JPH0847476A - Cover type endoscope - Google Patents

Abstract

PURPOSE:To achieve a higher transmitting property of a twisting action to a tip part by arranging a flexible pipe part provided on an inserting part cover to be made up of a three-layer structure of a spiral pipe, a knitted pipe and a skin. CONSTITUTION:A spiral pipe made of a metal material is connected securely to the rear end side of a third joint piece by a soldering or the like and the rear end part of the spiral pipe is fixed on a mounting part of an operating part structure section 64. The external surface of the spiral pipe is covered with a knitted pipe having a metal wire knitted over the overall length thereof and fixed on the tip part and the rear part of the spiral pipe by soldering. A skin made of a tube of elastic material such as rubber or the like is bonded securely over the overall length of the knitted pipe. A flexible pipe 63 of an inserting part cover 6 is held with a right hand to be twisted properly, a bending operation knob 22b is turned and a bending part 62 is bent properly to perform an inspection processing. Thus, the flexible pipe part 63 is made up of a three- layer structure of the spiral pipe, the knitted pipe and the skin and is excellent in transmit ting property of a twisting force to the tip with proper elasticity and flexibility.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cover type endoscope including a cover endoscope and an endoscope cover.

[0002]

2. Description of the Related Art Conventionally, when an endoscope that has been used once is reused, cleaning and sterilization processes have been performed so as to prevent infectious diseases from being caused by the endoscope. However, it takes a considerable amount of time to surely sterilize the used endoscope, which causes a problem of reducing the use efficiency of the endoscope.

Therefore, by using the endoscope itself covered with a cover and discarding only the cover after the case,
A cover-type endoscope has been proposed in which the endoscope itself is kept clean. This cover type endoscope is composed of a cover endoscope including an observation optical system and an illumination optical system, and an endoscope cover that covers the cover endoscope, and
Cover the sterilized cover endoscope with a sterilized endoscope cover, and insert the cover endoscope covered with this endoscope cover into the body cavity of the patient for inspection and treatment. It is a thing. Then, after the inspection and treatment, only the endoscope cover is removed from the cover endoscope and discarded, and a new sterilized endoscope cover is attached to the cover endoscope and reused. This allows the cover endoscope to be used continuously without cleaning or disinfecting.

[0004]

However, in the above-described cover-type endoscope, since the cover endoscope is inserted into the body cavity of the patient while being covered with the endoscope cover, examination and treatment are performed. When the insertion portion of the cover-type endoscope is twisted to aim the observation optical system of the cover endoscope in a desired direction, the grip of the endoscope cover and the cover endoscope insertion portion The slippage of the endoscope sometimes twists only the endoscope cover, and the twisting force may not be transmitted to the endoscope insertion portion for the cover.

Further, in order to integrally twist the endoscope cover and the cover endoscope insertion portion, the endoscope cover and the cover endoscope insertion portion are gripped with a strong force so as to be in close contact with each other. It had to be done, and there was a problem that the arm was very tired.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a cover-type endoscope including an endoscope cover having good twisting operability.

[0007]

A cover-type endoscope of the present invention is a cover having an endoscope having a flexible insertion portion and an insertion portion cover that covers at least the entire length of the insertion portion of the endoscope. In the method endoscope, the insertion section cover is provided with a twisting force transmitting means for transmitting a twisting force applied to a base end section of the insertion section cover to a distal end section of the insertion section cover.

[0008]

According to this structure, when the base end portion of the insertion portion cover is twisted by the hand holding it, this twisting force is transmitted to the distal end portion of the insertion portion cover via the twisting force transmitting means, The tip part is twisted according to the twisting force applied to the base part.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 8 relate to an embodiment of the present invention.
Is a diagram showing a schematic configuration of a cover-type endoscope system, FIG.
Is a diagram showing a cover endoscope with a disposable cover attached,
3 is a view for explaining the connection of the nozzle to the tip portion, FIG. 4 is a view showing the suction fixing cylinder and the suction tube, FIG. 5 is a cross-sectional view of the curved portion of the insertion portion cover, and FIG. 6 is a view of the insertion portion cover. FIG. 7 is a sectional view of the flexible tube portion, FIG. 7 is a diagram showing a schematic configuration of an operating portion of the cover-type endoscope, and FIG. 8 is a sectional view showing an outline of the operating portion cover.

As shown in FIG. 1, a cover type endoscope system 1 is composed of a cover type endoscope 2, a control device 3, a monitor 4 and the like.

The cover-type endoscope 2 has a reusable type insertion portion 22 which forms an insertion portion 21 of the cover-type endoscope 2 and covers the endoscope 5 for cover and which can be washed and sterilized. The cover 6 and the operation unit 23 of the cover-type endoscope 2
A hard operating section cover 7 for forming a cover, a disposable cover which will be described later covering the endoscope 5 for the cover, and an air supply tube 8
1. A water supply tube 82 and a suction tube 83 are provided. Reference numeral 92 is a cover portion of a disposable cover described later.

The cover endoscope 5 inserted through the insert cover 6 has flexibility, and the observation optical system 52, the solid-state image sensor 53, and the light guide fiber (not shown) are provided at the distal end side of the insert 51. While the connector is installed, the connector 5 is
4, the connector 54 is detachably connected to the socket 31 of the control device 3.

By connecting the connector 54 and the socket 31, the illumination light of the light source device provided in the control device is transmitted to the light guide fiber.
The subject image illuminated by this illumination light is formed on the solid-state image sensor 53, converted into an electric signal, transmitted to a video processor in the control device, and reconverted into an image signal, and the subject image is displayed on the monitor 4. indicate.

The cover endoscope 5 is inserted into the insertion portion cover 6 while being covered with the disposable cover. That is, as shown in FIG. 2, the disposable cover 90 is made of, for example, a hard plastic and has a lens cover 94 disposed at its tip, and eliminates a cover endoscope fitting concave portion 95 and dirt attached to the lens cover 94. The nozzle mounting hole 97 for mounting the nozzle 96, the suction through hole 98, and the like are formed at the tip portion 91 by watertightly adhering the cover portion 92 made of an elastic member such as soft plastic or rubber. The disposable cover 90 covers the entire length of the cover endoscope 5, and as shown in FIG. 1, the large diameter portion 93 at the proximal end of the disposable cover 90 is controlled by the elastic fixing member 33. It is detachably attachable to a ring-shaped engaging portion 32 formed in the device 3.

A fluid tube, more specifically, an air supply tube 81, a water supply tube 82 and a suction tube 83 are connected to the tip portion 91 of the cover as shown in FIGS. 3 and 4, respectively.

That is, as shown in FIG.
A nozzle 96 having the air supply tube 81 connected to the rear end of the nozzle 96 is removably fitted and fixed in the nozzle mounting hole 97 provided in the nozzle 96 through the fixed cylinder 11. The water supply tube 82 is also connected to the rear end of the nozzle similarly to the air supply tube 81, and is detachably fitted and fixed to the nozzle mounting hole provided at the front end through the fixed cylinder.

The fixed cylinder 11 has a through hole 12 through which the nozzle 96 is fixed, and two fixing protrusions 13 and 1 for fixing.
3 and a peripheral groove 14 in which an O-ring 15 for ensuring watertightness between the outer side and the inner side of the tip portion is provided.

The nozzle mounting hole 9 of the tip portion 91 is also provided.
A switching portion 91 in which the protruding portions 13 and 13 can be inserted in the vicinity of 7
a, 91a, a groove 91b for fixing the protruding portion, and a small diameter portion 91c with which the front end surface of the fixed cylinder abuts are formed.

That is, in order to insert and fix the fixed cylinder 11 into the nozzle mounting hole 97, first, for example, the air supply tube 81 that is adhesively fixed to the nozzle 96 is passed through the nozzle mounting hole 97. Next, the protruding portion 1 of the fixed cylinder 11
The fixed cylinder 11 is pushed into the nozzle mounting hole 97 by aligning the positions of the switching parts 91a, 91a of the connection parts 91 with each other, and the tip end surface of the fixed cylinder 11 is brought into contact with the small diameter part 91c. At this time, the nozzle 96 is rotated clockwise to bring the protrusions 13 and 13 into contact with a stopper portion (not shown) provided on the tip portion 91, so that the opening 96a of the nozzle 96 faces the lens cover 94. Then, the proximal end of the air supply tube 81 is connected and fixed to the mouthpiece 34 provided in the control device 3.

Incidentally, the nozzle to which the water supply tube 82 is connected is also fixed to the nozzle mounting hole via the fixed cylinder similarly to the air supply tube 81. Further, when the disposable cover 90 is attached to the cover endoscope 5, the lens cover 94, the observing optical system 11 and the light guide fiber (not shown) are provided opposite to each other. Further, the small diameter portion 91c
The inner diameter of is naturally larger than the outer diameter of the air supply tube 81 (water supply tube 82).

On the other hand, as shown in FIG. 4, the suction tube 83
The tip of the is fixedly adhered to the suction fixing cylinder 41. The suction fixing cylinder 41 has the same structure as the nozzle fixing cylinder 11, and has a through hole 42 and two fixing protrusions 43, 43.
Further, a circumferential groove 44 for arranging an O-ring 45 for ensuring watertightness between the outer side and the inner side of the tip portion and a slot groove 46 formed in a straight line on the opening side end surface are formed. Further, in the vicinity of the suction through hole 98 of the tip portion 91, a notch portion (not shown) through which the protrusion portions 43, 43 can be inserted, a groove for fixing the protrusion portion, and a small diameter portion with which the tip surface of the fixed cylinder abuts are formed. ing.

For this reason, the suction fixed tube 41 is connected to the tip end similarly to the nozzle fixed tube 11. That is, first, the suction tube 83 adhered and fixed to the suction fixing cylinder 41 is passed through the suction through hole 98. Next, in the same manner as when the fixed cylinder 11 is fitted and connected to the protruding portions 43, 43, a suction through hole 98 is formed.
Just fit in. Then, the proximal end of the suction tube 83 is connected to the mouthpiece 36 provided in the control device 3. When rotating the suction fixed cylinder 41, the slot 4
It suffices to insert the tip of a flat-blade screwdriver into # 6.

The insertion section cover 6 shown in FIG. 1 has a bending operation section 22, and the insertion section 21 of the cover type endoscope 2 is provided with a distal end forming section 61, a bending section 62, a flexible tube section 63 and an operation section. It is formed by the section structure section 64.

As shown in FIG. 5, the contact surface 99 of the distal end portion 91 of the disposable cover 90 is located approximately in the center of the distal end constituting portion 61.
Through-hole 70 having a ring-shaped contact portion 61a with which the
Are formed. A first joint piece 71 is adhered and fixed to the tip forming portion 61, and a second joint piece 71 is attached to the second joint piece 71.
The joint pieces 72 are pivotally fixed to the second joint piece 72, and the third joint piece 73 is pivotally fixed to the second joint piece 72. The tip of the bending wire 74 is brazed and fixed to the notch 71a of the first joint piece 71.

The tip of the elastic watertight tube 75 is adhered and fixed to the inner peripheral surface of the through hole 70 of the tip forming portion 61. This elastic watertight tube 75 is provided over the entire length of the insertion portion 21 of the cover type endoscope 2 and is provided with a curved portion 62,
By inserting the flexible tube portion 63, the operation portion forming portion 64 shown in FIG.
The rear end portion is adhesively fixed to the tube fixing portion 64a.

Incidentally, the first, second and third joint pieces 7
An elastic resin tube 79 made of rubber or the like is provided on the outer surfaces of the entire lengths of the 1, 72, and 73.
The front end portion and the rear end portion of 9 are respectively the first joint piece 71.
And is fixedly adhered to the third joint piece 73.

As shown in FIG. 6, a spiral tube 76 made of a metallic material such as SUS304 is connected and fixed to the rear end side of the third joint piece 73 by brazing.
The rear end portion is fixed to a mounting portion (not shown) of the operation portion constituting portion 64. On the outer surface of the spiral tube 76, a knitting tube 77 in which a metal wire is knitted is provided over the entire length, and is fixed to the front end and the rear end of the spiral tube 76 by soldering. An outer cover 78 formed of an elastic resin tube made of rubber, elastomer plastic or the like is adhered and fixed over the entire length of the knitted tube 77.

As described above, the tip portion 61, the bending portion 62, and the flexible tube portion 63 are formed, and the rear end of the flexible tube portion is formed into the operation portion forming portion 64.
, The inner peripheral surface of the operation portion cover 6 through which the cover endoscope 5 is inserted is formed in a watertight manner. Also,
The flexible tube portion 63 includes a spiral tube 76, a knitting tube 77, and an outer skin 78.
Since it has a layered structure, it has excellent elasticity and flexibility, and is excellent in transmitting the twisting force to the tip.

The braided pipe 77 may be soldered to the spiral pipe 76, and then the resin may be integrally coated by extrusion molding. The bending wire 74 may be covered with a coil pipe (not shown) made of a metal material such as SUS304 in the flexible tube 42. Further, the bending wire 74 is wound around a pulley (not shown) arranged in the operation portion forming portion 64 shown in FIG. 7, and the shaft 22 provided integrally with the pulley 22.
A bending knob 22b is provided on a to form the bending operation portion 22. In the present embodiment, the bending wire and the bending operation portion are described as being bent in, for example, two directions in the vertical direction for simplification, but the bending mechanism may of course be a four-direction bending in the vertical and horizontal directions.

As shown in FIGS. 7 and 8, the operating portion 23 of the cover-type endoscope 2 is composed of an operating portion forming portion 64 of the insertion portion cover 6 and a hard resin having a bottom and a U-shaped cross section. And a bottom portion 65 and a U-shaped portion 66.
The operating portion 23 is integrally formed by engaging the convex portion 67 provided along the entire length of the operating portion 23 with the engaging groove 68 provided in the operating portion constituting portion 64. A through hole 69 is formed in the side portion of the operation portion cover 7, and the cover portion 92 of the disposable cover 90 is led out from the through hole 69.

The operation of the cover-type endoscope system configured as described above will be described. First, the disposable cover 90 having the lens cover 94, the nozzles 96, 96, the air supply tube 81, the water supply tube 82, and the suction tube 83 set at the tip portion 91 is attached to the cover endoscope 5.

Next, the connector 54 of the endoscope 5 is connected to the socket 31 provided in the control device 3, and the air supply tube 81, the water supply tube 82, and the suction tube 83 are connected to the respective bases 34, 35, and 35. 36, and the rear end 93 of the disposable cover 90 is connected to the engaging portion 32 provided in the control device.

Next, the cover endoscope 5 covered with the disposable cover 90 is set on the insertion section cover 6 having a bending function, and the operation section cover 7 is engaged with the operation section constituting section 64.

Then, the flexible tube 63 of the insertion section cover 6 is grasped by the right hand, and twisted as appropriate, and the bending operation knob 22b.
Is rotated and the bending portion 62 is appropriately bent to perform an inspection procedure.

After the inspection is completed, first, the operation section cover 7 is removed from the operation section forming section 64, and the disposable cover 90 together with the cover endoscope 5 and the fluid tubes 81, 82, 83 is removed from the insertion section cover 6. Next, the cover endoscope 5 which is not contaminated at all from the disposable cover 90 is removed and used for the next inspection.

At this time, the air supply tube 81, the water supply tube 82 and the suction tube 83 are discarded together with the disposable cover 90. In addition, the operation section cover 7 and the insertion section cover 6
Is sterilized or disinfected with an autoclave, dipped in glutaral, EOG, etc., washed, and then used again.

As described above, since the flexible tube portion provided on the insertion portion cover is formed of the three-layer structure of the spiral tube, the knitted tube, and the outer cover, the transmission of the twisting motion to the tip portion is improved.

Further, since the operating portion cover is formed of a hard member, various fluid tubes that pass through the operating portion will not be broken or crushed.

Furthermore, since various tubes can be removed from the insert cover, the insert cover can be easily washed.

In addition, since the inner surface of the insertion portion cover is made watertight with an elastic watertight tube or the like, repeated cleaning, disinfection,
It is possible to provide a cover-type endoscope that can be sterilized, is hygienic, and has a low running cost.

Further, since the insertion portion cover is provided with the bending function, the bending operation of the flexible endoscope having no bending portion can be performed.

By preparing a plurality of operation section covers and insertion covers, it is possible to quickly perform various inspections and treatments with a single endoscope.

Further, only the tubes for air supply, water supply, and suction system may be disposed in the disposable cover to be disposable, and the other tubes may be reused. At this time, the tubes for air supply, water supply, and suction system may be used. Since it is not necessary to have a detachable structure, the structure is inexpensive.

Furthermore, it goes without saying that the insertion section cover with the bending mechanism may be disposable.

Further, the tube connected to the nozzle is not one in which the air supply tube and the water supply tube are individually connected to each nozzle as described above, but the air supply tube and the water supply tube are integrated at the tip end, for example. Connect the liquefied air / water supply tube to the rear end of one nozzle, and
It may be detachably fitted and fixed to the nozzle mounting hole 97 provided in the tip portion 91 via the.

Further, the suction tube may be bifurcated in the vicinity of the operating portion, and one may be used for inserting the treatment tool.

FIG. 9 is a diagram showing a schematic structure of a cover type endoscope having another structure.

As shown in the figure, in the present embodiment, the insertion portion cover 100 is composed of a tip forming portion 91a, a bending portion 101 made of an elastic member such as rubber, elastomer, and thin resin, and a flexible tube portion 63. Forming the insertion part 10
The rear end portion of 2 is connected to the mouth portion 103. The rear end of the bending portion 101 is connected and fixed to the flexible tube portion 63.

On the other hand, the endoscope 110 is provided with a distal end portion 111 in which an observation optical system, a solid-state image pickup device and an illumination optical system are arranged, and a plurality of joint pieces pivotally provided so that the endoscope 110 can be bent in four directions of up, down, left and right. 112, a flexible tube section 113, and an insertion section 114 having a substantially D-shaped cross section over the entire length, an operation section 115 located on the rear side of the insertion section 114, and a universal cord extending from the operation section 115. 116 and a connector (not shown).

The mouth portion 103 is a ring-shaped tip portion 1.
04 and the U-shaped portion 105, and when the endoscope 110 is set on the insertion portion cover 100, the U-shaped portion 105 and the operation portion 115 have the configuration shown in FIG. An opening 107 is provided on the rear end side of the U-shaped portion 105. The fluid tubes 81, 82, 83 are led out from the opening 107 and bound together with the universal cord 116 with the tape 108.

A soft cover 120 made of an elastic material such as rubber is coated so as to cover the mouth 103, the endoscope insertion opening 109 and the opening 107 of the U-shaped portion 105. The mouth part 103 and the soft cover 120 form a substantially tubular shape, and the operation part 115 is completely enclosed.

A rear end portion of the soft cover 120 is provided with an opening 121 whose diameter is reduced so that it can be expanded.
To universal cord 116 and fluid tube 81,
82 and 83 are derived. Also, the operation knobs 22b and 22d
Is detachable from the shafts 22a and 22c.
A hole 120a for a is provided in the soft cover 120. The other structure is similar to that of the first embodiment, and the same members are designated by the same reference numerals and the description thereof will be omitted. At this time, the tip forming portion 9
The structure of 1a is the same as the structure of the tip portion 91 of the first embodiment.

As described above, since the U-shaped portion of the mouth portion covers various fluid tubes, the tubes are not bent or bent when the operating portion is gripped.

Other functions and effects are similar to those of the above-mentioned embodiment.

The insert cover may be disposable, and at this time, various tubes may not be removable. Further, the sectional shape of the endoscope is not limited to the D shape. Furthermore, the soft cover provided on the mouth part may be set on the mouth part to be disposable.

Further, as shown in FIG. 10, the mouth portion is provided with the engaging portion 68 on the operating portion side as shown in FIG. 8, and the U-shaped portion 131 is provided with the protrusion 67 so as to be engaged. May be. The soft cover 120 is made of vinyl chloride.

By the way, the structure of the flexible tube 63 is not limited to that described above, but may be structured as shown in FIGS.

That is, as shown in FIG.
A second spiral tube 76a is provided outside the spiral tube 76 of a,
By using a so-called double spiral tube, the twisting force is further easily transmitted to the tip.

Further, as shown in FIG. 12, a third spiral tube 76 is provided outside the second spiral tube 76a of the flexible tube 63b.
By providing b and forming a so-called triple helix tube, the twisting force is further transmitted to the tip. [Additional Notes] 1. In an endoscope having a flexible insertion portion and a cover type endoscope having an insertion portion cover that covers at least the entire length of the insertion portion of the endoscope, a twisting force applied to the cover base end portion of the insertion portion cover. A cover-type endoscope characterized in that a twisting force transmitting means for transmitting the force to the tip of the cover is provided.

2. A cover-type endoscope that covers at least substantially the entire length of an insertion portion of an endoscope and has a reusable insertion portion cover that can be sterilized and / or sterilized.

3. The cover type endoscope according to appendix 1, wherein the twisting force transmitting means is a flexible tube portion of the insertion portion cover.

4. The cover type endoscope according to appendix 3, wherein the flexible tube portion has at least a spiral tube.

5. The cover type endoscope according to appendix 4, wherein the spiral tube is plural.

6. The cover-type endoscope according to appendix 4, wherein the spiral tube is double formed.

7. The cover type endoscope according to appendix 4, wherein the spiral tube is formed in three layers.

8. The cover type endoscope according to Supplementary Note 1 and Supplementary Note 3 to Supplementary Note 7, wherein the flexible tube portion has a knitting tube.

9. The cover type endoscope according to Supplementary Note 1 and Supplementary Notes 3 to 8, wherein the flexible tube portion has an outer cover.

10. The cover type endoscope according to appendix 1 and appendix 3 to 9, wherein at least a part of the insertion portion cover has a curved portion.

11. Note 1 in which the curved portion is made of an elastic body
The cover type endoscope described in 0.

12. The cover-type endoscope according to appendix 11, wherein the bending portion is formed of a joint piece.

13. 13. The cover-type endoscope according to appendix 12, wherein the bending portion is bent by a bending wire.

14. In the above-mentioned bending portion, the bending wire is pulled by an operation knob provided on the operation portion of the endoscope.
Cover system endoscope described.

15. 15. The cover-type endoscope as set forth in appendix 14, wherein the operation knob has one for up and down and one for left and right.

16. 15. The cover-type endoscope according to appendix 14, wherein the operation knob is for up and down only.

17. 15. The cover-type endoscope according to appendix 14, wherein the operation knob is for left and right only.

18. 18. The cover type endoscope according to appendices 1 to 17, wherein a watertight elastic tube is provided on the inner surface of the insertion portion cover.

19. 19. The cover type endoscope according to supplementary note 1 to supplementary note 18, wherein various fluid tubes are inserted into the cover of the insertion portion.

20. 20. The cover type endoscope according to appendix 19, wherein at least one of the fluid tubes is an air supply tube.

21. 21. The cover type endoscope according to appendices 19 and 20, wherein at least one of the fluid tubes is a water supply tube.

22. 22. The cover type endoscope according to appendix 19 to 21, wherein at least one of the fluid tubes is a suction tube.

23. 23. The cover type endoscope according to appendices 19 to 22, wherein the fluid tube is detachable from the insertion portion cover.

24. 24. The cover type endoscope according to appendix 19 to 23, wherein a fluid tube is arranged along the operating portion of the endoscope, and a hard operating portion cover for covering the fluid tube is provided.

25. 25. The cover type endoscope according to appendix 24, wherein a part of the operation portion cover is a soft member.

26. 26. The cover type endoscope according to appendices 24 and 25, wherein the operation portion cover is provided integrally with the insertion portion cover.

27. 27. The cover type endoscope according to appendices 24 to 26, wherein the operation portion cover is engageable with the operation portion of the endoscope.

28. Note 1 or Note 2 in which a disposable cover can be inserted into the reusable insert cover.
The cover-type endoscope described in 7.

29. A cover-type endoscope that covers at least substantially the entire length of the insertion portion of the endoscope and inserts a fluid tube arranged in parallel in the insertion portion, wherein the fluid tube is detachable from the insertion-portion cover. .

30. 30. The cover-type endoscope as set forth in appendix 29, wherein the fluid tube is detachable at a distal end constituent portion of the insertion portion cover.

31. 31. The cover type endoscope according to appendix 30, wherein the detachable portion of the fluid tube has a watertight structure.

32. 32. The cover-type endoscope according to appendix 31, wherein the watertight structure is an O-ring.

33. The attaching / detaching portion of the fluid tube is aligned with the fixing projection portion connected to the tip of the fluid tube and the switching projection portion provided at the distal end portion, and the fixing projection portion is inserted into the switching projection portion to attach the projection portion. The cover type endoscope according to appendix 30 to 32, which is rotated and brought into contact with the stopper portion for connection.

34. 34. The cover type endoscope according to supplementary note 32 and supplementary note 33, wherein an O-ring is disposed in a circumferential groove provided in a fixed cylinder having a fixing projection.

Note that the above Supplementary Notes 1 and 3 to Supplementary Note 1
7 and US Pat. No. 464 as US Pat.
As shown in 6722, a cover-type endoscope is disclosed. This had a cover on the outside of the insertion part of the endoscope. Therefore, the cover part is gripped and twisted by hand, but at this time, the cover and the insertion part slip, and only the cover is twisted, and the twisting force is not transmitted to the insertion part.
In order to prevent this, if the cover is gripped with a strong force so that the cover and the insertion portion come into close contact, the arm becomes very tired.

Further, as a conventional example for the above-mentioned Supplementary Notes 19 to 24 and Supplementary Note 28, there is a cover in which a fluid tube is provided along the outside of the insertion portion of the endoscope, but the twisting force is not transmitted or is strong. The fluid tube was broken by grasping the cover with force.

Further, as a conventional example for the above-mentioned appendixes 24 to 27, a cover-type endoscope is disclosed as shown in US Pat. No. 4,646,722. Since the operating portion is covered with the soft cover, the fluid tube was easy to fold when gripping the operating portion. Therefore, the applicant of the present invention is
JP-A No. 2003-242242 proposes that the operating portion cover is formed of a resin having a certain degree of rigidity, and the fluid tube is passed through the cover. However, when the cover lid is fixed to the cover body, the protrusion has to be inserted into the fixing hole, which makes setting work troublesome.

Further, the above Supplementary Note 2 and Supplementary Note 19 to Supplementary Note 2
As a conventional example for No. 3 and Supplementary Note 29 to Supplementary Note 34, a cover-type endoscope is disclosed as shown in USP 4646722. Since the cover is discarded for each case, running cost is required.

Therefore, the purpose of the above-mentioned Supplementary Notes 1 and 3 to Supplementary Note 17 and Supplementary Note 28 is to provide a cover type endoscope having a good twisting operability.

Further, an object of Supplements 19 to 24 and Supplement 28 is to provide a cover type endoscope which does not break the fluid tube during the twisting operation.

Further, an object of the above-mentioned supplementary notes 24 to 27 is to provide a cover type endoscope in which the fluid tube is not broken when grasping the operating portion.

[0100] Further, an object of Supplements 26 and 27 is to provide a cover-type endoscope in which the fluid tube is not broken when the operating portion is gripped and the operating portion cover is easily attached.

Further, the object of the above-mentioned Supplementary Notes 2 and Supplementary Notes 19 to 23 and Supplementary Notes 29 to 34 is to provide a hygienic cover type endoscope which requires no running cost.

[0102]

As described above, according to the cover-type endoscope of the present invention, the cover-type endoscope having the endoscope cover which has good twisting operability, good mounting workability, and reduces the cost burden. A mirror can be provided.

[Brief description of drawings]

1 to 8 relate to an embodiment of the present invention, and FIG. 1 is a diagram showing a schematic configuration of a cover type endoscope system.

FIG. 2 is a view showing a cover endoscope equipped with a disposable cover.

FIG. 3 is a diagram illustrating connection of a nozzle to a tip portion.

FIG. 4 is a view showing a suction fixed tube and a suction tube.

FIG. 5 is a sectional view of a curved portion of the insertion portion cover.

FIG. 6 is a sectional view of a flexible tube portion of an insertion portion cover.

FIG. 7 is a diagram showing a schematic configuration of an operation unit of a cover-type endoscope.

FIG. 8 is a cross-sectional view showing an outline of an operation unit cover.

FIG. 9 is a diagram showing a schematic configuration of a cover-type endoscope having another configuration.

FIG. 10 is a diagram showing another configuration of the operation unit cover.

FIG. 11 is a cross-sectional view showing another configuration of the flexible tube portion.

FIG. 12 is a cross-sectional view showing another configuration of the flexible tube portion.

[Explanation of symbols]

 2 ... Cover type endoscope 5 ... Endoscope 6 ... Insertion section cover 92 ... Cover section

Claims (1)

[Claims] 1. A cover-type endoscope having an endoscope having a flexible insertion portion and an insertion portion cover that covers at least the entire length of the insertion portion of the endoscope, wherein the insertion portion cover is provided with the insertion portion cover. A cover-type endoscope characterized in that a twisting force transmitting means for transmitting a twisting force applied to the base end portion of the partial cover to the distal end portion of the insertion portion cover is provided.