JPH08540A - Cover type endoscope - Google Patents

Abstract

PURPOSE:To provide a cover type endoscope which is arranged with plural pipelines inserted into an insertion part cover in a way so as to be easily gripped by an operator and does not require formation of a gripping part to a larger diameter. CONSTITUTION:A mouth body part 9 of the insertion part cover 2 is composed of a branching part 20 having a treatment means-insertion part 14 on a front end side and the gripping part 21 formed of a rigid resin so as to exist on the rear side of this branching part 20. A suction tube 16, air feed tube 18 and water feed tube 19 extending from the mouth body part 9 are disposed along tube grooves 36 disposed on side end faces of a switching part 25 and a universal code 35 and extend to the operator side. The entire part of an operating part 8 is covered by an operating part cover 22. On the other hand, the suction tube 16, air feed tube 18, water feed tube 19 and a universal code extending to the operator side are covered as well by this cover.

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, it has been washed and sterilized in order to prevent the endoscope from causing an infectious disease. However, it takes a considerable amount of time to surely wash the endoscope that has been used once, which reduces the efficiency of use of the endoscope and is a troublesome work for the operator.

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 an endoscope cover and a cover endoscope to which the endoscope cover is attached and used. The cover endoscope is sterilized in advance. The endoscope is covered with a sterilized endoscope cover, and the cover endoscope covered with the endoscope cover is inserted into a body cavity of a patient for inspection and treatment.

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 for reuse. This makes it possible to use the cover endoscope continuously without cleaning or disinfecting.

As an endoscope having such a structure, for example, in Japanese Patent Publication No. 3-60486, a channel connected to a suction operation valve for sucking body fluid in a body cavity and an air / water supply operation valve while the endoscope is being used. By inserting a channel for air supply and water supply that is connected to the guide tube into the guide tube, the part that comes into contact with filth in the body cavity of the patient or the inner wall of the body cavity is made disposable after each use. An endoscope with a sheath is disclosed.

In the endoscope having the treatment instrument raising base at the distal end thereof and having the bending portion, the treatment instrument raising base operating means and the bending operation means are installed separately from each other. However, there is a problem in that the operation portion becomes thicker and the operability is impaired. Therefore, in order to deal with this problem, in Japanese Patent Publication No. 2-43488, a guide member is provided in the middle of the bending wire of the bending operation means provided in the operation portion, and the operation wire connecting member of the treatment instrument raising base is attached to this guide member. There is disclosed an endoscope in which the dead space is effectively used to make the operating portion thin and the operability that is easy to grasp is improved by being provided so as to be movable back and forth.

[0008]

However, in the endoscope with a sheath disclosed in Japanese Patent Publication No. 3-60486, there is no means for fixing the connecting means between the channel and the conduit to the outer peripheral surface of the operating portion. So the suction line, the air supply line,
In addition, since it is not decided where to place and extend the channel tube that forms the water supply pipe or the like in the operation part, the diameter becomes large depending on the position of the tube and it becomes difficult to hold the tube. Since there is a risk that the fluid will not flow by pressing the button, there is a problem in that the operability changes significantly depending on the position where the tube is arranged.

The endoscope disclosed in Japanese Examined Patent Publication (Kokoku) No. 2-43488 is effective for an endoscope that is inserted into a body cavity without a cover, but is a cover-type endoscope in which an endoscope cover is mounted. Then, it is simpler and cheaper to provide the treatment instrument raising base and the treatment instrument raising wire on the endoscope cover side. Therefore, even if the treatment tool raising wire coupling member and the guide member are provided outside the operation portion, the thickness of the operation portion changes because the bending operation means remains in the operation portion of the cover endoscope. Instead, by disposing the treatment instrument raising wire coupling member and the guide member outside the operation portion, the gripped portion has a large diameter and the operability is impaired.

The present invention has been made in view of the above circumstances, and arranges a plurality of conduits inserted through the insertion portion cover so that the operator can easily grasp them, and does not make the grasped portion have a large diameter. It is an object of the present invention to provide a cover-type endoscope with good operability.

[0011]

A cover-type endoscope according to the present invention has internal pipe passages, and these insertion pipes extend from a grip portion located on the hand side, and What is claimed is: 1. A cover-type endoscope comprising: an insertion section to which an insertion section cover is attached; and a cover endoscope having an operation section located on the proximal side of the insertion section, the extension endoscope extending from a grip section of the insertion section cover. Since the conduits to be arranged are arranged along the outline of the grip portion and the operating portion, the plurality of conduits do not interfere when gripping the operating portion, and the workability is good.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 4 relate to a first embodiment of the present invention, FIG. 1 is a view showing a schematic configuration of a cover-type endoscope, and FIG. 2 is a view taken in the direction of arrow A of FIG. FIG. 3 is an explanatory view of a cover-type endoscope operation section including a partial cross section of the section, FIG. 3 is a perspective view of the cover endoscope operation section, and FIG. 4 is each provided between the mouth section and the operation section. It is a figure which shows the arrangement position of a tube.

As shown in FIG. 1, the cover-type endoscope 1 is composed of an insertion portion cover 2 and a cover endoscope 3 attached to the insertion portion cover 2.

The insertion portion cover 2 has a distal end cover 6 on which an optically transparent lens cover 4 and a treatment instrument raising base (hereinafter abbreviated as a raising base) 5 are arranged, and one end of the distal end cover 6 is fixed to the proximal side. Flexible flexible outer tube cover 7
And a mouth body portion 9 that can be fixed to an operation portion 8 of the cover endoscope 3 provided at the other end of the outer cover 7, which will be described later.

In the channel opening 10 for accommodating the raising base 5 of the tip cover 6, a tip of a forceps tube 11 inserted through the insertion portion cover 2 and a raising wire 12 connected to the tip of the raising base 5 are provided. Tube for wire insertion 1
The tip of 3 is open.

As shown in FIG. 2, the forceps tube 11 extends to the mouth portion 9 on the proximal side and is branched into two. One of the branches is used as a forceps tube 11 and is a treatment instrument insertion portion 14
To the forceps plug 15 having a slit into which a treatment tool (not shown) can be inserted. And
The other branch is further extended to the hand side as a suction tube 16. Further, an air supply tube 18 and a water supply tube 19 which communicate with the nozzle 17 provided near the lens cover 4 shown in FIG. 1 also extend to the hand side through the mouth section 9.

As shown in FIG. 2, the mouth part 9 is provided with a branch part 20 having a treatment tool insertion part 14 located on the distal end side and a branch part 20 located on the rear side of the branch part 20 so that the operator can grasp it. The grip portion 21 is made of a relatively hard resin such as modified polyphenylene oxide. And
On the near side of the grip portion 21, there is integrally provided an operation portion cover 22 shown by a broken line, which is made of polyethylene, vinyl chloride, latex, polyurethane, etc. in a thin cylindrical shape.

The operating portion cover 22 is long and has a length of about 30 cm to 1.5 m and covers the entire operating portion 8 and extends toward the operator's side by a suction tube 16, an air feeding tube 18,
The water supply tube 19 and a universal cord described later are covered.

As shown in FIGS. 1 and 2, the cover endoscope 3 has an elongated insertion portion 23 extending from the distal end side of the operating portion 8. The distal end portion of the insertion portion 23 is arranged on the distal end cover 6. An illumination optical system and an observation optical system (not shown) are provided so as to face the provided lens cover 4.

The operation portion 8 of the cover endoscope has a stepped portion 24 with which the grip portion 21 of the endoscope cover mouth portion 9 abuts.
And a switch section 25 provided on the hand side of the stepped section 24. The switch section 25 includes an air / water supply switch 26, a suction switch 27, and image switches 28 and 29.
And a vertical bending knob 30 for bending the insertion portion 23 in the vertical direction with respect to the observed image, a horizontal bending knob 31 for bending the horizontal direction, a vertical engagement lever 32 for holding the vertical bending state, and a horizontal bending state. The right and left engagement levers 33 for holding, and the raising knob 34 for adjusting the raising angle of the raising table 5 are arranged.

Further, various switches 2 are operated from the operation section 8.
6, 27, 28, 29 are connected to a signal line, a light guide fiber for supplying illumination light, an image transmission cable for transmitting an image from an observation lens, and the like. A suction tube 16, an air supply tube 18, and a water supply tube 19 extending from the portion 9 are arranged along a tube groove 36 formed on a side end surface of the switch portion 25 and the universal cord 35.

The positional relationship of the operating portion 8 configured as described above will be described from the direction of arrow B shown in FIG. When the central axis of the insertion portion 23 of the cover endoscope 3 is set as the central position,
The protruding direction of the air / water switch 26 is the 0 o'clock direction,
The opening of the treatment instrument insertion portion 14 opens toward the hand side within the range of the 0:00 to 3 o'clock direction. Also, the vertical bending knob 30
The left and right curving knobs 31 are arranged in the 3 o'clock direction. Furthermore, a forceps tube 11, a suction tube 16, an air supply tube 18, and a water supply tube 19 which are extended to the mouth part 9.
Are arranged in the branching section 20 in the 0:00 to 2:00 direction,
In the vicinity of the switch portion 25, they are arranged in the 9 o'clock to 11 o'clock direction. That is, the positions of the tubes 16, 18, and 19 are changed while extending from the branch portion 20 to the switch portion 25.

That is, as shown in FIG. 3, the positions of the suction tube 16, the air supply tube 18 and the water supply tube 19 in the operating section 8 are located on the tip side of the operating section 8 in the 0:00 to 2 o'clock direction. Where each tube 16,1
8 and 19 are gradually bent in the direction from 9 o'clock to 11 o'clock to be along the tube groove 36 formed in the operation portion 8 and finally 9 o'clock to 9 o'clock.
It extends in the 11 o'clock direction and is covered with the grip portion 21 of the mouth body portion 9.

This state is shown in FIGS. 4 (a), 4 (b) and 4 (c), which are sectional views CC, DD and EE in FIG.
As shown in the figure, since the depth of the tube groove 36 is formed so as to gradually increase from the tip side toward the hand side as shown in the figure, the tube groove 36 is arranged in the 0:00 to 2:00 direction in the branch portion 20. The respective tubes 16, 18, and 19 that have been formed gradually change their positions, and are gradually accommodated in the tube groove 36 to be extended in the 9 o'clock to 11 o'clock direction of the operating portion 8.

At this time, as shown in FIGS. 4A, 4B, and 4C, the raising wire 12 has the grip portion 21.
It is introduced into the tip cover 6 through the wire hole 38 provided in the.

In addition, the surface of the lens cover 4 is viewed from the front side of the lens cover 4, the downward direction of the image displayed on the monitor (not shown), the distal end side of the lens cover 4, and the rightward direction from the mouth portion 9 side. It is on the right side when

Further, the tube groove 36 is formed by bending along the connecting portion 37 of the universal cord 35, and is formed along the universal cord 35 as it is.

The operation of the cover-type endoscope 1 configured as described above will be described. First, the insert cover 2 is attached to the cover endoscope 3. Then, when the grip portion 21 of the mouth body portion 9 of the insertion portion cover 2 is pushed in toward the stepped portion 24, each tube such as the suction tube 16, the air supply tube 18, and the water supply tube 19 is aligned with the tube groove 36. And the universal cord 35, and extends to the hand side.
At this time, the universal cord 35, the suction tube 16, the air supply tube 18, and the water supply tube 19 are put together with a tape or the like.

Next, the switch section 25 is covered with the operation section cover 22 which is integrally provided on the near side of the grip section 21 and the universal cord 3 is put together.
5, the suction tube 16, the air supply tube 18 and the water supply tube 19 are covered.

In this state, the operator holds the grip portion 2 with his left hand.
1 is grasped and the insertion portion cover 2 is held by the right hand to insert / withdraw the cover-type endoscope 1 into / from the body cavity. Further, a treatment tool for performing treatment or treatment is operated by the right hand, and is inserted / removed into / from the forceps tube 11 via the forceps plug 15.

As described above, the grip portion of the mouth body is formed of a relatively hard resin, and each tube such as a suction tube, an air feeding tube, and a water feeding tube is tipped in the gap between the grip portion and the operating portion. By arranging the tubes along the tube groove formed so as to become gradually deeper from the side toward the proximal side and extending toward the proximal side, the respective tubes can be arranged at the same position at all times. Therefore, the operator can smoothly perform the endoscopic examination without grasping the position of the tube when grasping the operation portion.

Further, while each tube is guided along the tube groove to a predetermined position, the tubes can be arranged between the grip portion made of a hard resin and the operating portion. It can be gripped very easily without crushing the size of the grip and without enlarging the size of the grip, so that good suction, air supply and water supply operations can always be performed.

Further, even when the grip portion is made of a thin and flexible material like the operation portion cover, each tube can be housed in the tube groove, so that the tube is crushed by the operator's gripping force. Therefore, good suction, air supply, and water supply are possible.

Further, since each tube is arranged along the universal cord and is integrated with the universal cord, and the operation portion cover is covered on the outer side thereof, these plural tubes and cords can be treated as one cord. Because it can be done, it is easier to use.

Furthermore, since the opening of the treatment instrument insertion portion is positioned in the direction from 0 o'clock to 3 o'clock, the treatment instrument held in the right hand can be easily inserted and removed.

In the first embodiment, the forceps tube 11, the air supply tube 18, the water supply tube 19 and the like are arranged on the right side of the insertion section 23 in the outer cover 7 when the distal end side is viewed from the operation section 8. As shown in FIG. 5, a cover type endoscope 1a for the upper digestive tract of a direct view type is provided with a lens cover 4 on the distal end surface of the distal end cover 6a of the insertion section cover 2, and a forceps tube near the lens cover 4. The opening 11 may be provided, and the forceps tube 11, the air supply tube 18, and the water supply tube 19 may be arranged on the left side of the insertion portion 23. At this time, even if the forceps channel, the air supply tube, and the water supply tube are arranged in a positional relationship opposite to that shown in FIG. 1, by disposing the treatment instrument insertion portion in exactly the same manner as in FIG. The arrangement positions of the suction tube, the air supply tube, and the water supply tube in FIG.
The positional relationship can be exactly the same as that of (a), (b) and (c). With this, even if the type of the insertion section cover is changed, the arrangement position of the treatment instrument insertion section and the suction tube, the air supply tube, and the water supply tube can be always the same, so that the operator can use any type of cover-type cover. It is possible to operate the endoscope by grasping the grip portion in exactly the same manner.

Further, since the central axis of the wire hole 38 in the grip portion 21 shown in FIG. 4 is provided substantially parallel to the central axis of the insertion section cover 2, the wire hole 38 is inserted as shown in FIG. A rack 40 is provided at one end of the raising wire 12 that is extended. This rack 40
Engages with a pinion 41 provided at one end of the raising knob 34. Before the treatment tool is raised (when it is inverted), the pinion 41 and the rack 40 are not engaged with each other, but the pinion 41 and the rack 40 are engaged with each other only when the raising knob 34 is rotated. Is towed.
In this way, by making the center axis of the wire hole and the center axis of the insertion section cover substantially parallel, the amount of engagement with the pinion does not change even when the rack advances or retracts in the axial direction, so the rack does not come off the pinion. Since the gears do not become out of mesh with each other, the raising operation can always be performed smoothly.

Further, as shown in FIGS. 7 to 12, the operation section cover 22 may be provided separately from the mouth section 9, and the insertion section cover 2b may be provided.

That is, FIG. 7 shows a direct-view type insertion section cover 2b in which the operation section cover 22 is not integrally provided in the mouth section 9, and the lens cover 4 is provided on the tip surface of the tip cover 6b. A forceps tube 11, an air supply tube 18, and a water supply tube 19 are extended from the portion 9, respectively.

The cover endoscope 3b shown in FIGS. 8 and 9.
Is covered with the insertion section cover 2b, and the illumination optical system 4 opposite to the lens cover 4 when the insertion section cover 2 is attached to the front end surface of the cover endoscope 3b.
2. The observation optical system 43 is provided, and the conduit lumen 44 that allows the forceps tube 11, the air supply tube 18, and the water supply tube 19 to be inserted and is open to the operation unit 8 is provided. Note that reference numeral 45 is a conduit groove described later. As shown in FIG. 10, the operation portion 8 is provided with a conduit groove 45 in which the conduit lumen 44 is opened.

Then, as shown in FIGS. 11 and 12, the insertion portion cover 2b is attached to the cover endoscope 3b, and the forceps tube 11, the air supply tube 18, and the water supply tube 19 are attached.
Is extended to the outside from the conduit groove 45, and a separate operation portion cover 22b is attached. The operation portion cover 22 is made of a hard branch cover 20 that is hard to be fitted into the conduit groove 45 and a soft grip cover 46. The branch portion 20 communicates the inner side and the outer side, and protrudes inward. A channel connection portion 47 connectable to the forceps tube 11 and a suction connection portion 48 connectable to the suction tube 16 are provided. The outer opening of the channel connection portion 47 is the treatment instrument insertion portion 14.

As described above, the insert cover and the operation cover are separately formed, and the insert cover, the cover endoscope, and the operation cover are combined with each other, whereby the conventional cover is provided. A forceps channel, an air supply tube, and a water supply tube can be built in the insertion portion like the endoscope without the device. As a result, even a cover-type endoscope can obtain substantially the same flexibility as the insertion portion of an endoscope without a cover, so that the twisting force on the proximal side when the cover-type endoscope is inserted Can be easily transmitted to the tip, and the insertion portion can be smoothly inserted into the body cavity.

The conduits built in the insertion portion may be three, that is, a forceps channel, an air supply tube and a water supply tube, or may be two or only one.

FIG. 13 is a view showing the schematic arrangement of a cover type endoscope operation section according to the second embodiment of the present invention. As shown in the drawing, in the present embodiment, when the distal end side direction is viewed from the operation portion 8 and the central axis of the insertion portion 23 is the center, when the protruding direction of the air / water feeding switch 26 is the 0 o'clock direction, Forceps tube 11 and air supply tube 1 arranged in the 3 o'clock direction
8. The water supply tube 19 is bent in the 0:00 direction at the proximal end of the insertion portion 23. Then, one of the branched forceps tubes 11 is the treatment instrument channel tube 14 of FIG. 1, and the other extends as a suction tube 16 together with the air supply tube 18 and the water supply tube 19 to the proximal side.

The suction tube 16 and the air supply tube 18
The water supply tube 19 is a tubular suction joint 49, an air supply joint 50, and a water supply joint which are formed by bending a relatively hard resin such as polypropylene, polyethylene, or hard vinyl chloride on the distal end side of the operating portion 8 in a crank shape. It is connected to one end of 51. And, each of these joints 49, 50,
The other end of 51 is opened in the vicinity of the tube groove 36 formed in the 9 o'clock to 11 o'clock direction, and the suction tube 16 and the air supply tube 1 are provided at the other ends of the joints 49, 50, 51, respectively.
8. The water supply tube 19 is connected and extended to the universal cord 35 side. The other structure is the same as that of the first embodiment, the same members are designated by the same reference numerals, and the description thereof will be omitted.

As described above, the suction tube, the air supply tube, the tubular suction joint, the air supply joint, and the water supply joint made of polypropylene, polyethylene, or hard vinyl chloride are used.
Since the water supply tube changes its direction from 3 o'clock to 9 o'clock to 11 o'clock, it extends so that each tube smoothly grips when covering the grip part of the insertion part cover with the cover endoscope. It is housed in the tube groove between the control section and the operation section.

Further, the suction tube, the air supply tube, and the water supply tube may be extended in a desired direction by a suction joint, an air supply joint, and a water supply joint formed by bending a hard resin material in a crank shape. Since it is possible to construct a cover type endoscope without worrying about the minimum bending radius of each tube, that is, without buckling the tube, the suction, air supply, and water supply functions are always good. .

Further, since the suction joint, the air supply joint, and the water supply joint are formed by bending, each tube can be accommodated in the tube groove at a short distance, so that the length of the grip portion can be shortened. Therefore, the weight of the operation unit can be reduced. Other functions and effects are the same as those of the above-described embodiment.

As shown in FIG. 14, the forceps tube 11, the suction tube 16, the air supply tube 18 and the water supply tube 19 are exactly the same as those in FIG. 13 in the direct view type cover endoscope 1a shown in FIG. Therefore, even if the type of the insertion portion cover 2 changes, the operator can always perform a good operation without being confused.

Further, the suction joint 49, the air supply joint 50, and the water supply joint 51 shown in FIGS. 13 and 14 are made of polypropylene,
Instead of forming with a relatively hard resin member such as polyethylene or hard vinyl chloride, for example, a tube made of polytetrafluoroethylene, a tube made by coating fluororubber on porous polytetrafluoroethylene, inside or outside the porous polytetrafluoroethylene layer A relatively flexible tube such as a tube provided with a polytetrafluoroethylene layer may be used.

As a result, even if the joint portion is clogged with dirt or the like, it is possible to insert a small-diameter brush and clean the inner surface of the tube. The inner surface of the tube can be cleaned by deforming the tube by the pushing force of. Other functions and effects are similar to those of the second embodiment.

FIG. 15 is a perspective view showing the schematic construction of the operating portion according to the third embodiment of the present invention. As shown in the figure, in the present embodiment, each of the suction tube 16, the air supply tube 18, and the water supply tube 19 extends from the distal end side of the operation portion 8 along a tube groove 36 formed on the proximal side. Here, when the tip end side is seen from the hand side of the switch part 25, and the protruding direction of the air / water supply switch 26 is the 0 o'clock direction around the central axis of the insertion part 23, the branch part 2
In 0, the suction tube 16, the air supply tube 18, and the water supply tube 19 are arranged at the positions in the 0 o'clock to 2 o'clock direction, and in the switch part 25, they are smoothly turned in the 9 o'clock to 11 o'clock direction. Has been done. That is, since the tube groove 36 in which the tubes 16, 18 and 19 are arranged is wide on the distal end side of the operation portion 8 and gradually narrows toward the proximal side, the tubes 16 and 1 are formed.
The arrangement position is gradually changed on the operation portion without sharply bending 8 and 19. Other configurations are the same as those of the above-described embodiment, and the same members are designated by the same reference numerals and the description thereof is omitted.

As described above, when the insertion section cover is attached to the cover endoscope, the tubes move from the 0:00 to 2:00 direction on the distal end side to the 9:00 to 11:00 direction as they move toward the operator's side. As it is reasonably possible, the arrangement position is smoothly changed and the extension is performed, so that a brush or the like can be inserted.

Further, since stress due to deformation such as buckling hardly acts on each tube, the insertion section cover can be constructed with an inexpensive tube having relatively low rigidity, so that a disposable endoscope cover can be used. There is also an effect that it can be formed at low cost. Other actions and effects are similar to those of the above-described embodiment.

Another configuration of the operation portion cover will be described with reference to FIGS. As shown in FIG. 16, the operation unit cover 22 includes polyethylene, vinyl chloride, latex,
Cover body 55 made of polyurethane or the like in a thin-walled tubular shape
And a knob cover 56 joined to the cover body 55.

As shown in FIGS. 16 and 18, there are five finger hooks 56, 56, 5 on the outer peripheral surface of the knob cover 56.
6. ． ． The upper and lower knob fitting portions 57 and the left and right knob fitting portions 58 are provided on the inner surface. Upper and lower knob fitting part 57
Are formed in a convex shape so that they can be fitted to the fitting surface 59 on the side surface of the vertical bending knob 30, the left and right knob fitting portions 58 are located inside the vertical knob fitting portion 57, and the attachment / detachment opening portion is formed. 58a
A plurality of concave shapes are provided in parallel with the. The left and right knob fitting portion 58 is slidable in the axial direction of the knob shaft 60 with respect to the slide surface 31 a on the side surface of the left and right curved knob 31, and is engageable in the circumferential direction of the knob shaft 60. ing.

The vertical bending knob 30 has a vertical knob fitting portion 57.
The fitting surface 59 is the outermost circumference and has a small diameter portion 61 having an outer diameter smaller than the inner diameter of the attachment / detachment opening 58a of the knob cover 56. Further, the interval between the up-down bending knob 30 and the left-right bending knob 31 is set smaller than the length of the left-right knob fitting portion 58.

When the operating section cover 22 is put on the operating section 8,
First, the knob cover 56 is attached from the outside of the vertical engagement switch 33. Then, the left and right knob fitting portion 58 is slid on the slide surface 59 to fit the fitting surface 59 of the up / down bending knob 30 and the up / down knob fitting portion 57, and the mounting is completed.

At this time, in the case of bending in the up-down direction, the finger-hanging portion 56 is rotated while the up-down bending knob 30 is still fitted to the knob cover 56. Next, when performing the bending in the left-right direction, as shown in FIG.
As shown in, the knob cover 56 is moved along the knob shaft 60 in the direction of the left-right bending knob 31 (upward in the drawing). Then, the left and right knob fitting portions 58 and the sliding surface 31a are fitted to each other, and the knob cover 56 is rotated, whereby the left and right curves can be bent.

Since the knob cover is slidable in the direction of the knob shaft with respect to the left and right curving knobs, the knob cover easily reaches the vertical curving knob and is very easy to mount. If you pull the knob cover on, the sliding surface of the left and right curving knobs will slide off and you will be able to remove the operating section cover by removing the cover body, which will make the work easier, and also the up and down curving knobs, the left and right curving knobs, and the operation knobs. There is no need to worry about the parts being contaminated with dirt attached to the outside of the operation cover.

Further, since the knob cover can be moved to the left and right bending knob side and the up and down bending knob side and the left and right bending knob and the up and down bending knob can be rotated by the knob cover, the operability of the bending knob is improved.

Another configuration of the operation portion cover will be described with reference to FIGS. 19 to 21. As shown in FIGS. 19 to 21, the operation portion cover 22 is formed of polyethylene, vinyl chloride, latex, polyurethane, or the like into a thin tubular shape, and the knob opening portion 62 is provided to remove the bending operation knob. The cover main body 55 covers the universal cord 35 and the knob cover 56 covers the bending operation knob. The knob cover 56 is fitted with a vertical knob cover 63 that fits and covers the outer circumference of the vertical bending knob 30 from the operation unit 8 side, a left and right knob cover 64 that fits and covers the outer circumference of the horizontal bending knob 31, and a left and right engagement switch 33. It is composed of a switch cover 65 which covers together.

The left / right knob cover 64 has a left / right rotating portion 66 rotatably overlapping the up / down knob cover 63, and the switch cover 65 is a switch rotatably overlapping with the left / right knob cover 64. It has a rotating part 67.

Further, on the inner peripheral surface of the up / down knob cover 63, silicone rubber or neoprene rubber or the like engageable with the free groove 68 and the engagement groove 69 provided as the sliding portion switching means provided on the outer peripheral portion of the up / down bending knob 30. The elastic convex portion 70 formed in 1. is provided.

At the end of the up / down knob cover 63 on the side of the operating portion 8, a sliding member 71 formed of a rubber member such as silicon rubber or neoprene rubber, which serves as a pressing and holding means for the sliding portion, is provided.
Is provided.

Further, the free groove 68 and the engagement groove 6
The distance from 9 is less than or equal to the distance d between the up / down knob cover 63 and the left / right knob cover 64 in the left / right rotating portion 66.

Further, as shown in FIG. 21, five finger hooks 63a are formed on the outer peripheral surface of the upper and lower knob covers 63, and four finger hooks 64a are formed on the outer peripheral surface of the left and right knob covers 64. The cover 65 has an upper portion formed with a rectangle 65a that fits into the left and right engagement switches 33, and a lower portion (switch rotating portion 67) formed with a circle 65b.

However, the left and right rotating portion 66 is circular. Further, when the elastic convex portion 70 is engaged with the free groove 68, the sliding body 71 is set to slightly touch the surface of the operation portion 8.

The operation of the endoscope cover configured as described above will be described. First, cover the operation unit 8 with the cover body 55,
The vertical bending knob 30 and the like are exposed from the knob opening 62. Next, the up / down knob cover 63 and the left / right knob cover 6
4. Knob cover 5 with switch cover 65 formed integrally
6 covers the up-down bending knob 30, the left-right bending knob 31, and the left-right engagement switch 33. At this time, the elastic protrusion 70
Are engaged with the free groove 68. In this state, the knob cover 63 for up and down, the knob cover 64 for left and right, the switch cover 65
By rotating each of them, up-down bending, left-right bending, left-right bending holding, and the like can be performed. In order to hold the bending in the vertical direction, the knob cover 63 for up and down is pushed toward the operation portion 8 as shown in FIG.
0 is engaged with the engagement groove 69. By this operation, the rubber slide body 71 is pressed against the operation portion 8, a frictional force is generated, and the up / down knob cover 63 cannot rotate.
It is possible to hold the curve in the vertical direction.

When removing the knob cover 56, the upper and lower knob covers 63 can be easily removed by pulling them up in the direction of the left and right knob covers 64.

As described above, since the knob cover can be attached / detached only by two actions of pushing and pulling, the attachment / detachment is easy, and the surface of the operating portion is attached to the outside of the knob cover more easily than the cover requiring two or more actions for attachment / detachment. It is possible to minimize the possibility of contamination with dirty waste.

Further, since the up-down curved engagement mechanism is provided on the knob cover, it is not necessary to provide it on the operating portion side, the structure is simplified, and the operation can be easily performed from the outside of the knob cover.

As shown in FIG. 22, the knob cover 56 is made of polyethylene, vinyl chloride, latex, polyurethane, etc., and has a single attachment / detachment opening 58a larger than the vertical bending knob 30. 30,
The left and right curving knob 31, the upper and lower engagement lever 32, and the left and right engagement switch 33 may be integrally covered.

At this time, as shown in FIG. 23, the thread 72 is attached to the attachment / detachment opening 58a on the outside / inside / outside. ． ． And pass through alternately. By forming the knob cover 56 in this way, the thread 7 is covered after the up-and-down bending knob 30 is integrally covered.
By pulling by holding both ends of 2, the attachment / detachment opening 58a can be narrowed as shown in FIG. 24, and the attachment can be easily completed.

When removing the knob cover 56, pulling only one end of the thread 72 causes the thread to come off and the knob cover 56 can be easily removed.

As shown in FIG. 25, the knob cover 56
May be configured by two bodies, that is, the knob cover 63 for up and down and the knob cover 64 for left and right, and the thread 72 may be formed in the attachment / detachment opening. Further, as shown in FIG. 26, the attachment / detachment opening 58a is formed.
The two threads 72A and 72B are provided on the outer side, the inner side, and the outer side of the knob cover 56. ． ． Alternatively, the two ends may be joined together to form two rings. In this case, the attachment / detachment opening 58a is easily narrowed by gripping the two wheels separately and pulling both sides in the direction of the arrow in the figure. By the way, reducing the diameter of the gripping portion makes it easier for a person with a small palm to operate, so there has been a demand for reducing the diameter of the gripping portion.

As shown in FIG. 27, a curved wire slide portion 73 is provided at the center inside the operating portion 8. In the bending wire slide portion 73, one end of each of the bending wires 74 and 75 is coupled to both ends of the chain 76, and the other end of each of the bending wires 74 and 75 is a joint provided at the tip of the bending portion (not shown). It is connected to the piece. The chain 76 is engaged with a sprocket 77 fixed to the knob shaft 60.

As shown in FIG. 28, a gap 78 that is slightly narrower than the gap between the bending wires 74 and 75 is provided at the center of the bending wire slide portion 73, and the bending wire slide portion 73 is at the proximal end of the gap 78. A cord hole 79 is provided so as to penetrate through and communicate with the inside of the universal cord 35. Further, a light guide fiber 80 for transmitting illumination light and an image transmission cable 81 for transmitting an observation image are arranged in the gap 78, and are inserted into the universal cord 35 through a cord hole 79.

As described above, by inserting the light guide fiber and the image transfer cable into the universal cord through the gap and the cord hole, the treatment instrument raising base of the endoscope to be inserted into the body cavity without the conventional cover. The outer shape of the operating portion can be reduced by effectively utilizing the portion accommodating the operating wire coupling member.

Further, since the wire for accommodating the raising wire is provided in the operation portion, a part of the wire protrudes, but the size of the operation portion is reduced as a whole.

In the above embodiment, a so-called electronic endoscope in which an observation image is transmitted by a cable is described, but it goes without saying that an endoscope using an image guide fiber may be used. Absent.

[Additional Notes] 1. It has a plurality of pipelines inside, and these pipelines are provided on the insertion section cover extending from the grip section located on the proximal side, the insertion section inserted into the insertion section cover, and the proximal side of the insertion section. A cover-type endoscope including a cover endoscope having an operating portion, in which a conduit extending from the grip portion of the insertion portion cover is arranged along the outline of the grip portion and the operating portion. Type endoscope.

2. The cover type endoscope according to appendix 1, wherein the conduit is a treatment instrument insertion channel and a suction channel branched from the treatment instrument insertion channel.

3. The cover type endoscope according to appendix 1, wherein the conduit is an air supply conduit.

4. The cover type endoscope according to appendix 1, wherein the conduit is a water supply conduit.

5. 2. The cover-type endoscope according to appendix 1, wherein the plurality of conduits are arranged at different positions at the tip of the grip and the side near the grip.

6. 2. The cover-type endoscope according to appendix 1, wherein the plurality of conduits are arranged in a tube groove formed in the operation portion.

7. 6. The cover-type endoscope according to appendix 5, wherein the plurality of conduits are arranged in the vicinity of the distal end portion of the grip portion and the treatment instrument insertion portion.

8. The opening of the treatment instrument insertion portion is located in the range between the protruding direction of the switch that controls the flow of the fluid in the conduit and the protruding direction of the insertion portion bending operation knob when the distal end side is seen from the operation portion. The cover-type endoscope described in appendix 7.

9. 6. The cover-type endoscope according to appendix 5, wherein the plurality of conduits are arranged at positions facing the arrangement portion of the insertion portion bending operation knob when the distal end side is seen from the operation portion in the grip portion proximal side portion.

10. The cover endoscope according to appendix 5, wherein the plurality of conduits are connected by a bent conduit.

11. 2. The cover-type endoscope according to appendix 1, wherein the plurality of conduits are extended along a universal cord that extends from the operation unit together with the cover endoscope built-in items.

12. 12. The cover-type endoscope according to appendix 11, wherein one of the built-in endoscopes for a cover is a light guide fiber.

13. 12. The cover type endoscope according to appendix 11, wherein one of the built-in endoscopes for a cover is an observation image transmission cable.

14. 12. The cover type endoscope according to appendix 11, wherein one of the built-in endoscopes for a cover is an image guide fiber.

15. An endoscope for a cover including an insertion section cover, an insertion section to be inserted into the insertion section cover, and an operation section located on the hand side of the insertion section and having a bending operation knob, and an operation for covering the operation section. A cover-type endoscope including a section cover, wherein the operation section cover is provided with a knob cover that can be fitted into the bending operation knob.

16. 16. The cover-type endoscope according to appendix 15, wherein the knob cover is provided integrally with the operation section cover.

17. 16. The cover type endoscope according to appendix 15, wherein the knob cover is provided separately from the operation section cover.

18. Note 16 and Note 1 wherein the knob cover can slide on the outer peripheral surface of the bending operation knob in the knob axis direction.
The cover-type endoscope described in 7.

19. 18. The cover-type endoscope according to appendix 17, wherein the knob cover is provided with a sliding portion that is slidable with respect to the operation portion and a sliding state switching means of the sliding portion.

20. 20. The cover type endoscope according to appendix 19, wherein the sliding state switching unit is a sliding unit pressure holding unit.

21. 21. The cover endoscope according to appendix 20, wherein the sliding portion pressing and holding means is knob cover holding position switching means provided on the bending operation knob.

22. 18. The cover-type endoscope according to appendices 16 and 17, in which the inner diameter of the knob cover is larger than the outer diameter of the bending operation knob.

23. An insertion section cover, an insertion section to be inserted into the insertion section cover, and a hand side of the insertion section,
In a cover-type endoscope including a cover endoscope having an operation section having a bending operation mechanism having a gap formed in one surface thereof, the cover endoscope has a built-in object disposed in the gap. A characteristic cover-type endoscope.

24. 24. The cover type endoscope according to appendix 23, wherein the gap is provided in a central portion of a bending operation mechanism.

25. 24. The cover type endoscope according to appendix 23, wherein a through hole is provided in a central portion of the bending operation mechanism.

26. 26. The cover type endoscope according to appendix 25, wherein the through hole is provided in the gap forming portion.

27. 26. The cover-type endoscope according to appendix 25, wherein a built-in endoscope for a cover is inserted into the through hole.

28. 26. The cover type endoscope according to appendix 25, wherein a universal cord for collectively extending the built-in components of the cover endoscope is provided on one surface side of the operation portion.

29. 24. The cover-type endoscope according to appendix 23, wherein one of the built-in cover endoscopes is a light guide fiber.

30. 24. The cover-type endoscope according to appendix 23, wherein one of the built-in components of the cover endoscope is an observation image transmission cable.

31. 24. The cover type endoscope according to appendix 23, wherein one of the built-in components of the cover endoscope is an image guide fiber.

[0113]

As described above, according to the present invention, a plurality of conduits that are inserted through the insertion portion cover are arranged so that the operator can easily hold them, and the operation is performed without making the gripped portion have a large diameter. It is possible to provide a cover-type endoscope having good properties.

[Brief description of drawings]

1 to 4 relate to a first embodiment of the present invention,
FIG. 1 is a diagram showing a schematic configuration of a cover-type endoscope.

FIG. 2 is a view as seen from the direction of arrow A in FIG. 1 and is an explanatory view of a cover-type endoscope operation section including a partial cross section of the endoscope cover mouth section.

FIG. 3 is a perspective view of a cover endoscope operation section.

FIG. 4 is a view showing an arrangement position of each tube arranged between a mouth part and an operation part.

FIG. 5 is a diagram showing a schematic configuration of an insertion portion of a direct-view type cover-type endoscope.

FIG. 6 is a view showing a relationship between a raising knob and a raising wire.

7 to 12 show an endoscope cover in which an operation section cover is provided separately, and FIG. 7 is a view showing a schematic configuration of an insertion section cover.

FIG. 8 is a side view of the cover endoscope.

FIG. 9 is a front view of the cover endoscope.

FIG. 10 is a diagram showing a relationship between a conduit lumen and a conduit groove of an operating portion.

FIG. 11 is a cross-sectional view of a cover-type endoscope.

FIG. 12 is an axial sectional view of a cover-type endoscope.

FIG. 13 is a diagram showing a schematic configuration of a cover type endoscope operation section according to a second embodiment of the present invention.

14 is a diagram showing a schematic configuration of a direct-view type cover-type endoscope operation section shown in FIG.

FIG. 15 is a perspective view showing a schematic configuration of an operation unit according to a third embodiment of the present invention.

16 to 18 show another configuration of the operation portion cover, and FIG. 16 shows a schematic configuration of the knob cover.

FIG. 17 is a view showing the action of the knob cover.

FIG. 18 is a plan view of the knob cover.

19 to 21 show another configuration of the operation portion cover, and FIG. 19 is a diagram showing a schematic configuration of the knob cover.

FIG. 20 is a view showing the action of the knob cover.

FIG. 21 is a plan view of the knob cover.

FIG. 22 is a diagram showing a schematic configuration of another knob cover.

FIG. 23 is a diagram showing a configuration of an attachment / detachment opening of a knob cover.

FIG. 24 is a view showing a closed state of the attachment / detachment opening of the knob cover.

FIG. 25 is a view showing another configuration of the attachment / detachment opening of the knob cover.

FIG. 26 is a view showing another configuration of the attachment / detachment opening of the knob cover.

FIG. 27 is a diagram showing a schematic configuration of an operation unit.

28 is a sectional view taken along line FF of FIG. 27.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Cover-type endoscope 2 ... Insert part cover 3 ... Cover endoscope 8 ... Operation part 16 ... Suction tube 18 ... Air supply tube 19 ... Water supply tube 21 ... Grip part 36 ... Tube groove

Claims (1)

[Claims] 1. An insert section cover having internal ducts, the ducts extending from a grip section located on the proximal side, an insert section to which the insert section cover is attached, and a proximal side of the insert section. In a cover-type endoscope including a cover endoscope having an operation section located at a position, a conduit extending from the grip section of the insertion section cover is arranged along an outline of the grip section and the operation section. A cover-type endoscope characterized in that