JP7097860B2 - Endoscope - Google Patents

Description

The present invention relates to an endoscope, and more particularly to an endoscope capable of sending water in the observation direction from a stand provided at the tip of an insertion portion.

In the endoscope, various treatment tools are introduced from the treatment tool introduction port provided in the hand operation part, and this treatment tool is taken out from the standing table accommodation space opened at the tip of the insertion part for treatment. I am using it. For example, in a duodenal endoscope, a treatment tool such as forceps or a contrast tube is used, and in an ultrasonic endoscope, a treatment tool such as a puncture needle is used. In order to treat a desired position in the subject, such a treatment tool needs to change the derivation direction of the treatment tool to be led out from the standing space.

For example, in the endoscope disclosed in Patent Document 1, an upright stand (also referred to as a treatment tool upright stand) is rotatably provided in the upright stand accommodation space, and the posture of the upright stand is set as the upright position in the hand operation unit. A lever (also referred to as a rise lever) that can be changed between the tilted position and the tilted position is provided. In the upright stand of Patent Document 1, the base end portion on the hand side is rotatably supported by a pin (also referred to as a rotation shaft) on the main body of the tip portion of the insertion portion.

Further, the endoscope disclosed in Patent Document 1 includes a water supply device for removing filth and the like in the observation direction (also referred to as a visual field direction) in addition to the air supply water supply device for cleaning the observation window. I have. This water supply device sends water in the observation direction from the tip opening formed in the standing table, and has a water feeding tube protruding from the main body end face of the tip main body toward the tip side of the insertion portion and standing up. It is provided on a table and has a water supply port to which the tip of the water supply tube is connected and which has the tip opening.

Japanese Unexamined Patent Publication No. 2001-389

By the way, in the endoscope of Patent Document 1, the connection portion between the water supply tube and the upright table is the base end portion on the hand side of the upright table (that is, the side where the rotation axis is arranged in the direction orthogonal to the rotation axis in the upright table). It is provided in. Therefore, in the endoscope of Patent Document 1, when the standing table is rotated from the inverted position to the standing position, the water supply tube is bent at a large angle toward the standing direction of the standing table.

That is, in the endoscope of Patent Document 1, when the standing table is repeatedly rotated, the bent portion of the water supply tube may be damaged due to fatigue. Further, since a load in the pulling direction is also applied to the connection portions at both ends of the water supply tube, the connection portions at both ends may be damaged due to fatigue. For this reason, the endoscope of Patent Document 1 has a problem that the durability of the water feeding device is low.

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

In order to achieve the object of the present invention, the endoscope of the present invention is provided on an insertion portion having a tip and a proximal end, a tip portion main body provided on the tip end side of the insertion portion, and a tip portion main body. A treatment tool outlet formed on the end face of the main body facing the tip side of the insertion portion, a partition wall provided on the tip body and defining the standing table accommodation space facing the treatment tool outlet, and an arrangement in the standing table accommodation space. An upright stand that is rotatably provided between the upright position and the lodging position around the rotation axis, a connection port provided on the stand, and an injection port provided on the stand and communicating with the connection port. , A liquid feed pipeline provided on the tip body and connected to the outlet and the connection port formed on the end surface of the main body, and at least a liquid feed pipeline having a flexible conduit. The connection port is provided in the area of the standing table opposite to the side where the rotation axis is arranged in the direction orthogonal to the rotation axis.

In one embodiment of the present invention, the connection port is provided at a position where the distance between the connection port and the outlet changes with the rotation of the upright stand, and the axial length of the liquid feed pipe line is larger than the maximum value of the distance. It is also preferable that it is long.

In one embodiment of the present invention, it is preferable that the flexible pipeline is formed in a bellows shape that can be expanded and contracted in the axial direction of the flexible pipeline.

In one embodiment of the present invention, the standing table has a treatment tool guide surface for guiding the treatment tool derived from the treatment tool outlet, and a back surface of the standing table arranged on the opposite side of the treatment tool guide surface. It is preferable that a connection port is provided on the back surface of the table and the liquid feed pipe is arranged on the side of the back surface of the standing table.

In one embodiment of the present invention, the standing table normalizes to a treatment tool guide surface that guides the treatment tool derived from the treatment tool outlet and a direction that is connected to the treatment tool guide surface and includes an axial component of the rotation axis. It is preferable that the side surface of the standing table is provided, a connection port is provided on the side surface of the standing table, and the liquid feeding pipeline is arranged on the side surface of the side surface of the standing table.

In one embodiment of the present invention, the standing table has a treatment tool guide surface for guiding the treatment tool derived from the treatment tool outlet, and an adjacent surface adjacent to the treatment tool guide surface and surrounding the treatment tool guide surface. However, it is preferable that a connection port is provided on the adjacent surface and the liquid feed pipe is arranged on the side of the adjacent surface.

It is preferable that one embodiment of the present invention has an operation wire for operating the upright stand, the operation wire is inserted into the liquid feeding pipe line, and the end portion of the operation wire is connected to the upright stand.

One embodiment of the present invention is an observation optical system arranged on a partition wall, which has an observation optical system for observing an observation direction orthogonal to the longitudinal axis direction of the insertion portion, and an upright stand is located at an inverted position. In this case, the injection direction of the injection port is preferably a direction having a component in the observation direction.

One embodiment of the present invention includes a cap that can be detachably attached to the tip body, the liquid feed pipe has a connecting pipe connected to the outlet, and the connecting pipe may be provided in the cap. preferable.

In one embodiment of the present invention, the connecting pipeline is preferably configured as a through hole formed in the cap.

In one embodiment of the present invention, the cap preferably includes a shaft support portion on which the rotation shaft of the upright stand is pivotally supported.

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

Configuration diagram of an endoscope system including an endoscope according to an embodiment Enlarged perspective view of the tip An assembly perspective view showing the configuration of the tip shown in FIG. Perspective view of the tip body as seen from the X (+) side Assembled perspective view of the tip body and the stand A perspective view of the water supply device provided in the tip body as viewed from the X (+) side. Side view of the water supply device shown in FIG. 6 as viewed from the X (+) side. Top view of the stand as seen from the Z (+) side Schematic cross-sectional view of the cap showing the first aspect in which the liquid feed pipe is integrated with the cap. Schematic cross-sectional view of the cap showing the second aspect in which the liquid feed pipe is integrated with the cap. Schematic cross-sectional view of the cap showing the first aspect in which the liquid feed pipe and the upright stand are integrated in the cap. Schematic cross-sectional view of the cap showing the second aspect in which the liquid feed pipe and the upright stand are integrated in the cap. Top view of the water supply device of the second embodiment as viewed from the Z (+) side Side view including a partial cross section of the water supply device shown in FIG. 13 as viewed from the X (+) side. Cross-sectional view of the stand and the water supply device shown in FIG. Side view including a partial cross section of the water supply device of the third embodiment as viewed from the X (+) side. Cross-sectional view of the water supply tube connected to the liquid supply line through the outlet.

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

FIG. 1 is a block 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 unit 22 provided with an standing operation lever 20 and an insertion unit 24 provided on the tip end side of the operation unit 22 and inserted into a subject.

The insertion portion 24 has a longitudinal axis A extending from the proximal end to the distal end, and includes a flexible portion 26, a curved portion 28, and a distal end portion 30 in order from the proximal end toward the distal end. Hereinafter, the schematic configuration of the tip portion 30 will be described.

FIG. 2 is an enlarged perspective view of the tip portion 30. Here, the endoscope 10 shown in FIG. 1 is a lateral endoscope used as, for example, a duodenal endoscope, and the tip portion 30 of FIG. 2 has a configuration in a lateral endoscope.

FIG. 3 is an assembly perspective view showing the configuration of the tip portion 30 shown in FIG. 2. As shown in FIG. 3, the tip portion 30 has a tip portion main body 32 and a cap 34, and is configured by attaching the cap 34 to the tip portion main body 32. The tip portion main body 32 is provided on the tip end side of the insertion portion 24 shown in FIG. 1, and the tip portion main body 32 is provided with an upright stand 36 described later. In addition, in FIG. 2 and FIG. 3, the standing table 36 located at the lodging position is shown.

Further, FIGS. 2 and 3 show various contents arranged inside the insertion portion 24 (see FIG. 1). Specifically, the treatment tool channel 38 that guides the treatment tool (not shown) to the tip body 32, and the standing operation wire 40 (for performing an operation of changing the operation direction of the treatment tool derived from the tip body 32). Hereinafter, it is referred to as a wire 40), an air supply water supply tube 42, and a water supply tube 44. Further, although not shown in FIGS. 2 and 3, an angle wire for performing an operation of changing the bending direction of the bending portion 28 (see FIG. 1), a signal cable for transmitting an image signal, and illumination light are used. Contents such as a light guide to be transmitted are also provided.

Hereinafter, in explaining the configuration of each part, a three-dimensional Cartesian coordinate system of the X-axis, the Y-axis, and the Z-axis will be described. That is, when the tip portion 30 is viewed from the operation portion 22 and the direction in which the treatment tool (not shown) is derived by the standing table 36 is the upward direction, the upward direction is the Z (+) direction and the opposite direction. Let a certain downward direction be the Z (-) direction. Further, the right direction at that time is the X (+) direction, and the left direction is the X (−) direction. Further, the front direction (the direction toward the tip end side of the longitudinal axis A direction of the insertion portion 24) at that time is the Y (+) direction, and the rear direction (the direction toward the proximal end side of the insertion portion 24 in the longitudinal axis A direction) is Y. (-) Direction.

As shown in FIG. 1, the operation unit 22 is configured to have a substantially cylindrical shape as a whole. The operation unit 22 has an operation unit main body 46 in which the standing operation lever 20 is rotatably provided, and a grip portion 48 connected to the operation unit main body 46, and the insertion portion 24 is located on the tip end side of the grip portion 48. The base end portion is connected via the breakage prevention pipe 50. The grip portion 48 is a portion gripped by the operator when operating the endoscope 10.

The operation unit main body 46 is provided with a universal cable 52. A light source connector 54 is provided on the tip end side of the universal cable 52, and the light source connector 54 is connected to the light source device 16. Further, the light source connector 54 is provided with an electric connector 56 branched, and the electric connector 56 is connected to the processor device 14.

Further, the air supply / water supply button 57 and the suction button 59 are arranged side by side on the operation unit main body 46. When the air supply / water supply button 57 is operated by the operator, air or liquid is supplied to the air supply / water supply tube 42 of FIG. An air supply / water supply nozzle 58 for cleaning the observation optical system 76 is provided on the tip end side of the air supply / water supply tube 42, whereby air or liquid is provided from the air supply / water supply nozzle 58 toward the observation optical system 76. Is ejected. The observation optical system 76 will be described later.

The water supply tube 44 is arranged from the insertion portion 24 to the universal cable 52 via the operation portion 22, and the base end of the water supply tube 44 is opened in the light source connector 54 as a connector connection portion (not shown) for a water jet. .. A liquid tank (not shown) is connected to this connector connection portion via a liquid feed pump (not shown). Then, when the liquid feed pump is driven by an electric switch provided separately, the liquid is supplied from the liquid tank to the water feed tube 44 via the connector connection portion. As shown in FIG. 3, the tip of the water supply tube 44 is opened as an outlet 45 in the tip body 32. Therefore, the liquid supplied to the water supply tube 44 is discharged from the outlet 45. The outlet 45 is formed on the end surface 25 of the main body facing the tip end side of the insertion portion 24.

The liquid feeding method using the above liquid feeding pump is an example. For example, a liquid feeding method may be adopted in which the pipe line for water feeding is switched from the air feeding water feeding tube 42 to the water feeding tube 44 by fully pressing the air feeding water feeding button 57.

On the other hand, when the suction button 59 of FIG. 1 is operated by the operator, body fluid such as blood is sucked from the treatment tool outlet 60 provided in the tip body 32 of FIG. 2 via the treatment tool channel 38. .. The treatment tool outlet 60 is also formed on the end face 25 of the main body like the outlet 45.

As shown in FIG. 1, a pair of angle knobs 62, 62 for bending the curved portion 28 are arranged on the operation unit main body 46. The pair of angle knobs 62, 62 are provided coaxially and rotatably.

The standing operation lever 20 is rotatably provided coaxially with the angle knobs 62 and 62. The standing operation lever 20 is rotationally operated by the operator who grips the grip portion 48. When the standing operation lever 20 is rotated, the wire 40 of FIG. 2 is pushed and pulled in conjunction with the rotation operation of the standing operation lever 20. By operating the wire 40 in this way, the posture of the standing table 36 connected to the tip end side of the wire 40 is changed between the lying down position and the standing position (see FIG. 7) in FIG.

As shown in FIG. 1, the grip portion 48 of the operation portion 22 is provided with a treatment tool introduction port 64 for introducing the treatment tool. The treatment tool (not shown) introduced from the treatment tool introduction port 64 with the tip portion at the head is inserted into the treatment tool channel 38 of FIG. 2 and is external from the treatment tool outlet 60 provided in the tip portion main body 32. Derived to.

As shown in FIG. 1, the soft portion 26 of the insertion portion 24 has a spiral tube (not shown) formed by spirally winding a thin metal strip having elasticity. The flexible portion 26 is configured by covering the outside of the spiral tube with a tubular net body woven with a metal wire, and covering the outer peripheral surface of the net body with an outer skin made of resin.

The curved 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 curved portion 28 is configured by covering the outer periphery of the structure with a tubular net body woven with a metal wire, and covering the outer peripheral surface of the mesh body with a rubber tubular outer skin. For example, four angle wires (not shown) are arranged from the curved portion 28 configured in this way to the angle knobs 62 and 62, and these angle wires are generated by the rotation operation of the angle knobs 62 and 62. The curved portion 28 is curved up, down, left and right by the push-pull operation.

As described above, the endoscope 10 of the embodiment configured as described above is a lateral endoscope used as a duodenal endoscope, and the insertion portion 24 is inserted into the subject through the oral cavity. The insertion portion 24 is inserted from the esophagus through the stomach to the duodenum, and a predetermined examination or treatment is performed. The treatment tools used in the endoscope 10 include biopsy forceps having a cup capable of collecting biological tissue at the tip, a knife for EST (Endoscopic Sphincterotomy), a contrast tube, and the like. The treatment tool of can be exemplified.

Next, the detailed structure of the tip portion 30 will be described in detail with reference to FIGS. 2 and 3.

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

The cap 34 is formed of a substantially cylindrical body whose tip end side is sealed and whose base end side is open, and a substantially rectangular opening window 34A is provided on a part of the outer peripheral surface thereof. As shown in FIG. 2, when the cap 34 is attached to the tip body 32, the opening window 34A is arranged in the Z (+) direction, which is a direction orthogonal to the longitudinal axis A direction. As a result, the treatment tool outlet 60 is communicated with the opening window 34A via the standing table accommodating space 66 provided in the tip main body 32. The standing space 66 will be described later.

Further, the cap 34 is made of an elastic material, for example, a rubber material such as fluororubber or silicon rubber, or a resin material such as polysulfon or polycarbonate. When the treatment of the endoscope 10 is completed, the cap 34 is removed from the tip main body 32 and cleaned and disinfected, or is discarded as disposable.

As shown in FIG. 3, the tip main body 32 has a pair of partition walls 68 and 70 projecting toward the Y (+) side, and these partition walls 68 and 70 face each other in the X-axis direction. Are arranged. Further, between the partition wall 68 and the partition wall 70, the above-mentioned upright stand accommodating space 66 for accommodating the upright stand 36 is provided. The upright storage space 66 faces the treatment tool outlet 60 and is defined by the partition walls 68 and 70. The standing table accommodating space 66 is opened in the Z (+) direction and the Z (−) direction orthogonal to the longitudinal axis A direction.

On the upper surface 68A on the Z (+) side of the partition wall 68, an illumination optical system 74 having an illumination window and an observation optical system 76 having an observation window are arranged adjacent to each other in the Y-axis direction. The observation optical system 76 makes it possible to observe a subject in the observation direction. The observation direction refers to the Z (+) direction in which the standing table accommodating space 66 opens, out of the directions orthogonal to the longitudinal axis A direction of the insertion portion 24 (see FIG. 1). Further, the above-mentioned air supply / water supply nozzle 58 is provided on the tip main body 32 toward the observation optical system 76, and the observation optical system 76 is washed and dried by air and liquid ejected from the air supply / water supply nozzle 58. Will be done.

A storage chamber 72 is provided inside the partition wall 68. A lighting unit (not shown) is housed in the storage room 72. The lighting unit includes a light guide (not shown) arranged on the accommodation chamber 72 side of the illumination optical system 74. The light guide is arranged from the insertion portion 24 of the endoscope 10 (see FIG. 1) to the universal cable 52 via the operation portion 22, and its base end is connected to the light source connector 54. Therefore, when the light source connector 54 is connected to the light source device 16, the irradiation light from the light source device 16 is transmitted to the illumination optical system 74 via the light guide, and is irradiated from the illumination optical system 74 toward the above observation direction. Will be done.

Further, a photographing unit (not shown) is housed in the storage room 72. The photographing unit includes a CMOS (complementary metal oxide semiconductor) type or CCD (charge coupled device) type image pickup element (not shown) arranged on the accommodation chamber 72 side of the observation optical system 76. A subject image is formed on the image plane of the image sensor by an image lens (not shown) constituting the observation optical system 76. The tip of a signal cable (not shown) is connected to this image pickup device, and the signal cable is arranged from the insertion portion 24 of the endoscope 10 (see FIG. 1) to the universal cable 52 via the operation portion 22. The base end is connected to the electrical connector 56. Therefore, when the electric connector 56 is connected to the processor device 14, the image pickup signal of the subject image obtained by the photographing unit is transmitted to the processor device 14 via the signal cable. Then, the image pickup signal is image-processed by the processor device 14, and then displayed as a subject image on the display 18.

Next, the configuration of the standing table 36 will be described with reference to FIGS. 4 and 5.

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

An upright lever accommodating chamber 78 is provided on the X (+) side side surface of the partition wall 70, and the upright lever 80 is accommodated in the upright lever accommodating chamber 78. The standing lever accommodating chamber 78 is configured in a fan-shaped concave shape, and is covered with a protective plate (not shown) and sealed. Further, a through hole 82 for arranging the wire 40 through the side surface 78A on the Y (−) side of the standing lever accommodating chamber 78 is provided along the Y-axis direction. The tip of the wire 40 is inserted through the through hole 82 and fixed to the lever portion 80A of the standing lever 80.

Further, as shown in FIG. 5, the partition wall 70 is provided with a through hole 84 that communicates the standing lever accommodating chamber 78 and the erecting platform accommodating space 66 along the X-axis direction. The rotary shaft 86 of the upright lever 80 is arranged so as to penetrate through the through hole 84, and the rotary shaft 86 is rotatably supported by the through hole 84. The tip end portion of the rotary shaft 86 penetrating the through hole 84 is fitted into the hole 88 provided in the base end portion 36A of the upright stand 36. As a result, the upright lever 80 and the upright stand 36 are connected via the rotation shaft 86.

According to the upright stand 36 configured as described above, when the wire 40 is pushed and pulled by the upright operation lever 20 (see FIG. 1), the rotation shaft 86 is rotated together with the upright lever 80, so that the upright stand 36 Is rotated about the rotation axis 86 between the lodging position (see FIG. 4) and the standing position (see FIG. 7). By such a rotational operation of the upright table 36, the out-out direction of the treatment tool led out from the treatment tool out-out port 60 to the upright table accommodation space 66 is changed. An O-ring (not shown) is arranged between the rotating shaft 86 and the through hole 84 to prevent gas and liquid from entering each other between the standing table accommodating space 66 and the erecting lever accommodating chamber 78.

Next, the water supply device 90 of the first embodiment for injecting a liquid from the standing table 36 will be described with reference to FIGS. 6 and 7.

FIG. 6 is a perspective view of the water supply device 90 provided in the tip main body 32 as viewed from the X (+) side, before the connection pipe line 92, which is a part of the water supply device 90, is connected to the outlet 45. The state of is shown. Note that FIG. 6 is a view in which the partition wall 70 (see FIG. 4) is omitted, and shows the standing table 36 in a prone position.

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 connecting pipe line 92 is connected to the outlet 45. Note that FIG. 7 shows an upright stand 36 in an upright posture.

The water supply device 90 is different from the cleaning device that cleans the observation optical system 76 with the liquid jetted from the air supply / water supply nozzle 58, for spraying the liquid toward the filth or the like in the observation direction and removing the filth or the like. It is a device.

As shown in FIGS. 6 and 7, the water supply device 90 includes the above-mentioned liquid supply pump (not shown), a water supply tube 44, an outlet 45, a connection port 94, an injection port 96, and a liquid supply pipe. It has a road 98. Since the liquid feed pump, the water feed tube 44, and the outlet 45 have already been described, the description thereof will be omitted here.

The connection port 94 is provided on the upright stand 36. Specifically, the connection port 94 is the tip end portion 36B of the upright stand 36, and is provided on the back surface 36D of the upright stand 36. Here, the tip portion 36B of the standing table 36 is a portion existing in a region opposite to the rotating shaft 86 in a direction orthogonal to the axis 86A of the rotating shaft 86. On the opposite side of the back surface 36D of the standing table, a treatment tool guide surface 36C (see FIG. 6) for guiding the treatment tool derived from the treatment tool outlet 60 (see FIG. 2) is provided.

The injection port 96 is provided at the tip portion 36B of the standing table 36, similarly to the connection port 94. Further, the injection port 96 is opened in the tip surface 36E connected to the treatment tool guide surface 36C and the standing table back surface 36D. In the tip surface 36E, the normal line B of the tip surface 36E is Z (see FIG. 6) even when the posture of the standing table 36 is changed between the lying position (see FIG. 6) and the standing position (see FIG. 7). It is configured to have a component in the +) direction. As a result, the injection direction of the injection port 96 is set to have a component in the observation direction of the observation optical system 76 (see FIG. 2) even when the upright stand 36 is located in the inverted position. The injection port 96 configured in this way is communicated with the connection port 94 via a communication passage 97 provided inside the tip portion 36B.

The liquid feed pipe line 98 is a pipe line connecting between the outlet 45 and the connection port 94, and has a flexible pipe line 100 in addition to the connection pipe line 92 described above. According to FIG. 7, the base end portion 92A of the connecting pipe line 92 is connected to the outlet 45, the tip end portion 92B of the connecting pipe line 92 is connected to the base end portion 100A of the flexible pipe line 100, and the flexible pipe line 100 is connected. The tip portion 100B is connected to the connection port 94.

The connection portion 102 between the connection pipe line 92 and the flexible pipe line 100 is arranged on the Z (+) side and the Y (+) side with respect to the rotation shaft 86, and the base end portion 36A of the upright stand 36. It is arranged on the X (+) side with respect to. As a result, the flexible pipeline 100 is pulled out from the connection portion 102 to the X (−) side and arranged on the side of the back surface 36D of the upright stand, and the tip portion 100B thereof is connected to the connection port 94.

On the other hand, the outlet 45 is provided at a position shifted to the Y (−) side on the Z (+) side with respect to the rotation shaft 86. As a result, the connection port 94 is provided at a position where the distance between the connection port and the outlet 45 changes as the standing table 36 rotates. Specifically, the connection port 94 is provided at a position where the maximum distance between the upright stand 36 and the outlet 45 is the maximum when the upright stand 36 is located at the inverted position (see FIG. 4), and the upright stand 36 stands up. It is provided at a position where the distance from the outlet 45 is the minimum value when it is located at the position (see FIG. 7).

That is, when the axis 86A and the outlet 45 of the rotating shaft 86 are projected onto the paper surface of FIG. 7, the outlet 45 is on the Z (+) side with respect to the axis 86A and is eccentric to the Y (−) side. Because it is in the above position, there is a difference in distance as described above. In consideration of such a difference in distance, the axial length of the liquid feed pipe line 98 is set to be longer than the maximum value of the above distance. As a result, even when the standing table 36 is rotated between the inverted position and the standing position, the liquid feeding pipe line 98 is maintained in a state where an extra length is generated.

In this example, as the flexible pipe line 100, a flexible tube made of a soft resin material such as PTFE (Poly Tetra Fluoro Ethylene) is exemplified, but the flexible pipe line 100 has a bellows shape that can be expanded and contracted in the axial direction. A tube configured in may be adopted. Further, as the connecting pipe line 92, a straight pipe made of an acrylic resin material harder than the flexible pipe line 100 is exemplified, but a flexible tube or a bellows-shaped tube is adopted as in the flexible pipe line 100. May be good.

Next, the operation of the water supply device 90 of the first embodiment will be described.

By driving the liquid feed pump, the liquid supplied to the water feed tube 44 (see FIG. 3) flows into the connecting pipe line 92 from the outlet 45 of FIG. Then, the liquid is guided from the connecting pipe line 92 through the flexible pipe line 100 to the connecting port 94, and then passes through the connecting passage 97 and is ejected from the injection port 96 in the observation direction. This makes it possible to remove filth and the like located in the observation direction. Then, when it is desired to change the injection direction of the liquid, the standing table 36 is rotated between the standing position and the lying position. Thereby, the injection direction of the liquid can be changed according to the rotation position of the standing table 36.

Since the connection port 94 provided in the upright table 36 is provided at the tip portion 36B of the upright table 36, even when the upright table 36 is rotated from the inverted position to the upright position, the flexible pipeline 100 can be connected. It curves gently starting from the connection portion 102. As a result, the flexible pipeline 100 is less likely to have a bent portion, so that the durability of the flexible pipeline 100, that is, the durability of the water supply device 90 can be improved.

On the other hand, in the endoscope disclosed in US Pat. Since it is provided on the side to be used), if the treatment tool raising table is repeatedly rotated, there is a risk that the bent part of the water supply tube will be damaged due to fatigue, or the connection parts at both ends of the water supply tube will be damaged due to fatigue. be.

On the other hand, according to the endoscope 10 of the embodiment, the connection port 94, which is the connection portion between the liquid feed pipe line 98 and the upright stand 36, is the tip portion 36B of the upright stand 36 (that is, the rotation shaft in the upright stand 36). Since it is provided in the area on the side opposite to the side where the rotation axis is arranged in the direction orthogonal to Therefore, the durability of the water supply device 90 can be improved.

Further, according to the endoscope 10 of the embodiment, even if the distance between the outlet 45 and the connection port 94 changes with the rotation of the standing table 36, the maximum value of the distance (in this example, the standing table 36). Since the liquid feed line 98 is configured to be longer than the distance between the outflow port 45 and the connection port 94 when the No pulling force acts on. Thereby, the durability of the liquid feed pipe line 98 can be further improved.

Further, according to the endoscope 10 of the embodiment, since the connection port 94 is provided on the back surface 36D of the upright table 36 and the flexible pipe line 100 is arranged on the side of the back surface 36D of the upright table, the treatment tool guide surface 36C is provided. It is possible to prevent the guided treatment tool from interfering with the flexible conduit 100. This makes it possible to prevent damage to the flexible conduit 100 due to interference with the treatment tool.

Further, according to the endoscope 10 of the embodiment, since the injection direction of the injection port 96 when the upright table 36 is located at the inverted position is the direction having the component of the observation direction of the observation optical system 76, the upright table Even when the 36 is positioned in the lodging position, the liquid can be ejected in the observation direction.

In the endoscope 10 of the embodiment, the embodiment in which the liquid feeding pipe line 98 is configured by the connecting pipe line 92 and the flexible pipe line 100 has been described, but the flexible pipe line 100 is not used. The base end portion 100A of the above may be directly connected to the outlet 45.

Here, the arrangement position of the injection port 96 with respect to the standing table 36 will be described with reference to FIG. FIG. 8 is a top view of the standing table 36 as viewed from the Z (+) side.

In the water supply device 90 of the first embodiment, the injection port 96 is opened in the tip surface 36E formed on the Y (+) side with respect to the treatment tool guide surface 36C, but the opening position of the injection port 96 is limited to this position. It is not something that will be done. For example, the injection port 96 may be opened in the upper right upper surface 36F formed on the X (+) side or the upper left surface 36G formed on the X (−) side with respect to the treatment tool guide surface 36C.

However, in an endoscope in which the tip 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 in the right upper surface 36F, the space of the right upper surface 36F has to be widened. As a result, the diameter of the tip portion 30 of the insertion portion 24 may increase. Further, when the injection port 96 is opened in the upper left surface 36G, the treatment tool having a bending habit may interfere with the injection direction of the injection port 96. Therefore, from the viewpoint of reducing the diameter of the tip portion 30 and preventing the liquid jetted from the injection port 96 from interfering with the treatment tool, the injection port is provided on the tip surface 36E as in the water supply device 90 of the first embodiment. It is preferable to open 96. As will be described later, the upper right upper surface 36F and the upper left surface 36G correspond to adjacent surfaces adjacent to the treatment tool guide surface 36C and surrounding the treatment tool guide surface 36C.

FIG. 9 is a schematic cross-sectional view of the cap 34 showing the first aspect in which the liquid feed pipe line 98 is integrated with the cap 34.

In the connecting pipe 92 of the liquid feeding pipe 98 shown in FIG. 9, the base end 92A of the connecting pipe 92 is connected to the outlet 45 when the cap 34 is attached to the tip main body 32 (see FIG. 3). It is provided on the cap 34 at the position where it is to be. Therefore, the base end portion 92A of the connection pipeline 92 can be connected to the outlet 45 simply by attaching the cap 34 to the tip portion main body 32. As a result, it is possible to eliminate the trouble of manually connecting the base end portion 92A of the connecting pipe line 92 to the outlet 45. The mode in which the connecting pipe line 92 is provided in the cap 34 includes, for example, a mode in which the connecting pipe line 92 is fixed to the cap 34 with an adhesive, and a mode in which the connecting pipe line 92 is integrally molded with the cap 34. can.

FIG. 10 is a schematic cross-sectional view of the cap 34 showing the second aspect in which the liquid feed pipe line 98 is integrated with the cap 34.

The connecting pipe line 92 of the liquid feeding pipe line 98 shown in FIG. 10 is configured as a through hole 104 formed in the cap 34. The connection pipeline 92 is formed in the cap 34 at a position where the base end portion 92A of the connection pipeline 92 is connected to the outlet 45 when the cap 34 is attached to the tip portion main body 32. Therefore, the base end portion 92A of the connection pipeline 92 can be connected to the outlet 45 simply by attaching the cap 34 to the tip portion main body 32. As a result, it is possible to eliminate the trouble of manually connecting the base end portion 92A of the connecting pipe line 92 to the outlet 45.

Further, as shown in FIGS. 9 and 10, by integrating the liquid feeding pipe line 98 with the cap 34, the liquid feeding pipe line 98 can be removed together with the cap 34 from the tip main body 32. .. This makes it possible to improve the detergency of the tip body 32. Further, the liquid feed pipe line 98 can be cleaned, disinfected, or discarded together with the cap 34.

FIG. 11 is a schematic cross-sectional view of the cap 34 showing the first aspect in which the liquid feed pipe line 98 and the upright stand 36 are integrated with the cap 34. In explaining the embodiment of FIG. 11, the members that are the same as or similar to those of the embodiment shown in FIG. 9 will be described with the same reference numerals.

The cap 34 shown in FIG. 11 is provided with a convex shaft support 106 on the inner peripheral surface of the cap 34, and the rotation shaft 86 of the upright stand 36 is pivotally supported by the shaft support 106. Further, the liquid feeding pipe line 98 is integrated with the cap 34 as shown in FIG. 9, and the tip portion 100B of the flexible pipe line 100 is connected to the connection port 94 of the upright stand 36.

According to the aspect of FIG. 11 configured in this way, simply by attaching the cap 34 to the tip body 32, the connection port 94 of the upright stand 36 is connected to the outlet 45 of the tip body 32, and the liquid feed pipe line 98. Can be connected via.

FIG. 12 is a schematic cross-sectional view of the cap 34 showing the second aspect in which the liquid feed pipe line 98 and the upright stand 36 are integrated with the cap 34. In explaining the embodiment of FIG. 12, the members that are the same as or similar to the embodiment shown in FIG. 10 will be described with the same reference numerals.

The cap 34 shown in FIG. 12 is provided with a convex shaft support 106 on the inner peripheral surface of the cap 34, and the rotation shaft 86 of the upright stand 36 is pivotally supported by the shaft support 106. Further, the cap 34 and the liquid feed pipe line 98 are integrated as shown in FIG. 10, and the tip portion 100B of the flexible pipe line 100 is connected to the connection port 94 of the upright stand 36.

According to the aspect of FIG. 12 configured in this way, simply by attaching the cap 34 to the tip body 32, the connection port 94 of the upright stand 36 is connected to the outlet 45 of the tip body 32, and the liquid feed pipe line 98. Can be connected via.

Further, as shown in FIGS. 11 and 12, by integrating the liquid feed pipe line 98 and the upright stand 36 into the cap 34, the liquid feed pipe line 98 and the upright stand 36 are brought to the tip together with the cap 34. It can be removed together from the main body 32. This makes it possible to improve the detergency of the tip body 32. Further, the liquid feeding pipe line 98 and the standing table 36 can be cleaned, disinfected, or discarded together with the cap 34.

In the endoscope having the cap 34 shown in FIGS. 11 and 12, the tip portion 40A of the wire 40 (see FIG. 8) is directly connected to the upright stand 36, and the tip portion 40A of the wire 40 is connected. Is connected to the right upper surface 36F shown in FIG. 8 as an example.

Next, the water supply device 110 of the second embodiment will be described with reference to FIGS. 13, 14, and 15.

FIG. 13 is a top view of the water supply device 110 as viewed from the Z (+) side. FIG. 14 is a cross-sectional view taken along the 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 cross-sectional view of the standing table 36 and the water supply device 110.

As shown in FIGS. 13 to 15, the standing table 36 has an standing table side surface 36H connected to the treatment tool guide surface 36C. The normal line C is the direction including the component in the axial direction (X (+) direction) of the rotating shaft 86 in the standing table side surface 36H. A connection port 94 is provided on the front end side surface 36J formed on the tip end portion 36B of the upright stand side surface 36H. The connection port 94 is communicated with the injection port 96 via a communication passage 97.

The tip portion 112B of the liquid feed pipe line 112 is adhered and connected to the connection port 94, and the base end portion 112A of the liquid feed pipe line 112 is adhered to the outlet 45. As a result, the liquid feed pipe line 112 is arranged on the side of the upright table side surface 36H. Further, the liquid feed pipe line 112 is configured in a bellows shape that can be expanded and contracted in the axial direction. Therefore, according to the liquid feed pipe line 112, the connection port 94 is extended at the time of lodging when the connection port 94 is most distant from the outflow port 45, and the connection port 94 is closest to the outflow port 45 at the time of standing up (not shown). ) Is shrunk.

On the other hand, a wire 40 for rotating the standing table 35 is inserted inside the liquid feeding pipe line 112. As shown in FIG. 15, the tip portion 40A of the wire 40 is inserted into the communication passage 97 from the connection port 94 and fixed to the stopper 114 that seals the opening 97A of the communication passage 97. As a result, the tip portion 40A of the wire 40 is connected to the upright stand 36.

According to the water supply device 110 of the second embodiment configured in this way, by inserting and arranging the wire 40 in the liquid supply pipe line 112, the wire 40 protruding from the tip portion main body 32 to the tip side is sent to the liquid feed pipe. It can be protected by the road 112.

Next, the water supply device 120 of the third embodiment will be described with reference to FIG. In explaining the water supply device 120, members that are the same as or similar to the water supply device 110 shown in FIGS. 13 to 15 will be described with the same reference numerals.

The upright stand 36 shown in FIG. 16 connects the tip portion 112B of the liquid feed pipe line 112 to the connection port 94 provided on the right upper surface 36F (see FIG. 8), and the wire 40 is connected to the inside of the liquid supply pipe line 112. It is being inserted. In this water supply device 120, the liquid supply pipe line 112 is arranged on the right upper surface 36F side. Further, the tip portion 40A of the wire 40 is inserted into the communication passage 97 from the connection port 94 and fixed to the plug 114 that seals the opening 97A of the communication passage 97.

Even in the water supply device 120 of the third embodiment configured in this way, by inserting and arranging the wire 40 in the liquid supply pipe line 112, the wire 40 protruding from the tip portion main body 32 to the tip side is fed. It can be protected by the conduit 112.

Further, according to the water supply device 120 of the third embodiment, since the wire 40 is inserted through the connection port 94, the connection portion between the connection port 94 and the tip portion 40A of the wire 40 is connected to the right upper surface 36F (see FIG. 8). The space on the upper right upper surface 36F can be saved as compared with the separately provided standing table 36. As a result, the standing table 36 can be miniaturized, so that the tip portion 30 can be miniaturized. The connection port 94 may be provided on the upper left surface 36G (see FIG. 8).

Further, the liquid feeding pipe line 112 shown in FIGS. 13 to 16 may also be integrated with the cap 34 in the same manner as in the liquid feeding pipe line 98 shown in FIGS. 9 and 10. Further, it may be connected to the upright stand 36 integrated with the cap 34 as in the liquid feeding pipe line 98 shown in FIGS. 11 and 12.

FIG. 17 is a cross-sectional view of a water supply tube 44 connected to the liquid supply line 112 via an outlet 45.

As shown in FIG. 17, the wire 40 is inserted through the water supply tube 44. The water supply tube 44 is branched inside the operation unit 22, the wire 40 is inserted and arranged in the branch pipeline 122, and the base end portion 40B of the wire 40 is connected to the standing operation lever 20 via the standing operation mechanism 124. It is connected.

An O-ring 126 is arranged between the wire 40 and the branch pipe line 122 to prevent the liquid in the water supply tube 44 from leaking from the branch line line 122 to the inside of the operation unit 22. With such a structure, the wire 40 can be pushed and pulled by the standing operation lever 20, and the liquid can be supplied to the liquid feeding pipe line 112.

Although the present invention has been described above, the present invention is not limited to the above examples, and it goes without saying that various improvements and modifications may be made without departing from the gist of the present invention.

10 Endoscope 12 Endoscope system 14 Processor device 16 Light source device 18 Display 20 Standing operation lever 22 Operation part 24 Insertion part 25 Main body end face 26 Flexible part 28 Curved part 30 Tip part 32 Tip part main body 34 Cap 34A Opening window 36 Standing Base 36A Base 36B Tip 36C Treatment tool guide surface 36D Standing table back 36E Tip surface 36F Right upper surface 36G Left upper surface 36H Standing table side surface 36J Tip side 38 Treatment tool channel 40 Standing operation wire 40A Tip 40B Base end 42 Air water supply tube 44 Water supply tube 45 Outlet 46 Operation unit main body 48 Grip part 50 Folding pipe 52 Universal cable 54 Light source connector 56 Electric connector 57 Air supply water supply button 58 Air supply water supply nozzle 59 Suction button 60 Treatment tool outlet 62 Angle knob 64 Treatment tool introduction port 66 Standing table storage space 68 Standing table storage space 68 Partition 68A Top surface 70 Partition 72 Storage chamber 74 Illumination optical system 76 Observation optical system 78 Standing lever storage chamber 78A Side surface 80 Standing lever 80A Lever part 82 Through hole 84 Through hole 86 Rotating shaft 86A Axis 88 Hole 90 Water supply device 92 Connection pipe 92A Base end 92B Tip 94 Connection port 96 Injection port 97 Communication passage 97A Opening 98 Liquid supply pipe 100 Flexible pipe 100A Base 100B Tip 102 Connection 104 Penetration Hole 106 Shaft branch 110 Water supply device 112 Liquid supply line 112A Base end 112B Tip 114 Plug 120 Water supply device 122 Branch line 124 Standing operation mechanism 126 O-ring A Long axis B Normal line C Normal line

Claims (11)

An insertion part having a tip and a base,
The tip body provided on the tip side of the insertion portion and the tip body
A treatment tool outlet provided on the tip body and formed on the end face of the body facing the tip side of the insertion portion, and a treatment tool outlet.
A partition wall provided on the tip body and defining an upright stand accommodating space facing the treatment tool outlet,
An upright stand arranged in the upright stand accommodation space and rotatably provided between an upright position and an inverted position around a rotation axis,
The connection port provided on the stand and
An injection port provided on the stand and communicating with the connection port,
An outlet provided on the tip body and formed on the end face of the body,
A liquid feed pipe connecting between the outlet and the connection port, comprising at least a liquid feed pipe having a flexible pipe.
The connection port is an endoscope provided in a region of the upright table in a direction orthogonal to the rotation axis and opposite to the side on which the rotation axis is arranged. The connection port is provided at a position where the distance between the connection port and the outlet changes with the rotation of the stand.
The axial length of the liquid feed line is longer than the maximum value of the distance.
The endoscope according to claim 1. The flexible pipeline is configured in a bellows shape that can be expanded and contracted in the axial direction of the flexible pipeline.
The endoscope according to claim 1. The standing table has a treatment tool guide surface for guiding the treatment tool derived from the treatment tool outlet, and a back surface of the standing table arranged on the opposite side of the treatment tool guide surface.
The connection port is provided on the back surface of the stand, and the connection port is provided.
The liquid delivery pipe is arranged on the side of the back surface of the stand.
The endoscope according to claim 2. The standing table is normal with a treatment tool guide surface that guides the treatment tool derived from the treatment tool outlet and a direction that is connected to the treatment tool guide surface and includes an axial component of the rotation axis. Has a table side and
The connection port is provided on the side surface of the stand, and the connection port is provided.
The liquid delivery pipe is arranged on the side surface of the upright stand.
The endoscope according to claim 3. The standing table has a treatment tool guide surface for guiding the treatment tool derived from the treatment tool outlet, and an adjacent surface adjacent to the treatment tool guide surface and surrounding the treatment tool guide surface.
The connection port is provided on the adjacent surface, and the connection port is provided.
The liquid delivery line is arranged on the side of the adjacent surface.
The endoscope according to claim 3. It has an operation wire for operating the stand.
The operation wire is inserted into the liquid delivery line, and the end portion of the operation wire is connected to the upright stand.
The endoscope according to claim 5 or 6. An observation optical system arranged on the partition wall, which has an observation optical system for observing an observation direction orthogonal to the longitudinal axis direction of the insertion portion.
The injection direction of the injection port when the upright stand is located at the lodging position is a direction having a component in the observation direction.
The endoscope according to any one of claims 1 to 7. Equipped with a cap that can be detachably attached to the tip body
The liquid delivery line has a connecting line connected to the outlet and has a connecting line.
The connecting line is provided in the cap.
The endoscope according to any one of claims 1 to 8. The connecting pipeline is configured as a through hole formed in the cap.
The endoscope according to claim 9. The cap comprises a shaft support to which the rotating shaft of the standing table is pivotally supported.
The endoscope according to claim 9 or 10.

Images