JP3283115B2 - Endoscope - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an endoscope having at least one treatment instrument channel through which forceps and the like can be inserted.

[0002]

2. Description of the Related Art In recent years, endoscopes have been used in the medical and industrial fields. An endoscope used in the medical field performs not only observation of an insertion site but also a biopsy of a place considered to be a lesion. Therefore, a duct (hereinafter referred to as a treatment instrument channel) for guiding a treatment instrument such as a biopsy forceps to the distal end portion of the endoscope is formed from the proximal side of the endoscope to the distal end side. In addition, there is also provided a forceps raising base (hereinafter referred to as a treatment tool table) for changing the direction of projection of the treatment tool when the treatment tool is protruded to the distal end of the endoscope. For example, Japanese Patent Publication No. 63-17450 and Kosho 64
Japanese Patent Publication No. -5895 is one example.

[0003] In Japanese Patent Publication No. 63-17450, a treatment tool table is made parallel to the center of the field of view of an observation window, and a wire for raising the treatment tool table is connected to a cutout provided in the treatment tool table. An endoscope in which a treatment tool is directed toward the center of the visual field by pressing the tool toward the center of the visual field has been disclosed.

However, in the configuration of the treatment tool table disclosed in Japanese Patent Publication No. 63-17450, a wire is connected to a notch provided in the treatment tool table, so that the wire is connected to the inside of the treatment tool table, that is, the treatment tool. It will be substantially closer to the supporting surface. In this case, there is no problem in protruding a relatively hard and thick treatment tool, but a thin and flexible treatment tool is likely to be caught by the wire and may not be able to protrude to the distal end of the endoscope.

[0005] In addition, when the pressing force of the wire is large, the flexible treatment tool may be crushed and may not function properly. For example, a contrast tube used for transendoscopic pancreaticocholangiography is inserted into the duodenal papilla, bile duct, or pancreatic bile from the duodenum, and a contrast agent is injected. For this reason, the very flexible imaging tube may be crushed by the pressing force of the wire when the treatment tool stand is raised, and the contrast agent may not be injected.

[0006] As described above, there is provided an endoscope having a treatment tool base that can be controlled to be lifted at the center of the visual field of an observation window without crushing or breaking a flexible treatment tool. Is desired.

[0007] Recently, as disclosed in Japanese Patent Publication No. 2-54734, an endoscope cover (sheath) is provided on the outer periphery of the endoscope.
The endoscope cover is disposable for each case.
Such an endoscope of an endoscope cover type that minimizes the downtime of the endoscope and the doctor, that is, an efficient endoscope cover system is disclosed.

For example, in Japanese Patent Publication No. 64-5895, when the erecting element (treatment instrument table) is raised, the treatment instrument can be smoothly guided without any sharply bent portion. Therefore, the treatment tool table is formed of an elastic member.

[0009] The treatment tool base made of the elastic member can be raised by pulling a raising wire connected to the treatment tool base.
There is an advantage that when the wire is released, the wire is returned (inverted). On the other hand, according to the embodiment of the above-mentioned publication, a plate-shaped treatment tool base having a thickness of 0.03 mm to 0.5 mm is disclosed, and since these are on the plate and thin, the treatment tool is pulled when the raising wire is pulled. The table is twisted and the direction of projection of the treatment tool is not constant, so there is room for improvement.

On the other hand, Japanese Patent Publication No. 2-54534 discloses a technique in which an elastic thin film is formed at an opening of a biopsy channel (treatment instrument channel), and the biopsy channel is moved by rotating a treatment instrument table provided outside the biopsy channel. Therefore, the opening moves in the vertical direction (axial direction of the endoscope),
That is, the direction in which the treatment tool projects is changed.

However, in Japanese Patent Publication No. 2-54534, the thickness of the biopsy channel in contact with the treatment instrument table and the thin film at the opening are not only difficult to assemble, but also the outer diameter of the endoscope end is reduced. Will increase. this is,
It can be painful to the patient during insertion and there is room for improvement.

[0012]

SUMMARY OF THE INVENTION The aforementioned Japanese Patent Publication No. 64-58
Japanese Unexamined Patent Publication No. 95 is a treatment tool table made of an elastic member, which is a thin plate having a thickness of 0.03 mm to 0.5 mm. The projection direction of the tool may not be constant. In some cases, the treatment tool does not correctly project in the target direction due to the twist, and there is room for improvement.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide an endoscope in which the entire treatment tool table has a small amount of twist and the treatment tool can be reliably projected in a target direction.

[0014]

An endoscope according to the present invention comprises:
An insertion portion to be inserted into a subject; and an insertion portion provided at a tip of the insertion portion.
The distal end component, and the distal end
For guiding the treatment tool protruding from the component in the desired direction
Of fit, flexible surgical instrument stand, which is formed of a material having, before
Fixing part for fixing the base end of the treatment instrument base to the distal end component
When, on the side at the tip of the treatment instrument stand, the tip contact
And is extended into the insertion portion and pulled from the proximal end side.
Raise and reverse the treatment tool table by pulling / relaxing operation
An upper operation wire , provided on the treatment tool table,
Is bent in a direction to raise the treatment tool table in accordance with the raising operation of
And a hinge portion formed of a thin portion to be formed.
Sign .

[0015]

In the constitution of the present invention, the treatment tool table is formed of a flexible material, at least one hinge portion is provided on the treatment tool table, and the treatment tool table is operated by the treatment tool raising device. As a result, the hinge portion is deformed, the treatment tool table is curved, and the treatment tool is moved to a predetermined position. At this time, the portion to be deformed is limited to the thin hinge portion, and the entire treatment tool table does not elastically deform, that is, the torsion of the treatment tool table is small. Therefore, the treatment tool is reliably projected in the target direction.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 1 to 8 relate to a first embodiment of the present invention. FIG. 1 is an overall configuration diagram of an endoscope apparatus, FIG. 2 is a configuration diagram of an insertion portion cover portion, and FIG. FIG. 4 is a perspective view showing the structure of the cover distal end portion, FIG. 5 is a sectional side view of the distal end side of the insertion portion cover portion, and FIG. 6 is a view of the insertion portion cover portion. Side sectional view of the side,
FIG. 7 is a configuration diagram of the treatment tool table, and FIG. 8 is an operation explanatory diagram of the treatment tool table.

An endoscope device 1 of an endoscope cover type shown in FIG. 1 has an endoscope 2 of an endoscope cover type (hereinafter, referred to as a cover type endoscope). This cover type endoscope 2
Is an endoscope cover (hereinafter, referred to as an endoscope cover) 3 provided with an air supply / water supply conduit, a suction conduit, and a treatment instrument channel, and an endoscope attached to the endoscope cover 3. It is a combination with an endoscope for a mirror cover (hereinafter, referred to as an endoscope for a cover) 4. At the time of the endoscope inspection, the endoscope 4 for the cover is attached to the clean endoscope cover 3, and after the inspection, the endoscope cover 3 is discarded, thereby cleaning and disinfecting the endoscope after the inspection. It is unnecessary or reduced.

The endoscope apparatus 1 has a cart 5 on which various peripheral devices and the like connected to the cover-type endoscope 2 are loaded, and a cover holder 6 for holding the cover-type endoscope 2. are doing.

The cart 5 includes, for example, a light source device 7, a video processor 8, a fluid control device 9, and an endoscope cover extender (hereinafter referred to as an endoscope cover extender) used when the cover endoscope 4 is mounted on the endoscope cover 3. , An expander) and the like. A monitor 1 that receives an image signal from a video processor 8 and displays an endoscope image is provided on an upper surface of the cart 5.
1 is loaded.

The cover endoscope 4 is provided with an operation portion 13 which also serves as a large-diameter grip portion, which is connected to the proximal end of the elongated endoscope insertion portion 12 on the proximal side. Extends from the universal cord 14. A connector 15 is provided at an end of the universal cord 14.

The light source device 7 is connected via a connector 15
It is detachably connected to the cover endoscope 4 and supplies illumination light to the endoscope. Further, the video processor 8 includes a signal cable 1 extending from a side of the connector 15.
6, the cover endoscope 4 is detachably connected to the cover endoscope 4. And the video processor 8
Performs driving of an imaging unit built in the endoscope 4 for a cover, performs signal processing on a signal output from the imaging unit, converts the signal into a standard video signal, and outputs the signal to the monitor 11. .

The dilator 10 is connected to an expansion tube 17 through which the endoscope cover 3 is connected.
It is for expanding by sending air inside. By this expansion, the endoscope cover 3 can be attached to or removed from the cover endoscope 4. At this time, for example, the proximal side of the endoscope cover 3 is held by the cover holder 6, and the endoscope 4 is inserted or removed.

The endoscope cover 3 includes a soft insertion portion cover portion 18, a thin and soft operation portion cover portion 19 made of a polymer such as vinyl chloride, and a universal code cover portion 20. The endoscope insertion portion 12, the operation portion 13, and the universal cord 14 of the mirror 4 are respectively covered.

The fluid control device 9 includes an air supply control valve 21,
A water supply control valve 22 and a suction control valve 23 are provided, and air supply, water supply, and suction are controlled by these electromagnetic valves. Air supply control valve 2
1, an air supply line 24, a water supply line 25, and a suction line 26 extending from the insertion portion cover 18 are connected to the water supply control valve 22 and the suction control valve 23, respectively.

The suction control valve 23 has a suction tube 27.
Is connected, and an aspirator (not shown) is connected to the end. As a result, unnecessary body fluids and the like can be suctioned from the endoscope distal end portion. The water supply tube 2 is connected to the water supply control valve 22.
8 is connected, and a water supply tank 29 is connected to a distal end thereof. Further, two air supply tubes 30 extend from the fluid control device 9, and include an air supply control valve 21 and a water supply tank 2.
9 respectively.

FIG. 2 shows the insertion portion cover 1 of the endoscope cover 3.
8 shows the entire configuration.

The insertion section cover 18 is provided with an endoscope operation section fixing mouth (hereinafter, referred to as an endoscope) for connecting and fixing the cover end configuration section 31, the cover outer cover 32, and the endoscope operation section 13 from the front end side. 33) is hermetically connected. The cover front end component 31 is provided with a front end opening 39, and the front end opening 39 is provided with an optically transparent cover glass 34 and a channel opening 35. The cover glass 34 faces the observation window and the illumination window of the cover endoscope 4 inserted into the endoscope cover 3 to enable irradiation of illumination light toward the test site and observation of the test site. And

The mouth part 33 is provided with a treatment tool insertion port 36 communicating with a treatment tool channel provided therein, and a treatment tool raising lever 37 as a treatment tool raising device operating member. . The treatment tool raising lever 37 constitutes a treatment tool raising device that raises a distal end portion of a treatment tool such as forceps inserted through the treatment tool insertion port 36 into the treatment tool channel. By operating this treatment instrument raising lever 37,
A treatment tool table to be described later stands up.

FIG. 3 shows a state in which the endoscope cover 3 is attached to the endoscope 4 for cover.

The insertion section 12 of the cover endoscope 4 is inserted into the insertion section cover section 18, the operation section 13 is covered with the operation section cover section 19, and the universal cord 14 is covered with the universal code cover section 20. After this, the fixing tape 38
Are wound around joints of the cover portions and fixed, so that the respective portions of the endoscope 4 for the cover are fixed by the endoscope cover 3 (the insertion portion cover portion 18, the operation portion cover portion 19, and the universal code cover portion 20). It is airtight and can be isolated from the outside environment.

FIG. 4 shows the structure of the cover tip component 31.
(A), (b) and (c) show. The cover tip component 31 includes an outer cap 40 made of a polymer material shown in FIG. 4B and an inner hard portion main body 41 shown in FIG.
Consists of The hard portion main body 41 is inserted into the insertion portion cover portion 18.
It has an endoscope distal end insertion hole 42 that communicates with an endoscope insertion channel provided therein and into which the endoscope distal end fits, and a channel opening 43 that communicates with the treatment instrument channel. Further, the hard part main body 41 is provided with a treatment tool table 44 provided on the distal end side of the channel opening 43 and a treatment tool table 4.
4 has a metal wire 46 fixed at one end to a side portion thereof and introduced into a wire insertion opening 45 opened near the channel opening 43.

The treatment tool base 44 has a proximal fixing portion 47, and one end of the proximal fixing portion 47 is fixed to a fitting groove 48 provided in the hard portion main body 41.

The cap 40 has a front end opening 39 and can be inserted from the front end side of the hard portion main body 41. At this time, the cover glass 34 and the treatment tool stand 44
Guided to the side. Also, the cap 40 shown in FIG.
A cap hand side opening 49 is formed at the insertion end side of the cap as shown in FIG. The cap proximal opening 49 is provided with a fixing groove 50 that fits into the other end of the proximal fixing portion 47 of the treatment tool base 44. Further, at the end of the cap proximal opening 49, a plurality of key portions 52 are provided which engage with the engaging grooves 51 provided in the circumferential direction of the hard portion main body 41. Then, by inserting the cap 40 from the distal end side of the hard portion main body 41, the key portion 52 is engaged with the engagement groove 51. In addition, the fixing groove 50 of the cap 40 presses the proximal fixing portion 47 of the treatment tool base 44 against the hard portion main body 41, and the movement in the circumferential direction is regulated by the fitting groove 48 and the inner surface of the cap 40. The proximal fixing portion 47 of the treatment tool base 44 is completely fixed. With the cap 40 fixed to the hard portion main body 41, a channel opening 35 shown in FIG. 2 is formed.

The distal end of the insert cover 18 is shown in FIG. 5 in an axial sectional view.

The distal end of a channel tube 54 constituting the treatment instrument channel 53 is connected to the hard portion main body 41 and communicates with the channel opening 43 in the insertion portion cover portion 18. Further, the wire tube 55 is connected to the rigid portion main body 41 and communicates with the wire insertion port 45.
The wire 46 passes through the insertion portion cover portion 18, further passes through a wire tube 55 connected to the hard portion main body 41, and has a hand side extending to the mouth portion 33.

An endoscope channel (not shown) is provided in the insertion portion cover 18 substantially in parallel with the channel tube 54 of the treatment instrument channel 53. The cover endoscope 4 is inserted in communication with 42.

The insertion portion cover 18 of the endoscope cover 3
Is configured as shown in FIG.

The proximal end of the channel tube 54 and the wire tube 55 is fixed to the mouth 33. The channel tube 54 communicates with the treatment instrument insertion port 36 in the mouth part 33. Further, the wire 46 extending to the mouth part 33 through the inside of the wire tube 55,
It is fixed to a wire support member 56 provided on the hand side. The treatment tool lever 37 is connected to the wire support member 56, and by operating the treatment tool lever 37, the wire support member 56 moves in the front and rear direction in the mouth portion 33.

FIGS. 7 and 8 show the structure and operation of the treatment tool table 44. FIG.

The treatment tool table 44 is made of a flexible polymer material such as polypropylene. FIG.
As shown in (a), the treatment tool base 44 has a wire fixing hole 57 for connecting and fixing the wire 46 on the side of the distal end side. Further, the treatment tool table 44 is provided with two grooves 58, 58 at two points in the middle thereof from two opposite directions. The two hinge portions 59 thinned by the four grooves 58 are deformed as shown in FIG. 8 by the wire 46 being pulled by the operation of the treatment tool lever 37 of the mouth portion 33, and the treatment tool table 44 is pulled. Can be launched. That is, the treatment tool table 44 is curved.

Note that the deformation of the hinge portion 59 is limited to the angle until both ends of the groove portion 58 abut. For example, in the present embodiment, the two groove portions 58 can be bent at angles of 20 to 45 degrees, respectively. It is formed so that it becomes. Thereby, in the present embodiment, 70 ° is
And a rising angle α of about 120 degrees. Note that FIG.
(A), the broken line of the treatment tool stand 44 shown in FIG. 8 indicates the bottom 61 of the treatment tool insertion / removal groove 60. In addition, the treatment tool insertion / removal groove 6
7A is a U-shaped groove as shown in FIG. 7B, which is a cross-sectional view taken along the line AA of FIG. 7A, and two end portions of the U-shaped groove. Among the tops, the top on the cover glass 34 side is formed lower than the other.

FIGS. 9A to 9D show the positional relationship between the treatment tool table 44 and the hard portion main body 41. FIG. FIG. 9 (a)
FIG. 9B is a view of the treatment tool stand 44 and the hard portion main body 44 as viewed from the distal end side. FIG. 9B is a view of the arrow C in FIG. is there.

The treatment tool stand 44 is arranged in parallel with the wall 41a of the hard part main body 41, which is perpendicular to the surface on which the cover glass 34 is mounted. Thereby, the illumination window 34a and the observation window 34
and the center of the field of view of the cover glass 34 made of b, the treatment instrument table 4
4 are installed in parallel. Also, the bent portion 46 of the wire 46
a and a straight line connecting the wire insertion port 45 to the treatment tool table 44.
A wire insertion port 45 is provided so as to be parallel to the side surface of the body and outside the treatment tool table 44. Further, the wall 41a and the treatment tool table 44 are spaced apart from each other so as to have a certain gap t.

FIG. 9C is a view of the treatment tool stand 44 as viewed from the distal end with the treatment tool stand 44 raised, and FIG. 9D is a view of FIG. 9C.
FIG.

As the wire 46 is pulled, the hinge 5
9 is deformed, the treatment tool base 44 rises to the angle α shown in FIG. 8, and only one side surface of the treatment tool base 44 is pulled by the wire 46. A slight twist occurs in the circumferential direction of the endoscope. 9C and 9D due to slight twisting of the hinge portion 59.
As described above, the treatment tool base 44 is inclined in the circumferential direction and abuts on a part of the wall 41a. In this state, the center of the visual field and the treatment tool table 4
4 forms an angle β shown in FIG. 9C. By setting the gap t so that the angle β is 2 degrees to 10 degrees, observation of the endoscope and operation of the treatment tool 100 are facilitated.

In the endoscope apparatus 1 of the endoscope cover system having the above-described configuration, a sterilized clean endoscope cover 3 is attached to the cover endoscope 4 when used. In this way, the cover endoscope 4 is inserted into the examination site in the body cavity as the cover endoscope 2 in a state of being isolated from the external environment. The treatment tool 100 inserted through the treatment tool insertion port 36 projects from the channel opening 35. At this time, in order to perform a biopsy or the like of the examination site, the wire 46 is pulled through the treatment tool raising lever 37, the hinge portion 59 is deformed, the treatment tool table 44 is raised, and the treatment tool 100 projects. Change direction. At this time, the treatment tool table 44 rises in a direction parallel to the center of the visual field, and is tilted in a direction forming an angle β with respect to the center of the visual field due to a slight twist deformation in the circumferential direction of the hinge portion 59,
The protruding direction of the treatment tool 100 can be directed to the center of the visual field, and the treatment is performed. Note that the top of the treatment tool base 44 on the center side of the visual field is formed lower than the other top, so that the treatment tool 1
The slope that leads 00 to the center of the field of view is slightly shorter.

On the other hand, when the wire 46 is relaxed, the rising angle becomes small due to the restoring force due to the elasticity of the hinge portion 59. Thus, the raising angle can be adjusted by pulling / relaxing the wire 46.

After the treatment, the treatment instrument raising lever 37 is operated in reverse, the wire 46 is relaxed, and the treatment instrument table 44 is inverted.

After use, the endoscope cover 3 is discarded. Therefore, the air supply line 24, the water supply line 25, the suction line 26, and the treatment instrument channel 53 provided together with the endoscope cover 3 are also discarded.

In this embodiment, since the endoscope cover 3 is used, the cover endoscope 4, which is the main body of the endoscope, does not need to be washed or sterilized each time it is inspected, and is always clean and simple. Can be used repeatedly.

The treatment tool table 44 of the present embodiment is formed of a flexible material and has two hinge portions 59. Even if the treatment tool table 44 is raised, the treatment tool can be rapidly moved. Since there is no bent portion, the treatment tool can be raised smoothly without damaging the treatment tool.

Further, in the present embodiment, since only the hinge portion 59 is bent at the treatment tool table 44, the treatment tool table 44 is formed by a thin plate-like elastic member, and thus the treatment tool table 44 is bent. The torsion of the tool base 44 is small. Therefore, it is possible to ensure that the treatment tool projects in the target direction. This setting of the target direction allows the treatment tool to be directed toward the center of the field of view by the deformation of the hinge portion 59 of the treatment tool table 44 in the direction of the center of the field of view and the inclination in the circumferential direction. There is no need to crush unnecessary treatment tools.

As described above, the endoscope, by providing at least one hinge portion on the treatment tool base, prevents the entire treatment tool from being largely twisted, while actively utilizing the slight twisting. . That is, the endoscope is arranged outside the treatment tool table and is a wire that is a pulling member connected to the treatment tool table, and introduces this wire into the endoscope, and moves the treatment tool table in the observation field center direction. With a wire withdrawal (insertion) port provided to apply a slight torsional force or bending moment to the treatment instrument table via the wire to incline, when the wire is pulled, the treatment instrument table tilts toward the viewing center of the observation window. I started to get up.

In this embodiment, the wire 46 is disposed outside the treatment tool insertion / removal groove 60 of the treatment tool table 44.
Since the treatment tool and the wire 46 are separated from each other, the thin treatment tool does not catch on the wire 46. Therefore, there is no possibility that the treatment tool table is damaged.

In the present embodiment, the treatment tool table 44 at the time of rising
Is inclined to the center of the visual field by the wall 41a and the treatment tool base 44.
, The slight twisting of the hinge portion 59 of the treatment tool base 44 in the circumferential direction is reliably restricted, and both the flexible treatment instrument and the hard treatment instrument can be raised in a certain direction. It is very easy to operate.

In the present embodiment, the treatment tool table 44 and the wall 4
Since 1a is a point contact or a line contact and has a small frictional force, the amount of raising force applied to the wire 46 may be small, and the fatigue of the operator can be reduced.

In this embodiment, since the treatment tool table 44 is made of a polymer material, even if the current-carrying part of the high-frequency treatment tool (such as a papillotome knife) accidentally touches the treatment tool table, the treatment tool table is not moved. No damage.

Further, in this embodiment, since the structure of the cover tip constituting portion is simple, the outer diameter does not become large.

Although the wire 46 is made of metal in this embodiment, it may be made of a polymer material. in this case,
There is an effect that the electrical insulation of the endoscope cover 3 is further improved.

FIG. 10 shows a treatment tool table according to a first modification. FIG. 10A is a side view of the treatment tool table, and FIG.
FIG. 3 is a sectional view taken along line EE of FIG.

Unlike the first embodiment, the treatment tool table 44A does not have the groove 58 on the upper surface side, but has two grooves 58 only on the lower surface side.
A is formed. In addition, the same configurations and operations as those of the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

The treatment tool table 44A has a groove 58A formed along the shape of the treatment tool insertion / removal groove 60, and a hinge portion 59A.
Has a substantially uniform thickness.

With the above configuration, the treatment tool insertion / removal groove 60 can be formed very smoothly, and the insertion / removal of the treatment tool becomes smooth. Further, since the thickness of the hinge portion 59A is substantially uniform, a smooth rise can be achieved as in the first embodiment.

The other constructions and functions and effects are the same as those of the first embodiment, and the description is omitted.

FIGS. 11 and 12 show a treatment tool table according to a second modification. FIG. 11 is a top view of the treatment tool table, and FIG. 12 is a side view of the treatment tool table.

In this modification, a treatment tool table 62 is provided in place of the treatment tool table 44. The treatment tool table 62 has a groove 58 and a hinge 59 as in the above embodiment. Further, the treatment tool table 62 includes:
As shown in FIG. 11, diagonal grooves 63 are formed at both ends of the groove 58. The oblique grooves 63 are formed obliquely from the proximal side to the distal side of the treatment tool table 62.

According to the treatment tool table 62 having the above-described structure, when the hinge portion 59 is bent and raised, the upper surface portion (the portion above the hinge portion 59) of the oblique groove 63 is closed and fitted, and Even if a sudden twisting force is generated in a part of the tool base 62, the fitting restricts the twisting.

Further, since the present modified example has a structure resistant to torsion, the rigidity of the material of the treatment tool table 62 is not so required.
Inexpensive materials can be used.

The other constructions and functions and effects are the same as those of the first embodiment, and the description is omitted.

FIG. 13 shows a configuration of a treatment tool table according to the second modification.

The treatment tool table 64 shown in FIG. 13 is provided with only one opposing groove 58, and the direction of the opposing groove is oblique to the axial direction. Since the treatment tool table 64 of this modification has a configuration in which only one hinge portion 59 is bent, the treatment tool table 64 operates in the same manner as the treatment tool table that rises by rotating motion used in a conventional endoscope. As shown in the figure, the endoscope of the conventional reusable type (without a cover) has exactly the same usability as that of the endoscope, and is very easy for the operator to operate.

FIG. 14 shows the configuration of a treatment tool table according to a third modification.

The treatment tool table 65 shown in FIG. 14 has grooves as in FIG. 7, but the grooves are not opposed to each other. That is, the treatment tool base 67 is provided with the lower groove 67 slightly distal to the upper groove 66, and similarly, the groove 69 is formed slightly distal to the groove 68. These grooves 66 and 67
The hinge part 70 and the hinge part 71 formed between them can reduce the volume of the minimum thickness part, and the bending easiness by the hinge part is the same as that of the modified example, and the mechanical strength is improved. The durability is further improved.

The other constructions and functions and effects are the same as those of the first embodiment, and the description is omitted.

FIGS. 15 to 17 relate to a second embodiment of the present invention. FIG. 15 is a top view of a treatment tool table, FIG. 16 is a top view showing the operation of raising the treatment tool table, and FIG. FIG.

This embodiment is different from the first embodiment only in the treatment tool table. Therefore, only the treatment tool table will be described. In addition, the same configurations and operations as those of the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

As shown in FIG. 17, the treatment tool table 101 has a channel tube 54 extending toward the cap 40 and, for example, three notches 102 provided on the upper side. This treatment tool table 101 can be said to be a treatment tool table with a cover.
By forming the notch 102, the treatment tool table 10
1, a hinge portion is formed.

As shown in FIG. 15, one end of the wire 46 is inserted into the wire insertion port 45 provided near the center axis of the hard part main body 41 from the treatment tool table 101, and the other end is the tip of the treatment tool table 101. The rigid body 41 is connected to a side far from the central axis.

With the above configuration, when the wire 46 is pulled, the treatment tool table 101 rises as shown by the broken line in FIG. 17, and the treatment tool table 67 is placed on the center axis side of the hard portion main body 41 as shown in FIG.
Can be twisted, and the treatment tool can be tilted about the center of the visual field.

In the present embodiment, since the treatment tool table 101 is formed by extending the channel tube 54, there is a problem in that the conduit continues smoothly from the treatment tool channel 54 to the treatment tool table 101, and the treatment tool is caught. Without it, it is easy to use for the surgeon.

In this embodiment, the channel tube 5
4, the treatment tool table 101 is formed, so that the number of components can be reduced and an inexpensive endoscope can be provided.

Further, in the present embodiment, the inclination angle of the treatment instrument table 101 is limited to the time it comes into contact with the wall 41a, and a constant inclination is always obtained regardless of the hardness of the treatment instrument. It is a good thing.

In the present embodiment, the treatment tool table 10
1 is formed by providing a notch 102 in the channel tube 54, but the channel tube 54 is made of a more flexible material,
For example, a configuration in which the notch 102 is eliminated may be adopted by using a material such as fluororesin or polyethylene.

FIGS. 18 and 19 relate to a third embodiment of the present invention. FIG. 18 is a view showing the configuration of a treatment tool table, and FIG. 19 is an explanatory view of the operation of the treatment tool table.

The second embodiment differs from the first embodiment only in the treatment tool table, and therefore only the treatment tool table will be described. Other configurations and operations are the same as those of the first embodiment, and therefore the description and other drawings are omitted.

The treatment tool base 72 shown in FIGS. 18A and 18B has a raised portion 73 for substantially raising a treatment tool, and an elastic end having one end inserted and fixed to the proximal side of the raised portion 73. A spring 74 as a U-shaped hinge portion having
And a fixing portion 75 which is inserted and fixed at the other end thereof and is separated from the raised portion 73. The fixing portion 75 includes a first
It is fixed by the same configuration as the hand-side fixing portion 47 in the embodiment.

The spring 74 is fixed to the wall 41a (not shown) with respect to the treatment tool base center axis, that is, the side opposite to the side to which the wire 46 is connected and fixed.

In the above configuration, the wire 46 is pulled by operating the treatment instrument raising lever 37 to thereby obtain the state shown in FIG.
As shown in (b), the wire 46 and the wire fixing hole 57
The rising portion 73 rises via the. At the same time, with the fixed side of the spring 74 as a fulcrum, the raised portion 73 is
And the treatment tool can be tilted to the center of the visual field.
When the treatment instrument raising lever 37 is released, the raising portion 73 is inverted by the elastic force of the spring 74.

In this embodiment, the configuration is very simple, the diameter can be easily reduced, and the device can be manufactured easily and inexpensively. Further, in this embodiment, since the raising part 73 is inverted only by releasing the treatment instrument raising lever 37, the burden on the operator during use of the endoscope can be reduced.

Further, in the present embodiment, as in the first and second embodiments, the inclination of the treatment instrument table is reliably regulated by the wall 41a, so that a constant inclination is always realized regardless of the hardness of the treatment instrument. This makes the operation easier for the operator.

Further, in this embodiment, since the spring 74 has an elastic force, the raised portion 70 is inverted only by releasing the wire 46 after being raised, so that the operator's fatigue can be reduced.

In this embodiment, the raised portion 7 of the treatment tool table 72 is used.
3 and the hand-side fixing portion 75 may be formed of either a metal or a polymer material, and an inexpensive endoscope can be provided.

FIG. 20 is a top view of a cover tip constituting portion according to a fourth embodiment of the present invention.

The end portion 31 of the endoscope cover 3 shown in FIG.
6. In addition, the same configurations and operations as those of the first embodiment are denoted by the same reference numerals, and the description and other drawings are omitted.

The treatment tool base 76 has a shaft 77 projecting from the hand side at right angles to the axial direction of the endoscope cover 3.
The shaft 77 is located in the channel opening 35, and both ends are rotatably supported by the cap 40 and the rigid body 41. Further, as shown in FIG. 20, the shaft 77 has an elastic body wrapping member 78 formed integrally therewith.

An elastic body fixing portion 79 is provided on the inner surface at the distal end side of the cap 40, and one end of a thread-like elastic body 81 is inserted and fixed into a hole 80 of the elastic body fixing portion 79, while the other end is an elastic body winding member. It is slightly wound around 78 and fixed.

In the above-described configuration, the treatment tool raising lever 37 is operated to pull the wire 46, so that the treatment tool table 7 is
6 rises, and at the same time, the elastic body 81
8 rolls.

When the treatment instrument raising lever 37 is released, the treatment instrument table 76 is inverted by the restoring force of the elastic body 81 which is wound and pulled.

The effect of this embodiment is the same as that of the third embodiment.

FIG. 21 is a top view of a cover tip constituting section according to a fifth embodiment of the present invention.

The cover distal end portion 31 of the endoscope cover 3 shown in FIG.
Two. In addition, the same configurations and operations as those of the first embodiment are denoted by the same reference numerals, and the description and drawings are omitted.

The treatment tool base 82 has a shaft 83 projecting from the hand side at right angles to the axial direction of the endoscope cover 3. The shaft 83 is located in the channel opening 35, and both ends are rotatably supported by the cap 40 and the rigid body 41.

The inner surface on the distal end side of the cap 40 and the distal end of the treatment tool table 82 are connected by a sheet-like elastic body 84.

In the above configuration, by operating the treatment tool raising lever 37 and pulling the wire 46, the treatment tool table 82 rises while stretching the elastic body 84. When the treatment instrument raising lever 37 is released, the elastic body 84 is restored by the restoring force.

The effects of this embodiment are the same as those of the third and fourth embodiments.

Although all of the above-described embodiments and modifications are applicable to a cover-type endoscope, they can be similarly applied to a conventional reuse type (without cover) endoscope. Needless to say. In addition, each of the above
In Examples and Modifications, the distal end of the endoscope cover is
Cover glass on the left side when viewed from the top of the cover glass,
Although the treatment tool table is arranged on the right side,
The treatment tool stand is on the left and the cover glass is on the right.
It also has the same effect as that described above.

FIGS. 22 to 24 show a sixth embodiment.
FIG. 22 (a) is a diagram showing the configuration of the near side of the cover type endoscope, and FIG.
2 (b) is a sectional view taken along the line BB of FIG. 2 (a), FIG. 23 is a detailed configuration diagram of the treatment instrument raising lever, and FIG. 24 is a detailed view of the attachment of the lever and the wire support member.

The present embodiment relates to the near-side configuration of a cover-type endoscope. FIG. 22 shows the near side of the endoscope cover 3 and the operation unit 13. Otherwise, the configuration on the tip side is the same as that of the first embodiment, and description and drawings are omitted.

As in the first embodiment, the proximal end of the wire 46 extending from the wire outlet 85 opening to the proximal side of the endoscope cover 3 is an insulating material to which the wire support member 56 is fixed. Consists of The wire support member 56 is attached to a holder 86 of a treatment instrument raising lever 37A detachable from the operation section 13. The wire outlet 85
The wire 46 is covered by a wire guide 87 between the wire support member 56 and the wire support member 56. The wire guide 87 is formed of an insulating material. The wire guide 87 is connected to the wire insertion portion 88 extending in the axial direction of the endoscope cover 3, and is connected to the wire insertion portion 88.
And a U-shaped mounting portion 89 that can be fitted into the mounting portion 3. still,
The inner diameter of the conduit of the wire insertion portion 88 is determined by the wire support member 5.
6, the wire guide 87 is detachable from the wire 46.

As shown in FIGS. 23 and 24, the holder 86 has a mounting groove 91 into which the small-diameter portion 90 of the wire support member 56 can be fitted. The outer diameter a of the small-diameter portion 90 is formed to be larger than the inner diameter b of the mounting groove 91, and is attached by utilizing the elastic deformation of the mounting groove 91.

The length c of the small-diameter portion 90 is slightly larger than the length d of the holder 86, and is formed with almost no gap. The length of the small diameter portion 90 is increased by the length c so that the wire 46 is not pulled by the bending operation of the endoscope and the treatment instrument table is raised.
A large gap may be formed between the small diameter portion 6 and the small diameter portion 90.

Further, the treatment instrument raising lever 3 shown in FIG.
The center of rotation of 7A is the same as the center of rotation of the vertical amble knob 92 and the left / right angle knob 93 of the cover endoscope, and the treatment tool lever 37A, the vertical angle knob 92, and the left / right angle knob 93 are provided. Are freely rotatable with respect to other levers and knobs.

An O-ring 95 is provided on the inner peripheral surface of the treatment instrument raising lever 37A so as to slidably contact the fixed shaft 94. The O-ring 95 can hold the treatment instrument raising lever 37A with respect to the fixed shaft 94 due to the sliding resistance. The vertical angle shaft 96 and the horizontal angle shaft 97 can freely rotate with respect to the fixed shaft 94, respectively. The vertical angle shaft 96 and the vertical angle knob 92 operate integrally, and the left and right angle shafts 97 and The left and right angle knobs 93 are integrally operated.

In the above configuration, by turning the treatment instrument raising lever 37A counterclockwise, the wire 46 is pulled and the treatment instrument table is raised, and conversely, the wire 46 is relaxed by rotating clockwise. The treatment tool table is inverted. When the endoscope cover 3 is discarded, the wire support member 56 is attached to the holder 8.
6 and then remove the wire guide 87.

In this embodiment, as in the case of the conventional endoscope without a cover, the treatment instrument raising lever 37A is fixed to the same center of rotation as the vertical angle knob and the horizontal angle knob. Can be used without.

In the present embodiment, the wire 46 drawn out from the wire outlet 85 is inserted through the wire guide 87. Therefore, even if the wire 46 is a conductor, the wire insertion portion 88 is made of an insulator. , Electrical safety can be improved.

In the above embodiment, the wire 46 slides inside the wire insertion portion 88, but the wire 46 and the wire insertion portion may be integrated. In this case, the wire support member 5
6, the wire insertion portion 88, and the exposed wire 4
6 may be entirely made of an insulating material, which can further improve electrical safety.

FIG. 25 is a diagram showing the configuration of the near side of a cover type endoscope according to the seventh embodiment. In addition, the same configurations and operations as those of the sixth embodiment are denoted by the same reference numerals, description thereof will be omitted, and only different points will be described.

The proximal end of the wire 46 is fixed to the arm 98 of the treatment instrument raising lever 37B having elasticity.
The treatment instrument raising lever 37B has a mounting groove 99 that can be mounted on the fixed shaft 94 of the operation section 13 from the side. The entrance width e of the mounting groove 99 is slightly smaller than the outer diameter f of the fixed shaft 94. When the treatment instrument raising lever 37B is mounted, the mounting groove 99 is elastically spread and mounted on the fixed shaft 94. Therefore, the treatment instrument raising lever 37 does not come off the fixed shaft 94 unless it is forcibly removed.

The operation of this embodiment is the same as that of the sixth embodiment. However, when discarding the endoscope cover 3, the treatment instrument raising lever 37 is pulled off from the fixed shaft 94 and discarded together with the endoscope cover 3.

In this embodiment, since the wire 46 and the treatment instrument raising lever 37B are integrated, the endoscope cover 3
At the same time, the treatment instrument raising lever 37 is discarded, and the operation section 13 can be kept clean at all times, so that the operation section 13 does not need to be washed or disinfected.

In this embodiment, the treatment instrument raising lever 3
7B can be attached and detached from the side of the fixed shaft 94, so that preparation for attachment before use of the endoscope, removal after use,
Very easy to destroy.

In this embodiment, as in the previous embodiment, the wire 46 and the treatment instrument raising lever 37B may be configured to be detachable.

FIG. 26 is a configuration diagram according to a modification of the seventh embodiment. The arm 98 is provided in a direction opposite to that of FIG. This configuration also has the same operation and effect as the above embodiment.

FIGS. 27 and 28 are side views showing another configuration of the treatment instrument raising lever of the insertion portion cover portion, and FIG. 28 is a sectional view showing the configuration of the treatment tool raising lever.

This embodiment is another configuration example of the treatment instrument raising lever. FIG. 27 and FIG.
The treatment instrument raising lever 173 is shown together with the wire 8 and the like inside the mouth portion 33 and the like. Only the parts of the configuration of the present embodiment that differ from the first embodiment will be described. In addition, the same configurations and operations as those of the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

The treatment instrument raising lever 173 is connected to the mouth 3
3, a knob 174 having an outer surface knurled or the like, and a male screw portion 175 integrally formed on the tip side of the knob 174. As shown in FIG. 28, the male screw part 175 is provided in the mouth part 33. In the protruding portion 172 provided at the proximal end of the mouth portion 33,
A female screw portion 176 into which the male screw portion 175 can be screwed is formed. The male screw portion 175 is rotatably housed in the female screw portion 176. Male thread 1
A wire connection portion 177 that rotatably houses the wire support member 56A fixed to the end of the wire 46 is provided at the tip of the wire 75.
Has been fixed.

In the above configuration, by turning the knob 174 clockwise or counterclockwise, the male screw portion 17 is rotated.
5 advances and retreats with respect to the female screw portion 176, advances and retreats the wire 46, and inverts or raises the treatment tool table connected to the distal end of the wire 46. Since the wire supporting member 56A is rotatable with respect to the wire connecting portion 177, the wire 46
Is moved forward and backward without twisting.

In this embodiment, since the treatment instrument raising lever 173 can be formed with a very simple structure, an inexpensive endoscope can be provided.

FIGS. 29 to 31 relate to the eighth embodiment.
FIG. 29 is a detailed cross-sectional view of a mouth part including a treatment instrument raising lever,
30 is a sectional view taken along line FF of FIG. 29, and FIG.
It is an arrow view of a direction.

This embodiment relates to the treatment instrument raising lever in the same manner as in the configuration of FIGS. 27 and 28.
Only the parts different from the configuration of FIG. 8 are shown.

The treatment instrument raising lever 178 shown in FIG.
A female member 179 penetrates the center and is a circular member with a knurled outer periphery. A wire support member 182 having a male screw portion 180 screwed to the female screw portion 179 on the distal end side and having a rotation stop 181 at the proximal end is rotatably held by the female screw portion 179. This wire support member 182
Is fixed to one end of a wire 46. A treatment tool table is fixed to the other end of the wire 46.

The treatment tool raising lever 178 has a part of the outer periphery exposed to the outside through a cutout 183 provided in the mouth part 33. Also, as shown in FIG. 30, the width of the groove 184 formed from the female screw portion 179 of the treatment instrument raising lever 178 to the outer periphery is:
The diameter is slightly larger than the outer diameter of the wire 46 so that only the wire 46 can pass through. Therefore, after the wire 46 is passed through the groove 184, the female screw portion 179 is rotated with respect to the male screw portion 180, so that the male screw portion 180 is screwed into the female screw portion 179.

The rotation stopper 181 is formed in a rectangular shape as shown in FIG.
Is held. Therefore, the wire support member 182 is not rotated by rotating the treatment instrument raising lever 178, and the wire 46 is moved forward and backward.

In the above configuration, when the treatment instrument raising lever 178 is rotated clockwise or counterclockwise, the wire support member 182 and the wire 46 connected thereto move forward and backward, and are connected to the distal end of the wire 46. The treatment tool stand is turned over or rises.

The effects of the present embodiment are the same as those of the configurations of FIGS. 27 and 28.

FIG. 32 is a view showing the construction of a treatment instrument raising lever and its drive according to the ninth embodiment.

Most of the present embodiment has the same configuration as that of FIGS. 27 and 28, and only different portions will be described. Other configurations and operations similar to those in FIGS. 27 and 28 are denoted by the same reference numerals and description thereof is omitted.

The male screw portion 17 exposed from the mouth portion 33
A connection member 186 having a polygonal cross-section is fixed to the proximal side of 5, and a coupling 188 fixed to one end of a flexible shaft 187 is fitted to the connection member 186. A motor 1 for rotating the flexible shaft 187 is provided at the other end of the flexible shaft 187.
89 is fixed. The motor 189 is driven by a control unit 191 having a treatment instrument raising lever 190.

In the above configuration, the electric signal for driving the motor 189 is sent from the control unit 191 by operating the treatment instrument raising lever 190, and the motor 189 is driven to rotate the flexible shaft 187 to advance and retreat the male screw portion 175. Then, the treatment tool stand is inverted or raised.

In the present embodiment, since the treatment tool table is raised by an electric drive, the treatment tool table is always raised or inverted at a constant speed, so that there is no sudden rise that may damage the treatment tool, and the stable. Can operate.

The control unit 191 and the treatment instrument raising lever 190 may be provided integrally with the operation section of the endoscope.
Alternatively, the treatment instrument raising lever may be a foot switch.

FIGS. 33 and 34 show examples of the structure of the flexible tube of the endoscope insertion portion. FIG. 33 is an internal configuration diagram of a flexible tube,
FIG. 34 is a sectional view of the flexible tube.

FIGS. 33 and 34 show a flexible tube inserted into the endoscope insertion section 12 of the insertion section cover 18 of the cover endoscope 4. FIG. The insertion portion of the endoscope 4 is inserted into the endoscope insertion portion 12 of the insertion portion cover 18 which is isolated from the air supply conduit 25, the water supply conduit 26, and the treatment instrument channel 53. The endoscope insertion section 12 desirably has a D-shaped cross section in order to reduce dead space. Therefore, the flexible tube of the endoscope 4 for a cover also preferably has a D-shaped cross section.

The inside of the flexible tube of FIG. 33 is formed by connecting a pipe 192 having a D-shaped cross section with a flexible wire 193 to the connecting portion 1.
At 94, the connection is fixed. FIG. 34 shows a flexible tube 1 obtained by covering the outside of the pipe 192 and the wire 193 of FIG. 33 with a braided mesh wire 195 formed by knitting a metal wire in a cylindrical shape, and further covering the outer periphery thereof with a polymer resin 196.
97 is shown.

By configuring the flexible tube 197 as described above, it is possible to provide a flexible tube with little abnormality in flexibility and without damaging the built-in light guide fiber or the like.

FIG. 35 shows another example of the structure of the flexible tube. FIG. 35A is an internal configuration diagram of the flexible tube, and FIG. 35B is a diagram viewed from an arrow H in FIG.

The flexible tube shown in FIGS. 35 (a) and (b)
A large number of pattern coils 198 are connected and fixed with connecting portions 199. When the D-shaped coil 198 is viewed from the arrow H direction, it is D-shaped as shown in FIG. By coating the D-coil 198 connected in this way with the blade 195 and the polymer resin 196 shown in FIG. 34, a flexible tube having appropriate flexibility can be obtained.

FIG. 36 shows another example of the configuration of the cover endoscope and the insertion portion cover.

The mouth part 33A of the insertion part cover part 18A has a female screw part 200 on the inner periphery, and the mouth part connecting part 201 of the cover endoscope has a male screw part 202 fitted with the female screw part 200.
have. Here, the insertion portion 1 of the endoscope for cover
Length L from the tip of 2A to the tip of mouth connection part 201
The relationship between the length m of the insertion portion cover portion 18A and the mouth portion 33A is L> m, thereby shortening the mouth portion connection portion 201 of the operation unit 13 and efficiently attaching the cover. .

FIG. 37 shows another example of the structure of the cover holder.

The cover holder 6A shown in FIG. 37 has an arm bar 6b protruding from a stand 6a. The arm bar 6a protrudes a ring 6c at the tip and a support arm 6d holding the cover-type endoscope 2 halfway.

The holding rope 20 is attached to the ring 6c of the arm 6a.
One end of the endoscope 3 is fixed, and the other end of the rope 203 fixes the tip of the cover type endoscope 2 held by the support arm 6d. The cover endoscope 2 must be clean until inserted into the patient. However, since the endoscope 2 is generally long, if the cover type endoscope 2 is hung on the cover holder 6, the end of the endoscope cover 3 may touch the floor and become dirty. Therefore, by holding the endoscope cover 3 with the disinfected and sterilized support arm 6d as shown in FIG. 37, the cover type endoscope can be kept clean.

In each of the above embodiments and modifications,
The endoscope is not limited to the electronic type, but may be an optical fiber endoscope, and is not limited to a cover type or the like. That is, the present invention is not limited to the type of endoscope.

[0155]

According to the present invention, the treatment tool base is formed of a flexible member and at least one hinge portion is provided, so that the treatment tool table is bent by deformation of the hinge portion. Thus, the deformed portion is limited to the hinge portion, and there is an effect that the entire treatment tool table is not elastically deformed, that is, the torsion of the treatment tool table is small, and the treatment tool can be reliably projected in the target direction.

[Brief description of the drawings]

FIGS. 1 to 8 relate to a first embodiment, and FIG. 1 is an overall configuration diagram of an endoscope apparatus.

FIG. 2 is a configuration diagram of an insertion unit cover.

FIG. 3 is a configuration diagram of a cover endoscope in a state where an insertion portion cover is mounted.

FIG. 4 is a perspective view showing a configuration of a cover leading end component.

FIG. 5 is a side sectional view of a distal end side of an insertion portion cover portion.

FIG. 6 is a side sectional view of a hand side of an insertion portion cover portion.

FIG. 7 is a configuration diagram of a treatment tool stand.

FIG. 8 is an explanatory view of the operation of the treatment tool stand.

9 (a) is a front view of the distal end showing the positional relationship between the treatment tool table and the hard portion main body, FIG. 9 (b) is a view in the direction of arrow C in FIG. 9 (a), and FIG. FIG. 4D is a front view of the distal end side in a state where it is raised, and FIG.

10A is a side view of a treatment tool table according to a first modification, and FIG. 10B is a cross-sectional view taken along line EE of FIG. 10A.

11 and 12 relate to a second modification, and FIG.
1 is a top view of a treatment tool stand.

FIG. 12 is a side view of a treatment tool stand.

FIG. 13 is a configuration diagram of a treatment tool table according to a third modification.

FIG. 14 is a configuration diagram of a treatment tool table according to a third modification.

15 to 17 relate to a second embodiment, and FIG. 15 is a top view of a treatment tool table.

FIG. 16 is a top view showing the operation of raising the treatment tool base.

FIG. 17 is a side view of a treatment tool stand.

18 and 19 relate to a third embodiment, and FIG.
8 is a configuration diagram of a treatment tool stand.

FIG. 19 is an explanatory view of the operation of the treatment tool stand shown in FIG. 18;

FIG. 20 is a top view of a cover tip constituting section according to a fourth embodiment.

FIG. 21 is a top view of a cover tip constituting section according to a fifth embodiment.

FIGS. 22 to 25 relate to the sixth embodiment, and FIG. 22 (a) is a diagram showing a hand side configuration of a cover type endoscope, and FIG. 22 (b).
2 is a sectional view taken along line BB of FIG.

FIG. 23 is a detailed view of a treatment instrument raising lever.

FIG. 24 is a detailed view of the attachment of the lever and the wire support member.

FIG. 25 is a diagram showing the configuration of the proximal side of a cover-type endoscope according to a seventh embodiment;

FIG. 26 is a configuration diagram according to a modification of the seventh embodiment.

FIG. 27 is a side view showing another configuration of the treatment instrument raising lever.

FIG. 28 is a sectional view showing a detailed configuration of the lever shown in FIG. 27;

29 to 31 relate to the eighth embodiment, and FIG. 29 is a detailed sectional view of a mouth portion including a treatment instrument raising lever.

FIG. 30 is a sectional view taken along line FF of FIG. 29;

FIG. 31 is a view in the direction of arrow G in FIG. 29;

FIG. 32 is a configuration diagram relating to a treatment instrument raising lever and its drive according to a ninth embodiment.

FIG. 33 is a configuration diagram showing the inside of a flexible tube of the endoscope insertion section.

FIG. 34 is a cross-sectional view of a flexible tube.

FIG. 35 (a) is an internal configuration diagram of another flexible tube,
(B) is an arrow view in the H direction of (a).

FIG. 36 is another configuration diagram of the cover endoscope and the insertion portion cover portion.

FIG. 37 is another configuration diagram of the cover holder.

[Explanation of symbols]

 2 ... Cover type endoscope 3 ... Endoscope cover with channel 37 ... Treatment tool raising lever 44 ... Treatment tool stand 46 ... Wire 58 ... Groove 59 ... Hinge 4 ... Endoscope for cover

Claims (1)

(57) [Claims] 1. An insertion part to be inserted into a subject, a tip part provided at a tip of the insertion part, and a part which is inserted through the insertion part and protrudes from the tip part.
Flexible to guide the fixture in the desired direction
A treatment tool table formed of a material, and a fixing unit for fixing a base end of the treatment tool table to the distal end component unit
And , at the side of the distal end of the treatment tool table, the distal end is
And is extended into the insertion portion and pulled / retracted from the proximal end side.
Raising operation that raises and inverts the treatment instrument table by a relaxation operation
Operating wire, and provided on the treatment tool table, in accordance with a raising operation of the treatment tool table.
Formed with a thin-walled part that bends in the direction in which the treatment tool table is raised.
An endoscope characterized by comprising a hinge portion which is.