CN112438687A

CN112438687A - Endoscope with a detachable handle

Info

Publication number: CN112438687A
Application number: CN202010881801.9A
Authority: CN
Inventors: 原田高志
Original assignee: Fujifilm Corp
Current assignee: Fujifilm Corp
Priority date: 2019-08-29
Filing date: 2020-08-27
Publication date: 2021-03-05
Also published as: JP2021029938A; JP7097860B2

Abstract

The invention provides an endoscope capable of improving the durability of a water supply device. The endoscope is provided with: a rising table (36) which is disposed in a rising table housing space (66) formed in the front end portion main body (32), is provided so as to be rotatable about a rotation axis (86) between a rising position and a falling position, and has a connection port (94) provided in a region on the opposite side of the rotation axis (86) in a direction orthogonal to the rotation axis (86) and an injection port (96) communicating with the connection port (94); an outlet (45) which is provided in the distal end body (32) and is formed in the body end surface (25); and a liquid supply pipe (98) which is connected between the outlet port (45) and the connection port (94), has at least a flexible pipe (100), and can guide the fluid flowing out from the outlet port (45) to the connection port (94) through the liquid supply pipe (98) and spray from the spray port (96), wherein the spray direction of the fluid can be changed according to the rotation position of the standing table (36).

Description

Endoscope with a detachable handle

Technical Field

The present invention relates to an endoscope, and more particularly, to an endoscope capable of supplying water in an observation direction from a standing stand provided at a distal end portion of an insertion portion.

Background

In an endoscope, various treatment instruments are introduced from a treatment instrument introduction port provided in a hand-held operation portion, and the treatment instruments are guided to the outside from an upright stand accommodating space opened at a distal end portion of an insertion portion and used for treatment. For example, a treatment instrument such as a forceps or a contrast tube is used for a duodenoscope, and a treatment instrument such as a puncture needle is used for an ultrasonic endoscope. In order to treat a desired position in a subject, such a treatment instrument needs to be changed in the direction of leading out the treatment instrument from the stand accommodating space to the outside.

For example, in an endoscope disclosed in patent document 1, an upright table (also referred to as a treatment instrument elevation table) is rotatably provided in an upright table housing space, and a lever (also referred to as a raising lever) for changing the posture of the upright table between an upright position and a collapsed position is provided in a hand-held operation portion. In the standing stand of patent document 1, the hand-held base end portion is rotatably supported by the distal end portion main body of the insertion portion via a pin (also referred to as a rotation shaft).

The endoscope disclosed in patent document 1 includes, in addition to an air supply and water supply device for cleaning an observation window, a water supply device for removing dirt and the like present in an observation direction (also referred to as a visual field direction). The water supply device supplies water from a front end opening formed on the standing platform towards the observation direction, and is provided with a water supply hose protruding from the main body end surface of the front end main body towards the front end side of the insertion part and a water supply port arranged on the standing platform, connected with the front end of the water supply hose and provided with the front end opening.

Patent document 1: japanese patent laid-open No. 2001 and 000389

However, in the endoscope of patent document 1, a connection portion between the water supply hose and the standing table is provided at a hand-held side base end portion of the standing table (i.e., a side of the standing table on which the rotation shaft is arranged in a direction orthogonal to the rotation shaft). Therefore, in the endoscope of patent document 1, when the standing table is rotated from the collapsed position to the standing position, the water supply hose is bent at a large angle in the standing direction of the standing table.

That is, the endoscope of patent document 1 may be damaged by fatigue at the bending portion of the water supply hose when the rotation of the standing table is repeated. Further, since the connection portions at both ends of the water supply hose are also subjected to a load in the pulling direction, the connection portions at both ends may be damaged by fatigue. For this reason, the endoscope of patent document 1 has a problem that the durability of the water supply device is low.

Disclosure of Invention

The present invention has been made in view of such circumstances, and an object thereof is to provide an endoscope capable of improving the durability of a water supply device.

In order to achieve the object of the present invention, an endoscope of the present invention includes: an insertion part having a front end and a base end; a distal end portion body provided on a distal end side of the insertion portion; a treatment instrument outlet port provided in the distal end portion body and formed in a body end surface facing the distal end side of the insertion portion; a partition wall provided in the distal end portion main body and defining a standing table accommodating space facing the treatment instrument outlet; a standing table disposed in the standing table accommodation space and provided to be rotatable about a rotation axis between a standing position and a lying position; a connection port provided on the stand; a jet orifice provided on the standing table and communicating with the connection port; an outflow port provided in the front end body and formed in an end surface of the body; and a liquid supply pipe connected between the outlet port and the connection port, and having at least a flexible pipe, wherein the connection port is provided in a region on a side opposite to a side where the rotation shaft is arranged in a direction orthogonal to the rotation shaft in the standing stage.

In one aspect of the present invention, it is preferable that the connection port is provided at a position where a distance from the outflow port changes with rotation of the rising base, and the axial length of the liquid supply line is longer than a maximum value of the distance.

In one aspect of the present invention, the flexible pipe is preferably formed in a bellows shape which is extendable and retractable in the axial direction of the flexible pipe.

In one aspect of the present invention, it is preferable that the rising base has a treatment instrument guide surface for guiding the treatment instrument led out from the treatment instrument lead-out port, and a rising base back surface disposed on the opposite side of the treatment instrument guide surface, a connection port is provided on the rising base back surface, and the liquid supply line is disposed on the rising base back surface side.

In one aspect of the present invention, it is preferable that the upright base has a treatment instrument guide surface for guiding the treatment instrument led out from the treatment instrument outlet, and an upright base side surface which is continuous to the treatment instrument guide surface and has a normal line in a direction including an axial component of the rotary shaft, the upright base side surface is provided with a connection port, and the liquid supply line is disposed on the upright base side surface side.

In one aspect of the present invention, it is preferable that the upright base has a treatment instrument guide surface for guiding the treatment instrument led out from the treatment instrument outlet, and an adjacent surface adjacent to the treatment instrument guide surface and surrounding the treatment instrument guide surface, the adjacent surface is provided with a connection port, and the liquid supply line is disposed on the adjacent surface side.

In one aspect of the present invention, it is preferable that the operation wire is inserted into the liquid supply line, and an end of the operation wire is connected to the rising base.

In one aspect of the present invention, it is preferable that the ejection port has an observation optical system which is disposed on the partition wall and observes an observation direction orthogonal to the longitudinal axis direction of the insertion portion, and the ejection direction of the ejection port when the rising stand is located at the falling position is a direction having a component of the observation direction.

One aspect of the present invention preferably includes a top cover detachably attached to the distal end portion body, the liquid supply line includes a connection line connected to the outlet, and the connection line is provided in the top cover.

In one aspect of the present invention, the connection line is preferably configured as a through hole formed in the top cover.

In one aspect of the present invention, the top cover preferably includes a shaft support portion that supports a rotating shaft of the raising table.

Effects of the invention

According to the present invention, the durability of the water supply device can be improved.

Drawings

Fig. 1 is a configuration diagram of an endoscope system including an endoscope according to an embodiment.

Fig. 2 is an enlarged perspective view of the distal end portion.

Fig. 3 is an assembled perspective view showing the structure of the tip end portion shown in fig. 2.

Fig. 4 is a perspective view of the tip end body as viewed from the X (+) side.

Fig. 5 is an assembled perspective view of the tip end portion main body and the stand.

Fig. 6 is a perspective view of the water supply device provided in the tip end portion main body as viewed from the X (+) side.

Fig. 7 is a side view of the water supply apparatus shown in fig. 6 as viewed from the X (+) side.

Fig. 8 is a top view of the standing table viewed from the Z (+) side.

Fig. 9 is a schematic cross-sectional view of the top cover of embodiment 1 in which the liquid supply line is integrated with the top cover.

Fig. 10 is a schematic cross-sectional view of the top cover of the 2 nd embodiment in which the liquid supply line is integrated with the top cover.

Fig. 11 is a schematic cross-sectional view of the top cover of embodiment 1 in which a liquid supply pipe is integrated with a rising base.

Fig. 12 is a schematic cross-sectional view of the top cover of embodiment 2 in which the liquid supply line is integrated with the rising base.

Fig. 13 is a top view of the water supply device of embodiment 2 as viewed from the Z (+) side.

Fig. 14 is a side view including a partial cross section of the water supply apparatus shown in fig. 13, as viewed from the X (+) side.

Fig. 15 is a sectional view of the stand and the water supply device shown in fig. 13.

Fig. 16 is a side view including a partial cross section of the water supply apparatus according to embodiment 3 as viewed from the X (+) side.

Fig. 17 is a sectional view of the water supply hose connected to the water supply line via the outflow port.

Detailed Description

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

Fig. 1 is a configuration diagram of an endoscope system 12 including an endoscope 10 according to an embodiment of the present invention. The endoscope system 12 includes an endoscope 10, a processor device 14, a light source device 16, and a display 18.

The endoscope 10 includes an operation portion 22 provided with a raising operation lever 20, and an insertion portion 24 provided on the distal end side of the operation portion 22 and inserted into the subject.

The insertion portion 24 has a longitudinal axis a extending from the proximal end to the distal end, and includes a soft portion 26, a curved portion 28, and a distal end portion 30 in this order from the proximal end to the distal end. The schematic structure of the distal end portion 30 will be described below.

Fig. 2 is an enlarged perspective view of the distal end portion 30. Here, the endoscope 10 shown in fig. 1 is a side-view endoscope used as a duodenoscope, for example, and the distal end portion 30 in fig. 2 has a structure in the side-view endoscope.

Fig. 3 is an assembled perspective view showing the structure of the tip end portion 30 shown in fig. 2. As shown in fig. 3, the distal end portion 30 includes a distal end portion body 32 and a top cover 34, and is configured by attaching the top cover 34 to the distal end portion body 32. The distal end portion main body 32 is provided on the distal end side of the insertion portion 24 shown in fig. 1, and an upright stand 36 described later is provided on the distal end portion main body 32. Fig. 2 and 3 show the standing table 36 in the laid-down position.

Fig. 2 and 3 show various contents disposed inside the insertion portion 24 (see fig. 1). Specifically, a treatment instrument channel 38 for guiding a treatment instrument (not shown) to the distal end portion body 32, an upright operation wire 40 (hereinafter, referred to as a wire 40) for performing an operation of changing the operation direction of the treatment instrument led out from the distal end portion body 32, an air and water supply hose 42, and a loose water hose 44 are provided. Although not shown in fig. 2 and 3, contents such as an angle wire for changing the bending direction of the bending portion 28 (see fig. 1), a signal cable for transmitting an image signal, and a light guide for transmitting light for illumination are provided.

In the following, the structure of each part will be described using a three-dimensional rectangular coordinate system of X, Y, and Z axes. That is, when the direction in which the treatment instrument (not shown) is led out by the raising table 36 is an upward direction when the distal end portion 30 is viewed from the operation portion 22, the upward direction is a Z (+) direction, and a downward direction which is an opposite direction to the upward direction is a Z (-) direction. The right direction at this time is defined as the X (+) direction, and the left direction is defined as the X (-) direction. At this time, the front direction (the direction of the front end side in the direction of the vertical axis a of the insertion portion 24) is defined as the Y (+) direction, and the rear direction (the direction of the base end side in the direction of the vertical axis a of the insertion portion 24) is defined as the Y (-) direction.

As shown in fig. 1, the operation portion 22 is formed in a substantially cylindrical shape as a whole. The operation portion 22 includes an operation portion main body 46 in which the raising operation lever 20 is rotatably provided, and a grip portion 48 provided continuously to the operation portion main body 46, and a proximal end portion of the insertion portion 24 is connected to a distal end side of the grip portion 48 via a bending prevention pipe 50. The grasping unit 48 is a portion grasped by a medical practitioner when operating the endoscope 10.

The operation portion main body 46 is provided with a universal cable 52. A light source connector 54 is provided on the distal end side of the universal cable 52, and the light source device 16 is connected to the light source connector 54. An electrical connector 56 is branched from the light source connector 54, and the electrical connector 56 is connected to the processor device 14.

The operation unit main body 46 is provided with an air supply/water supply button 57 and a suction button 59 in parallel. When the medical practitioner operates the air supply/water supply button 57, air or liquid is supplied to the air supply/water supply hose 42 of fig. 2. A gas/water supply nozzle 58 for cleaning the observation optical system 76 is provided on the tip end side of the gas/water supply hose 42, and gas or liquid is ejected from the gas/water supply nozzle 58 toward the observation optical system 76. The observation optical system 76 will be described later.

The water supply hose 44 is disposed from the insertion portion 24 to the universal cable 52 via the operation portion 22, and a base end of the water supply hose 44 is opened to the light source connector 54 as a connector connection portion for water spraying (not shown). A liquid tank (not shown) is connected to the connector connection portion via a liquid feed pump (not shown). When the liquid supply pump is driven by a separately provided electric switch, liquid is supplied from the liquid tank to the water supply hose 44 via the connector connection portion. As shown in fig. 3, the tip of the water supply hose 44 is opened as an outflow port 45 in the tip end body 32. Accordingly, the liquid supplied to the water supply hose 44 flows out from the outflow port 45. The outflow port 45 is formed in the body end surface 25 facing the distal end side of the insertion portion 24.

Further, a liquid supply method using the liquid supply pump is an example. For example, a liquid supply method may be employed in which the supply line for supplying water is switched from the air supply/water supply hose 42 to the water supply hose 44 by full-pressing the air supply/water supply button 57.

On the other hand, when the suction button 59 of fig. 1 is operated by the medical practitioner, a body fluid such as blood is sucked from the treatment instrument outlet 60 provided in the distal end portion main body 32 of fig. 2 through the treatment instrument channel 38. The treatment instrument outlet 60 is also formed in the body end surface 25, similarly to the outflow port 45.

As shown in fig. 1, a pair of corner knobs 62 and 62 for bending the bending portion 28 are disposed on the operation portion main body 46. The pair of corner knobs 62, 62 are coaxially and rotatably provided.

The raising operation lever 20 is provided to be rotatable coaxially with the corner knobs 62, 62. The raising operation lever 20 is rotated by the hand of the medical practitioner who grips the grip portion 48. When the raising operation lever 20 is rotationally operated, the wire 40 in fig. 2 is pushed and pulled in conjunction with the rotational operation of the raising operation lever 20. In this way, by operating the wire 40, the posture of the standing table 36 connected to the tip end side of the wire 40 is changed between the falling position and the standing position (see fig. 7) in fig. 3.

As shown in fig. 1, a treatment instrument introduction port 64 for introducing a treatment instrument is provided in the grip portion 48 of the operation portion 22. A treatment instrument (not shown) introduced from the treatment instrument introduction port 64 with the distal end portion thereof as the tip is inserted into the treatment instrument channel 38 of fig. 2 and is led out to the outside from the treatment instrument lead-out port 60 provided in the distal end portion main body 32.

As shown in fig. 1, the soft portion 26 of the insertion portion 24 has a spiral tube (not shown) in which a thin metal strip plate having elasticity is spirally wound. The soft portion 26 is formed by covering the outside of the spiral tube with a tubular mesh body woven with metal wires and covering the outer peripheral surface of the mesh body with a resin outer skin.

The bending portion 28 of the insertion portion 24 has a structure in which a plurality of angle rings (not shown) are rotatably connected to each other. The bending portion 28 is formed by covering the outer periphery of the structure with a tubular mesh body woven with metal wires and covering the outer peripheral surface of the mesh body with a tubular outer skin made of rubber. For example, four angle wires (not shown) are arranged from the bending portion 28 to the corner knobs 62 and 62, and the bending portion 28 is bent upward, downward, leftward, and rightward by pushing and pulling the angle wires through the turning operation of the corner knobs 62 and 62.

As described above, the endoscope 10 of the embodiment configured as described above is a side-view endoscope used as a duodenoscope, and the insertion section 24 is inserted into the subject via the oral cavity. The insertion portion 24 is inserted from the esophagus to the duodenum through the stomach, and performs a predetermined examination, treatment, or the like. The treatment instrument used in the scope 10 may be exemplified by a biopsy forceps having a cup at the distal end thereof, which can extract a living tissue, and a treatment instrument such as a scalpel for EST (Endoscopic Sphincterotomy) or a contrast tube.

Next, the detailed structure of the distal end portion 30 will be described with reference to fig. 2 and 3.

As described above, the distal end portion 30 is configured by attaching the top cover 34 to the distal end portion main body 32. A convex engaging portion (not shown) is provided on the base end side of the top cover 34, and the top cover 34 is detachably attached to the distal end portion body 32 by engaging the engaging portion with a groove-shaped engaged portion (not shown) formed in the distal end portion body 32.

The top cover 34 is formed of a substantially cylindrical body having a closed front end side and an open base end side, and a substantially rectangular opening window 34A is provided in a part of the outer peripheral surface thereof. As shown in fig. 2, when the top cover 34 is attached to the distal end portion main body 32, the opening window 34A is disposed in the Z (+) direction, which is a direction orthogonal to the longitudinal axis a direction. Thus, the treatment instrument outlet 60 communicates with the opening window 34A via the standing platform accommodating space 66 provided in the distal end portion main body 32. The standing platform accommodating space 66 will be described later.

The top cover 34 is made of a resilient material such as a rubber material such as fluororubber or silicone rubber, or a resin material such as polysulfone or polycarbonate. When the treatment of the endoscope 10 is completed, the cap 34 is detached from the distal end portion main body 32 and is cleaned and sterilized or is discarded as a disposable one.

As shown in fig. 3, the distal end portion main body 32 has a pair of

partition walls

68 and 70 protruding toward the Y (+) side, and these

partition walls

68 and 70 are disposed to face each other in the X axis direction. The rising table accommodating space 66 for accommodating the rising table 36 is provided between the partition wall 68 and the partition wall 70. The standing table accommodating space 66 faces the treatment instrument outlet 60 and is defined by

partition walls

68 and 70. The standing stand accommodating space 66 is open in the Z (+) direction and the Z (-) direction perpendicular to the vertical axis a direction.

An illumination optical system 74 having an illumination window and an observation optical system 76 having an observation window are disposed adjacent to each other in the Y-axis direction on the upper surface 68A on the Z (+) side of the partition wall 68. The observation optical system 76 allows observation of the subject in the observation direction. The observation direction is a Z (+) direction in which the standing platform accommodation space 66 opens in a direction orthogonal to the direction of the vertical axis a of the insertion portion 24 (see fig. 1). The air/water supply nozzle 58 is provided in the distal end portion main body 32 toward the observation optical system 76, and the observation optical system 76 is cleaned and dried by the gas and liquid ejected from the air/water supply nozzle 58.

A housing chamber 72 is provided inside the partition wall 68. The housing chamber 72 houses an illumination unit (not shown). The illumination unit includes a light guide (not shown) disposed on the side of the housing chamber 72 of the illumination optical system 74. The light guide is disposed from the insertion portion 24 of the endoscope 10 (see fig. 1) to the universal cable 52 via the operation portion 22, and a proximal end thereof is connected to the light source connector 54. Therefore, when the light source connector 54 is connected to the light source device 16, the light emitted from the light source device 16 is transmitted to the illumination optical system 74 via the light guide, and is emitted from the illumination optical system 74 in the observation direction.

The housing chamber 72 houses an imaging unit (not shown). The imaging unit includes a CMOS (complementary metal) disposed on the side of the housing chamber 72 of the observation optical system 76_oOxide semiconductor: complementary metal oxide semiconductor) type or CCD (Charge Coupled Device: charge coupled device) type imaging element (not shown). The subject image is formed on the image forming surface of the imaging element by an imaging lens (not shown) constituting the observation optical system 76. The distal end of a signal cable (not shown) is connected to the imaging element, and the signal cable is disposed from the insertion portion 24 of the endoscope 10 (see fig. 1) to the universal cable 52 via the operation portion 22, and the proximal end thereof is connected to the electrical connector 56. Therefore, when the electrical connector 56 is connected to the processor device 14, an image pickup signal of the object image obtained by the image pickup section is transmitted to the processor device 14 via the signal cable. The image pickup signal is subjected to image processing by the processor device 14 and then displayed on the display 18 as a subject image.

Next, the structure of the rising base 36 will be described with reference to fig. 4 and 5.

Fig. 4 is a perspective view of the tip end portion main body 32 of fig. 3 as viewed from the X (+) side, and fig. 5 is an assembled perspective view of the tip end portion main body 32 and the stand 36.

A rising rod accommodating chamber 78 is provided on the side surface on the X (+) side of the partition wall 70, and a rising rod 80 is accommodated in the rising rod accommodating chamber 78. The rising bar housing chamber 78 is formed in a fan-shaped concave shape, and is covered and sealed by a protection plate not shown. A through-hole 82 for passing and disposing the wire 40 is provided in the Y-axis direction in the Y (-) side surface 78A of the upright rod housing chamber 78. The distal end of the wire 40 is inserted through the through hole 82 and fixed to the rod portion 80A of the rising rod 80.

As shown in fig. 5, the partition wall 70 is provided with a through hole 84 that communicates the raising rod accommodating chamber 78 and the raising table accommodating space 66 in the X-axis direction. The rotation shaft 86 of the rising lever 80 is disposed through the through hole 84, and the rotation shaft 86 is rotatably supported by the through hole 84. A distal end portion of the rotating shaft 86 inserted through the through hole 84 is fitted into a hole 88 provided in the base end portion 36A of the rising base 36. Thus, the raising rod 80 and the raising table 36 are coupled via the rotating shaft 86.

According to the raising base 36 configured as described above, when the wire 40 is pushed or pulled by the raising operation lever 20 (see fig. 1), the rotation shaft 86 rotates together with the raising lever 80, and the raising base 36 rotates between the falling position (see fig. 4) and the raising position (see fig. 7) about the rotation shaft 86. By the rotation operation of the raising table 36, the direction of the treatment instrument guided out from the treatment instrument guide-out port 60 to the raising table housing space 66 is changed. Further, an O-ring (not shown) is disposed between the rotary shaft 86 and the through hole 84 to prevent intrusion of gas and liquid between the rising table accommodating space 66 and the rising rod accommodating chamber 78.

Next, a water supply device 90 according to embodiment 1 that ejects liquid from the rising base 36 will be described with reference to fig. 6 and 7.

Fig. 6 is a perspective view of the water supply device 90 provided in the distal end portion main body 32 as viewed from the X (+) side, and shows a state before a connection pipe 92, which is a part of the water supply device 90, is connected to the outflow port 45. Fig. 6 is a view in which the partition wall 70 (see fig. 4) is omitted, and shows the standing platform 36 in the laid-down posture.

Fig. 7 is a side view of the water supply device 90 shown in fig. 6 as viewed from the X (+) side, and shows a state in which the connection pipe 92 is connected to the outflow port 45. Fig. 7 shows the standing table 36 in the standing posture.

The water supply device 90 is a device for ejecting liquid toward dirt and the like existing in the observation direction and removing the dirt and the like, unlike the cleaning device for cleaning the observation optical system 76 with the liquid ejected from the air and water supply nozzle 58.

As shown in fig. 6 and 7, the water supply device 90 includes the above-described liquid supply pump (not shown), the water supply hose 44, the outlet 45, the connection port 94, the injection port 96, and the liquid supply line 98. The liquid feed pump, the water feed hose 44, and the outlet 45 are described above, and therefore, the description thereof is omitted here.

The connection port 94 is provided on the rising base 36. Specifically, the connection port 94 is provided at the front end portion 36B of the rising base 36 and at the rising base back surface 36D of the rising base 36. Here, the front end portion 36B of the standing base 36 is a portion that is present in a region opposite to the rotation shaft 86 in a direction orthogonal to the axial center 86A of the rotation shaft 86. A treatment instrument guide surface 36C (see fig. 6) for guiding the treatment instrument led out from the treatment instrument lead-out port 60 (see fig. 2) is provided on the opposite side of the rising table back surface 36D.

The injection port 96 is provided at the front end portion 36B of the rising base 36, similarly to the connection port 94. The ejection port 96 is open at the distal end surface 36E connected to the treatment instrument guide surface 36C and the rising table rear surface 36D. The front end surface 36E is configured such that a normal B of the front end surface 36E has a component in the Z (+) direction even when the posture of the standing table 36 is changed between the falling position (see fig. 6) and the standing position (see fig. 7). Thus, even in the case where the rising table 36 is located at the falling position, the ejection direction of the ejection ports 96 is set to a direction having a component of the observation direction of the observation optical system 76 (refer to fig. 2). The injection port 96 configured as described above communicates with the connection port 94 via a communication passage 97 provided inside the distal end portion 36B.

The liquid supply line 98 is a line connecting the outflow port 45 and the connection port 94, and includes a flexible line 100 in addition to the connection line 92 described above. Referring to fig. 7, the base end 92A of the connecting line 92 is connected to the outlet port 45, the tip end 92B of the connecting line 92 is connected to the base end 100A of the flexible line 100, and the tip end 100B of the flexible line 100 is connected to the connection port 94.

The connection portion 102 between the connection pipe 92 and the flexible pipe 100 is disposed on the Z (+) side and the Y (+) side with respect to the rotation shaft 86, and is disposed on the X (+) side with respect to the base end portion 36A of the raising table 36. Thus, the flexible pipe 100 is drawn out from the connection portion 102 to the X (-) side and disposed on the side of the rising table back surface 36D, and the distal end portion 100B thereof is connected to the connection port 94.

On the other hand, the outflow port 45 is provided on the Z (+) side and at a position shifted to the Y (-) side with respect to the rotation shaft 86. Accordingly, the connection port 94 is provided at a position where the distance from the outlet port 45 changes with the rotation of the rising base 36. Specifically, when the standing table 36 is in the collapsed position (see fig. 4), the connection port 94 is provided at a position where the distance from the outflow port 45 is the maximum, and when the standing table 36 is in the standing position (see fig. 7), the connection port 94 is provided at a position where the distance from the outflow port 45 is the minimum.

That is, when the shaft center 86A of the rotating shaft 86 and the outlet port 45 are projected on the paper surface of fig. 7, the outlet port 45 is located on the Z (+) side and is eccentric to the Y (-) side with respect to the shaft center 86A, and thus, as described above, a difference occurs in distance. In this way, in consideration of the difference in distance, the axial length of the liquid supply line 98 is set to be longer than the maximum value of the distance. Thus, even when the rising base 36 rotates between the lowered position and the rising position, the liquid supply line 98 remains in a state where the surplus length is generated.

In this example, the flexible pipe 100 is exemplified by PTFE (P)_oly Tetra Fluoro Ethylene: polytetrafluoroethylene), etc., the flexible tube may be formed as a bellows-like tube in which the flexible tube 100 is configured to be extendable and retractable in the axial direction. Further, as the connection pipe 92, a straight pipe made of an acrylic resin material harder than the flexible pipe 100 is exemplified, but the same applies to the flexible pipe 100Flexible hoses or bellows-like hoses may be used.

Next, an operation of water supply device 90 according to embodiment 1 will be described.

By driving the liquid supply pump, the liquid supplied to the water supply hose 44 (refer to fig. 3) flows into the connection pipe 92 from the outflow port 45 of fig. 7. Then, the liquid is guided from the connection pipe 92 to the connection port 94 through the flexible pipe 100, and is ejected from the ejection port 96 toward the observation direction through the communication path 97. This enables removal of dirt and the like located in the observation direction. When the ejection direction of the liquid is to be changed, the raising table 36 is rotated between the raising position and the falling position. This enables the ejection direction of the liquid to be changed according to the rotational position of the rising base 36.

Further, since the connection port 94 provided on the stand 36 is provided at the distal end portion 36B of the stand 36, the flexible pipe 100 is gently bent from the connection portion 102 even when the stand 36 is rotated from the collapsed position to the stand position. This makes it difficult for the flexible pipe 100 to bend, and therefore, the durability of the flexible pipe 100, that is, the durability of the water supply device 90, can be improved.

On the other hand, in the endoscope disclosed in patent document 1, since the connection portion between the water supply hose and the raising table is provided at the end portion of the hand-held side of the raising table (i.e., the side of the raising table where the rotation shaft is arranged in the direction orthogonal to the rotation shaft), there is a possibility that the bent portion of the water supply hose is damaged by fatigue or the connection portions at both ends of the water supply hose are damaged by fatigue when the rotation of the treatment instrument raising table is repeated.

In contrast, according to the endoscope 10 of the embodiment, since the connection port 94, which is a connection portion between the liquid supply pipe 98 and the stand 36, is provided at the distal end portion 36B of the stand 36 (i.e., in the region of the stand on the opposite side of the direction perpendicular to the rotation axis from the side on which the rotation axis is arranged), even when the stand 36 rotates from the collapsed position to the raised position, a bent portion is less likely to occur in the flexible pipe 100, and the durability of the water supply device 90 can be improved.

Further, according to the endoscope 10 of the embodiment, even when the distance between the outflow port 45 and the connection port 94 changes with the rotation of the stand 36, the liquid supply pipe 98 is configured to be longer than the maximum value of the distance (in the present example, the distance between the outflow port 45 and the connection port 94 when the stand 36 is positioned at the collapsed position), and therefore, even if the stand 36 is rotated, the pulling force does not act on the liquid supply pipe 98. This can further improve the durability of the liquid supply line 98.

Further, according to the endoscope 10 of the embodiment, since the connection port 94 is provided on the rising table back surface 36D of the rising table 36 and the flexible tube 100 is disposed on the side of the rising table back surface 36D, the treatment instrument guided by the treatment instrument guide surface 36C can be prevented from interfering with the flexible tube 100. This can prevent the flexible tube 100 from being damaged by interference with the treatment instrument.

Further, according to the endoscope 10 of the embodiment, since the ejection direction of the ejection port 96 when the standing table 36 is positioned at the collapsed position is a direction having a component of the observation direction of the observation optical system 76, even when the standing table 36 is positioned at the collapsed position, the liquid can be ejected in the observation direction.

In the endoscope 10 of the embodiment, the liquid supply line 98 is constituted by the connection line 92 and the flexible line 100, but the proximal end portion 100A of the flexible line 100 may be directly connected to the outflow port 45 without using the connection line 92.

Here, the arrangement position of the ejection port 96 with respect to the rising base 36 will be described with reference to fig. 8. Fig. 8 is a top view of the rising table 36 as viewed from the Z (+) side.

In the water supply device 90 according to embodiment 1, the injection port 96 is opened to the distal end surface 36E formed on the Y (+) side with respect to the treatment instrument guide surface 36C, but the opening position of the injection port 96 is not limited to this position. For example, the ejection port 96 may be opened to the upper right surface 36F formed on the X (+) side or the upper left surface 36G formed on the X (-) side with respect to the treatment instrument guide surface 36C.

However, in the endoscope in which the distal end portion 40A of the wire 40 is directly connected to the right upper surface 36F of the standing table 36, if the injection port 96 is opened to the right upper surface 36F, the space of the right upper surface 36F has to be enlarged, and as a result, the diameter of the distal end portion 30 of the insertion portion 24 may be increased. Further, if the ejection port 96 is opened to the left upper surface 36G, the treatment instrument having the bending characteristic may disturb the ejection direction of the ejection port 96. Therefore, from the viewpoint of reducing the diameter of the distal end portion 30 and the viewpoint of preventing the liquid ejected from the ejection port 96 from interfering with the treatment instrument, it is preferable that the ejection port 96 is opened at the distal end surface 36E as in the water supply device 90 of embodiment 1. Although described later, the right upper surface 36F and the left upper surface 36G correspond to adjacent surfaces that are adjacent to the treatment instrument guide surface 36C and surround the treatment instrument guide surface 36C.

Fig. 9 is a schematic cross-sectional view of the top cover 34 according to embodiment 1 in which the liquid supply line 98 is integrated with the top cover 34.

When the top cover 34 is attached to the distal end portion body 32 (see fig. 3), the connection pipe 92 of the liquid supply pipe 98 shown in fig. 9 is provided to the top cover 34 at a position where the base end portion 92A of the connection pipe 92 is connected to the outlet port 45. Therefore, the base end portion 92A of the connecting line 92 can be connected to the outlet port 45 only by attaching the top cover 34 to the distal end portion body 32. This eliminates the trouble of manually connecting the proximal end 92A of the connecting line 92 to the outlet port 45. Examples of the manner of providing the connection pipe 92 to the top cover 34 include a manner of fixing the connection pipe 92 to the top cover 34 with an adhesive and a manner of integrally forming the connection pipe 92 to the top cover 34.

Fig. 10 is a schematic cross-sectional view of the top cover 34 according to embodiment 2 in which the liquid supply line 98 is integrated with the top cover 34.

The connection line 92 of the liquid supply line 98 shown in fig. 10 is constituted by a through-hole 104 formed in the top cover 34. When the top cover 34 is attached to the distal end portion body 32, the connection pipe 92 is formed in the top cover 34 at a position where the base end portion 92A of the connection pipe 92 is connected to the outflow port 45. Therefore, the base end portion 92A of the connecting line 92 can be connected to the outlet port 45 only by attaching the top cover 34 to the distal end portion body 32. This eliminates the trouble of manually connecting the proximal end 92A of the connecting line 92 to the outlet port 45.

Further, as shown in fig. 9 and 10, the liquid supply line 98 can be removed from the distal end portion body 32 together with the top cover 34 by integrating the liquid supply line 98 in the top cover 34. This can improve the cleaning performance of the distal end portion main body 32. The liquid supply line 98 can be cleaned, sterilized, or discarded together with the top cover 34.

Fig. 11 is a schematic cross-sectional view showing the top cover 34 of the 1 st embodiment in which the liquid supply line 98 is integrated with the rising base 36 in the top cover 34. In the description of the embodiment of fig. 11, the same or similar components as those shown in fig. 9 will be denoted by the same reference numerals.

In the top cover 34 shown in fig. 11, a convex shaft support portion 106 is provided on the inner peripheral surface of the top cover 34, and the rotating shaft 86 of the rising base 36 is axially supported by the shaft support portion 106. The liquid supply pipe 98 is integrated with the top cover 34 as shown in fig. 9, and the distal end portion 100B of the flexible pipe 100 is connected to the connection port 94 of the rising base 36.

According to the aspect of fig. 11 configured as described above, the connection port 94 of the stand 36 can be connected to the outflow port 45 of the distal end portion body 32 via the liquid supply pipe 98 only by attaching the top cover 34 to the distal end portion body 32.

Fig. 12 is a schematic cross-sectional view showing the top cover 34 of the 2 nd embodiment in which the liquid supply line 98 is integrated with the rising base 36 in the top cover 34. In the description of the embodiment of fig. 12, the same or similar components as those shown in fig. 10 will be denoted by the same reference numerals.

In the top cover 34 shown in fig. 12, a convex shaft support portion 106 is provided on the inner peripheral surface of the top cover 34, and the rotating shaft 86 of the rising base 36 is axially supported by the shaft support portion 106. The top cover 34 and the liquid supply pipe 98 are integrated as shown in fig. 10, and the distal end portion 100B of the flexible pipe 100 is connected to the connection port 94 of the rising table 36.

According to the embodiment of fig. 12 configured as described above, the connection port 94 of the stand 36 can be connected to the outflow port 45 of the distal end portion body 32 via the liquid supply pipe 98 only by attaching the top cover 34 to the distal end portion body 32.

As shown in fig. 11 and 12, the liquid supply line 98 and the rising base 36 can be removed from the distal end portion body 32 together with the top cover 34 by integrating the liquid supply line 98 and the rising base 36 in the top cover 34. This can improve the cleaning performance of the distal end portion main body 32. The liquid supply line 98 and the rising base 36 can be cleaned, sterilized, or discarded together with the top cover 34.

In the endoscope including the cap 34 shown in fig. 11 and 12, the distal end portion 40A (see fig. 8) of the wire 40 is directly connected to the standing base 36, and the distal end portion 40A of the wire 40 is connected to the upper right surface 36F shown in fig. 8 as an example.

Next, a water supply device 110 according to embodiment 2 will be described with reference to fig. 13, 14, and 15.

Fig. 13 is a top view of the water supply device 110 viewed from the Z (+) side. Fig. 14 is a cross-sectional view taken along line XIV-XIV of fig. 13, and is a side view including a partial cross-section of the water supply device 110 as viewed from the X (+) side. Fig. 15 is a sectional view of the rising stand 36 and the water supply device 110.

As shown in fig. 13 to 15, the raising table 36 has a raising table side surface 36H continuous with the treatment instrument guide surface 36C. The rising base side surface 36H has a direction including a component in the axial direction (X (+) direction) of the rotation shaft 86 as a normal line C. Further, a connection port 94 is provided on a front end side surface 36J of the front end portion 36B formed on the rising stand 36, of the rising stand side surface 36H. The connection port 94 communicates with the injection port 96 via a communication passage 97.

The distal end 112B of the liquid supply line 112 is bonded to the connection port 94, and the proximal end 112A of the liquid supply line 112 is bonded to the outlet port 45. Thus, the liquid supply line 112 is disposed on the side of the rising base side surface 36H. The liquid supply line 112 is formed in a bellows shape that is extendable and retractable in the axial direction. Therefore, according to the liquid supply line 112, the connection port 94 extends when it is laid down in fig. 14, which is farthest apart from the outlet port 45, and contracts when the flow connection port 94 is raised closest to the outlet port 45 (not shown).

On the other hand, a wire 40 for rotating the raising base 35 is inserted into the liquid supply pipe 112. As shown in fig. 15, the tip portion 40A of the wire 40 is inserted into the communication path 97 from the connection port 94 and fixed to the plug 114 that seals the opening 97A of the communication path 97. Thereby, the tip end portion 40A of the wire 40 is connected to the rising base 36.

According to the water supply device 110 of embodiment 2 configured as described above, the wire 40 is inserted and arranged in the liquid supply pipe 112, so that the wire 40 protruding from the distal end portion main body 32 to the distal end side can be protected by the liquid supply pipe 112.

Next, a water supply device 120 according to embodiment 3 will be described with reference to fig. 16. In the description of the water supply device 120, the same or similar components as those of the water supply device 110 shown in fig. 13 to 15 will be described with the same reference numerals.

The rising stand 36 shown in fig. 16 connects a distal end portion 112B of the liquid supply line 112 to a connection port 94 provided on the right upper surface 36F (see fig. 8), and the wire 40 is inserted into the liquid supply line 112. In the water supply device 120, the supply line 112 is disposed on the right upper surface 36F side. The distal end portion 40A of the wire 40 is inserted into the communication passage 97 from the connection port 94 and fixed to a plug 114 that seals the opening 97A of the communication passage 97.

Even in the water supply device 120 according to embodiment 3 configured as described above, the wire 40 protruding from the distal end portion main body 32 toward the distal end side can be protected by the liquid supply pipe 112 by inserting and disposing the wire 40 in the liquid supply pipe 112.

Further, according to the water supply device 120 of embodiment 3, since the wire 40 is inserted into the connection port 94, the right upper surface 36F can be made more space-saving than the standing table 36 in which the connection port 94 and the connection portion of the distal end portion 40A of the wire 40 are provided on the right upper surface 36F (see fig. 8). This enables the size of the rising base 36 to be reduced, and therefore, the size of the distal end portion 30 can be reduced. The connection port 94 may be provided on the left upper surface 36G (see fig. 8).

The liquid supply pipe 112 shown in fig. 13 to 16 may be integrated with the top cover 34 in the same manner as the liquid supply pipe 98 shown in fig. 9 and 10. The liquid supply line 98 shown in fig. 11 and 12 may be connected to the rising base 36 integrally formed with the top cover 34.

Fig. 17 is a sectional view of the water supply hose 44 connected to the liquid supply line 112 via the outflow port 45.

As shown in fig. 17, the wire 40 is inserted through the water supply hose 44. The water supply hose 44 branches inside the operation unit 22, the wire 40 is inserted into the branch line 122, and the base end portion 40B of the wire 40 is connected to the raising operation lever 20 via the raising operation mechanism 124.

An O-ring 126 is disposed between the wire 40 and the branch pipe 122 to prevent the liquid in the water supply hose 44 from leaking from the branch pipe 122 into the operation portion 22. With this configuration, the wire 40 can be pushed and pulled by the raising operation lever 20, and the liquid can be supplied to the liquid supply line 112.

The present invention has been described above, but the present invention is not limited to the above examples, and various improvements and modifications can be made without departing from the scope of the present invention.

Description of the symbols

10-endoscope, 12-endoscope system, 14-processor device, 16-light source device, 18-display, 20-raising operation rod, 22-operation portion, 24-insertion portion, 25-body end face, 26-soft portion, 28-bending portion, 30-tip portion, 32-tip portion body, 34-top cover, 34A-opening window, 36-raising table, 36A-base end portion, 36B-tip portion, 36C-treatment instrument guide face, 36D-raising table back face, 36E-tip end face, 36F-upper right face, 36G-upper left face, 36H-raising table side face, 36J-tip end side face, 38-treatment instrument channel, 40-raising operation line, 40A-tip end portion, 40B-base end portion, 42-air/water supply hose, 44-water supply hose, 45-outlet port, 46-operation portion body, 48-grip portion, 50-folding prevention tube, 52-universal cable, 54-light source connector, 56-electric connector, 57-air/water supply button, 58-air/water supply nozzle, 59-suction button, 60-treatment instrument guide port, 62-corner button, 64-treatment instrument introduction port, 66-standing table accommodation space, 68-partition wall, 68A-upper surface, 70-partition wall, 72-accommodation chamber, 74-illumination optical system, 76-observation optical system, 78-standing rod accommodation chamber, 78A-side surface, 80-standing rod, 80A-rod portion, 82-through hole, 84-through hole, 86-rotation shaft, 86A-axial center, 88-hole, 90-water supply device, 92-connecting pipeline, 92A-base end, 92B-front end, 94-connecting port, 96-jet port, 97-communication channel, 97A-opening, 98-liquid supply pipeline, 100-flexible pipeline, 100A-base end, 100B-front end, 102-connecting part, 104-through hole, 106-shaft supporting part, 110-water supply device, 112-liquid supply pipeline, 112A-base end, 112B-front end, 114-plug, 120-water supply device, 122-branch pipeline, 124-erecting operation mechanism, 126-O-ring, A-longitudinal axis, B-normal line and C-normal line.

Claims

1. An endoscope, comprising:

an insertion part having a front end and a base end;

a distal end portion body provided on a distal end side of the insertion portion;

a treatment instrument outlet port provided in the distal end portion body and formed in a body end surface facing the distal end side of the insertion portion;

a partition wall provided in the distal end portion main body and defining a standing table accommodating space facing the treatment instrument outlet;

a standing table disposed in the standing table accommodation space and provided to be rotatable about a rotation axis between a standing position and a lying position;

a connection port provided on the standing table;

a jet port provided on the rising table and communicating with the connection port;

an outlet port provided in the distal end body and formed in the body end surface; and

a liquid supply pipeline which is connected between the outflow port and the connecting port and at least provided with a flexible pipeline,

the connection port is provided in a region of the rising base opposite to a side where the rotation shaft is disposed in a direction orthogonal to the rotation shaft.

2. The endoscope of claim 1,

the connection port is provided at a position where a distance from the outlet port changes with rotation of the rising table,

the axial length of the liquid supply line is longer than the maximum value of the distance.

3. The endoscope of claim 1,

the flexible pipe is formed in a bellows shape which is extendable and retractable in an axial direction of the flexible pipe.

4. The endoscope of claim 2,

the raising table has a treatment instrument guide surface for guiding the treatment instrument led out from the treatment instrument lead-out port and a raising table back surface disposed on the opposite side of the treatment instrument guide surface,

the connection port is arranged on the back surface of the standing platform,

the liquid supply pipeline is arranged on the back side of the standing table.

5. The endoscope of claim 3,

the raising table has a treatment instrument guide surface for guiding the treatment instrument led out from the treatment instrument outlet, and a raising table side surface which is continuous with the treatment instrument guide surface and has a normal line in a direction including an axial component of the rotating shaft,

the connection port is arranged on the side surface of the standing platform,

the liquid supply pipeline is arranged on the side surface of the standing table.

6. The endoscope of claim 3,

the raising table has a treatment instrument guide surface for guiding the treatment instrument led out from the treatment instrument lead-out port, and an adjacent surface adjacent to the treatment instrument guide surface and surrounding the treatment instrument guide surface,

the connecting ports are arranged on the adjacent surfaces,

the liquid supply pipe is disposed on the adjacent surface side.

7. The endoscope of claim 5 or 6,

the endoscope has:

an operation wire for operating the raising table,

the operation wire is inserted through the liquid supply pipeline, and the end part of the operation wire is connected with the standing table.

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

the endoscope has:

an observation optical system disposed on the partition wall and observing an observation direction orthogonal to a longitudinal axis direction of the insertion portion,

the ejection direction of the ejection port when the rising stand is located at the falling position is a direction having a component of the observation direction.

9. The endoscope of any one of claims 1 to 8,

the endoscope includes a top cover detachably attached to the distal end portion body,

the liquid supply pipeline is provided with a connecting pipeline connected with the outflow port,

the connecting pipeline is arranged on the top cover.

10. The endoscope of claim 9, wherein,

the connection pipe is configured as a through hole formed in the top cover.

11. The endoscope of claim 9 or 10,

the top cover includes a shaft support portion that supports the rotation shaft of the raising table.