 89A-cable insertion hole, 90-countersink portion, 92-rotation shaft.