JPH06254037A - Endoscope cover with channel - Google Patents

Abstract

PURPOSE:To improve the workability at the time of mounting the endoscope cover to the endoscope of the endoscope cover type having a disposing means raising device for raising the disposing means, etc., inserted into a channel. CONSTITUTION:The endoscope cover with the channel having the disposing means channel to be mounted into the endoscope for the cover has an insertion part cover part 18 for covering the insertion part of the endoscope. This insertion part cover part 18 has the disposing means raising device for moving the disposing means projecting from the channel aperture 35 of a front end constituting part 31 inserted with the disposing means channel and is disposed with a disposing means raising lever 37 for actuating the disposing means raising device in a mouth body part 33 for fixing the endoscope operating part provided at the base end.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an endoscope cover with a channel which has at least one channel including a treatment tool channel through which a treatment tool such as forceps is inserted and which covers an insertion portion of the endoscope.

[0002]

2. Description of the Related Art In recent years, endoscopes have been widely used in the medical field and the like. When an endoscope used in the medical field is inserted into a living body, the observation window provided at the distal end portion of the insertion portion may not be sufficiently observed due to adhesion of body fluid or the like. For this reason, the endoscope is provided with an air supply conduit or a water supply conduit so that the observation window can be sprayed with a fluid such as a cleaning liquid or a cleaning gas to remove the body fluid or the like adhering to the observation window by the operation on the near side. Has been. Further, there is also a device provided with a suction pipe line for sucking and discharging unnecessary body fluid and the like. In addition, there is one in which a treatment instrument channel is provided so that a tissue can be collected with a biopsy forceps or a treatment treatment with a treatment instrument can be performed.

For endoscopic examination, it is necessary to use a clean endoscope that has been thoroughly washed and disinfected before the examination.

Therefore, in the case of an endoscope provided with a conduit such as the air supply conduit or a treatment instrument channel, when it is used for a patient or the like, cleaning or sterilization treatment must be performed in order to reliably prevent infections and the like. Is given. However, it takes a long time to completely perform cleaning or sterilization, so that there is a problem that the use efficiency of the endoscope is lowered.

Therefore, by using the endoscope itself in a state of being covered with the endoscope cover provided with the air / water supply conduit, etc., only the endoscope cover is replaced as a disposable after use, and after use. In particular, there has been proposed an endoscope cover-type endoscope apparatus that does not require cleaning or sterilization to prevent the endoscope itself from becoming unclean.

As an endoscope apparatus of an endoscope cover system,
For example, Japanese Patent Publication No. 2-54734, U.S. Pat. No.
Japanese Patent Laid-Open No. 3,162,190 discloses a device in which an endoscope insertion portion is inserted into a cover, and the endoscope insertion portion is covered with the cover so as to be insulated from an external environment.

The endoscope of the endoscope cover type as described above is
The insertion part is cleaned or sterilized and disinfected in advance. Then, with the endoscope cover covering the insertion portion of the endoscope, the endoscope is inserted into the body cavity of the patient for inspection and treatment, and after use, the endoscope cover is removed and discarded. I will end up. In this way, by disposing the endoscope cover for each patient, the endoscope does not need to be washed and disinfected,
It can be kept clean at all times and is very convenient. And
The endoscope can be used continuously without re-cleaning and re-disinfecting.

[0008]

However, in the endoscope device of the endoscope cover type as described above, the one using the front direct-viewing type endoscope is the mainstream, and the side-viewing type endoscope is conventionally used. No proposals have been made for those using endoscopes.

In a side-view type endoscope, an observation window and an illumination window are provided laterally at the tip of the insertion portion. When applied to an endoscope cover system, the structure of the endoscope cover is used. In particular, in an endoscope cover with a channel provided with channels such as an air / water feeding conduit, a suction conduit, and a treatment instrument channel, the configurations of the channel, the observation window, the illumination window, etc. are different.

For example, in a side-view type endoscope provided with a treatment instrument channel or the like, a treatment instrument raising device for raising the tip of the treatment instrument such as forceps inserted in the treatment instrument channel is provided. Due to its complicated shape and mechanism, the treatment instrument raising device has not been easy to dispose on the endoscope cover.

When providing a treatment instrument raising device to an endoscope of an endoscope cover system, for example, like a normal endoscope which is repeatedly used after being subjected to sterilization treatment, the treatment instrument raising device is attached to an operation portion of the endoscope. When the treatment device raising lever for operating the upper device is installed,
When mounting the cover on the cover endoscope, complicated connection work such as connecting a treatment instrument raising wire for connecting the treatment instrument raising lever and the treatment instrument raising base to the operation portion is required. There is a point.

The present invention has been made in view of these circumstances, and an endoscope of the endoscope cover system provided with a treatment instrument raising device for raising a treatment instrument or the like inserted in a channel is used. It is an object of the present invention to provide a channel-equipped endoscope cover that can improve workability when mounting the mirror cover.

[0013]

A channel-equipped endoscope cover according to the present invention has a treatment instrument channel through which a treatment instrument is inserted, and a treatment instrument which is inserted into the treatment instrument channel and protrudes from a distal end portion is predetermined. Is a endoscope cover that covers at least the insertion portion of the endoscope, which includes a treatment instrument raising device that moves the treatment instrument raising device to the position of the insertion portion cover portion that covers the insertion portion of the endoscope. An endoscope operating portion fixing mouth portion for fixing the operating portion of the endoscope is provided, and the endoscope operating portion fixing mouth portion is connected to the treatment instrument raising device and is connected to the treatment instrument raising device. A treatment tool raising device actuating member to be actuated is provided.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 7 relate to a first embodiment of the present invention, FIG. 1 is an explanatory view showing the overall configuration of an endoscope cover type endoscope apparatus, and FIG. 2 is a perspective view showing the overall configuration of an endoscope cover. FIG. 3, FIG. 3 is a perspective view showing a state in which the endoscope cover is attached to the cover endoscope, FIG. 4 is a perspective view showing a configuration of a distal end portion of the endoscope cover, and FIG. 5 is a distal end of the endoscope cover. 6 is a cross-sectional view showing the configuration of a portion of the endoscope cover, FIG.
FIG. 7 is a perspective view showing the configuration of the treatment instrument raising operation mechanism.

As shown in FIG. 1, an endoscope cover type endoscope apparatus 1 has an endoscope cover type endoscope (hereinafter referred to as a cover type endoscope) 2. The cover-type endoscope 2 includes a channel-equipped endoscope cover (hereinafter referred to as an endoscope cover) 3 provided with channels such as an air / water supply conduit, a suction conduit, and a treatment tool channel. The endoscope cover 3 is attached to the endoscope cover 3 (hereinafter, referred to as a cover endoscope) 4 in combination. When performing an endoscopic inspection, the insertion portion of the cover endoscope 4 and the like are covered with the clean endoscope cover 3, and the endoscope cover 3 is discarded after the inspection. The mirror 4 is characterized by being covered with a new clean endoscope cover 3 and used repeatedly. This makes it unnecessary to clean and disinfect the endoscope after the inspection.

The endoscope system 1 includes the cover type endoscope 2, a cart 5 in which various peripheral devices to which the cover type endoscope 2 is connected are installed, and the cover type endoscope. It has a cover holder 6 for holding the mirror 2.

The cart 5 has, 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 endoscope 4 for the cover is attached to the endoscope cover 3). , Abbreviated as dilator) 10 and the like. Further, on the upper surface of the cart 5, a monitor 11 that receives a video signal from the video processor 8 and displays an endoscopic image is placed.

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

The light source device 7 is detachably connected to the cover endoscope 4 through the connector 15 and supplies illumination light to the endoscope. Further, the video processor 8 is detachably connected to the cover endoscope 4 via a signal cable 16 extending from a side portion of the connector 15, and drives an image pickup means built in the cover endoscope 4. , And the signal output from the image pickup means is converted into a standard video signal and output to the monitor 11.

An extension tube 17 is connected to the dilator 10, and the endoscope cover 3 is connected via the extension tube 17.
This is for injecting air into the interior to expand the endoscope cover 3 so that the endoscope 4 for the cover can be easily attached or removed. When attaching or detaching the endoscope cover 3 to or from the cover endoscope 4, a cover holder 6 is used. For example, the cover holder 6 holds the proximal end side of the endoscope cover 3 to cover the endoscope. The mirror 4 is inserted or removed.

The endoscope cover 3 comprises a flexible insertion section cover section 18, an operation section cover section 19 and a universal cord cover section 20 which are made of a thin and soft polymer material such as vinyl chloride. The endoscope insertion portion 12, the operation portion 13, and the universal cord 14 of the cover endoscope 4 are respectively covered.

The fluid control device 9 is provided with an air supply control valve 21, a water supply control valve 22, and a suction control valve 23, and supplies air, water,
The suction is controlled by these solenoid valves. The air supply control valve 21, the water supply control valve 22, and the suction control valve 23 are connected to an air supply pipe line 24, a water supply pipe line 25, and a suction pipe line 26 extending from the insertion section cover portion 18, respectively.

The suction control valve 23 has a suction tube 2
7 is connected, and an aspirator (not shown) is connected to the end of the endoscope 7, so that unnecessary body fluid or the like is sucked from the tip of the endoscope. A water supply tube 28 is connected to the water supply control valve 22, and a water supply tank 29 is connected to the tip portion thereof. Further, two air supply tubes 30 extend from the fluid control device 9 and are connected to the air supply control valve 21 and the water supply tank 29.

FIG. 2 shows the insertion portion cover portion 1 of the endoscope cover 3.
8 shows an overall configuration of No. 8. The insertion portion cover portion 18 is an endoscope operation portion fixing mouth portion (hereinafter referred to as a mouth portion) for connecting and fixing the cover tip constituent portion 31, the cover outer skin 32, and the operation portion 13 of the endoscope from the front end side. 33) are connected airtightly. The cover tip forming portion 31 is provided with an observation opening 34 and a channel opening 35.
A transparent cover glass is provided in the observation opening 34,
The observation window and the illumination window of the endoscope inserted inside the cover face each other, and irradiation of illumination light toward the examination site and observation of the examination site can be performed.

The mouth portion 33 has a treatment instrument insertion port 36 communicating with a treatment instrument channel provided therein, and a tip of a treatment instrument such as forceps inserted from the treatment instrument insertion port 36 into the treatment instrument channel. A treatment instrument raising lever 37 as a treatment instrument raising device operating member for operating the treatment instrument raising device for raising the portion is provided.

FIG. 3 shows a state in which the endoscope cover 3 is attached to the cover endoscope 4. After inserting the insertion section 12 of the cover endoscope 4 into the insertion section cover section 18, covering the operation section 13 of the endoscope with the operation section cover section 19, and covering the universal cord 14 with the universal code cover section 20, Each part of the cover endoscope 4 is fixed to the endoscope cover 3 by winding the fixing tape 38 around the joint between the cover parts and fixing the fixing tape 38.
(The insert section cover section 18, the operation section cover section 19, the universal cord cover section 20) is airtightly covered so as to be isolated from the external environment.

FIG. 4 shows the structure of the distal end forming portion 31 of the endoscope cover. The tip forming portion 31 is made of a hard resin or the like, and communicates with an endoscope insertion channel provided in the insertion portion cover portion 18, and an endoscope leading end insertion hole 41 into which the endoscope leading end fits, A channel distal end portion 42 communicating with the treatment instrument channel is provided, and the distal end portion of the treatment instrument channel is opened to the outside from the channel opening portion 35. Observation opening 34 on the side of the endoscope distal end insertion hole 41
Is provided with a cover glass 43, which allows light to pass therethrough and isolates the distal end portion of the endoscope from the external environment.

The tip portion of the insertion portion cover portion 18 of the endoscope cover including the tip forming portion 31 has a structure shown in FIG. 5 when shown in a sectional view in the axial direction.

A channel tube 45 that constitutes a treatment instrument channel 44 is inserted into the insertion portion cover portion 18, and the distal end portion of the channel tube 45 is connected to the distal end forming portion 31 and is provided in the distal end forming portion 31. To the channel end portion 42. A treatment instrument raising base 46 for raising the treatment instrument inserted through the treatment instrument channel 44 is rotatably installed at the channel tip portion 42. The treatment instrument raising base 46 has a base end portion fixed by a rotation shaft 47 so that the treatment instrument raising base 46 can be rotated in the channel distal end portion 42 around the base end portion. A raising wire 48 for raising and lowering the raising base 46 by pulling is connected. This raising wire 48
Is inserted into the insertion portion cover portion 18, passes through the inside of the wire tube 49 connected to the distal end forming portion 31 at the front end portion, and extends to the endoscope operation portion fixing mouth portion 33 at the rear end side.

Although not shown, the insertion portion cover portion 18
Inside the channel tube 45 of the treatment instrument channel 44
An endoscope insertion channel is provided almost in parallel with, and the cover endoscope 4 is inserted.

The rear end portion of the insertion portion cover portion 18 of the endoscope cover 3 is constructed as shown in FIG.

A rear end portion of the channel tube 45 and a wire tube 49 is connected to an endoscope operation portion fixing mouth portion 33 provided at a rear end portion of the insertion portion cover portion 18. The channel tube 45 communicates with the treatment instrument insertion port 36 inside the mouth portion 33. Also, wire tube 4
Raising wire 48 extending into the mouth 33 through the inside 9
Has a wire support member 50 fixed to its rear end. A treatment instrument raising lever 37 is connected to the wire supporting member 50. By operating the treatment instrument raising lever 37, the wire supporting member 50 moves back and forth within the mouth 33 in a predetermined range. It is designed to move in the direction.

FIG. 7 shows the construction of the treatment instrument raising operation mechanism including the treatment instrument raising lever 37 and the wire supporting member 50.

The wire support member 50 connected to the rear end of the raising wire 48 is formed of a large diameter portion 51 and a small diameter portion 52. Further, a cutout groove portion 53 is provided at the tip of the raising lever 37, and the cutout groove portion 5 is provided.
The small diameter portion 52 of the wire support member 50 is engaged with the inside of the wire 3. The dimensions of the notch groove portion 53 and the small diameter portion 52 are set so that there is a clearance between the notch groove portion 53 and the small diameter portion 52.

The treatment instrument raising lever 37 is rotatably fixed to the mouth portion 33 about a rotary shaft 54 as a fulcrum. By operating the raising lever 37, the raising lever 37
Of the wire supporting member 50 moves in the small diameter portion 52 of the wire supporting member 50 and pushes the large diameter portion 51 of the supporting member.
Is driven in the front-back direction. This allows
The raising wire 48 is pulled and loosened so that the treatment instrument raising base 46 at the tip of the cover is raised and inverted.

In the endoscope apparatus 1 of the endoscope cover type of this embodiment, when the endoscope is used, a sterilized and clean endoscope cover 3 is attached to the cover endoscope 4. The cover-type endoscope 2 in a state where the cover endoscope 4 is isolated from the external environment is inserted into a site to be inspected such as inside a body cavity. Therefore, when the endoscope is used, the cover endoscope 4 is covered with the endoscope cover 3 and is not exposed to the outside, so that a clean state is maintained. Further, the air supply conduit, the water supply conduit, and the treatment instrument channel 44 are provided on the endoscope cover 3 side, and after use, they are discarded together with the endoscope cover 3 and sterilized. Since the covering endoscope 4 is covered with 3, the contaminated conduit is not reused.

By constructing the cover type endoscope 2 in this way, the cover endoscope 4, which is the endoscope body, does not need to be washed or sterilized at each inspection, and is always kept clean. Therefore, endoscopy can be performed easily. The cover endoscope 4 can be continuously used without re-cleaning and re-disinfecting, and for example, cleaning, sterilization treatment and disinfection may be performed when all inspections of one day are completed. Therefore, the use efficiency of the endoscope can be improved.

When performing various treatments with the treatment tool during the endoscopic examination, the treatment tool to be used is inserted from the treatment tool insertion port 36 provided in the mouth 33 of the insertion section cover 18, and the treatment tool channel 44 is inserted. The inside of the cover, the cover tip forming portion 31
The distal end portion of the treatment tool is projected from the channel opening portion 35 to reach the target site and treatment is performed.

The endoscope cover of the present embodiment is used for a side-viewing type (side-viewing type) endoscope, and includes a treatment instrument raising base for treating the distal end portion of the treatment instrument to a target portion, and treatment. A treatment tool raising device having a tool raising operation mechanism is provided.

When the treatment instrument inserted through the treatment instrument channel 44 is raised and inverted, by operating the treatment instrument raising lever 37 provided on the mouth portion 33 on the proximal side of the insertion portion cover 18, The raising lever 37 rotates about the rotary shaft 54 as a fulcrum, and the wire support member 50 engaged with the tip of the lever moves in the front-rear direction. As a result, the raising wire 48 having the rear end portion fixed to the wire supporting member 50 is pushed and pulled, and the treatment instrument raising base 46 connected to the tip end portion of the raising wire 48 is raised and inverted.

As described above, in this embodiment, the treatment instrument raising lever is provided at the proximal end portion of the insertion portion cover portion of the endoscope cover, that is, in the vicinity of the operation portion of the endoscope. When attaching to the endoscope for the cover, complicated connecting work such as connecting the raising wire of the treatment instrument raising device to the endoscope operating section can be omitted, and when attaching the endoscope cover. It is possible to improve the workability of.

8 to 11 relate to the second embodiment of the present invention, FIG. 8 is a lateral cross-sectional view showing the structure of the distal end portion of the endoscope cover, and FIG. 9 is a cover for insertion into the endoscope cover. FIG. 11 is an axial cross-sectional view showing the configuration of the tip portion of the endoscope, FIG. 10 is a perspective view showing the external shape of the tip portion of the cover endoscope of FIG. 9, and FIG.
FIG. 8 is a cross-sectional view showing a configuration of a modified example in which the raising direction of the forceps raising base is changed at the distal end portion of the endoscope cover.

The second embodiment is an example of an endoscope cover used for a side-viewing type (side-viewing type) endoscope as in the first embodiment.

The distal end forming portion 61 of the endoscope cover has a first
Similar to the embodiment, an endoscope distal end insertion hole 62 into which the distal end of the endoscope inserted in the endoscope insertion channel inside the cover fits, and a channel distal end 42 communicating with the treatment instrument channel are provided. The distal end portion of the treatment tool channel provided is opened to the outside from the channel opening portion 64. A cover glass 65 is provided in the observation opening on the side of the endoscope distal end insertion hole 62 in correspondence with the positions of the observation window and the illumination window of the endoscope to be inserted. The inside of the endoscope channel including the tip insertion hole 62 is isolated from the external environment and the field of view of the endoscope is secured.

A treatment instrument raising base 66 for raising the treatment instrument inserted through the treatment instrument channel is rotatably disposed at the channel tip portion 42. A raising wire 67 is connected to the treatment instrument raising base 66.
Although not shown in the figure, 7 extends to the endoscope operation portion fixing mouth on the proximal side of the endoscope cover, and the rear end portion is connected to the treatment instrument raising lever as in the first embodiment. By operating the treatment instrument raising lever, the raising wire 67 is pushed and pulled, and the treatment instrument raising base 66 is raised in the direction of the arrow in the drawing and is inverted.

9 and 10 show the structure of the tip portion of the side-view-type cover endoscope to be inserted into this endoscope cover.

A tip forming portion 68 of the insertion portion of the cover endoscope.
As shown in FIG. 9, an illumination window 69 and an observation window 70 are arranged side by side in the axial direction of the insertion section. An illumination optical system 71 is arranged in the illumination window 69, and an emission end of a light guide 72 inserted through the insertion portion is arranged behind the illumination optical system 71. An observation optical system 74 including a prism 73 is arranged in the observation window 70. Behind the prism 73,
An image pickup unit 76 including a solid-state image pickup element 75 is arranged.

The tip forming portion 68 of the cover endoscope is shown in FIG.
As shown in 0, the direction perpendicular to the axial direction of the insertion part (horizontal direction)
Has a substantially semicircular cross section. Tip component 68
Is the longitudinal axis (hereinafter,
It has a side face (face B) substantially perpendicular to the major axis), and the illumination optical system 71 and the observation optical system 74 are arranged on this face B.

The light guide 72 is adapted to be inserted through the universal cord 14 so that its rear end is connected to the light source device 7, and the illumination light from the light source device 7 is directed by the light guide 72 to the tip of the endoscope. Then, the illumination optical system 71 illuminates the site to be inspected with illumination light.

On the other hand, the image incident on the first lens at the tip of the observing optical system 74 is converted by the prism 73 at a substantially right angle and guided to the image pickup unit 76.
Then, the subject image passes through the image forming optical system of the image pickup unit 76 to form an image on the image forming surface of the solid-state image pickup device 75, and is photoelectrically converted in the solid-state image pickup device 75. The image signal of the converted electric signal is sent to the video processor 8, and after various video signal processing is performed by the video processor 8, the monitor 11
Is input to the monitor 11 and the subject image is displayed on the display screen of the monitor 11.

Insertion hole 6 of the endoscope tip portion of the endoscope cover
As shown in FIG. 8, No. 2 has a substantially semicircular cross-sectional shape corresponding to the cross-sectional shape of the distal end portion of the cover endoscope to be inserted. Then, in the distal end forming portion 61 of the endoscope cover, the channel distal end portion 42 is provided in parallel with the endoscope distal end portion insertion hole 62, and the endoscope distal end portion insertion hole 62 is provided.
The treatment tool raising base 66 is arranged at a position substantially parallel to the major axis direction of the semicircular cross section of the above. This treatment tool raising stand 66
Are raised in a direction substantially parallel to the long axis direction of the semicircular cross section of the endoscope distal end insertion hole 62 (direction of arrow in FIG. 8).

As described above, by constructing the endoscope distal end insertion hole 62 of the endoscope cover, the treatment instrument raising base 66, and the distal end forming portion 68 of the cover endoscope, the distal end of the endoscope is inserted. Since the treatment instrument raising base 66 is positioned substantially parallel to the major axis direction of the semicircular cross section of the hole 62 (that is, the major axis direction of the semicircular tip surface of the distal end forming portion 68 of the endoscope), the endoscope. The treatment tool raising base 66 is positioned substantially parallel to the visual field direction of the observation optical system 74, and the visual field direction of the endoscope coincides with the raising direction of the treatment tool. As a result, the position of the treatment tool can be checked while operating, the operability of the treatment tool such as forceps is improved, and safe and reliable treatment can be performed.

The cross-sectional shape of the endoscope tip end insertion hole 62 of the endoscope cover is substantially semicircular, and the treatment instrument channel tip end portion is in the empty space of the endoscope tip end insertion hole. Since they are provided in parallel, the components provided at the distal end of the endoscope cover having a channel can be arranged in a space-efficient manner, and the cover-type endoscope insertion portion using the endoscope cover can be installed. The diameter can be reduced.

Further, according to the structure of this embodiment, the partition wall 7 between the endoscope distal end insertion hole 62 and the channel distal end 42 is formed.
7 (see FIG. 8) is reinforced by inserting the insertion portion of the cover endoscope 4, the treatment instrument raising base 66 and the treatment instrument engaged with the raising base are raised along the partition wall 77. Further, it can be inverted and can act as a guide for a raising operation of the treatment instrument raising base 66 and forceps or the like inserted in the treatment instrument channel 44.

As a modification of the second embodiment, FIG.
As shown in, the distal end forming portion 78 of the endoscope cover can be configured such that the raising direction of the treatment instrument is slightly inclined with respect to the visual field direction of the observation optical system of the endoscope. The distal end forming portion 78 of this modified example is provided with a treatment instrument raising base 66 such that the raising direction is slightly inclined with respect to the long axis direction of the semicircular cross section of the endoscope distal end insertion hole 62.

With this structure, the raising direction of the treatment instrument that is raised and inverted by the treatment instrument raising base 66 is slightly tilted with respect to the visual field direction of the observation optical system of the endoscope, and the treatment instrument is moved inside. Since it will move toward the center of the field of view of the endoscope,
It is possible to more easily operate the treatment tool such as forceps.

12 to 14 relate to the third embodiment of the present invention. FIG. 12 is a side view of the tip portion of the endoscope cover seen from above, and FIG. 13 is a configuration of the tip portion of the endoscope cover. 14 is a sectional view taken along line AA of FIG. 13.

The third embodiment is an example in which the distal end constituent portion of the endoscope cover of the second embodiment is changed. In this embodiment, a front direct-viewing type endoscope is used, and the visual field direction is changed at the tip of the endoscope cover to be mounted to form a side-viewing type cover-type endoscope.

A flat surface 81 is formed on a side portion near the distal end of the distal end forming portion 80 of the endoscope cover. An observation optical system 82 on the cover side is formed on the flat surface 81, and an illumination optical system 83 is inserted at both ends thereof. They are arranged side by side in a direction perpendicular to the axial direction. An air / water feeding nozzle 84 is provided so as to face the observation optical system 82 and the illumination optical system 83 so that the observation window and the illumination window can be washed.

A channel opening 64 communicating with a treatment tool channel provided inside the cover is provided at the rear of the observation optical system 82 in the axial direction, and the forceps raising base 6 is provided.
6 are provided.

13 and 14 show the internal structure of the distal end forming portion 80 of the endoscope cover. A prism 86 is provided behind the cover glass 85 provided on the outer surface of the observation optical system 82 and the illumination optical system 83, and the illumination light and the light beam of the observation image in the direct-viewing-type cover endoscope 87 are substantially perpendicular to each other. By changing the direction to, it is possible to observe from the side. The light beam direction converting means is not limited to the prism 86, and a reflector such as a mirror can be used. Also, the prism 86 is
The optical performance can be improved by individually providing the observation optical system 82 and the illumination optical system 83, respectively.

Further, the endoscope tip end insertion hole 88 of the endoscope cover has a substantially semicircular cross section as in the second embodiment, and has a substantially semicircular shape of the cover endoscope 87. The tip is inserted so that it fits. The observation optical system 82 and the illumination optical system 83 on the cover side are arranged corresponding to the observation optical system 89 and the illumination optical system 90 of the cover endoscope 87. In addition, an air / water feeding conduit 91 is provided in the distal end forming portion 80 of the endoscope cover, and the air / water feeding nozzle 84 is provided.
Is in communication with.

The forceps raising base 66 is arranged on the central axis of the cross section of the tip forming portion 80, that is, above the endoscope 87 for the cover inserted into the cover and on the axis substantially parallel to the visual field direction. A raising wire 67 inserted through the wire tube 49 is connected.

By disposing the observation optical system and the illumination optical system of the endoscope cover and the insertion hole of the endoscope distal end portion in this way, the observation in the side-viewing direction can be performed using the direct-view type cover endoscope. It becomes possible, and by selecting the endoscope cover with channel, it becomes possible to select either direct view or side view.

Further, by disposing the treatment instrument raising base as in this embodiment, the treatment instrument inserted in the channel can be raised and the distal end portion can be positioned at the center of the visual field of the endoscope. The operability of the treatment tool can be improved.

Next, a method of assembling the treatment instrument insertion opening in the endoscope operation portion fixing mouth at the rear end portion of the endoscope cover will be described with reference to FIGS. 15 and 16.

The rear end portion of the insertion portion cover portion 18 of the endoscope cover 3 is attached to the cover outer skin 32 by the mouth portion 3 for fixing the endoscope operation portion.
3 are airtightly connected to each other. Further, a channel tube 45, a wire tube 49, etc. are inserted into the insertion portion cover portion 18, and a rear end portion of the channel tube 45 is water-tightly fixed to the mouth portion 33 by adhesion or the like.

At the time of assembly, first, as shown in FIG. 15, the channel tube 45 having no side hole is fitted into the insertion hole of the mouth portion 33 and entirely bonded. Then, from the opening 92 corresponding to the treatment instrument insertion port,
A hole is made in the corresponding portion of the channel tube 45 that closes the opening 92 so that the opening 92 opens.
As shown in FIG. 16, the treatment tool insertion port 36 is inserted into the opening 92 and fixed. As a result, forceps or the like can be inserted into the channel tube 45 from the treatment instrument insertion port 36.

In order to assemble by such a procedure, it is not necessary to make a side hole in the channel tube 45 in advance, and it suffices to make a hole for the treatment instrument insertion port after fixing the channel tube 45 to the mouth portion 33. It is possible to omit troublesome work such as alignment of the side hole of the channel tube 45 and the opening 92, and it is possible to improve workability during assembly.

Next, referring to FIGS. 17 to 19,
A configuration example of the air / water supply conduit provided in the distal end configuration portion of the endoscope cover will be described. 17 is a perspective view of the tip forming portion, FIG. 18 is a cross-sectional view of the tip forming portion, and FIG. 19 is a sectional view taken along line BB of FIG.

An air / water feeding nozzle 103 is provided near the side of the observation opening 102 in the distal end forming portion 101 of the endoscope cover, and faces the observation window and the illumination window of the observation opening 102. It is designed to supply air and water.

As shown in FIG. 18, between the endoscope distal end insertion hole 41 and the channel distal end 42, the air supply conduit 104 and the water supply conduit are arranged in parallel with the endoscope distal end insertion hole 41. 1
05 is arranged. Air line 104 and water line 10
5 are arranged substantially parallel to the long axis direction of the semicircular cross section of the endoscope distal end insertion hole 41, and as shown in FIG. 19, the two conduits merge into one on the distal end side. Then, it is bent into an L shape and communicates with the air / water nozzle 103. An air supply tube 106 and a water supply tube 107 are connected to the air supply conduit 104 and the water supply conduit 105, respectively, and are connected to a fluid control device.

In the case of cleaning the observation window and the illumination window, the air supply and water supply buttons provided on the operating portion of the cover endoscope (not shown) are operated, and the cleaning fluid is supplied from the fluid control device to the endoscope cover. To the observation window and the illumination window from the air / water feeding nozzle 103.

As described above, by providing the fluid conduits such as the air conduit and the water conduit in the endoscope cover, the insertion portion of the cover endoscope can be made thin. Further, since the opening of the fluid conduit, that is, the opening of the air / water nozzle is provided laterally to the observation opening, the fluid conduit is a conduit tube, an L-shaped conduit hole, and a nozzle. It can be configured only by itself, and the pipeline configuration can be simplified.

[0075]

As described above, according to the present invention, in the endoscope of the endoscope cover system provided with the treatment instrument raising device for raising the treatment instrument or the like inserted in the channel, the endoscope cover is used. There is an effect that it is possible to improve workability when mounting the.

[Brief description of drawings]

1 to 7 relate to a first embodiment of the present invention,
FIG. 1 is an explanatory diagram showing the entire configuration of an endoscope apparatus of an endoscope cover system.

FIG. 2 is a perspective view showing the overall configuration of an endoscope cover.

FIG. 3 is a perspective view showing a state in which the endoscope cover is attached to the cover endoscope.

FIG. 4 is a perspective view showing a configuration of a distal end portion of an endoscope cover.

FIG. 5 is a cross-sectional view showing the configuration of the tip portion of the endoscope cover.

FIG. 6 is a sectional view showing the configuration of the rear end portion of the endoscope cover.

FIG. 7 is a perspective view showing a configuration of a treatment instrument raising operation mechanism.

8 to 11 relate to a second embodiment of the present invention, and FIG. 8 is a lateral cross-sectional view showing the configuration of the distal end portion of the endoscope cover.

FIG. 9 is an axial cross-sectional view showing the configuration of the distal end portion of the cover endoscope to be inserted into the endoscope cover.

FIG. 10 is a perspective view showing the outer shape of the tip portion of the cover endoscope of FIG.

FIG. 11 is a cross-sectional view showing the configuration of a modified example in which the forceps raising base is changed in the rising direction at the distal end portion of the endoscope cover.

12 to 14 relate to a third embodiment of the present invention, and FIG. 12 is a side view of the distal end portion of the endoscope cover as seen from above.

FIG. 13 is an axial cross-sectional view showing the configuration of the distal end portion of the endoscope cover.

14 is a cross-sectional view taken along the line AA of FIG.

FIG. 15 is a cross-sectional explanatory view for explaining the first step of the method of assembling the treatment tool insertion opening in the endoscope operation portion fixing mouth portion at the rear end portion of the endoscope cover.

FIG. 16 is a cross-sectional explanatory view for explaining a second step of the method for assembling the treatment tool insertion opening in the endoscope operation portion fixing mouth portion at the rear end portion of the endoscope cover.

FIG. 17 is a perspective view of a distal end configuration portion for explaining a configuration example of an air / water supply conduit provided in the distal end configuration portion of the endoscope cover.

FIG. 18 is a transverse cross-sectional view of the distal end constituent portion of the endoscope cover.

19 is a sectional view taken along line BB of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Endoscope cover-type endoscope apparatus 2 ... Cover-type endoscope 3 ... Endoscope cover with a channel 4 ... Cover endoscope 18 ... Insertion part cover part 19 ... Operation part cover part 20 ... Universal cord Cover part 31 ... Cover tip constituent part 32 ... Cover skin 33 ... End part of endoscope for fixing 34 ... Opening part for observation 35 ... Channel opening part 36 ... Treatment tool insertion port 37 ... Treatment tool raising lever 41 ... Endoscope insertion hole 42 ... Channel tip 44 ... Treatment instrument channel 45 ... Channel tube 46 ... Treatment instrument raising base 48 ... Raising wire 49 ... Wire tube 50 ... Wire support member

─────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] June 3, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0020

[Correction method] Change

[Correction content]

An extension tube 17 is connected to the dilator 10, and the endoscope cover 3 is connected via the extension tube 17.
This is for injecting air into the interior for expansion, and by this expansion, the endoscope cover 3 can be easily attached or withdrawn. When the endoscope cover 3 is attached to or detached from the cover endoscope 4, the cover holder 6 is used.
With this, the base end side of the endoscope cover 3 is held and the cover endoscope 4 is inserted or withdrawn.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Name of item to be corrected] 0023

[Correction method] Change

[Correction content]

The suction control valve 23 has a suction tube 2
7 is connected, and an aspirator (not shown) is connected to the end of the endoscope 7, so that unnecessary body fluid or the like can be sucked from the tip of the endoscope. A water supply tube 28 is connected to the water supply control valve 22, and a water supply tank 29 is connected to the tip portion thereof. Further, two air supply tubes 30 extend from the fluid control device 9 and are connected to the air supply control valve 21 and the water supply tank 29.

[Procedure 3]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 1

[Correction method] Change

[Correction content]

[Figure 1]

[Procedure amendment 4]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 11

[Correction method] Change

[Correction content]

FIG. 11

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Akira Suzuki 2-43-2 Hatagaya, Shibuya-ku, Tokyo Inside Olympus Optical Co., Ltd. (72) Hideo Ito 2-43-2 Hatagaya, Shibuya-ku, Tokyo Within Olympus Optical Co., Ltd. (72) Minoru Yamazaki 2-43-2 Hatagaya, Shibuya-ku, Tokyo Inside Olympus Optical Co., Ltd. (72) Osamu Mizuta 2-43-2 Hatagaya, Shibuya-ku, Tokyo No. Olympus Optical Co., Ltd. (72) Inventor Tatsuya Furukawa 2-34-2 Hatagaya, Shibuya-ku, Tokyo Inside Olympus Optical Co., Ltd.

Claims (1)

[Claims] 1. A treatment instrument raising device which has a treatment instrument channel through which a treatment instrument is inserted, and which moves the treatment instrument inserted through the treatment instrument channel and protruding from a distal end portion to a predetermined position. An endoscope cover with a channel for covering an insertion portion of a endoscope, for fixing an operation portion of the endoscope to a base end portion of an insertion portion cover portion for covering the insertion portion of the endoscope A mouthpiece portion is provided, and a treatment instrument raising device operating member that is connected to the treatment instrument raising device and operates the treatment instrument raising device is provided in the mouthpiece portion for fixing the endoscope operation portion. A characteristic endoscope cover with a channel.