JP2000116598A - Endoscopic instrument - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an endoscopic instrument equipped with a treatment tool rising table capable of projecting out a treatment tool in any direction between the first direction stretching along the axis in the inserting direction and the second direction different therefrom without curving the curving part of endoscope and allowing observation and treatment without curving operation even in a narrow pipe cavity. SOLUTION: A forefront hard part 1 of an endoscopic instrument is equipped with an objective lens 5 for viewing ahead for imaging in the first direction view field stretching in the inserting direction, an objective lens 9 for viewing sideways for imaging in the lateral view field as the second direction different from the first, and a treatment tool rising table 17 capable of projecting out a treatment tool in any direction between ahead and sideways. The table 17 is equipped with a multi-joint part 15 to whose forefront an operating wire 21 is connected and whose base bottom part is connected rotatably with the forefront hard part 1, and the multi-joint part 15 bends in compliance with the towing amount of the wire 21, and thereby the treatment tool pushed by the multi-joint part 15 can make a rise in any direction between the first and second directions.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of an endoscope apparatus having a forceps channel through which a treatment tool for performing treatment inside a body cavity is inserted.

[0002]

2. Description of the Related Art Conventional endoscope devices are classified into three types according to the direction of a visual field for observing the inside of a body cavity. It is classified into a sight and a strabismus having a viewing direction intermediate between the two.

FIG. 9 is an external view of a conventional endoscope apparatus, and FIG.
Is a cross-sectional view illustrating the main structure of a conventional endoscope,
FIG. 11 is a perspective view of a rigid distal end portion of a conventional side-view endoscope provided with a treatment tool stand, and FIG. 12 is a partially exploded plan view showing a configuration of a treatment tool operation section of a conventional endoscope.

[0004] As shown in the above figure, a conventional endoscope apparatus 101 comprises an endoscope main body 103 and an endoscope scope 105 connected thereto. The endoscope 105 is configured by connecting a guiding tube 109 inserted into a body cavity to an operation unit 107 that can be gripped and operated by an operator. The distal end of the guiding tube 109 is connected to a bending portion 111 that can be bent at a desired angle in the vertical and horizontal directions. Further, the distal end thereof has an objective lens 115, an illumination lens 117 that can observe the inside of a body cavity, and an air supply. Water supply nozzle 119, treatment tool injection port 1
21 and the tip rigid portion 1 containing the treatment tool stand 123
13 are provided.

The objective lens 115 forms an optical image in the body cavity on a solid-state image pickup device (hereinafter, referred to as a CCD) provided in the rigid distal end portion 113. The CCD signal, power supply line, etc.
3, a CCD that reaches the connector 127 through the guiding tube 109, the operation unit 107, and the universal cord 125.
The endoscope main body 103 is connected to the endoscope main body 103 via a cable 129, performs predetermined process processing on the image pickup symbols of the CCD, and displays the symbols on the monitor 201.

The air / water nozzles 119 are respectively connected to air / water pipes 131 housed in the pipes 109. The air supply / water supply pipe 131 is connected to the air supply pipe 133 and the water supply pipe 135 guided from the endoscope main body 103 via the connection part 137 inside the operation unit 107, and is attached to the endoscope main body 103. Water bottle 203
Air and water supplied from the pump are pumped to the rigid part 1
13 to clean the objective lens 115 and as one of the functions for securing a visual field.

[0007] The illumination lens 117 is connected to the universal cord 12 by a light source device mounted in the endoscope main body 103.
5, connected to an optical fiber 139 guided through the operation unit 107 and the guiding tube 109, and illuminates the inside of the body cavity with light guided through the optical fiber 139. .

[0008] The treatment tool ejection port 121 is connected to a forceps channel 141 housed in the guiding tube 109, and the forceps channel 141 is connected to a three-way tube 143 provided in the operation unit 107. . This three-way tube 143
Are the suction tool base 12 of the connector part connected to the treatment tool insertion port 145 of the operation unit 107 and the suction channel of the endoscope main body.
7a, and 3 leading to the treatment tool injection port 121 of the tip rigid portion
The ducts are connected to each other, and the forceps inserted through the treatment instrument insertion port 145 is guided to the treatment instrument ejection port of the distal end hard portion.

[0009] Further, dirt, tissue, and the like in the body cavity can be sucked. The sucked dirt, tissue, and the like are taken into the external suction device via the main body of the endoscope via the guiding tube 109, the three-way tube 143, and the universal cord 125.

Further, a curved portion 111 is provided in the guiding tube 109.
One end of a pair of bending wires 147 for allowing the user to bend at a desired angle is connected to a pulley wire 151 extending from a pulley 149 interlocking with an operation knob (not shown), and is operated by operating the operation knob. Part 1
11 can be bent to a desired angle.

The mechanism for erecting the treatment instrument includes a rigid distal end portion 1.
The treatment instrument upright table 123 provided rotatably with respect to
A treatment tool operation unit 155 provided in the operation unit 107;
Further, an operation wire 159 for connecting the treatment instrument standing table 123 and the treatment instrument operation section 155 is provided. One end of an operation wire 159 is fixed to a distal end portion of the treatment instrument stand 123, and the other end is a piston 157 provided in the treatment instrument operation section 155.
It is fixed to the front end.

The treatment instrument operation section 155 includes an operation lever 163 for moving the treatment instrument up and down, and a rod 1 having one end rotatably connected to a pin 181 of the operation lever 163 as a fulcrum.
67, and the other end of the rod 167 is attached to the bracket 165.
The piston 157 is attached to the rear end of the piston 157 via a cylinder.

The rigid distal end portion 113 is provided with a U-groove 171 extending in the same direction as the insertion direction, and the bottom portion of the U-groove 171 is rotatably connected to the base portion 123b of the treatment instrument stand 123. . A treatment tool ejection port 121 for projecting a treatment tool (not shown) such as forceps is provided on the side surface of the distal end rigid portion forming the rear end of the U-shaped groove 171. The tool can be protruded.

The treatment instrument stand 123 is generally formed of the base 12.
3b to the distal end portion 123a, the gutter shape is upwardly curved, and the operation wire 159 is pulled by the rotation operation of the operation lever 163, and the distal end portion 12 of the treatment instrument standing table 123
3a is pulled, so that the treatment instrument standing table 123 stands up around the base 123b. The treatment instrument is pushed up from below by the erecting operation of the treatment instrument erecting base 123, and stands up. Conversely, when the operation wire 159 is pushed out, the standing treatment tool standing table 123 is stored in the U groove 171 and the treatment tool is stored.

The directions in which these conventional endoscopes can be treated coincide with the direction of the field of view. When the directions deviate from the field of view, the curved portion is bent, and the distal end is positioned within the observable field of view to perform the treatment. I was

Further, a pipe branched from the water supply pipe 135 is connected to the treatment tool operation section 155, and an operation wire 159 is provided.
In some cases, water is supplied using the space between the operation wire 159 and the operation pipe 173 around the operation wire 159, and the operation wire 159 can be washed.

[0017]

However, in the above-mentioned conventional endoscope apparatus, it is difficult to perform the bending operation of the insertion portion depending on a part in a narrow body cavity, and the bending end portion is operated in a view that can be treated. There was a problem that it was often difficult to bring the department. In colorectal examination, etc.,
Even if the observation field angle of the objective optical system becomes large, there has been a problem that great care must be taken so as not to overlook the lesioned part in observing the concave part of the intestinal tract having a bellows shape.

Further, in the above-mentioned conventional endoscope apparatus, since the water supply pipe is simply branched for cleaning the cleaning nozzle of the objective optical system and the operation wire of the treatment tool stand, the water supply operation is performed. The water flow is always distributed between the cleaning nozzle of the objective optical system and the cleaning of the operation wire, and the power of water for cleaning the objective optical system is weak. There was a problem that it required.

The present invention has been made in view of the above-mentioned problems, and does not perform a bending operation of a bending portion of an endoscope. Endoscope provided with a treatment tool stand that can eject a treatment tool in an arbitrary direction between the second direction different from the axis, so that observation and treatment can be performed without bending operation even in a narrow lumen. It is intended to provide a mirror device. In addition, the present invention, when not using a treatment tool, ensure a sufficient amount of water supply to the objective optical system,
An object of the present invention is to perform reliable washing in a short time and quickly secure a view.

[0020]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a field of view in a first direction along an insertion direction of an insertion portion inserted into a body cavity of a subject; In an endoscope apparatus provided with a visual field in a second direction different from the direction, a treatment tool standing table capable of ejecting a treatment tool in an arbitrary direction between the first direction and the second direction is provided. The gist is to have prepared.

According to the present invention, there is provided an endoscope apparatus for operating a treatment instrument erecting table provided at a distal end portion of an insertion portion by an operation wire inserted into an erecting operation conduit extending from the operation portion. At the time of the erecting operation, the fluid is simultaneously supplied to the objective optical system cleaning nozzle and the erecting operation conduit by the air or water supply operation, and when the treatment tool is not used or when the treatment tool erecting table is stored, the air or water is supplied. The gist of the present invention is to provide a pipeline control unit for supplying a fluid to the objective optical system cleaning nozzle by the operation of (1).

According to the present invention, there is provided an endoscope apparatus for operating a treatment tool standing table provided at a distal end portion of an insertion portion by an operation wire inserted into a standing operation conduit extending from the operation portion. At the time of the erecting operation, the fluid is simultaneously supplied to the objective optical system cleaning nozzle and the erecting operation conduit by the air or water supply operation, and when the treatment tool is not used or when the treatment tool erecting table is stored, the air or water is supplied. A pipe line control unit for supplying a fluid to the nozzle for cleaning the objective optical system by the operation of (1), and supplying a fluid into the upright operation pipe by an air supply or water supply operation at the time of cleaning the upright operation pipe. Is the gist.

[0023]

Next, an embodiment of an endoscope apparatus according to the present invention will be described in detail with reference to the drawings.
The overall configuration of the endoscope apparatus to which the present invention is applied is shown in FIG.
Since the configuration is the same as that of the conventional endoscope device shown in FIG. In addition, the present invention includes a treatment instrument raising stand of the endoscope apparatus and a conduit control unit of an operation wire conduit for raising the treatment instrument, which will be described as separate embodiments. However, the treatment tool stand described in these embodiments and the conduit control unit of the operation wire conduit can be arbitrarily combined.

FIG. 1 is a perspective view (a) showing the structure of a rigid distal end portion of an embodiment of an endoscope apparatus according to the present invention, and a front view (b) of the rigid distal end portion viewed from an insertion direction. In FIG. 1, the rigid tip portion 1 has a shape in which a part of a substantially cylindrical portion is cut off by a surface substantially perpendicular to the cylindrical axis and a surface substantially parallel to the cylindrical axis. A front-view objective lens 3 for providing a view in the insertion direction, an illumination lens 5 for front-view, and a nozzle 7 for air / water supply are provided on the front surface of the distal end rigid portion.

On the surface substantially parallel to the cylinder axis, there are provided a side-viewing objective lens 9 and a side-viewing illumination lens 11 for providing a side view in a direction perpendicular to the insertion direction. A U-shaped concave groove 13 is provided perpendicular to the surface.

At the bottom of the groove 13, there is provided a multi-joint treatment tool stand 17 in which a plurality of substantially flat plate members 15 are rotatably connected in a row. Treatment instrument stand 17
Is provided on the distal end rigid portion 1 to raise the treatment tool at a predetermined position, and is operated by a treatment tool operation section 41 described later.

A treatment tool injection port (also called a forceps port) 19 is opened at the rear end of the concave groove above the treatment tool stand 17, and one end is fixed to the distal end of the treatment tool stand 17. An opening 23 of an operation conduit for guiding the operation wire 21 is provided.

Further, near the intersection of the cut plane substantially perpendicular to the cylindrical axis and the cut plane substantially parallel to the column axis, a side-viewing illumination lens 1 is provided.
A nozzle 25 for cleaning the objective lens 1 and the side view objective lens 9 is provided.

The optical fibers for guiding light reaching the illumination lenses 5 and 11 and the air / water supply conduits to the air / water nozzles 7 and 25 are provided from the connector portion of the universal cord to the rigid end portion. Are connected to each other by one, and are branched in the rigid distal end portion for forward vision and side vision, respectively, to prevent the outer diameter of the guiding tube inserted into the body cavity from increasing.

In this embodiment, a space at least equal to or larger than the diameter of the treatment tool exit is provided in front of and above the treatment instrument exit so that the treatment instrument can be ejected in both directions of the visual field for forward vision and the lateral vision. It has a tip shape having a portion.

FIG. 2 is a sectional view showing a section parallel to the axis of the rigid tip portion 1. As shown in FIG.
The first light receiving surface 31a is divided into two regions A and B arranged in front and rear in the insertion direction. In the region A, an image captured by the objective lens 5 for forward vision is refracted by the prism 33 to form an image. Has a structure in which an image captured by the side-viewing objective lens 9 is directly formed.

The imaging signal converted by the CCD 31 is transmitted to the main body of the endoscope via the CCD cable 35, and is processed by a processor in the main body and displayed on a monitor. On the monitor, an image for forward vision, an image for lateral vision, or both images are simultaneously displayed according to the selection of the operator.

FIG. 3 shows the structure of the treatment instrument operation section provided inside the scope operation section for operating the treatment instrument stand. In FIG. 3, the treatment tool operation unit 41
Is an operation lever 43 for controlling the erecting / accommodation of the treatment tool, a rotating member 43a formed integrally with the operation lever 43, a cylinder 45 fixed to a substrate portion of the operation section, and a sliding inside the cylinder 45 in the insertion direction. Piston 47, a rod 49 for transmitting the rotation of the operation lever 43 to the piston 47, a bracket 51 for connecting the piston 47 and the rod 49, and a rear end fixed to the front end of the piston 47 by caulking or soldering, and the front end being a treatment tool. The operation wire 21 fixed to the stand 17, the operation tube 5 provided on the outer periphery of the operation wire 21
3 is provided.

The operation tube 53 has a front end opening in the rigid distal end portion, and a rear end portion of the operation tube 53 is screwed to a front end portion of the cylinder via a conduit end 55. Further, an O-ring made of an elastic material (not shown) is attached to keep the airtightness between the pipe terminator and the inside of the cylinder.

A water supply inlet 57 extending obliquely rearward is provided at the rear of the cylinder 45 and is connected to a water supply pipe 59. An O-ring (not shown) made of an elastic member such as silicone rubber is attached to the piston 47 so that the inside of the cylinder 45 has airtightness.

The rotational force applied to the operation lever 43 is transmitted to the piston 47 as a forward and backward movement through a rod 49 attached by a pin 61 on the periphery of the rotating member 43a, and the operation wire 21 can be pushed and pulled. It has become. With such a configuration, the treatment instrument raising stand 17 in the distal end rigid portion 1 is raised or stored by operating the operation lever 43.

FIGS. 4A and 4B are cross-sectional views for explaining the detailed configuration and operation of the cylinder portion of the treatment instrument operation section. FIG. 4A is a sectional view when the treatment instrument is stored (normally), and FIG. It is sectional drawing, (c) Transverse sectional view of an operation wire conduit.

In FIG. 4, the tip 47 of the piston 47 is
a is formed thin and has a hole in the axial direction, and the rear end of the operation wire 21 is fixed to the hole by caulking or soldering. The rear end of the operation tube 53 is fitted into a small-diameter portion at the front end of a cylindrical conduit end 55. The pipe terminator 55 is fixed to the distal end of the cylinder 45 by a screw 63, and an O-ring 65 c is inserted into the outer periphery of the pipe terminator 55 to maintain airtightness with the cylinder 45.

Further, as shown in FIG.
The configuration 3 is a coiled metal spiral tube 53a on the outside.
The inside thereof is covered with a resin tube 53b made of Teflon or the like for ensuring airtightness in order to clean the inside of the treatment instrument operation wire. The operation wire 21 is located inside the treatment instrument operation tube, has a clearance between the operation tube 21 and the resin tube 53b, and the water supplied from the endoscope main body passes through the water supply inflow port, flows into the gap, and the operation wire 21 21 is washed out and flows out from the opening 23 (FIG. 1) of the hard tip portion.

Two O-rings 65a and 65b made of a durable elastic member such as silicon rubber are attached to the piston 47 so that the inside of the cylinder 45 is airtight. The positions of these O-rings are such that the O-rings 65a and 65b are located before and after the water supply inlet 57 when the piston advances, and the O-ring 65a is located behind the water supply inlet 57 when the piston retreats. Are located in

That is, when the treatment instrument erecting operation is not performed, the piston moves forward as shown in FIG. Since the O-rings 65 a and 65 b are positioned before and after 57 and block the space between the cylinder 45 and the piston 47, the fluid flowing from the water supply inlet 57 does not flow into the operation pipe 53.

On the contrary, when the operation of raising the treatment tool is performed, the piston 47 is retracted as shown in FIG. 4B, so that the O-ring 65a is located on the left side of the water supply inlet 57 and the water supply conduit is provided. Is opened so that water can flow into the treatment instrument operation pipe. By taking such a form, during normal observation, air or water can be intensively sent to each objective lens of the distal end rigid portion to secure a visual field.

Next, a specific operation example of the present embodiment having the above configuration will be described with reference to a cross-sectional view of the rigid tip portion shown in FIG. As shown in FIG. 5A, when performing a treatment at the time of observing the front visual field, the treatment tool 77 is inserted from a treatment tool insertion opening (not shown) provided in the operation unit, and the inside of the treatment tool insertion tube 73 is moved. As a result, it reaches the treatment tool ejection port of the distal end rigid portion 1.
At the time of injection of the treatment tool, the treatment tool stand 17 is usually kept in a housed state.

Here, in front of the treatment tool injection port 19 of the rigid distal end portion 1, a space is formed by the concave groove 13 so that there is nothing obstructing the front of the injected treatment tool 77 so that it can be straightened out. Has become. The main body of the endoscope is configured to display at least an observation image of a forward visual field, and an operator can perform treatment while viewing the image.

Next, when performing treatment during observation of the lateral visual field,
As shown in FIG. 5B, the treatment tool inserted from the treatment tool insertion port is fed into the rigid distal end portion. By rotating the operation lever of the operation section in the erecting direction, the piston in the treatment instrument operation section is pulled, and at the same time, the operation wire is also pulled, thereby erecting the distal end portion of the treatment instrument erecting table 17 in the rigid distal end section. The treatment tool standing table 17 is formed with an articulated structure,
A plurality of flat members 15 are connected in a row in a pin-coupled or swiveling manner by caulking or the like so that the adjacent members do not rotate at an angle of, for example, 120 ° or more that sandwiches the connecting pin 71. Has become.

As a result, when the treatment instrument standing table 17 stands up to some extent, the maximum rotation angle between the adjacent flat plates is reached,
No more standing up. The standing angle of the treatment tool 77 is made possible by controlling the amount of the treatment tool standing table 17 to be raised in accordance with the amount of pulling of the operation wire 21.

When the treatment tool standing table 17 is housed, the piston is pushed in by rotating in a direction for accommodating an operation lever (not shown) to release the pulling force. Are successively accommodated. The observation image of the lateral field of view is displayed on the monitor of the endoscope main body as an image, and the operator can perform a treatment while viewing the image as in the case of forward vision.

Here, when the treatment tool is ejected, the operator looks at the image either in a forward view or a side view, and ejects the treatment instrument. However, the treatment instrument is directed in a direction different from the visual field intended by the operator. There is a concern that the liquid will be ejected. In other words, the surgeon inserts the treatment tool in the direction of the lateral visual field in order to eject the treatment tool, but it is highly likely that the treatment tool will go straight out.

Therefore, in order to avoid the above-mentioned concerns, a small convex portion 75 having a size that does not affect the insertion or removal of the treatment tool is provided at the rigid distal end portion in front of the treatment tool stand so that the treatment tool can be used during injection. The distal end portion comes into contact with the convex portion 75.

In this way, when the treatment tool is ejected, the touch of the treatment tool in contact with the convex portion 75 is transmitted to the surgeon's hand, and the position of the distal end of the treatment tool can be known. By doing so, the risk of ejection in a direction different from the intended direction can be avoided by the operator.

FIG. 6 is a cross-sectional view of a hard tip portion showing a second embodiment of the present invention. In the first embodiment, an elastic member 79 is provided instead of the convex portion 75 provided in front of the treatment tool ejection port. The other configuration is the same as that of the first embodiment, and a duplicate description will be omitted.

In FIG. 6, when the distal end of the treatment tool 77 abuts against the elastic member 79, the elastic member 79 is bent by losing its insertion force. In this case, the resistance force corresponding to the amount of bending of the elastic member 79 is sensed by the operator trying to push out the treatment tool, and the distal end position of the treatment tool can be recognized. Thus, it is possible to avoid the risk that the treatment tool is ejected in a direction different from the direction intended by the operator, as in the first embodiment.

FIG. 7 is a cross-sectional view of a hard tip portion showing a third embodiment of the present invention. In the present embodiment, a sensor 80 for detecting a treatment tool is provided in the vicinity of the treatment tool outlet in place of the projection provided in the first embodiment, and a sensor signal line 80a is used to guide the treatment tool from the distal end rigid portion to the middle portion. A treatment tool detection signal is transmitted to an endoscope apparatus main body (not shown) via the operation unit and the universal cord.

When the tip of the treatment tool reaches the treatment tool ejection port, the tip of the treatment tool is displayed on the monitor by text, image display, or voice based on the signal detected by the sensor 80. To inform the surgeon that he has reached the position. By this notification, the surgeon recognizes that the distal end of the treatment instrument is at a position immediately before the ejection, and can confirm the ejection direction. Therefore, the treatment instrument is ejected in a direction different from the direction intended by the operator. Can be prevented.

FIG. 8 is a cross-sectional view for explaining a fourth embodiment of the endoscope apparatus according to the present invention, in which the treatment instrument operating section is further improved from that of the first embodiment. Other configurations are the same as those of the first embodiment.

In this embodiment, three positions, a treatment tool storage position (during normal observation), a treatment tool standing position, and a standing conduit cleaning position are provided on an operation lever (not shown) for the treatment tool standing operation. ing. The treatment instrument storage position in FIG. 8A and the treatment instrument upright position in FIG. 8B have the same function as in the first embodiment, but are not shown in the upright pipe cleaning position in FIG. 8C. The difference is that the entire amount of water sent from the water supply pump is sent to the upright pipe for cleaning the upright pipe. This makes it possible to easily clean the upright duct after the operation.

In FIG. 8, the treatment tool operation section includes a fixed cylinder 81 fixed to an operation section board (not shown), a movable cylinder 83 inserted inside the fixed cylinder 81, and a main part sliding in the movable cylinder 83. 1, a piston 87 whose rear end slides inside the fixed cylinder 81, a water supply inlet 57 for flowing water from a water supply pump (not shown) into the fixed cylinder 81, and a water supply nozzle (not shown in FIG. 1) from the fixed cylinder 81. 7, 25) is provided with a water supply outlet 91 for discharging the water supply.

The O-ring 93a is provided between the fixed cylinder 81 and the movable cylinder 83, the O-rings 93b and 93c are provided between the piston 87 and the movable cylinder 83, and the O-ring 93 is provided between the piston 87 and the fixed cylinder 81. Ring 93d,
O is provided between the rear end of the fixed cylinder 81 and the rod 89.
Each of the rings 93e is provided to maintain airtightness.

Further, the rod 89 corresponds to the right side (FIG. 8 (a)) and the left side (FIG.
(B)), and at three further positions on the right side (FIG. 8 (c)).

The movable cylinder 83 has a large-diameter portion 83a whose outer peripheral portion projects in a flange shape, and is attached from the right side so that the large-diameter portion abuts on the right end of the fixed cylinder 81 except when washing the upright pipe. It is pressed by the biased spring 85. In this state, the hole 8 provided in the movable cylinder 83
3b matches the position of the water outlet 91.

At the time of normal observation in which the operation lever (not shown) is at the treatment tool storage position, as shown in FIG. 8A, the piston 87 is pushed to the right by the rod 89. In this state, the water supplied from the water supply inlet 57 into the fixed cylinder 81 flows to the water supply outlet 91 through a gap between the fixed cylinder 81 and the movable cylinder 83, and the water supply nozzle 7, not shown,
The whole amount is sent to a strong water flow to 25 so that the objective optical system can be quickly washed.

Next, at the time of the treatment tool standing operation in which the operation lever (not shown) is at the treatment tool standing position, as shown in FIG.
The piston 87 is pulled to the left by the rod 89. In this state, the water supplied from the water supply inlet 57 into the fixed cylinder 81 flows into the water supply outlet 91 through a gap between the piston 87 and the fixed cylinder 81 and a gap between the fixed cylinder 81 and the movable cylinder 83. The water is sent to the water supply nozzles 7 and 25, and is sent from the small-diameter portion of the distal end of the piston 87 to the operation pipe around the operation wire 21 through the holes 87c and 87b. In other words, the water is distributed to the water supply nozzle and the operation pipe, and the water is supplied, so that both can be washed at the same time.

Finally, when the operation lever (not shown) is in the upright position, the piston 87 is moved to the rightmost position against the urging force of the spring 85 by the rod 89, as shown in FIG. Has been pushed to. In this state, the water supplied from the water supply inlet 57 into the fixed cylinder 81 is coaxially formed in the piston 87 from the space at the rear of the piston 87 through a hole 87c provided at a connection portion between the rod 89 and the piston 87. After flowing into the water supply passage 87a provided in the water supply passage 87a and flowing through the water supply passage 87a toward the distal end of the piston 87, the operation around the operation wire 21 from the small-diameter portion of the piston 87 through the hole 87b is performed. Sent to pipeline. That is,
The entire amount of water is sent to the operation pipe, and the operation pipe can be sufficiently washed with strong water pressure.

In the above-described embodiment, water is supplied to both the nozzle (water supply nozzle) of the rigid portion at the tip and the operation pipe around the operation wire. However, the same applies to the case of air supply. be able to.

[0065]

As described above, according to the present invention, the treatment tool standing table capable of ejecting the treatment tool in an arbitrary direction between the first visual field direction and the second visual field direction is provided. Thus, observation and treatment in the body cavity can be performed without performing an angle operation. As a result, quick examination and treatment can be performed, and treatment in a narrow lumen can be performed.

According to the present invention, when the treatment tool is not used or when the treatment tool is not raised, the entire amount of water is used for cleaning the objective optical system. When the treatment tool is standing up, water can be supplied to both the washing with the objective optical system and the washing of the operation wire, so that both can be washed at the same time.

[Brief description of the drawings]

FIG. 1 is a perspective view (a) and a front view (b) showing the structure of a distal end rigid portion in an embodiment of an endoscope apparatus according to the present invention.

FIG. 2 is a cross-sectional view of a rigid distal end portion showing a configuration of an objective optical system.

FIG. 3 is a plan view showing the structure of a treatment instrument operation unit provided inside the endoscope operation unit.

FIG. 4 is a cross-sectional view showing details of a treatment instrument standing operation section;
A vertical sectional view (a) in a normal state (when the treatment tool is stored), a vertical sectional view (b) when the treatment tool is standing, and a cross-sectional view (c) of the operation wire conduit.
It is.

FIGS. 5A and 5B are views showing a use state in the first embodiment of the present invention, and are a partial cross-sectional view showing a state of the treatment tool in a front view, and a state of the treatment tool in a side view. (B) of FIG.

FIG. 6 is a cross-sectional view of a distal end hard portion showing a second embodiment of the present invention.

FIG. 7 is a cross-sectional view of a rigid tip portion showing a third embodiment of the present invention.

FIG. 8 is a cross-sectional view illustrating details of a treatment instrument standing operation section according to a fourth embodiment of the present invention.
(B) At the time of the treatment tool erecting operation, and (c) at the time of the erecting pipeline cleaning.

FIG. 9 is a perspective view illustrating an appearance of the endoscope apparatus.

FIG. 10 is a cross-sectional view showing a configuration of a conventional endoscope.

FIG. 11 is a perspective view showing a structure of a rigid end portion of a conventional endoscope.

FIG. 12 is a partially exploded plan view showing a configuration of a treatment tool operation section of a conventional endoscope.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Hard-tip part, 3 ... Objective lens for front view, 5 ... Illumination lens for front view, 7 ... Nozzle, 9 ... Objective lens for side view,
11: side view illumination lens, 13: concave groove, 17: treatment tool stand, 19: treatment tool exit port, 21: operation wire.

Claims (6)

[Claims] 1. An endoscope having a field of view in a first direction along an insertion direction of an insertion portion inserted into a body cavity of a subject, and a field of view in a second direction different from the first direction. An endoscope apparatus, comprising: a treatment instrument standing table capable of ejecting a treatment instrument in an arbitrary direction between the first direction and the second direction. 2. The treatment instrument stand includes a multi-joint portion having a distal end portion connected to an operation wire and a base portion rotatably connected to an endoscope distal end rigid portion, and the amount of pulling of the operation wire. The treatment tool pushed by the multi-joint portion stands up in an arbitrary direction from the first direction to the second direction by bending the multi-joint portion according to the following. 2. The endoscope device according to 1. 3. A protruding portion for preventing the treatment instrument from projecting when the treatment instrument erecting stand is not upright, or a distal end portion of the treatment instrument near a forceps port that opens to a rigid distal end portion of the insertion portion. 3. The endoscope apparatus according to claim 1, further comprising: an elastic body that serves as an insertion resistance when reaching the vicinity of the forceps opening. 4. A sensor for detecting that the distal end of the treatment instrument has reached the vicinity of the forceps opening opening at the distal end rigid portion of the insertion section, and the treatment instrument is provided with a detection signal based on a detection signal from the sensor. 3. The endoscope apparatus according to claim 1, wherein the position of the distal end is notified by an image display or an audio signal. 5. An endoscope apparatus for operating a treatment tool standing table provided at a distal end portion of an insertion portion by using an operation wire inserted into a rising operation conduit extending from an operation portion, wherein the operation tool is operated at the time of standing operation of the treatment tool. The fluid is simultaneously supplied into the objective optical system cleaning nozzle and the erecting operation pipe by the air or water supply operation, and the air or water supply operation is performed when the treatment tool is not used or when the treatment tool stand is stored. An endoscope apparatus comprising a pipeline control unit that supplies a fluid to a nozzle for cleaning an objective optical system. 6. An endoscope apparatus for operating a treatment tool standing table provided at a distal end portion of an insertion portion by an operation wire inserted into a standing operation conduit extending from an operation portion, wherein the treatment tool standing operation is performed when the treatment tool is operated to stand. The fluid is simultaneously supplied into the objective optical system cleaning nozzle and the erecting operation pipe by the air or water supply operation, and the air or water supply operation is performed when the treatment tool is not used or when the treatment tool stand is stored. A fluid control unit for supplying a fluid to the objective optical system cleaning nozzle, and supplying a fluid into the upright operation pipe by an air supply or a water supply operation when cleaning the upright operation pipe; Endoscope device.