JP2001061760A - Cover sheath type rigid endoscope - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cover sheath type rigid endoscope which allows the efficient use of the rigid endoscope suitable for surgical operation of the brain and a cover sheath 3 for the rigid endoscope. SOLUTION: The rigid endoscope 2 provided with a crank part 17 formed to a crank shape on the operator side of a rigid insertion part 4 is constituted by covering the crank part 17 with a flexible sheath part 10 of a flexible tubular body by the cover sheath 3 and covering the side nearer the front end than the crank part 17 with a rigid sheath part 9, by which the mounting to the rigid endoscope is made easy and the repetitive use for the surgical operation of the brain with the same rigid endoscope by the exchange of the cover sheath 3 is made possible.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cover sheath type rigid endoscope for covering a rigid endoscope with a cover sheath.

[0002]

2. Description of the Related Art An endoscope used in a surgical operation is used after sterilization to prevent an infection. As the sterilization means, gas sterilization of ethylene oxide or the like, immersion sterilization in a chemical solution, autoclave (high-temperature, high-pressure steam) sterilization, etc. are generally used. It is in.

However, in the autoclave sterilization, if the autoclave sterilization is performed on an endoscope having no resistance to high-temperature and high-pressure steam, the endoscope itself may be damaged.

On the other hand, there is disclosed an apparatus in which a cover that completely covers the endoscope is provided and the cover is disposable or autoclavable, instead of sterilizing the endoscope itself.

[0005] For example, Japanese Patent Application Laid-Open No. 8-308785 discloses a cover-type endoscope apparatus provided with a cover mounting aid that allows easy mounting of a cover and has good storage and storage properties.

[0006]

Since an endoscope used in brain surgery is used under a microscope, an operation section, an eyepiece, or an endoscope of the endoscope is grasped in a field of view of the microscope. The insertion part has a crank shape so that the finger to be inserted does not hinder the insertion. Conventionally, there has not been proposed any one that covers a rigid endoscope having an insertion portion having such a shape with a cover.

(Object of the Invention) The present invention has been made in view of the above points, and a cover-sheath type rigid endoscope and a rigid endoscope which can efficiently use a rigid endoscope suitable for brain surgery. It is an object to provide a mirror cover sheath.

[0008]

A rigid endoscope having a rigid insertion portion, wherein a proximal side of the insertion portion has a crank shape,
A cover sheath that covers at least the entire insertion portion in a water-tight manner and that covers at least the crank-shaped portion with a soft tube, whereby the crank-shaped portion can be easily covered with a soft tube; , And has a crank-shaped part, making it easy to perform brain surgery smoothly.Replacement of the cover sheath with a clean cover sheath after use enables reuse and efficient brain surgery be able to.

Further, in a rigid endoscope in which the proximal side of the rigid insertion portion has a crank shape, at least the entire insertion portion is watertightly covered, and at least a portion covering the crank shape portion is formed of a soft tube. By covering the rigid endoscope having the crank-shaped portion with the endoscope cover sheath, it can be used for brain surgery similarly to the rigid endoscope having the crank-shaped portion without the cover sheath, and after use. Without disinfecting or sterilizing the rigid endoscope, which is required in the case of a rigid endoscope having a crank-shaped portion without a cover sheath, brain surgery can be performed again by replacing with a clean cover sheath. And efficient use is possible.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. (First Embodiment) FIGS. 1 to 3 relate to a first embodiment of the present invention, FIG. 1 shows an appearance of a rigid endoscope in the first embodiment, and FIG. 2 shows a cover sheath. FIG. 3 shows the configuration of a cover sheath type rigid endoscope according to the first embodiment of the present invention.

As shown in FIG. 3, a cover sheath type rigid endoscope 1 according to a first embodiment of the present invention has a rigid endoscope 2 and a cover which covers almost the entire rigid endoscope 2 in a watertight manner. And a sheath 3.

As shown in FIG. 1, a rigid endoscope 2 is inserted into a living body such as the inside of a brain, and is provided with a rigid and elongated insertion section 4 and a rear end of the insertion section 4 and is grasped by an operator. A grip portion 5, a flexible cable portion 6 extending from a rear end of the grip portion 5, and a light guide connector 7 branching and extending from a branch portion at a rear end of the cable portion 6. And a guide connector 8.

The light guide connector 7 is detachably connected to a light source device (not shown), and illumination light is supplied to the light guide connector 7 from the light source device.

The image guide connector 8 is detachably connected to a TV camera device or the like (not shown), and an optical image transmitted to the rear end of the image guide connector 8 is a TV.
An image is picked up by an image sensor of the camera, the signal is further processed, and a video signal is output to a monitor device, so that the captured image can be displayed on a monitor screen.

As shown in FIGS. 2 and 3, the cover sheath 3 covering the rigid endoscope 2 includes a rigid sheath 9, a flexible sheath 10 provided at the rear end of the rigid sheath 9, and a flexible sheath 10. Fixing ring 11 provided at the rear end of sheath portion 10
And a cable cover part 12 whose front end is connected to the rear end of the flexible sheath part 10 by the fixing ring 11.

As shown in FIG. 1 or FIG.
The insertion part 4 is formed of a hard pipe such as stainless steel or hard plastic, and a mantle pipe 13 is formed. A tip frame 14 is connected to a tip of the mantle pipe 13.
(Insertion part) The tip part is formed. The hard pipe and the end frame 14 may be formed integrally.

An illumination window 15 and an observation window 16 are formed on the end surface of the end frame 14. In this case, an observing window 16 is provided in a perspective direction in which the observing direction is obliquely forward, and an illuminating window 15 is provided so as to illuminate an affected part or the like in this direction, thereby forming a perspective rigid endoscope.

The front end of the mantle pipe 13 has a straight circular tube shape. The rear end (hand side) of the mantle pipe 13 is bent obliquely, and the part at a slightly rearward position is bent again in the opposite direction. Crank part 17 with crank shape
The rear end side of the crank portion 17 is also a straight circular tube (similar to the front end side of the crank portion 17), extends rearward in a state parallel to the front end side, and has a large diameter. Is connected to the gripping portion 5.

As shown in FIG. 3, a light guide fiber 21 for transmitting illuminating light and an image guide fiber 22 for transmitting an optical image are inserted through the inside of the insertion section 4, and these are passed through the cable section 6. (See FIG. 1), the optical fiber is branched into a light guide fiber 21 and an image guide fiber 22, and its rear ends extend to the light guide connector 7 and the image guide connector 8, respectively. Then, by connecting the light guide connector 7 to the light source device, the illuminating light is transmitted and emitted from the distal end surface fixed to the illuminating window 15.

A tip member 23 is mounted inside the tip frame 14, and an illumination window 15 is formed in a space defined by the tip frame 14 and the tip member 23 so that the tip of the light guide fiber 21 is bent. And is positioned and fixed so that the illumination light can be emitted in a perspective direction.

The observation window 1 provided on the tip member 23
A lens frame 25 to which an objective optical system 24 is attached is fixed to 6.

As described above, with respect to the axial direction of the insertion portion 4,
The light guide fiber 21 emits illumination light obliquely forward, and forms an illuminated optical image of the affected part or the like in the oblique direction by the objective optical system 24. Tie in position. Therefore, the objective optical system 2
Numeral 4 employs a prism in addition to the lens, reflects light from a perspective direction by the prism, converts the light into an axial direction of the insertion section 4, and arranges the observation image ( (Optical image) An image is formed on the distal end surface of the image guide fiber 22 as a transmission means.

The tip of the image guide fiber 22 is fixed to the lens frame 25 via a base, and transmits an optical image to the image guide connector 8 at the rear end. Then, an optical image transmitted by a TV camera connected to the image guide connector 8 is captured and displayed on a monitor device.

The cable section 6 provided at the rear end of the grip section 5 covers the light guide fiber 21 and the image guide fiber 22 with a flexible tube such as silicon or Teflon, so that the cable section 6 can be freely bent. be able to.

On the other hand, the hard sheath portion 9 of the cover sheath 3 is formed of a hard and straight pipe such as stainless steel or hard plastic, and the inner diameter thereof is slightly smaller than the outer diameter of the insertion portion 4 of the hard endoscope 2. It is set large.

The length of the rigid endoscope 2 is set shorter than the length of a straight portion from the distal end surface of the rigid endoscope 2 to the crank portion 17, and the distal end side of the insertion portion 4 is covered with the rigid sheath portion 9. In this case, the rear end of the rigid sheath 9 is
7 (or does not reach the crank 17).

The distal end surface of the rigid sheath portion 9 is opened in an inclined shape, and an extremely thin and transparent cover sheet 27 of polyvinylidene chloride or the like is liquid-tightly fixed to the opening portion with an adhesive or the like. When the cover sheath 3 is attached to the rigid endoscope 2, the cover sheath 3 is provided so as to be in close contact with the (slope) tip surface of the objective optical system 24 and the slope light guide fiber tip surface.

At the rear end of the hard sheath 9, a soft sheath 10 which is a soft tube made of silicon, Teflon or the like is connected in a liquid-tight manner with an adhesive or the like. Reference numeral 10 denotes a crank portion 17 as shown in FIG.
To the front end of the grip 5.

The inner diameter of the soft sheath portion 10 is set to be substantially the same as the outer diameter of the crank portion 17. The rear end of the flexible sheath portion 10 is liquid-tightly fixed to the front end of the fixing ring 11 with an adhesive or the like, and is connected to the cable cover portion 12 which is also a soft tube via the fixing ring 11. I have. The dimensions and shape of the fixing ring 11 are formed so that the crank part 17 can be passed through. That is, the length is set to be appropriate for the curvature of the curve of the crank portion 17.

The inner diameter of the cable cover portion 12 whose front end is liquid-tightly connected to the rear end of the fixing ring 11 is provided to be larger than the outer diameter of the insertion portion 4 and the outer diameter of the cable 6.
The length is set so as to cover the vicinity of the branch portion between the light guide connector 7 and the image guide connector 8.

As described above, the cover sheath 3 has a bag shape having a liquid-tight structure in which the connecting portions of the constituent members are connected so as to maintain the liquid-tight structure, and is provided so as to cover the rigid endoscope 2. The rigid endoscope 2 can be liquid-tightly covered up to the vicinity of the branch portion.

Next, the operation of the present embodiment will be described. In the case of performing a surgical operation on the brain using the rigid endoscope 2,
The distal end side of the insertion portion 4 of the rigid endoscope 2 is inserted from the opening of the cable cover portion 12 at the rear end of the cover sheath 3 which has been set in a clean state (by disinfection, sterilization, or the like) in advance, and covers the end portion. And the cable cover part 1 of the cover sheath 3
2. Insertion section 4 in the order of 2, fixing ring 11, and soft sheath section 10.
The cover sheath 27 is covered so as to pass through the crank portion 17 near the rear end, and the cover sheet 27 of the cover sheath 3 is brought into close contact with the distal end surface of the insertion portion 4 to complete the mounting. The state of the endoscope 1 can be set.

The cover sheath type rigid endoscope 1 in which the rigid endoscope 2 is covered with a clean cover sheath 3 in a water-tight manner allows the brain to be operated smoothly under a microscope. In this case, since the crank portion 17 is formed,
Surgery can be performed smoothly without obstructing the field of view of the microscope on the rear side.

After completion of the surgical operation, the cover sheath 3 is removed, and when performing a surgical operation, a new clean cover sheath 3 may be used. In this case, the cover sheath 3 may be disposable, or the cover sheath 3 may be autoclavable.

According to the present embodiment, even when the rigid endoscope 2 itself does not have resistance to autoclave sterilization, it is mounted in a watertight manner with the cover sheath 3 so that the surgical operation of the brain can be performed in a clean state. The proximal end of the insertion section 4 suitable for use in surgery can be used as a rigid endoscope having a crank shape.

After use, the attached cover sheath 3 is removed and a new clean cover sheath 3 is attached, so that the same rigid endoscope 2 can be used again for brain surgery. it can.

In other words, when the cover sheath 3 is not used, the rigid endoscope 2 must be immersed in a disinfecting solution or the like for a long time to disinfect it. By exchanging, the same rigid endoscope 2 can be used repeatedly, and can be used efficiently or economically (which does not require a large number of rigid endoscopes).

Since at least a portion of the cover sheath 3 covering the crank portion 17 is formed of a soft tube, the operation of mounting the cover sheath 3 on the hard endoscope 2 can be easily performed. In addition, since the portion covering the distal end side from the crank portion 17 is a hard (hard) tube body, the covering operation can be performed more easily than in the case of a soft tube body.

In other words, even if the insertion section 4 of the rigid endoscope 2 is rigid and has a crank shape, the cover sheath 3 can be easily attached and detached. The cover sheath 3 may be disinfected, sterilized, or disposable.
Reuse of the rigid endoscope 2 is easy.

(Second Embodiment) Next, a second embodiment of the present invention will be described with reference to FIGS. FIG. 4 illustrates a cover sheath type rigid endoscope according to a second embodiment of the present invention, and FIG. 5 illustrates a state in which the cover sheath is torn.

As shown in FIG. 4, a cover-sheath type rigid endoscope 31 according to a second embodiment of the present invention includes a rigid endoscope 2 (having a configuration similar to that of the first embodiment) and the rigid endoscope 2. Endoscope 2
And a cover sheath 33 that is attached so as to cover in a liquid-tight manner.

The cover sheath 33 according to the present embodiment is a rigid sheath portion, a flexible tube portion 35 provided at the rear end of the rigid sheath portion 34, and a flexible tube portion 35 at the rear end of the rigid sheath portion 34. The flexible tube 35 includes a fixing ring 36 that is connected to the flexible tube 35, and a breaking thread 37 whose one end is fixed near the front end of the flexible tube 35 and whose other end extends to the rear end of the flexible tube 35.

The rigid sheath 34 is formed of a hard straight pipe such as stainless steel or rigid plastic, and the inner diameter thereof is set slightly larger than the outer diameter of the insertion section 4 of the rigid endoscope 2.

The length is set shorter than the length of a straight portion from the distal end surface of the rigid endoscope 2 to the crank portion 17. The rigid sheath portion 34 covers the distal end side of the insertion portion 4. In this case, the rear end of the rigid sheath 34 does not reach the crank 17 (or does not reach the crank 17).
Like that.

An extremely thin and transparent cover sheet 27 made of polyvinylidene chloride or the like is liquid-tightly fixed to the distal end of the rigid sheath 34 with an adhesive or the like as in the first embodiment. When the cover sheath 3 is attached to the rigid endoscope 2, the cover sheath 3 is provided so as to be in close contact with the inclined distal end surface of the objective optical system 24 or the like. At the rear end of the rigid sheath portion 34, a ring-shaped projection 38 is provided integrally with the rigid sheath portion 34, protruding radially outward from the outer peripheral surface in a ring shape.

The flexible tube 35 is formed of a flexible tube such as silicon or Teflon, and is provided separately from the rigid sheath 34. Then, as shown in FIG. 4, when the flexible tube 35 is mounted on the rigid endoscope 2, the ring-shaped protrusion 38 is set in a state where the distal end portion of the flexible tube 35 gets over the ring-shaped protrusion 38.

The fixing ring 36 is formed in a short cylindrical shape, the inner diameter of which is larger than the outer diameter of the rigid sheath portion 34. By moving to the rear side to set the state in which the protrusion 38 is covered by the fixing ring 36, the distal end of the flexible tube portion 35 that has passed over the protrusion 38 can be pressed against the inner surface of the fixing ring 36 to be fixed in a watertight manner. It has dimensions. In FIG. 4, the fixing ring 35 has a structure in which the fixing ring 35 comes off from the rigid sheath portion 34. However, by providing a stopper such as a projection (not shown) on the rigid sheath portion 34, the fixing ring 35 may be configured to be slidable and not fall off. .

A breaking thread 37 is provided inside the flexible tube 35 along the axial direction thereof, and the rear end of the breaking thread 37 is led out from the inside of the flexible tube 35 to the outside. A spherical portion is provided at the rear end so that the user can easily hold the finger and perform a breaking operation.

After being used for endoscopy, FIG.
By performing an operation of gripping and pulling the rear end of the breaking thread 37 as shown in FIG. 7, the flexible tube 35 can be torn in its axial direction.

In other words, by pulling the thread 37, a large force is applied to the portion of the flexible tube 35 which is pressed against the thin thread 37 in a line, so that the flexible tube 35 is torn in the axial direction.

It should be noted that instead of incorporating the breaking thread 37,
Perforating the flexible tube 35 itself in the axial direction,
A tear portion may be provided at the rear end. Other configurations are the same as those of the first embodiment.

Next, the operation of the present embodiment will be described. First, the flexible tube section 35 is covered from the distal end side of the insertion section 4 of the rigid endoscope 2. Next, the rigid sheath portion 34 is covered, and the distal end portion of the flexible tube portion 35 rides over the projection 38 at the rear end portion of the rigid sheath portion 34, and the fixing ring 3 is fixed.
5 is moved rearward so that the distal end portion of the flexible tube portion 35 that has passed over the projection 38 into the fixing ring 35 is press-fitted, and the mounting is completed.

The cover sheath type rigid endoscope 31 is used for a surgical operation of the brain or the like. After the endoscope 31 is used, the flexible tube 35 can be torn in the axial direction by gripping and pulling the rear end of the breaking thread 37.

Then, the fixing ring 35 is moved forward to discard the torn soft tube portion 35, and the hard sheath portion 34 and the fixing ring 35 can be sterilized and set to a clean state by autoclave sterilization or the like. It can be reused when the next endoscope is used.

This embodiment has the following effects. The removal of the flexible tube portion 35 from the rigid endoscope 2 can be easily performed. Further, the rigid sheath portion 34 is reused,
The flexible tube section 35 can be used for endoscope inspection in a disposable form, and disinfection or sterilization work is easy. Since the hard sheath portion 34 and the soft tube portion 35 are separate bodies,
The attachment work to the rigid endoscope 2 is easy. Other, first
There is an effect similar to that of the embodiment.

(Third Embodiment) Next, a third embodiment of the present invention will be described with reference to FIGS. FIG. 6 shows the cover sheath type rigid endoscope according to the third embodiment of the present invention in a state where the cover sheath is being set to the mounted state, and FIG. 7 shows the cover sheath in a state where the cover sheath is completely set to the mounted state. 1 shows a rigid endoscope.

As shown in FIG. 6, a cover sheath type rigid endoscope 41 according to a third embodiment of the present invention is a rigid endoscope 42.
And the cover sheath 4 that covers the rigid endoscope 42 in a watertight manner.
And 3.

The rigid endoscope 42 according to the present embodiment has a structure in which a pair of pins 44 for stopping rotation are protrudingly provided on the grip 5 in the rigid endoscope 2 according to the first embodiment. .

The cover sheath 43 in the present embodiment includes a rigid sheath portion 45, a soft sheath portion 46 whose distal end is fixed to the rear end of the rigid sheath portion 45 in a watertight manner,
The fixing ring 4 fixed to the rear end of the soft sheath portion 46
And 7.

The basic structure of the hard sheath 45, the soft sheath 46, and the fixing ring 47 is the same as in the first embodiment. The difference from the first embodiment is that the inner diameter of the soft sheath portion 46 is formed sufficiently larger than the outer diameter of the insertion portion 4 of the hard endoscope 42, and the fixing ring 47 has A groove 48 into which the pin 44 is engaged is provided.

Then, as shown in FIG.
After covering the crank portion 17 with 6, the flexible sheath portion 46 is twisted as shown in FIG. Pin 44 is inserted into groove 48 of fixing ring 47.
And the fixing ring 47 can be detachably fixed to the grip portion 5 without rotating.

Next, the operation of the present embodiment will be described. The cover sheath 43 is covered from the distal end side of the insertion section 4 of the rigid endoscope 42 to be in a state as shown in FIG. In this case, since the inner diameter of the soft sheath portion 46 on the rear end side of the cover sheath 43 is sufficiently large, not only the operation of covering the distal end side of the insertion portion 4 but also the operation of covering the crank portion 17 on the rear end side is performed. Easy to do.

Next, by twisting the fixing ring 47, the flexible sheath portion 46 is made into a spiral shape, and is brought into close contact with the crank portion 17. Finally, the pin 44 of the grip 5 is inserted into the groove 48 of the fixing ring 47 to engage the fixing ring 7 so as not to rotate, thereby completing the mounting.

This embodiment has the following effects. Since the flexible sheath 46 is formed sufficiently larger than the outer diameter of the insertion section 4 of the rigid endoscope 42, the cover sheath 43 can be easily attached to and detached from the rigid endoscope 42. Further, since the flexible sheath portion 46 can be brought into close contact with the crank portion 17 by twisting it, it is possible to minimize the obstruction of the field of view of the microscope. Although the above description is particularly suitable for brain surgery, the present invention can be effectively applied to other surgery and the like.

[Supplementary Notes] A rigid endoscope having a rigid insertion portion, and a proximal end of the insertion portion is formed in a crank shape, so that at least the entire insertion portion is water-tightly covered, and at least the crank shape portion is covered with a soft tube. And a cover sheath.

2. A rigid endoscope in which a rigid insertion portion has a crank-shaped proximal end that water-tightly covers at least the entire insertion portion and at least a portion that covers the crank-shaped portion is formed of a soft tube. Endoscope cover sheath. 3. The insertion portion has a rigid rigid endoscope, and a cover sheath that covers the outside thereof, wherein the insertion portion of the rigid endoscope has a crank shape on the proximal side, and at least a crank shape portion of the insertion portion of the cover sheath. A rigid endoscope and a cover sheath, wherein a portion to be covered is formed of a soft tube. 4. 3. The cover sheath according to claim 3, wherein a portion of the cover sheath covering the distal end portion of the insertion portion of the rigid endoscope from the crank-shaped portion is formed of a hard pipe.

5. In the appendices 3 and 4, the distal end of the cover sheath is closed in a liquid-tight manner by a transparent and ultra-thin sheet member, and the connection portions including the flexible tube in the appendix 3 and the hard pipe in the appendix 4 are similarly liquid-tight. A cover sheath connected to the cover sheath. 6. 3. The cover sheath according to appendices 3 and 4, wherein the hard pipe portion and the soft tube portion of the cover sheath are formed separately, and a means for detachably fixing the both is provided.

7. 3. The cover sheath according to any one of supplementary notes 3 to 6, further comprising means for breaking the flexible tube of the cover sheath along the axial direction. 8. In Supplementary Notes 3 to 6, the inner diameter of the flexible tube of the cover sheath was provided sufficiently larger than the outer diameter of the insertion portion of the rigid endoscope, and the flexible tube was wound around the crank-shaped portion when attached to the rigid endoscope. A rigid endoscope and a cover sheath provided so as to be fixed in a state.

[0069]

As described above, according to the present invention, a rigid endoscope having a rigid insertion portion, the proximal side of which is formed in a crank shape, and at least the entire insertion portion are made watertight. A cover sheath that covers and at least covers the crank-shaped portion with a soft tube;
The crank-shaped part can be easily covered with a soft tube, and it is covered with this cover sheath.Since it has a crank-shaped part, it is easy to perform brain surgery smoothly, and replace the cover sheath with a clean cover sheath after use. By doing so, re-use is possible, and brain surgery can be performed efficiently.

Further, in a rigid endoscope in which the proximal side of the rigid insertion portion has a crank shape, at least the entire insertion portion is water-tightly covered, and at least a portion covering the crank shape portion is formed of a soft tube. By covering the rigid endoscope having the crank-shaped portion with the endoscope cover sheath, it can be used for brain surgery similarly to the rigid endoscope having the crank-shaped portion without the cover sheath, and after use. Without disinfecting or sterilizing the rigid endoscope, which is required in the case of a rigid endoscope having a crank-shaped portion without a cover sheath, brain surgery can be performed again by replacing with a clean cover sheath. And efficient use is possible.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an appearance of a rigid endoscope according to a first embodiment of the present invention.

FIG. 2 is a perspective view showing an appearance of a cover sheath.

FIG. 3 is a cross-sectional view showing a configuration of a cover sheath type rigid endoscope according to the first embodiment of the present invention.

FIG. 4 is a sectional view showing a configuration of a cover sheath type rigid endoscope according to a second embodiment of the present invention.

FIG. 5 is a diagram showing a state in which the cover sheath is torn.

FIG. 6 is a cross-sectional view showing a cover sheath type rigid endoscope according to a third embodiment of the present invention in a state in which a cover sheath is being set to a mounted state.

FIG. 7 is a cross-sectional view showing the cover sheath type rigid endoscope in a state where the cover sheath is set in a mounted state.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Cover sheath type rigid endoscope 2 ... Hard endoscope 3 ... Cover sheath 4 ... Insertion part 5 ... Grip part 6 ... Cable part 7 ... Light guide connector 8 ... Image guide connector 9 ... Hard sheath part 10 ... Soft sheath Part 11: Fixing ring 12 ... Cable cover part 13 ... Cover pipe 14 ... Tip frame 15 ... Illumination window 16 ... Observation etc. 17 ... Crank part 21 ... Light guide fiber 22 ... Image guide fiber 23 ... Tip member 24 ... Objective optical system 25 … Lens frame 27… Cover sheet

Claims (2)

[Claims] 1. A rigid endoscope having a rigid insertion portion and a proximal side of the insertion portion formed in a crank shape, a rigid endoscope that covers at least the entire insertion portion in a water-tight manner, and at least a soft end portion of the crank shape portion. A cover sheath type rigid endoscope comprising: a cover sheath covered by a tube; 2. A rigid endoscope in which a rigid insertion portion has a crank-shaped proximal side, wherein at least the entire insertion portion is water-tightly covered, and at least a portion covering the crank-shaped portion is formed of a soft tube. A cover sheath for a rigid endoscope, comprising: