JPH0661205U - Endoscope with endoscope cover method - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide an endoscope of an endoscope cover system provided with a filter corresponding to a purpose of use, which can be selectively exchanged according to a purpose of use. [Structure] The tip portion 45 of the cover endoscope 4 is a tip portion 3
It is fitted in the endoscope positioning hole 33b formed in 2. The insertion portion cover portion 3a includes a fixing mouthpiece portion 31 and a distal end forming portion 32 which are flexible and have an elongated insertion portion cover outer cover 3.
It is hermetically connected at 9. A lens hole 36 for arranging the observation window 21 and an air / water supply nozzle 37 are formed on the front end surface side of the front end forming section 32, and the transparent holes formed on the fixing mouth section 31 are formed on the opposite front end surface section. The endoscope positioning hole 33b and the forceps channel through hole 34 corresponding to the holes.
b, an air / water feed through hole 35b, etc. are formed. Then, in the lens hole 36 of the tip forming portion 32, for example, YA
An observation window coated with a thin film filter is provided so that the G laser beam is not transmitted.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention provides an image pickup device for capturing a light beam of a specific wavelength on an endoscope cover with a channel (hereinafter referred to as a cover) which covers an endoscope for an endoscope cover with a channel (hereinafter referred to as an endoscope for a cover). The present invention relates to an endoscope of an endoscope cover type having a filter that does not allow light to enter the endoscope.

[0002]

[Prior art]

 In recent years, endoscopes have been widely used in the medical field and the like. With endoscopes used in the medical field, when inserted into a living body, the observation window provided at the distal end of the insertion section becomes dirty due to the adhesion of body fluid, dirt, mucus, etc. on the affected area, and it becomes impossible to fully observe There is. Therefore, by operating the operation button provided on the near side of the endoscope, you can send the liquid to the observation window for cleaning, and the remaining water after that can be blown away by sending air. Is provided. This air supply function is also used when air is supplied into the body cavity to make it easier to observe the observation site. These air supply and water supply are performed through the air supply line and the water supply line.

In addition, an endoscope is provided with a suction duct for sucking and discharging unnecessary dirt, mucus, and the like, tissue collection with biopsy forceps, medical treatment with a treatment tool, and the like. In some cases, a forceps channel (treatment instrument channel) is provided so that it can be moved.

When an endoscope provided with such conduits such as an air supply conduit and forceps channels is used for a patient, it can be promptly cleaned or sterilized and used for the next patient. Was doing.

However, it takes time to completely clean and disinfect the endoscope, which is not only poor in workability but also a factor of reducing the use efficiency of the endoscope. For this reason, recently, the endoscope itself is covered with a cover, and the endoscope covered with this cover is used for each floor, while the cover covering the endoscope is discarded to clean and disinfect it after use. A so-called cover-type endoscope is adopted in which the endoscope to be simplified is covered with an endoscope cover.

In this cover-type endoscope, only a duct that must be opened in the body cavity of the patient is provided on the endoscope cover side, and an endoscope including an observation means and an illumination means is used. We used a solid-state image sensor (SID) that can be easily projected on the monitor by covering it with an endoscope cover so that it does not come into contact with the patient's body cavity, and is highly evaluated for its image quality and demonstration. Even with a very expensive video endoscope, the video endoscope does not become dirty after use, and the endoscope cover is discarded to simplify cleaning and disinfection.

A so-called cover-type endoscope of this type is disclosed, for example, in Japanese Examined Patent Publication No. 2-54734 (US Pat. No. 4,646,722) or US Pat. No. 3,162,190.

On the other hand, when a treatment is performed on the endoscope using a laser treatment tool, a part of the laser beam is reflected when the treatment site is irradiated with the laser beam, and the reflected laser beam is attached to the distal end portion of the endoscope. It is known that the image pickup device disposed at the tip end is physically or optically damaged by being incident on the objective lens. To prevent damage to the image sensor due to the incidence of this laser beam, in an endoscope that does not use a conventional cover, use a filter to prevent the laser beam from passing through the objective optical system installed in the endoscope. There was one provided. However, at present, as laser beams used for endoscopic treatment, for example, YAG laser, CO2 laser, KTP laser, etc. are known. It is impossible to cut all the laser light rays with a single filter because it only has the effect of cutting the light rays in the region. In the conventional endoscope, since the filter is attached to the objective lens, it is impossible to replace the filter with a filter corresponding to the light beam to be used. Therefore, we prepared an endoscope with a filter corresponding to each wavelength in the objective optical system and used it selectively according to the purpose.

In addition, for example, when an observation light beam emitted from the illumination optical system is likely to be reflected by an observation site and cause halation, an endoscope equipped with a polarization filter is used for observation using infrared rays. When doing so, it was necessary to prepare an endoscope equipped with an infrared observation filter.

Further, since there is no filter provided in the observation window attached to the insertion portion of the cover portion that covers the endoscope for the cover used in the cover-type endoscope apparatus, for example, When performing a treatment using a laser beam, the laser beam reflected by the treatment section was transmitted through the observation window and was incident on the image pickup element via the objective optical system arranged at the tip of the cover endoscope. At this time, if a laser beam filter is not provided in the objective optical system, the image pickup element is physically or optically damaged by the laser beam incident on the image pickup element.

[0011]

[Problems to be solved by the device]

 For example, when performing treatment with a laser beam using the endoscope apparatus as described above, an endoscope having a filter corresponding to the laser beam is required so that the laser beam does not enter the image pickup element. An endoscope with an infrared observation filter is required for infrared observation, and an endoscope with a polarization filter is required for polarization observation. It was necessary to prepare separate endoscopes.

However, since it is necessary to prepare a plurality of endoscopes corresponding to the purpose of use, it is economically burdensome for the user to prepare a plurality of endoscopes corresponding to the purpose of use. It was very big.

The same applies to the case of using the cover-type endoscope apparatus, and it is necessary to prepare a cover endoscope including a filter corresponding to the purpose of use.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an endoscope of an endoscope cover system that includes a filter that can be selectively replaced according to the purpose of use and that corresponds to the purpose of use. .

[0015]

[Means for Solving the Problems]

 An endoscope with an endoscope cover method according to the present invention includes an endoscope cover with a channel and an endoscope for an endoscope cover with a channel that is used by being fitted to the endoscope cover with the channel. In the endoscope of the endoscope cover system, a filter is provided in the observation window of the distal end constituent part of the endoscope cover with a channel.

[0016]

[Action]

 With this configuration, for example, when performing treatment using a laser beam, by selecting and using a filter that cuts the laser beam in the observation window provided in the tip configuration part of the cover The laser beam does not enter the observation optical system of the mirror.

[0017]

【Example】

 An embodiment of the present invention will be described with reference to the drawings. 1 to 4 relate to an embodiment of the present invention, FIG. 1 is an overall view of a cover type endoscope apparatus, and FIG. 2 is an explanatory view showing a schematic configuration of an endoscope for an endoscope cover with a channel. 3 is a sectional view showing a schematic configuration of an insertion portion cover portion of the endoscope cover with a channel, and FIG. 4 is a sectional view of a distal end constituent portion of the insertion portion cover portion.

As shown in FIG. 1, a cover-type endoscope apparatus 1 is an apparatus having an endoscope (hereinafter referred to as a cover-type endoscope) 2 of an endoscope cover method with a channel. The endoscope 2 includes a cover 3 and a cover endoscope 4.

As shown in FIG. 2A, the cover endoscope 4 is, for example, an electronic endoscope, and is slenderly inserted in the body cavity in front of the operation portion 41 which also serves as a grip portion on the proximal side. The insertion part 42 to be extended is extended. The insertion portion 42 is mainly composed of a flexible flexible tube 43, and a bending portion 44 that can be bent vertically / horizontally is continuously provided at the tip of the flexible tube 43, and a rigid portion is provided in front of the bending portion 44. A tip portion 45 is provided. Further, a universal cord 46 in which a signal cable, a light guide fiber bundle and the like (not shown) are installed is extended from the side of the operation portion 41. The universal cord 46 is connected to a light source device and a video processor, which will be described later, through a connector 47 provided at the tip of the universal cord 46.

The operation portion 41 is detachably provided with angle knobs 48a and 48b for bending the bending portion 44, and also has an air / water feeding control switch 49a, a suction control switch 49b, and various types for photography. Function switches 49c, 49c, 49c are provided. The cross-sectional shape of the insertion portion 42 of the cover endoscope 4 is, for example, a substantially D shape such as a semicircle, and the cover 3 will be described later by forming the cross-sectional shape of the insertion portion 42 in this manner. The space of the pipeline is secured and the diameter is reduced.

As shown in FIG. 1, the cover 3 that covers the cover endoscope 4 of the cover-type endoscope 2 includes an insert portion cover portion 3 a that covers the insert portion 42 of the cover endoscope 4 and the cover portion 3 a. The operation section cover section 3b covers the operation section 41 of the cover endoscope 4, the universal code cover section 3c covers the universal code 46 of the cover endoscope 4, and the like. The cover portions 3a, 3b, 3c are attached to the cover endoscope 4 in a watertight state and used for inspection.

The endoscope device 1 includes a cart 5 that stores various peripheral devices connected to the cover-type endoscope 2 and a cover holder 6 that holds the cover-type endoscope 2. It is equipped. As shown in the figure, the cart 5 accommodates various peripheral devices such as a light source device 7, a video processor 8, a fluid control device 9, and an endoscope cover dilator (hereinafter referred to as dilator) 10 with a channel. A monitor 11 for displaying an endoscopic image is placed on the top plate of the cart 5.

The light source device 7 is connected to the cover endoscope 4 of the cover-type endoscope 2 via a connector 47 to supply illumination light to the endoscope distal end portion. The bite processor 8 is connected to the connector 47 of the electronic cover endoscope 4 via the connecting cable 47a to convert an electric signal from the endoscope into a standard video signal. The monitor 11 displays an endoscopic image. Further, the fluid control device 9 is for performing air supply / water supply, etc. through a pipe line described later provided in the cover, and is provided with a water supply source, an air supply source not shown, and the like. Air and water are supplied by controlling the opening and closing of the pipeline connected to the water supply source with, for example, a solenoid valve.

Further, the dilator 10 is adapted to expand the cover 3 by sending air into the cover 3 so that the cover endoscope 4 can be easily attached or detached.

It should be noted that the cover holder 6 holds, when the insertion portion cover portion 3a is attached to the cover endoscope 4, an arm 6a thereof to hold a mouth body portion of the insertion portion cover portion 3a, which will be described later, and the like. Is able to. Therefore, the endoscope can be held without directly touching the cover 3, which is sanitary and facilitates operability.

As shown in FIG. 3, the distal end portion 45 of the cover endoscope 4 including the observation optical system 100 is fitted into the endoscope positioning hole 33b formed in the distal end forming portion 32 of the insertion portion cover portion 3a. is doing. As shown in the figure, the insertion portion cover portion 3a includes an endoscope operation portion fixing mouth portion (hereinafter referred to as a fixing mouth portion) 31 and a distal end portion which are arranged on the proximal side of the insertion portion cover portion 3a. It is formed by airtightly connecting the provided tip forming portion 32 with an elongated cover outer cover 39 made of a flexible material.

A treatment that also serves as a through-hole 33a for insertion of the cover endoscope and a suction conduit formed in a diameter such that the insertion portion 42 of the cover endoscope 4 comes into close contact with the fixing mouth 31 in the axial direction. A through hole 34a for a tool channel and a through hole 35a for air / water supply are formed, and a treatment tool insertion port 24 and an extension tube mouth 25 are provided on the side portion so as to project. Further, a lens hole 36 for arranging the observation window 21 and an air / water supply nozzle 37 are formed in the tip end surface portion of the tip end forming portion 32, and a fixing mouth portion 31 is formed in the opposite tip end surface portion. An endoscope positioning hole 33b, a treatment instrument channel through hole 34b, and an air / water feeding through hole 35 formed to have a diameter with which the distal end portion 45 of the cover endoscope 4 corresponding to each of the above-mentioned through holes is formed. b, etc. are formed. As shown in FIG. 4, the observation window 21 for the observation optical system 100 and the illumination optical system 101 of the endoscope 4 for the cover formed in the distal end constituting portion 32, and the air / water transmission through holes 37a, 37b. The treatment instrument channel through hole 34b is arranged so as to be substantially symmetrical with respect to the center line a 1.

Further, flexible tubes 120 and 121 are inserted through the treatment tool channel through holes 34a and the air / water feeding through holes 35a formed in the fixing mouth portion 31. Then, one end of each of the tubes 120 and 121 is directly connected to and connected to the through-hole 34b for the treatment tool channel and the through-hole 35b for air supply / water supply formed in the tip forming portion 32, and the other end is connected to the fluid control device. By directly communicating with and connecting to 9, the suction pipe line (procedure pipe line) 22 and the air / water supply pipe line 23 are formed without forming a connecting portion.

Further, the distal end forming portion 32 is provided with, for example, a protruding cuff portion 130 for ensuring a distance between the observation optical system 100 of the cover endoscope 4 and an observation object.

In addition, the illumination optical system 101 and the observation optical system 100 of the cover endoscope 4 are set with respect to the observation window 21 provided in the lens hole 36 of the distal end forming portion 32 of the insertion portion cover portion 3a. It is designed to be placed in position. The front surface of the observation window 21 is coated with a thin-film filter 150 so that the observation optical system 100 of the cover endoscope 4 does not transmit a YAG laser beam. The thin film filter 150 coated on the front surface of the observation window 21 is not limited to a filter that does not necessarily transmit the YAG laser beam, but may be a thin film filter that does not transmit various laser beams such as CO2 laser beam and KTP laser beam. It is an optical filter that can cut or pass a specific wavelength depending on the purpose of use, such as an infrared observation filter, a polarization observation filter, and a fluorescence observation filter.

As described above, the observation window 21 in which the thin film filter 150 is coated according to the purpose such as treatment or observation is provided in the lens hole 36 formed in the distal end forming portion 32 of the insertion portion cover 3a. By forming the cover 3, the operator can appropriately use the cover 3 having the observation window 21 provided with the thin film filter 150 according to the application.

From this, even if a laser treatment tool or the like inserted through the treatment instrument channel 22 of the insertion portion cover portion 3a is used while observing with the cover endoscope 4, the thin film coated on the observation window 21 is used. Since the laser beam does not enter the observation optical system 100 by the filter, the image pickup device provided in the cover endoscope 4 is not damaged. As described above, by using the cover 3 provided with the observation window provided with the thin-film filter 150 corresponding to the purpose of inspection or treatment, the cover endoscope 4 is arranged in the observation optical system 100. Since the inspection and treatment can be performed efficiently without damaging the existing image pickup device, it is not necessary to prepare multiple expensive endoscopes configured according to each use purpose, which not only saves cost. Not only that, but the inspection and treatment can be performed hygienically.

Further, the tubes 120 and 121 which are directly connected to / connected to the fluid control device 9 are connected / connected to the air / water supply through holes 35 b and the treatment instrument channel through holes 34 b formed in the distal end forming portion 32. Since the air supply / water supply pipeline 23 and the suction pipeline 22 are formed as a result, the turbulence of air or water generated at the joint between the pipelines when the fluid flows inside the pipelines. This eliminates the decrease in air / water supply capacity during inspection / treatment. In addition, the problem of water drainage at the joint between the pipes is solved, and the reduction of the joint reduces the labor and cost for manufacturing the cover.

Further, since the tip forming portion 32 provided with the cuff portion 130 is prepared, the observation window 21 attached to the tip forming portion 32 is directly used in the body cavity by selectively using it as needed. The contact with the inside can be prevented, and the distance between the endoscope tip end portion 45 and the observation subject can be reliably ensured to improve the observation performance.

Further, by disposing the channels and the optical system provided in the insertion portion cover portion 3a so as to have a symmetrical positional relationship with respect to the center line a of the distal end forming portion 32, the glare is eliminated. Therefore, the procedural property is improved as the observation performance is improved.

As shown in FIG. 5, the distal end forming portion 32 shown in FIG. 4 has the observation window 21 at the center of the observation optical system 100 in the insertion portion cover portion 3a without the forceps channel through hole 34b. It is located approximately on the center line, and the air supply channel 37b, the water supply channel 37a, and the illumination optical system 101 are arranged with the center line a as the axis of symmetry. Further, as shown in FIG. 6, it has only the optical systems 100 and 101 and does not need any channels. In the insertion portion cover portion 3a, the center of the observation optical system 100 is located on the approximate center line of the observation window 21. The illumination optical system 101 is arranged with the center line a as the axis of symmetry.

On the other hand, as shown in FIG. 7 for the shape of the cuff portion 130 of the tip forming portion 32 shown in FIG. 3, the outer diameter of the central portion of the tip forming portion is larger than the outer diameter of the end portion of the tip forming portion. By forming it into a streamlined shape, it becomes possible to smoothly insert the insertion portion cover portion 3a into the narrowed portion. Since other configurations are the same as those in FIG. 3, the part number and the description are omitted. .

Although a streamlined cross-sectional shape is shown as an example in the present drawing, the cross-sectional shape of the tip forming portion 32 is not limited to the streamlined cross-sectional shape, but various shapes may be used depending on the insertion site. The cover 3 can be further selectively used by preparing various kinds of insert portion cover portions 3a. Other configurations, operations and effects are the same as those in the above-mentioned embodiment.

By the way, since the effective length of the insertion portion 42 of the cover endoscope 4 constituting the cover endoscope 2 is not formed to have a uniform length, the cover endoscope 4 is covered by the cover 3. It was necessary to prepare the same so that the effective length of the insertion portion cover portion 3a and the effective length of the insertion portion 42 of the cover endoscope 4 were made to coincide with each other.

Therefore, as shown in FIG. 8, an insertion portion cover portion 201 provided with an effective length adjusting means 200 that can be used without being affected by the effective length of the insertion portion 42 of the cover endoscope 4. Form.

As shown in FIG. 3A, the insertion portion cover portion 201 provided with the effective length adjusting means 200 has a cover inner portion for the distal end forming portion 32 and the fixing mouth portion 31 of the insertion portion cover portion 201. It is formed by connecting a cover outer cover 202 formed of a thin resin having flexibility to isolate the insertion portion 42 of the endoscope 4 from the external environment. A slack holding portion 203 as an effective length adjusting means 200 in a folded state is provided on the insertion portion cover outer skin 41 connected to the fixing mouth portion 31. The slack holding section 203 fixes the slack holding section 203 to the fixing mouth section 31 by an elastic body 204 formed of a resin having elasticity in a ring shape. The elastic body 204 for fixing the slack holding portion 203 to the fixing mouth portion 31 may be a thread or a wire.

When inserting the insertion section 42 of the cover endoscope 4 into the insertion section cover section 201 configured as described above, first, as shown in FIG. 8A, the slack holding section 203 is inserted. In the formed state, the tip portion 45 of the cover endoscope is fitted into the endoscope fixing hole 33b. At this time, since the length of the cover outer cover 202 is shorter than the effective length of the cover endoscope 4, the end of the operation portion 41 does not contact the end of the fixing mouth portion 31. Therefore, the cover skin 202 folded in the slack holding portion 203 is gradually extended so that the operation portion end and the fixing mouth end are brought into contact with each other as shown in FIG.

Further, as shown in FIG. 9A, before inserting the cover endoscope 4, the insertion portion cover outer cover 41 of the slack holding portion 203 must be fully extended. The tip portion 42 of the cover endoscope 4 is fitted into the endoscope positioning hole 33b. Then, the cover outer cover 202 is folded into the fixing mouth portion 31, and the slack holding portion 203 as shown in FIG. 7B is provided, and the operation portion end portion and the fixing mouth portion end portion are brought into contact with each other. It is possible to adjust the total length of the insertion portion cover portion 201. Other configurations, operations, and effects are the same as those in the above embodiment.

Since the total length of the insertion portion cover portion 201 can be adjusted as described above, the pipe disposed inside the insertion cover portion 201 with respect to the effective length of the insertion portion cover portion 201. In order to adjust the length of the passage, as shown in (a) and (b) of FIG. 10, it is fed into the through hole formed in the fixing mouth portion 31 provided at the end of the insertion portion cover portion 201. A tube serving as the air / water supply conduit 23 or the suction conduit 22 is inserted so that the fixing mouth portion 31 is movable with respect to the conduits 22 and 23. Further, a bellows structure portion 208 is provided for the forceps channel.

As described above, since the length of the insertion portion cover portion 201 can be adjusted, one kind of insertion portion cover portion can be prepared for a plurality of cover endoscopes having different insertion portion effective lengths. Good.

[0046]

[Effect of device]

 As described above, according to the present invention, it is possible to provide the endoscope of the endoscope cover system, which is provided with the filter corresponding to the purpose of use, which can be selectively replaced according to the purpose of use.

[Submission date] August 26, 1993

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0001

[Correction method] Change

[Correction content]

[0001]

[Industrial applications]

This invention is not incident light of a specific wavelength to the imaging element in an endoscope cover will endoscope for endoscope cover (hereinafter referred to as cover endoscope) covered (hereinafter referred to as cover) The present invention relates to an endoscope of an endoscope cover type having a filter.

[Procedure 3]

[Document name to be amended] Statement

[Name of item to be corrected] 0015

[Correction method] Change

[Correction content]

[0015]

[Means for Solving the Problems]

The endoscope of the endoscope cover system according to the present invention, the endoscope cover comprising a endoscope cover and the endoscope cover vision mirror to use fitted in the endoscope cover this in endoscopic manner, the filter provided in the observation window of the distal end construction part of the front Symbol endoscope cover.

[Procedure amendment 4]

[Document name to be amended] Statement

[Name of item to be corrected] 0022

[Correction method] Change

[Correction content]

The endoscope device 1 includes a cart 5 that stores various peripheral devices connected to the cover-type endoscope 2 and a cover holder 6 that holds the cover-type endoscope 2. It is equipped. As various peripheral devices to the cart 5, as shown in FIG., For example, optical source device 7, VIDEO processor 8, (hereinafter referred to dilator) fluid control device 9, channeled endoscope cover dilator 10 Etc. are stored, and a monitor 11 for displaying an endoscopic image is placed on the top plate of the cart 5.

[Procedure Amendment 5]

[Document name to be amended] Statement

[Name of item to be corrected] 0023

[Correction method] Change

[Correction content]

The light source device 7 is connected to the cover endoscope 4 of the cover-type endoscope 2 via a connector 47 to supply illumination light to the endoscope distal end portion. Further, VIDEO processor 8, an electric signal standard specific video signal from the endoscope by being connected to the connector 47 of the electronic cover endoscope 4 via the connection cable 47a It is converted into an image and an endoscopic image is displayed on the monitor 11. Further, the fluid control device 9 is for performing air supply / water supply, etc. through a pipe line described later provided in the cover, and is provided with a water supply source, an air supply source not shown, and the like. Air and water are supplied by controlling the opening and closing of the pipes connected to the water supply source with, for example, solenoid valves.

[Brief description of drawings]

1 to 4 relate to an embodiment of the present invention, and FIG. 1 is an overall view of an endoscope apparatus of an endoscope cover system with a channel.

FIG. 2 is an explanatory diagram showing a schematic configuration of an endoscope of an endoscope cover system with a channel.

FIG. 3 is a cross-sectional view showing a schematic configuration of an insertion portion cover portion of an endoscope cover with a channel.

FIG. 4 is a cross-sectional view showing a schematic configuration of a tip portion of a cover-type endoscope.

FIG. 5 is a cross-sectional view showing a first modification of the distal end portion of the cover-type endoscope shown in FIG.

FIG. 6 is a cross-sectional view showing a second modification of the distal end portion of the cover-type endoscope shown in FIG.

FIG. 7 is a cross-sectional view showing a first modified example of the cuff portion of the tip forming portion of FIG.

FIG. 8A is a cross-sectional view showing the relationship between the insertion portion cover portion and the cover endoscope before adjustment of the insertion portion effective length. FIG. 8B is a cover endoscope in which the insertion portion cover portion is adjusted in effective length. Sectional view showing the state where the

FIG. 9A is a cross-sectional view showing the relationship between the insertion portion cover portion and the cover endoscope before adjustment of the insertion portion effective length. FIG. 9B is a cover endoscope in which the effective length of the insertion portion cover portion is adjusted. Sectional view showing the state where the

FIG. 10 (a) is a cross-sectional view of the insertion portion cover portion showing a state where the treatment channel of the bellows structure is extended.

[Explanation of symbols]

3 ... Endoscope cover with channel (3a ... Insertion section cover part) 4 ... Endoscope for endoscope cover with channel (Endoscope for cover) 21 ... Observation window 32 ... Tip part 150 ... Filter

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

[Procedure amendment]

[Submission date] August 26, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be amended] Scope of utility model registration request

[Correction method] Change

[Correction content]

[Scope of utility model registration request]

And 1. A endoscope cover, in the endoscope of the endoscope cover system and a endoscope cover for endoscope to use fitted in the endoscope cover of this, before Symbol in Endoscope cover type endoscope characterized in that a filter is provided in the observation window at the distal end of the endoscope cover ─────────────────────── ────────────────────────────────

[Procedure amendment]

[Submission date] September 13, 1993

[Procedure Amendment 1]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 3

[Correction method] Change

[Correction content]

[Figure 3]

Front page continued (72) Inventor Yoshio Tashiro 2-43-2 Hatagaya, Shibuya-ku, Tokyo Olympus Optical Co., Ltd. (72) Inventor Yoshihiro Iida 2-43-2 Hatagaya, Shibuya-ku, Tokyo Olympus Optical Kogyo Co., Ltd. (72) Inventor Akira Suzuki 2-43-2 Hatagaya, Shibuya-ku, Tokyo Olympus Optical Co., Ltd. (72) Osamu Mizuta 2-43-2 Hatagaya, Shibuya-ku, Tokyo Olympus Inside Optical Industry Co., Ltd. (72) Creator Tsutomu Ishiguro 2-34-2 Hatagaya, Shibuya-ku, Tokyo Inside Olympus Optical Industry Co., Ltd.

Claims (1)

[Scope of utility model registration request] 1. An endoscope of an endoscope cover system, comprising: an endoscope cover with a channel; and an endoscope for an endoscope cover with a channel which is used by being fitted to the endoscope cover with a channel. An endoscope of the endoscope cover system, wherein a filter is provided in an observation window of a distal end forming portion of the endoscope cover with a channel.