JPH06237882A - Endoscope cover with channel - Google Patents

Abstract

PURPOSE:To obtain a good operability by an endoscope cover with a channel without degrading inserting property of the inserting part of an endoscope itself into a tested body. CONSTITUTION:An endoscope 2 for a cover is not degraded in its inserting property because an inserting part sheath 28 of a cover 1 to cover a soft part 18 and a bending part 19 is made of an identical material and has a uniform thickness along the whole length. An endoscope for a cover with different length from the endoscope 2 for a cover can apply the cover 1 and is not degraded in its inserting property, and good operability of the endoscope can be obtained.

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 for preventing contamination 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. In endoscopy in the medical field, it is necessary to use a clean endoscope that has been thoroughly washed and disinfected beforehand, and the time and cost required for cleaning and disinfecting this endoscope are effective It is one of the factors that hinder its use.

For this reason, recently, by covering the endoscope itself with an endoscope cover, it is not necessary to wash or sterilize the endoscope so as not to make it dirty even after use. Endoscope technology based on an endoscope cover method has been proposed. Examples of this endoscope cover method include Japanese Patent Publication No. 2-54734 and USP 3,16.
Some are described in Japanese Patent No. 2,190.

In the endoscope cover system, the endoscope is covered with a clean endoscope cover that has been sterilized in advance, and the endoscope cover is removed and discarded after the inspection is completed. The cover will be disposable for each patient.
Therefore, it is very hygienic, and it is possible to save the trouble of cleaning and disinfecting the endoscope itself.

[0005]

By the way, the cover endoscope mounted on the endoscope cover has a structure similar to that of a conventional endoscope used without a cover, and has no cover. It is also possible to use the conventional endoscope used in.

That is, the cover endoscope includes an elongated insertion portion and a large-diameter operating portion connected to the rear end of the insertion portion, and the insertion portion includes a rigid tip portion and a hard tip portion. The bending portion is continuously provided at the rear end of the tip portion and can be bent up and down, left and right, for example, and the flexible portion made of an elongated flexible tube is continuously provided between the bending portion and the operation portion. Therefore, the soft portion is considered to be more insertable into the body cavity at the time of endoscopic examination by forming, for example, the distal end side to have higher flexibility than the proximal side.

However, in the conventional endoscope cover,
Since it is combined with various cover endoscopes with different curved lengths, flexibility of the portion covering the insertion portion of the cover endoscope is not considered so much, especially for cleaning and disinfecting. In the endoscope cover with a channel equipped with a treatment instrument channel and a channel such as an air supply / water supply pipe from Kusasa,
The flexibility of the insertion portion into the body cavity becomes uneven.

Therefore, in a state in which the cover endoscope is covered with the channel-equipped endoscope cover, the insertability into the body cavity of the insertion portion of the cover endoscope, which has been considered in advance, is impaired, and the endoscope is Not only the operability is deteriorated, but also the patient may suffer pain during insertion.

The present invention has been made in view of the above circumstances, and has a channel with which good operability of the endoscope can be obtained without impairing the insertability of the insertion portion of the endoscope itself into the subject. It is intended to provide an endoscope cover.

[0010]

A channel-equipped endoscope cover of the present invention is a channel-equipped endoscope cover which covers an endoscope, and which corresponds to a curved portion and a flexible portion of the endoscope. However, it has uniform flexibility without impairing the flexibility of the soft portion.

[0011]

In the endoscope cover with a channel of the present invention, the portions corresponding to the bending portion and the soft portion of the endoscope have uniform flexibility without impairing the flexibility of the soft portion. .

[0012]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 5 relate to an embodiment of the present invention, FIG. 1 is a sectional view showing a schematic configuration of an endoscope cover with a channel, and FIG. 2 is a configuration of an endoscope apparatus of an endoscope cover system with a channel. 4 is an overall view showing FIG. 3, FIG.
Is a perspective view of the tip of the cover, and FIG. 5 is a front view of the tip of the cover.

In FIG. 2, reference numeral 10 is an endoscope apparatus. In this endoscope apparatus 10, a cover endoscope 2 is covered with an endoscope cover (hereinafter abbreviated as a cover) 1 with a channel. It is used as an endoscope with an endoscope cover system with a channel (hereinafter, abbreviated as a cover endoscope) 3 and does not require cleaning and disinfection of the endoscope after the inspection.

The cover-type endoscope 3 includes, for example, a light source device 4, a video processor 5, a fluid control device 6, and an endoscope cover extender with a channel (hereinafter abbreviated as an extender).
7, various peripheral devices such as a monitor 8 are connected, the monitor 8 is placed on the top plate of the cart 9, and other peripheral devices are housed in the cart 9.

The light source device 4 includes the cover endoscope 2
The video processor 5 converts the electric signal from the cover endoscope 2, which is an electronic endoscope, into a standard video signal and outputs the standard video signal to the monitor 8. Is. The monitor 8 receives the video signal and displays an endoscopic image.

The fluid control device 6 is for supplying air, water, etc. through a pipe line, which will be described later, provided in the cover 1. Therefore, the fluid control device 6 has a water supply source. 11, an air supply source and the like (not shown) are provided. The pipes connected to the water supply source 11 and the air supply source (not shown) are controlled to be opened and closed by electromagnetic valves. Further, the dilator 7 sends air into the cover 1,
The cover 1 is expanded so that the cover endoscope 2 can be easily attached to or removed from the cover 1.

The cover endoscope 2 has a structure similar to that of a conventional endoscope used without a cover, and has a large-diameter operation portion 12 provided with an air / water supply switch, a suction switch, and the like. The universal cord 13 includes a universal cord 13 extending from a side portion of the operating portion 12 and an elongated insertion portion 14 (see FIG. 1) extending from a proximal end side of the operating portion 12. Is detachably connected to the light source device 4 via a connector 15 provided at the end of the.
Further, the connector 15 is detachably connected to the video processor 5 via a signal connector 17 at the end of a cable 16 extending from a side portion of the connector 15.

As shown in FIG. 1, the cover endoscope 2 is provided.
The insertion portion 14 has a flexible portion 18 made of a flexible tube, a bendable bending portion 19, and a semicircular cross-sectional shape in order from the proximal end side to the distal end side of the operation portion 12, The cover 1 includes a hard tip portion 20 attached to a cover tip portion 29, which will be described later, and the flexible portion 18 is formed so that the tip end side has higher flexibility than the hand side, for example. As described above, it is considered to enhance the insertability into the body cavity at the time of endoscopic examination, as in the conventional coverless endoscope.

In addition, the bending operation knob 2 is provided on the operation section 12.
1 is provided, and by operating the bending operation knob 21, the bending piece 19a of the bending portion 19 shown in FIG. 3 is driven, and the bending portion 19 is bent vertically and horizontally, for example. . Further, the operation unit 12 is supplied with air.
Water supply switch, suction switch, image changeover switch, etc. are provided, and by operating each switch,
It is possible to perform air supply / water supply, suction, image freeze, etc.

Further, as shown in FIG. 3, the insertion portion 1
4 has an objective optical system 22 and an illumination optical system 37.
(See FIG. 4), and a solid-state image pickup device such as a charge-coupled device for converting an incident optical image into an electric signal at the rear end of the objective optical system 22, and an image pickup unit having other peripheral circuit devices mounted therein. 23 are provided. The electric signal output from the solid-state imaging device is input to the video processor 5 via the cable 16 extending from the side of the connector 15 at the end of the universal cord 13.

On the other hand, as shown in FIG. 1, the cover 1 has an operation section cover section 24 and a universal code cover section which respectively cover the operation section 12, the universal cord 13 and the insertion section 14 of the cover endoscope 2. 25, and an insertion section cover section 26, and the insertion section cover section 26 further includes an operation section fixing mouth section (hereinafter, mouth section) for fixing the operation section 12 of the cover endoscope 2. 2)
7, a cover tip portion 29, a flexible insertion portion cover that is airtightly coupled between the mouth portion 27 and the cover tip portion 29 and isolates the insertion portion 14 of the cover endoscope 2 from the external environment. It is composed of an outer skin 28. Then, the operation portion cover portion 24 and the universal cord cover portion 2
5. The insertion portion cover portion 26 is bound by the band member 30 and the excess space is gathered, so that the cover endoscope 2 is liquid-tightly covered.

The operation section cover section 24 and the universal cord cover section 25 are formed of synthetic resin such as polyurethane, polyester, and silicon, and the insertion section cover section 26 is provided with the mouth section 27 and the cover tip section. 29 is formed of a material such as a hard synthetic resin.

The outer cover 28 of the insertion portion cover is made of, for example, a synthetic resin, is made of the same material and has a uniform thickness over the entire length, and the flexible portion 1 of the cover endoscope 2 is made.
It is considered that the flexibility of 8 is not impaired.

In addition, three flexible tubes, an air supply tube 31, a water supply tube 32, and a suction tube 33, are arranged in the insertion section cover section 26. The tip of the water supply tube 32 communicates with an air / water supply nozzle 34 provided in the cover tip 29, and the tip of the suction tube 33 communicates with a forceps outlet 35 that also serves as a suction port.

The tip opening of the air / water nozzle 34 is
It faces the outer surface of a transparent semi-circular cover glass 36 as an observation window. As shown in FIGS. 4 and 5, this cover glass 36 is the tip 2 of the cover endoscope 2.
It is fitted into a locking portion 38 provided at a position corresponding to the illumination optical system 37 and the objective optical system 22 arranged at 0, and the periphery is liquid-tightly adhered and fixed.

In this case, as shown in FIG. 16, in the channel-equipped endoscope cover 130 having the same structure as the cover 1 but without the locking portion 38, the tip of the air / water nozzle 132 of the cover tip 131. On the outer surface facing the opening,
Since the cover glass 133 as an observation window is bonded, not only the positioning of the cover endoscope 140 with respect to the tip portion 141 is required, but also the size of the bonding surface 134 becomes insufficient. For this reason, not only is the reliability of the liquid-tight structure insufficient, but also the gabber glass 133
Do not damage the inside of the body cavity during endoscopy with the protruding part of
Extreme caution is required.

On the other hand, in the endoscope cover 1 with a channel of this embodiment, the cover tip portion 29 is provided with the locking portion 38, and the locking portion 38 has the cover glass 36 as an observation window.
The positioning of the cover endoscope 2 mounted on the cover 1 with respect to the distal end portion 20 is simplified, and the adhesion of the cover glass 36 is made strong to provide a reliable liquid-tight structure. Moreover, since there is no protruding portion of the cover glass 36, a safe endoscopic inspection can be realized.

The proximal ends of the air supply tube 31, the water supply tube 32, and the suction tube 33 extend from the mouth portion 27, and together with the universal cord 13 of the cover endoscope 2, the universal cord 13. The cord cover portion 25 extends to the fluid control device 6 side in a state of being covered with the cord cover portion 25, and the base end thereof is connected to the fluid control device 6. Therefore, by supplying air and water through the air supply tube 31 and the water supply tube 32, the cover glass 36
It is possible to remove body fluid and the like attached to the.

Further, a forceps insertion opening 39 into which forceps can be inserted and an expansion tube opening 41 to which an expansion tube 40 provided in the expansion device 7 is connected are provided on the side surface of the opening 27. The forceps insertion port 39 communicates with the suction tube 33, and the expansion tube mouth body 41.
Is provided at a position separated by 90 ° or more in the radial direction from the forceps insertion opening 39, and is separated so that when one is used, the other is not in the way.

Further, as shown in FIG.
An endoscope insertion channel 42 for inserting / removing (attaching / detaching) the insertion portion 14 of the cover endoscope 2 is opened on the side near the side, and communicates with the extension tube mouth 41. still,
The endoscope insertion channel 42 refers to the cover tip portion 29.
And the air supply tube 31, the water supply tube 32, and the suction tube 33 are removed from the internal space surrounded by the insertion section cover outer skin 28 and the mouth section 27,
It is a portion into which the cover endoscope 2 is inserted.

The cover 1 having such a configuration is all sterilized in a packed state, the clean cover endoscope 2 is covered with the clean cover 1, and the cover 1 is discarded after the inspection is completed. On the other hand, the cover endoscope 2 is repeatedly used by being covered with a new clean cover 1.

When performing an endoscopic examination using the cover-type endoscope 3, the insertion-portion cover skin 28 of the cover 1 that covers the flexible portion 18 and the bending portion 19 of the cover endoscope 2 extends over the entire length. Since the same material has a uniform thickness and has uniform flexibility that does not impair the flexibility of the flexible portion 18 of the cover endoscope 2, the insertability into the body cavity is impaired. Never. Further, instead of the cover endoscope 2, the cover 1 can be applied to cover endoscopes having different curved portions, and similarly, the insertability into a body cavity may be impaired. Absent.

That is, since the conventional cover is combined with various cover endoscopes having different curved portions, the flexibility of the portion covering the insertion portion of the cover endoscope is not considered so much. In particular, in the case of an endoscope cover with a channel including a treatment tool channel and channels such as an air supply / water supply pipe due to difficulty in cleaning / disinfecting, the flexibility of the insertion portion into the body cavity becomes uneven. Although there is a possibility that the insertability into the body cavity at the time of endoscopy may deteriorate, by using the cover 1 of the present invention, good endoscope operability can be achieved without deteriorating the insertability into the body cavity. Can be obtained.

Further, with respect to the air supply tube 31, the water supply tube 32, and the suction tube 33 provided in the cover 1, one to three tubes are made of the same material over the entire length and have a uniform thickness and are flexible. When the cover 1 is attached, the flexibility of the flexible portion 18 of the cover endoscope 2 can be more effectively utilized by making the properties uniform, and further excellent endoscope operability can be obtained.

Further, in the cover 1, since the flexibility of the portion covering the flexible portion 18 and the bending portion 19 of the cover endoscope 2 is uniform, the length of the bending portion is different. Even when the bending operation is performed by applying the bending operation, the original bending performance of the cover endoscope is not impaired.

By the way, in the endoscope for a cover, the endoscope for a cover whose curved portion can be curved in four directions (hereinafter abbreviated as a four-direction scope) and the one for a cover whose curved portion can be curved in two directions. Endoscope (hereinafter abbreviated as 2-way scope)
The diameter of the insertion portion of the 4-direction scope is larger than that of the 2-direction scope.

Therefore, conventionally, when the same type of cover is applied to the two-direction scope and the four-direction scope, the endoscope insertion channel formed in the mouth portion of the cover must be increased, and the two-direction scope is used. When mounted, it will be fixed to the mouth with an endoscope insertion channel of fairly large inner diameter. Therefore, it becomes difficult to attach the cover to the cover endoscope, and a pinhole or the like may be formed in the cover by an unreasonable operation.

To deal with this, a cover for the two-way scope and a cover for the four-way scope are separately provided, and each of them is an endoscope insertion channel suitable for fixing the operation portion of each scope. The above problems can be solved.

That is, in the cover 50 for a two-way scope, the main part of which is shown in FIG. 6, the endoscope insertion channel 52 of the mouth 51 has an inner diameter suitable for fixing the operation portion of the two-way scope. , Insertion portion cover outer skin 53, forceps insertion port 5
Other configurations such as 4, the expansion tube mouth 55, the suction tube 56, the air supply tube 57, and the water supply tube 58 are substantially the same as those of the cover 1 described above.

Further, in the cover 60 for a four-way scope, the main part of which is shown in FIG. 7, the endoscope insertion channel 62 of the mouth portion 61 has an inner diameter suitable for fixing the operation portion of the four-way scope, The inner diameter of the endoscope insertion channel 52 is larger than that of the insertion portion cover outer cover 63 and the forceps insertion opening 6.
Other configurations such as 4, the expansion tube mouth 65, the suction tube 66, the air supply tube 67, and the water supply tube 68 are substantially the same as those of the cover 1 described above.

As a result, the work of mounting each of the two-direction scope and the four-direction scope can be simplified, and the outside of each mouth 51, 61 corresponding to the inside diameter of each endoscope insertion channel 52, 62. The diameters will also be different, and it will be possible to prevent erroneous mounting of each scope.

Further, the cover 50 of the two-way scope.
And the cover 60 for the four-direction scope, each mouth portion 5
By color-coding the exterior colors of 1, 61, for example, pink and blue respectively, it is possible to more reliably prevent erroneous mounting of each scope.

When the cover is attached to the cover endoscope, the cover holder holds the mouth of the cover in order to keep the cover hygienic without touching it. As shown in FIG. 17, in the conventional cover holder 150, a supporting member 152 is vertically installed on a stand 151, and a cylindrical holding member 154 for holding a mouth 161 of a cover 160 is attached to the cover holder 150. The member 153 is configured to move up and down on the support member 152.

The holding member 154 has a mounting member 155 formed in an inverted C shape, one end of which is fixed to an end portion of the mounting member 155 opposite to the opening end, and the other end of which is the sliding member 1.
The support rod 156 is fixed to the reference numeral 53, and is attached to and held by the step portion of the outer diameter of the mouth portion 161. Further, the sliding member 153 is provided with a female screw penetrating in the radial direction, and the fixing screw 1 is attached to the female screw.
57 is attached. After loosening the fixing screw 157 and moving the sliding member 153, the fixing screw 1
By tightening 57, the sliding member 153 can be fixed at an arbitrary position on the supporting member 152.

However, the conventional cover holder 150
Then, the holding member 154 can hold only a mouth part having the same holding diameter as the mouth part 161, and as shown in FIG. 18, another mouth part 16 having a holding diameter different from that of the mouth part 161.
2, 163 cannot support mouth parts of various sizes, such as being unable to hold.

Therefore, in the cover holder 70 shown in FIG. 8, the holding member 154 of the conventional cover holder 150 is improved so that it can be adapted to various sizes of mouth portions. In contrast to the conventional cover holder 150 described above, a holding member 71 whose holding diameter can be adjusted is provided instead of the holding member 154.

The holding member 71 is a set of blocks 7.
2, 73, mounting members 74, 75 fixed to the longitudinal end surfaces of the blocks 72, 73, one end fixed to the longitudinal rear end surface of one block 73, and the other end sliding. The support rod 76 fixed to the member 153 and the blocks 72, 73 are coupled to each other, and the blocks 72, 7
3 and the adjusting screw 77 for adjusting the relative position, and the mounting members 74 and 75 form a shape substantially similar to that of the mounting member 155.

That is, by adjusting the relative positions of the two blocks 72 and 73 with the adjusting screw 77, the holding diameter for holding the mouth portion can be changed, and various holding diameters can be changed. It is possible to deal with the body part.

Further, instead of the holding member 71, a holding member 81 shown in FIG. 9 may be used, and the mounting member 82 of the holding member 81 has a plurality of circles whose diameter increases from the root side to the tip side. The support rod 8 has a shape in which the tip end side is overlapped and is fixed to the sliding member 153 on the root side.
3 is fixed.

Cover holder 8 having the holding member 81
In 0, as shown in FIGS. 10 and 11, the mouth portions 90 and 91 having different sizes can be held by changing the holding position, and the size of the mouth portions differs with one cover holder. It is possible to support multiple covers.

Further, conventionally, in the endoscope for the cover,
Like an endoscope without a cover, it has a built-in light guide consisting of optical fiber bundles for accommodating the illumination light from the light source device, and a universal cord inserted inside this light guide extends from the operation section. There is. For this reason, the cover endoscope needs to cover not only the insertion portion and the operation portion but also the universal cord, which is one of the factors that complicate the mounting operation of the cover.

The cover 100 shown in FIG. 12 does not require a universal cord as compared with the cover endoscope, particularly the cover endoscope which is an optical endoscope having an eyepiece section. And an operation section cover section (not shown) that covers the operation section of the cover endoscope, without the universal code cover section that covers the universal code. ing.

The insertion section cover section 101 includes a mouth section 102 for fixing the operation section of the cover endoscope and a cover tip section 1.
03, the insert cover outer cover 10 that covers the cover tip portion 103 in an airtight manner and is airtightly coupled to the mouth body portion 102 to isolate the insert portion of the cover endoscope from the external environment.
It is composed of 4.

The insertion portion cover portion 101 has an air supply tube 105, a water supply tube 106, and a suction tube 107.
(See FIG. 13), and the tips of the air supply tube 105 and the water supply tube 106 have the cover tip 1
No. 03 air supply / water supply nozzle 109 facing the observation window 108
Forceps outlet 1 in which the tip of the suction tube 107 also serves as a suction port of the cover tip 103.
10 connected to each of the tubes 105, 106, 10
7 are bundled and extended from the rear end side of the insertion portion cover portion 101.

On the side surface of the mouth portion 102, a forceps insertion port 111 that communicates with the suction tube 107 and into which forceps can be inserted, and a cover endoscope when the cover endoscope is attached to or removed from the cover 100. An expansion tube mouth (not shown) for feeding expansion air is provided.

Further, as shown in FIG. 13, the insertion portion cover outer cover 104 has a three-layer structure, and in order from the outer side, a first layer formed of a soft vinyl tube 112,
The second layer is filled with the optical fiber bundle 113, and the third layer is made of a soft vinyl tube 114 as in the first layer.

The optical fiber bundle 113 of the second layer is shown in FIG.
14 is exposed to the outside at the tip portion 103, and as shown in FIG. 14, the outer tube 102 of the mouth portion 102 is exposed.
It is bundled at one place between a and the inner tube 102b, and is extended from the rear end of the mouth portion 102 while being covered with a soft vinyl tube.

The end of the optical fiber bundle 113 extending from the rear end of the mouth 102 is connected to the light source connection base 115 to guide the light incident from the light source to the outside from the cover tip 103. To the observation window 1 by the cover endoscope attached to the cover 100 by emitting the illumination light to the cover 100 as illumination light.
Help the observation from 08.

That is, since the light guide is built in the cover 100, the light guide is not required for the cover endoscope attached to the cover 100, and therefore, the universal cord for inserting the light guide is not necessary. For this reason, the universal cord cover portion for covering the universal cord is not necessary, the work of attaching the cover to the cover endoscope is simplified, and the cover attachment time can be shortened.

Here, in the optical endoscope having the eyepiece at the rear end of the operation portion, the diopter adjusting mechanism of the eyepiece is operated for endoscopic examination. Therefore, the same structure is adopted also in the cover endoscope. However, since the entire cover endoscope including the operating portion is covered with the cover, conventionally, it was not easy to adjust the diopter of the eyepiece of the cover endoscope with the cover attached.

The cover 120 shown in FIG. 15 includes an operation section cover section 121 for covering the operation section 170 of the cover endoscope which is an optical endoscope, and an eyepiece section 171 at the rear end of the operation section 170.
Is provided with an eyepiece cover 122. The eyepiece cover section 122 is formed in a bag shape having a large size with respect to the eyepiece section 171, and has a plurality of eyepiece caps each having an endoscope eyepiece diopter lens having different diopter. 122a, 122b, 122c are fixed or integrally formed, and each eyepiece cap 122a, 122b, 12
2c can be selectively attached to the eyepiece portion 171.

Therefore, the eyepiece cap 12 of the cover 120 is
2a, 122b, 122c are appropriately selected, and the selected eyepiece cap is provided with the eyepiece cover 1 having a large size.
By shifting 22 and replacing it with the eyepiece 171 of the cover endoscope 170, it is possible to easily adjust the diopter even during endoscopic surgery.

[0063]

As described above, according to the present invention, the portion corresponding to the bending portion and the flexible portion of the endoscope has uniform flexibility without impairing the flexibility of the flexible portion. Because
Excellent effects such as good operability of the endoscope can be obtained without impairing the insertability of the insertion portion of the endoscope itself into the subject.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a schematic configuration of an endoscope cover with a channel according to an embodiment of the present invention.

FIG. 2 is an overall view showing the configuration of an endoscope apparatus of a channel-equipped endoscope cover system as above.

FIG. 3 is the same as the above, but is a cross-sectional view of the insert cover portion.

FIG. 4 is a perspective view of the tip of the cover.

[Fig. 5] Same as above, a front view of the tip of the cover.

FIG. 6 is a cross-sectional view showing a mouth portion for fixing the operation portion of the two-way scope cover.

FIG. 7 is a cross-sectional view showing a mouth portion for fixing the operation portion of the four-direction scope cover.

FIG. 8 is a perspective view showing a holding member of the cover holder.

FIG. 9 is an explanatory view showing a holding member.

FIG. 10 is an explanatory view showing a state in which a mouthpiece for fixing the operation portion is held by a holding member.

FIG. 11 is an explanatory view showing a state in which the mouthpiece for fixing the operation portion is held by the holding member.

FIG. 12 is an external view of an endoscope cover with a channel.

FIG. 13 is a radial cross-sectional view of the insertion portion cover portion.

FIG. 14 is a radial cross-sectional view of a mouth portion for fixing the operation portion.

FIG. 15 is an explanatory view showing the rear end side of the operation portion cover portion.

FIG. 16 is a sectional view of the tip of the cover.

FIG. 17 is an explanatory view showing a conventional cover holder.

FIG. 18 is an explanatory view showing a relationship between a conventional cover holding member and an operating portion fixing mouth portion.

[Explanation of symbols]

 1 Endoscope Cover with Channel 2 Endoscope for Cover 18 Soft Section 19 Bending Section 28 Insert Section Cover Skin

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yoshihiro Iida 2-43-2 Hatagaya, Shibuya-ku, Tokyo Olympus Optical Co., Ltd. (72) Inventor Akira Suzuki 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 2-43-2 Hatagaya, Shibuya-ku, Tokyo Within Olympus Optical Co., Ltd.

Claims (1)

[Claims] 1. An endoscope cover with a channel for covering an endoscope, wherein a portion corresponding to a curved portion and a flexible portion of the endoscope is uniform without impairing flexibility of the flexible portion. An endoscope cover with a channel, which has excellent flexibility.