JPH09215656A - Endoscope - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the workability of total washing and sterilizing work of an endoscope after the inspection by the endoscope by fitting a wire loading/ unloading part to any one of a first wire link part between the tip part of a wire and a moving member and a second wire link part between the base end part of the wire and a wire operation mechanism. SOLUTION: In the operation of an endoscope 1, a link member 22 can be advanced or retracted along the direction of the axis of an inserting part 2 by turning operation of an operation lever 16 of an operating part 3 and a hood 8 is operated to move forward or backward through an operation wire 10 connected to the link member 22. The hood 8 sticks forward by turning the operation lever 16 backward. A hand side end part of the operation wire 10 can be removed from a wire loading/unloading part 24 of the link member 22 by loosening a lock screw 27. As a result, a unit of the operation wire 10 and the hood 8 is taken off the endoscope 1 thereby facilitating washing or sterilizing work between the hood 8 and a tip hard part 5 and inside a wire pipeline 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an endoscope in which a moving member such as a hood is arranged at the tip of an insertion portion inserted into a body cavity.

[0002]

2. Description of the Related Art Generally, a fixed hood is attached to a distal end portion of an insertion portion to be inserted into a body cavity as an endoscope, and the hood keeps a constant distance between a distal end surface of the insertion portion and a body wall surface. There is a configuration in which endoscopic observation and treatment are performed in a closed state.

Japanese Utility Model Laid-Open No. 55-19682 discloses an endoscope having a structure in which a hood at the distal end of the insertion portion is supported so as to be movable in the axial direction of the insertion portion. in this case,
A wire operation mechanism for remotely operating the hood is provided on the proximal operation section connected to the proximal end of the insertion section. A proximal end portion of the operation wire of the hood is connected to the wire operation mechanism. Furthermore, the tip of this operation wire is connected to the hood side. Then, the hood is remotely operated via the operation wire along with the operation of the wire operation mechanism.

[0004]

However, in the endoscope in which the fixed hood is attached to the distal end portion of the insertion portion, the endoscope is attached when the hood is attached with the necessary amount of protrusion from the distal end surface of the insertion portion. There is a possibility that part of the hood may enter the observation screen and the part of the visual field may be blocked.

Further, in the case of an endoscope having a structure in which the hood is movably supported in the axial direction of the insertion portion as in Japanese Utility Model Laid-Open No. Sho 55-19682, the hood can be viewed from the observation screen of the endoscope. By moving the endoscope to a position where it is removed, it is possible to prevent a part of the field of view of the endoscope from being blocked by the hood.

However, in this technique, the distal end portion of the operating wire is fixed to the hood, and the proximal end portion of the operating wire is fixed to the wire operating mechanism of the proximal side operating portion. There is a problem that the hood cannot be removed. Therefore, there is a problem that it is difficult to perform cleaning / disinfecting work between the tip of the insertion portion of the endoscope and the hood.

Further, since the operation wire for moving the hood forward and backward is usually inserted in the wire conduit, there is a problem that it is difficult to perform the cleaning and disinfecting work in the wire conduit.
Therefore, in the above-mentioned conventional structure, it takes a lot of time to clean and disinfect the endoscope after the endoscopic examination, and there is a problem that the cleaning and disinfecting operation of the entire endoscope becomes long.

The present invention has been made in view of the above circumstances, and its purpose is to prevent the part of the observation field of view from being obstructed and to perform the work of cleaning and disinfecting the entire endoscope after the endoscopic examination. An object of the present invention is to provide an endoscope capable of improving the sex.

[0009]

According to the present invention, a proximal operating portion is inserted into a proximal end portion of an insertion portion to be inserted into a body cavity, and a distal end portion of the insertion portion is provided with an axial direction of the insertion portion. A movable member that is movably supported by the front end portion of the insertion portion and that keeps the distal end portion of the insertion portion away from the wall surface inside the body cavity, and is provided in the proximal operation portion. In an endoscope in which the moving member is driven to move back and forth in the axial direction of the insertion portion via an operation wire that is operated by a wire operating mechanism that is operated, a first portion between the distal end portion of the wire and the moving member. Of the wire connecting part or a second wire connecting part between the base end part of the wire and the wire operating mechanism is provided with a wire attaching / detaching part for detachably connecting the wire. .

According to the present invention, after the endoscopic examination, the wire is disconnected at the wire attaching / detaching portion so that the entire endoscope can be efficiently cleaned / disinfected with the moving member removed from the distal end portion of the insertion portion. It is the one.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION A first embodiment of the present invention will be described below with reference to FIGS. 1 (A) and 1 (B) and FIGS. 2 (A) and 2 (B). FIG. 1A shows a schematic configuration of a main part of the endoscope 1. An operating portion 3 on the proximal side is connected to a proximal end portion of an insertion portion 2 inserted into a body cavity of the endoscope 1.

Further, the insertion section 2 is provided with an elongated soft section (flexible tube section) 4. Further, a bending portion 6 that can be bent in the up-down direction and the left-right direction, for example, is disposed between the distal end hard portion 5 and the flexible portion 4 provided at the distal end portion of the insertion portion 2.

A bending operation knob (not shown) for bending the bending portion 6 is provided on the operation portion 3 on the hand side, and a base end portion of the universal cord 7 is connected to the operation portion 3. The connector fixed to the tip of the universal cord 7 is detachably connected to a light source device (not shown).

A substantially cylindrical hood (moving member) 8 is provided on the distal end hard portion 5 of the insertion portion 2. The hood 8 is movably supported along the outer peripheral surface of the distal end hard portion 5 in the axial direction of the insertion portion 2. The hood 8 is made of a transparent material. Of course, the hood 8 may be formed of an opaque material.

Further, the inner peripheral surface of the hood 8 is shown in FIG.
The connection pin 9 is attached as shown in FIG. The tip of the operation wire 10 of the hood 8 is attached to the connection pin 9. The wire 10 is inserted into a wire conduit 11 arranged in the insertion portion 2. This wire conduit 1
The tip portion of 1 is attached to the tip hard portion 5.

Further, the operating portion 3 has a large-diameter grip portion 12
A small diameter portion 13 disposed between the grip portion 12 and the flexible portion 4 is provided. Then, the proximal end side of the wire conduit 11 passes through the bending portion 6 and the flexible portion 4, and passes through the operating portion 3
Is extended in the small-diameter portion 13.

Further, a wire opening 11a on the proximal end side of the wire conduit 11 is arranged on the outer peripheral surface of the small diameter portion 13 of the operating portion 3. The proximal end side of the operating wire 10 extends through the wire conduit 11 to the operating part 3 side, and extends from the wire opening 11a of the wire conduit 11 to the small diameter part 1 of the operating part 3.
It has been taken out of 3.

Further, the hood 8 is provided on the grip portion 12 of the operation portion 3.
A hood operation mechanism 14 for remotely operating the is installed. The hood operation mechanism 14 includes an operation lever 16 rotatably supported on the outer peripheral surface of the grip portion 12 about a support shaft 15.
And a wire operating mechanism 17 disposed inside the grip portion 12.
Are provided.

Here, the base end portion of the operating lever 16 is integrally attached to the base end portion of the rotating member 18 inserted into the grip portion 12. One end of a link arm 19 is rotatably connected to the tip of the rotating member 18 about a rotating shaft 20.

The wire operating mechanism 17 has a connecting member 2 mounted in a guide groove 21 formed in the inner wall surface of the casing of the operating portion 3 so as to be movable only in the axial direction of the inserting portion 2.
2 are provided. The other end of the link arm 19 is rotatably connected to the base end of the connecting member 22 about a rotary shaft 23.

Further, a wire attaching / detaching portion 24 arranged outside the grip portion 12 of the operating portion 3 is provided at the tip of the connecting member 22. Here, an insertion opening 25 is formed at the tip of the grip portion 12 of the operation portion 3 so that the connecting member 22 is movably inserted in the axial direction of the insertion portion 2. The connecting member 22 is water-tightly slidable back and forth through the insertion port 25 in a state where the wire attaching / detaching portion 24 is arranged on the outer surface side of the small diameter portion 13.

The wire attaching / detaching portion 24 has a wire conduit 1
1. The wire receiving portion 26 into which the extended end portion of the operating wire 10 taken out of the small diameter portion 13 of the operating portion 3 from the wire opening portion 11a of 1 is inserted, and the operating wire inserted into the wire receiving portion 26. A fixing screw 27 screwed into a screw hole formed in a direction substantially orthogonal to the inserting direction of 10 is provided.

Then, the operation wire 1 is placed in the wire receiving portion 26.
By tightening the fixing screw 27 with 0 inserted, the operation wire 10 is firmly locked to the wire attaching / detaching part 24 with the operation wire 10 inserted in the wire receiving part 26. . Here, by loosening the fastening of the fixing screw 27, the locking of the operation wire 10 with the wire attaching / detaching portion 24 is released, and the operation wire 10 can be pulled out from the wire receiving portion 26.

Further, the grip portion 12 of the operating portion 3 has a first stopper 2 for restricting the front and rear rotation range of the operating lever 16.
8 and a second stopper 29 are provided respectively. When the operating lever 16 is rotated, the rotating member 18 rotates together with the operating lever 16, and the linking member 22 moves along the guide groove 21 via the link arm 19 in conjunction with the operation of the rotating member 18. The operation wire 10 is driven back and forth only in the axial direction of the insertion portion 2 to drive the operation wire 10 forward and backward in the axial direction of the insertion portion 2.

Here, with the operating lever 16 pivoted forward and the operating lever 16 is in contact with the first stopper 28 as shown in FIG. 1 (A), the hood 8 is at the rearmost position. It is supposed to be located. In addition, the operation lever 16
Is rotated rearward and the operating lever 16 is in contact with the second stopper 29, the hood 8 is projected to the frontmost as shown in FIG. 1 (B). At this time, the hood 8 is held at the protruding position where it is projected to the front side of the insertion portion 2, and the tip end surface of the tip rigid portion 5 is kept in a state of being separated from the wall surface inside the body cavity. FIG.
In (B), X indicates the moving distance of the hood 8.

Further, as shown in FIG. 1 (B), when the hood 8 is projected to the most forward projecting position, the front end portion of the hood 8 enters the field of view of the objective lens 30 of the endoscope 1. It has become. At this time, as shown in FIG. 2 (A), the front edge portion 32 of the hood 8 is displayed on the observation screen 31 of the monitor of the endoscope 1 and further outside the front edge portion 32 in the observation image of the endoscope. The portion of is blocked by the hood 8.

Further, as shown in FIG. 1 (A), the hood 8
The hood 8 does not enter the visual field of the objective lens 30 of the endoscope 1 in the state in which the hood 8 is located at the rearmost side. At this time, as shown in FIG. 2B, the observation screen 31 of the monitor of the endoscope 1 is held in a state where the front edge portion 32 of the hood 8 is not displayed, and the observation image 33 of the endoscope is displayed by the hood 8. It is prevented from being blocked. A bending operation knob (not shown) for remotely bending the bending portion 6 is provided on the operation lever 16 so as to be rotatable around the support shaft 15.

Next, the operation of the above configuration will be described.
When the endoscope 1 of the present embodiment is used, the connecting member 22 is rotated by rotating the operation lever 16 of the operation unit 3 in the front-back direction.
Can be moved forward and backward along the axial direction of the insertion portion 2, and the hood 8 can be moved forward and backward through the wire 10 connected to the connecting member 22. Here, when the hood 8 is not used, the operation lever 16 is rotated in the forward direction to bring the hood 8 to the rearmost position as shown in FIG. In this case, operations such as insertion of the endoscope 1, observation of the endoscope, and treatment with a treatment tool can be performed in a state where the field of view of the objective lens 30 of the endoscope 1 is not completely obstructed by the hood 8. it can.

By rotating the lever 16 backward, the hood 8 can be projected forward as shown in FIG. 1 (B). Therefore, in this case, the distal end portion of the hood 8 is brought into contact with the living body wall so that the observation treatment is performed while maintaining a constant distance between the living body wall and the objective lens 30 of the endoscope 1 during the endoscopic examination. Can be done.

In this way, the hood 8 is moved forward only when necessary, and when the hood 8 is not necessary, the hood 8 is kept rearward so as not to obstruct the visual field of the objective lens 30 of the endoscope 1. be able to.

By loosening the fixing screw 27,
The proximal end of the wire 10 can be removed from the wire attaching / detaching portion 24 of the connecting member 22. As a result, the unit of the wire 10 and the hood 8 can be removed from the endoscope 1, so that the cleaning / disinfecting work between the hood 8 and the hard tip portion 5 and the inside of the wire conduit 11 can be performed more easily than in the conventional case. Therefore, the working time can be shortened.

A plurality of types of hoods 8 having different shapes, shapes, and sizes are prepared in advance, and the plurality of hoods 8 are provided.
If necessary, a hood 8 of a suitable type may be selectively attached to and detached from the same endoscope 1.

The unit of the hood 8 and the wire 10 may be used in a disposable manner. In this case, the labor of cleaning and disinfecting the unit of the hood 8 and the wire 10 after using the endoscope 1 can be saved.

Therefore, the above configuration has the following effects. That is, the wire attaching / detaching portion 24 is provided at the wire connecting portion between the proximal end portion of the operating wire 10 of the hood 8 and the connecting member 22 of the wire operating mechanism 17, and the wire 10 is detachably connected to the wire attaching / detaching portion 24. Therefore, after the endoscopic examination, by disconnecting the wire 10 from the wire attaching / detaching portion 24, the entire endoscope 1 can be efficiently washed and disinfected in a state where the hood 8 is removed from the distal end hard portion 5 of the insertion portion 2. Therefore, cleaning and disinfection of the distal end hard portion 5 and the wire conduit 11 of the endoscope 1 are easier than in the conventional case.

Further, since the wire attaching / detaching portion 24, which is the attaching / detaching portion of the wire 10 and the connecting member 22, is arranged in front of the grip portion 12 of the operating portion 3, the wire is attached when the user grips the operating portion 3. There is no risk that the attachment / detachment portion 24 will get in the way.

Further, since the operating lever 16 of the hood 8 is arranged at the rear end position of the grip portion 12, the lever 16 does not interfere when gripping the operating portion 3 and the user operates it. It is possible to easily operate the lever 16 with a finger holding the portion 3.

Further, if the wire attaching / detaching portion 2 of the connecting member 22 is temporarily assumed.
Even if 4 is arranged in a part of the gripping part 12 of FIG. 1A, the wire attaching / detaching part 24 may be arranged in a position where the hand holding the gripping part 12 does not touch. For example, FIG.
In the state of (A), the palm of the grasping user's palm is arranged on the back side of the paper surface, and in this case, the connecting member 22 is provided in the vicinity of the portion where the rotating shaft 23 of FIG. 1 (A) is arranged. By arranging the wire attaching / detaching portion 24 of the user, the palm of the user who holds the holding portion 12 is placed on the wire attaching / detaching portion 2 of the connecting member 22.
There is no danger of hitting 4. Furthermore, in this case, since the fingers of the user's hand holding the grip portion 12 do not touch the wire attaching / detaching portion 24, they do not interfere. As described above, the wire attaching / detaching portion 2 of the connecting member 22 is provided on the surface of the gripping portion 12 on the side opposite to the contact surface with the palm even though it is on the gripping portion 12.
4 may be arranged.

Since the observation image 33 of the endoscope has a substantially rectangular shape, as shown in FIG. 1B, the hood 8 is projected to the frontmost protruding position, and the objective lens of the endoscope 1 is projected. Three
The amount of the observation image of the endoscope 1 blocked by the front edge portion 32 of the hood 8 with the front end portion of the hood 8 inserted in the field of view of 0 is relatively large in the opposite direction of the observation image of the endoscope 1. Although the number is small, the amount of blocking is large in the diagonal direction.

Therefore, when the hood 8 has a substantially rectangular shape and the lengths in the opposite side direction and the diagonal direction thereof are matched with the observation screen 31 of the monitor of the endoscope 1, the protrusion amount of the hood 8 is the same. However, as shown in FIG. 2 (B), the front edge portion 32 of the hood 8 can adjust the blocked amount in the diagonal direction and the diagonal direction to be substantially the same.

Further, FIG. 3 shows the endoscope 1 according to the first embodiment.
It shows a modified example of the hood 8. In this, a ridge is provided at the tip of the hood 8, and a portion corresponding to the opposite side in the observation screen 31 of the monitor of the endoscope 1 is a ridge 34.
The portion corresponding to the diagonal direction is the valley portion 35. In this case, even if the maximum protrusion amount of the hood 8 is the same as that in FIG. 1B, when viewed on the observation screen 31 of the monitor of the endoscope 1, the diagonal amount is as shown in FIG. 2B. A wider field of view can be secured depending on the direction.

FIG. 4 shows a second embodiment of the present invention. This is the endoscope 1 according to the first embodiment.
The tip hard portion 5 is provided with a substantially cylindrical soft hood 41.

Here, the body 4 of the distal end hard portion 5 of the endoscope 1
2, a linear guide groove 43 extending in the moving direction of the hood 41 is formed on the outer peripheral surface of the tip portion. An inward protrusion 44 that is inserted into the guide groove 43 is provided on the inner peripheral surface of the base end of the flexible hood 41. Further, the inward protruding portion 44 of the flexible hood 41 is provided with a through hole 45 extending in the same direction as the guide groove 43.

Further, the distal end portion of the operation wire 10 of the flexible hood 41 is attached to the proximal end portion of the claw member 46 which constitutes the wire attaching / detaching portion. A locking claw 47 is formed on the tip end side of the claw member 46. Then, the tip end side of the claw member 46 is inserted into the through hole 45 of the flexible hood 41,
The locking claw 47 on the tip end side of the claw member 46 is engaged with the inner wall surface of the through hole 45 and is releasably locked. Therefore, the flexible hood 41 is detachably connected to the claw member 46. Here, by pushing the claw member 46 into the through hole 45, the claw member 46 can be attached to the flexible hood 41 with a small force.

Further, when the soft hood 41 and the claw member 46 are connected, the locking claw 47 of the claw member 46 inserted into the through hole 45 of the soft hood 41 is embedded in the inner wall surface of the through hole 45, so that it is strong to some extent. The claw member 46 can be removed from the through hole 45 of the flexible hood 41 by releasing the engagement between the soft hood 41 and the claw member 46 by pulling the claw member 46 toward the hand side by applying a force.

A stopper 49 having a larger diameter than the guide hole 48 of the operation wire 10 and the through hole 45 of the soft hood 41 formed in the tip hard portion main body 42 is formed at the base end portion of the claw member 46. . The stopper 49 causes the entire claw member 46 to move into the guide hole 4 of the hard body 42 of the distal end.
8 and the through hole 45 of the flexible hood 41 are prevented from being inserted.

On the operation section 3 side of the endoscope 1, the flexible hood 41 can be remotely operated via the operation wire 10 by operating the operation lever 16 described in the first embodiment. In the operation section 3, the proximal end of the wire 10 does not necessarily have to be detachable as in the first embodiment.

Therefore, the following effects are obtained in this embodiment. That is, in the present embodiment, the flexible hood 41 is provided in the distal end hard portion 5 of the endoscope 1, and the claw member 46 at the distal end of the operation wire 10 is inserted into the through hole 45 of the flexible hood 41, whereby the flexible hood 41 is inserted. Since the claw member 46 on the side of the operation wire 10 is detachably connected, after the endoscope inspection, by removing the claw member 46 to the outside of the through hole 45 of the flexible hood 41, the distal end of the insertion portion 2 is hardened. The entire endoscope 1 can be efficiently cleaned and disinfected with the hood 41 removed from the portion 5. Therefore, in the present embodiment as well as in the first embodiment, it is easier to clean and disinfect the distal end hard portion 5 of the endoscope 1 as compared with the related art.

Further, particularly in the present embodiment, it is not necessary to remove the operation wire 10 from the endoscope 1. Therefore, it is possible to omit the troublesome work of putting the wire 10 in and out of the wire conduit 11 for attaching and detaching the hood 41 to and from the rigid tip portion 5, so that the attaching and detaching work of the hood 41 to and from the rigid tip portion 5 is easy. become. Further, even when the hood 41 is attached to the distal end hard portion 5 of the endoscope 1, the wire 10 is attached to the wire conduit 1
Since the work of inserting the hood 41 into the hood 41 can be omitted, the work of attaching the hood 41 becomes easy.

Further, since the wire 10 can be used in common even when different hoods 41 are used, when the dedicated operation wire 10 is used for each hood 41 when a plurality of hoods 41 are selectively used. Compared with this, cost reduction can be achieved.

Further, a plurality of flexible hoods 41 of various kinds having different colors, shapes, sizes, etc. are prepared in advance, and a suitable flexible hood 41 is selectively selected from among the flexible hoods 41 if necessary. It may be configured to be detachably attached to the unit 46.

Further, the operation wire 10 may be detachable from the endoscope 1 as in the first embodiment. In this case, as in the first embodiment, the inside of the wire conduit 11 can be easily cleaned.

FIG. 5 and FIG. 6 show a third embodiment of the present invention. This is provided with an external wire conduit 51 that is separate from the insertion portion 2 of the endoscope 1, and the tip side of this wire conduit 51 is fixed to the outer peripheral surface on the tip end side of the insertion portion 2 of the endoscope 1. The band 52 is detachably fixed, and the operation wire 10 of the hood 8 of the first embodiment is inserted into the wire conduit 51.
In this case, the wire conduit 51 is unitized with the operation wire 10 and the hood 8 to form an operation wire unit 53.

Further, a ring-shaped fixing member 54 is attached to the proximal end of the wire conduit 51. A groove 55 is formed on the outer peripheral surface of the fixing member 54. In this case, the operation pin 3 of the endoscope 1 is provided with a fixing pin 56 of the wire conduit 51 in a protruding manner. Then, the groove portion 55 of the fixing member 54 of the wire conduit 51 is fitted into the fixing pin 56.

The proximal end of the operating wire 10 extends from the proximal end of the wire conduit 51. A rack 57 is attached to the extended end of the operation wire 10. In this case, a pinion 58 that meshes with the rack 57 and a cutout portion 59 that is juxtaposed with the pinion 58 are formed at the base end portion of the operation lever 16 of the hood 8.

Further, the operation shaft 3 of the endoscope 1 has a support shaft 15 attached thereto.
On the other hand, the pedestal 60 is disposed on the side opposite to the tip end side of the operation lever 16. Further, when the fixing member 54 of the wire conduit 51 is fixed to the fixing pin 56 of the operation portion 3, the receiving base 60 on the operation portion 3 and the notch 59 under the lever 16 are provided.
A rack 57 is disposed between the rack 57 and.

When the operation lever 16 is rotated, the rotation operation of the operation lever 16 is converted into the forward / backward movement of the operation wire 10 through the meshing portion between the pinion 58 and the rack 38, and the operation wire 10 is moved into the hood. It is adapted to be driven back and forth in the moving direction of 8.

Therefore, the present embodiment has the following effects. That is, in the present embodiment, an operation wire unit 53 is provided in which the hood 8, the operation wire 10 and the wire conduit 51 are integrally unitized, and the distal end portion of the operation wire unit 53 is viewed by the fixing band 52. While being detachably fixed to the outer peripheral surface of the insertion portion 2 of the mirror 1,
Since the fixing member 54 at the proximal end portion of the wire conduit 51 is detachably connected to the fixing pin 56 of the operation portion 3, after the endoscopic examination, the operation wire unit 53 is inserted into the insertion portion of the endoscope 1. By removing the hood 8 from the distal end rigid portion 5 of the insertion portion 2, the entire endoscope 1 can be efficiently cleaned and disinfected with the hood 8 removed. Therefore, in the present embodiment as well as in the first embodiment, it is easier to clean and disinfect the distal end hard portion 5 of the endoscope 1 as compared with the related art.

Further, in the present embodiment, particularly in the case of an inspection in which the use of the hood 8 is unnecessary, the operation wire unit 53 including the hood 8, the operation wire 10 and the wire conduit 51 is used as an endoscope. It can be used without being attached to the insertion portion 2 of 1. Therefore, in this case, there is an advantage that the endoscope inspection can be performed with the insertion portion 2 of the endoscope 1 having a small diameter.

Then, only in the case of the inspection using the hood 8, the distal end portion of the operation wire unit 53 of the hood 8, the wire 10 and the wire conduit 51 is fixed by the fixing band 52 to the distal end of the insertion portion 2 of the endoscope 1. The fixing member 54 is positioned and fixed to the fixing pin 56 on the operation unit 3 side. At this time, when the lever 16 is not operated, the rack 57 and the pinion 58 are not meshed with each other, so that the attachment / detachment work of the proximal end portion of the operation wire unit 53 is easy.

Further, the operation wire unit 53 is the endoscope 1
When the lever 16 is operated in a state in which the pinion 58 is set in the insertion section 2 of the rack 57, the pinion 58 meshes with the rack 57,
Can be moved back and forth in the front-back direction, and the hood 8 at the tip
You can move back and forth. In this case, since the proximal side of the wire conduit 51 is positioned by the fixing pin 54 of the operation unit 3, even if the wire 10 moves in the front-back direction, the wire conduit 1
1 does not move, and good function can be secured.

The operation wire unit 53 including the hood 8, the operation wire 10 and the wire conduit 51 may be used in a disposable manner. In this case, the labor for cleaning and disinfecting the operation wire unit 53 including the hood 8 after using the endoscope 1, the operation wire 10, and the wire conduit 51 can be omitted.

7 and 8 show the fourth embodiment of the present invention. This is a cover-type endoscope 7
1 is an application of the present invention. That is, the cover-type endoscope 71 of the present embodiment is provided with the insertion section cover 73 that covers the periphery of the insertion section 72 that is inserted into the body cavity.

As shown in FIG. 7, the insertion section cover 73 has a distal end cover 75 for covering the distal end hard portion 74 of the endoscope 71.
An outer skin tube 77 for covering the bending portion 76 and the flexible portion (not shown) of the endoscope 71, and the endoscope 71 as shown in FIG.
A hand mouth portion 79 is provided to cover the operation portion 78 on the hand side.

The tip cover 75 of the insertion section cover 73 is also provided.
A hood 80 having a substantially cylindrical shape is provided at the position movably in the axial direction of the insertion portion 72. The tip of an operation wire 81 is attached to the hood 80. This operation wire 8
1 is inserted through the tip end of the wire conduit 82.
5 is attached to the rear end.

Also, the proximal mouth portion 79 of the insertion portion cover 73
Is fixed to the operation unit 78 on the near side of the endoscope 71. Further, the wire duct 82 is provided in the hand mouth portion 79.
The rear end is fixed. The proximal end of the operating wire 81 extended from the proximal end of the wire conduit 82 is detachably fixed to the operating portion 78 of the endoscope 71 by the same configuration as that of the third embodiment. ing.

The operating portion 78 of the endoscope 71 is covered by the operating portion cover 83. In addition, the insertion portion cover 7
As shown in FIG.
Are formed. When the insertion portion 72 of the endoscope 71 is gripped, the small diameter portion 84 facilitates gripping the insertion portion 72 through the outer skin 77.

Further, an adhesive portion which becomes adhesive by heat may be provided on the back surface side of the small diameter portion 84 of the outer cover 77 of the insertion portion cover 73. In this case, by applying heat to the adhesive portion on the back surface side of the small diameter portion 84 of the outer skin 77, the insertion portion 72 in the insertion portion cover 73, the outer skin 77, and the wire conduit 82.
(And a treatment tool insertion channel (not shown) or the like) can be collectively adhered, and the insertion portion 72 can be more easily gripped.

Therefore, in the present embodiment, the cover type endoscope 71 is covered with the new insertion portion cover 73 before the endoscopic examination, so that the cover type endoscope 71 does not need to be washed and disinfected. Further, since the insertion section cover 73 is provided with the hood 80, the operation wire 81, and the wire conduit 82, if the insertion section cover 73 removed from the endoscope 71 after the endoscopic examination is discarded, the hood 80 and the wire 81 are removed. It is not necessary to clean and disinfect the wire conduit 82.

Therefore, the hood 80 is used in this embodiment.
Since the wire 81 and the wire conduit 82, which are components of the forward / backward operation mechanism, are attached to the insertion portion cover 73 used in a disposable manner, the cover-type endoscope 71
No cleaning or disinfection is required on the side.

FIG. 9 shows a fifth embodiment of the present invention. In the present embodiment, as in the first embodiment, a thin rod-shaped abutting member 91 is provided in the distal end hard portion 5 of the endoscope 1 so as to be movable back and forth instead of the hood 8 covering the distal end hard portion 5. is there. The mechanism for moving the contact member 91 back and forth is the same as the hood operation mechanism 14 of the first embodiment. That is, the distal end portion of the operation wire 10 of the hood operation mechanism 14 of the first embodiment is fixed to the base end portion of the contact member 91.

In this embodiment, the contact member 9 is
As shown by the dotted line in FIG. 9, 1 is made to project to the front of the distal end hard portion 5 and brought into contact with the living body wall 92, so that the living body wall 9
2 and the objective lens 30 of the distal end hard portion 5 of the endoscope 1 can be kept at a constant distance. Further, when the contact member 91 is held at the frontmost protruding position, the contact member 91 enters the field of view of the objective lens 30 as shown in FIG. When it is moved to the position, it is arranged outside the range of the visual field of the objective lens 30.

Therefore, in the present embodiment, the abutting member 91 is normally located at the rearmost position so that the abutting member 91 does not enter the visual field of the objective lens 30, and the abutting member 91 is abutted only when necessary. The member 91 can be projected forward to maintain a constant distance from the living body wall 92. Further, since the contact member 91 of the present embodiment is a thin rod-shaped member, the diameter of the tip hard portion 5 can be made smaller than in the case where the substantially cylindrical hood 8 that covers the entire tip hard portion 5 is used. .

The present invention is not limited to the above-mentioned embodiments, and it goes without saying that various modifications can be made without departing from the gist of the present invention. Next, other characteristic technical matters of the present application will be additionally described as follows.

(Supplementary Note 1) A moving member that has an observation optical system and is movable forward and backward so as to keep the insertion tip and the wall of the body cavity inserted into the body cavity at a desired interval. , A wire whose distal end is connected to the moving member and whose proximal end is guided to an operating portion provided on the proximal side of the insertion portion and a proximal end of the wire are connected to advance and retract the wire and the movable member. In an endoscope having an advancing / retreating operation mechanism provided in the operating portion, at least one of the moving member and the wire or the connecting portion between the wire and the advancing / retreating operation mechanism is detachable from the wire. The characteristic endoscope.

(Prior Art of Supplementary Note 1) A hood is provided at the distal end of the endoscope for observing while keeping a desired distance between the observation optical system arranged at the distal end of the endoscope and the wall of the body cavity. There is an endoscope.

(Problem to be Solved by Supplementary Note 1) A part of the field of view of the endoscope may be blocked by such a hood. Therefore, in order to prevent such a problem, there has been one in which the hood is movable in the endoscope insertion axis direction.
In this movable hood, the hood and the operating portion on the proximal side are connected by a wire and the wire is inserted into the conduit, and the hood and the wire cannot be attached or detached. The endoscope is to be cleaned and disinfected on a case-by-case basis, and it has been very difficult to clean and disinfect the endoscope having the hood, the wire, and the duct.

Therefore, if the hood and the wire and the wire and the operating part are detachably connected, the connection can be released to clean and disinfect the endoscope, which facilitates the work.

(Purpose of Supplementary Note 1) The present invention provides an endoscope having good detergency as described above. (Supplementary Note 2) A moving member that has an insertion portion and an operating portion and is movable forward and backward by protruding from the tip surface is provided at the tip of the insertion portion. In an endoscope in which an advance / retreat operation mechanism is provided, and a proximal end of the wire is connected to a part of the advance / retreat operation mechanism, at least one of a connecting portion between the moving member and the wire or a wire and the advance / retreat operation mechanism is detachable. An endoscope characterized by.

(Purpose of Supplementary Note 2) An object of the present invention is to provide an endoscope capable of improving the cleaning / disinfecting property of an endoscope in which a hood provided at the distal end can be operated to move forward and backward. (Means for Solving the Problem of Supplementary Note 2) By making the connecting portion between the hood and the wire or the connecting portion between the wire and the advancing / retreating operation portion detachable, the hood can be removed from the scope after the inspection. The cleaning and disinfecting properties of the scope can be improved.

(Effect of Supplementary Note 2) Cleaning and disinfecting properties can be improved in an endoscope in which a moving member provided at the distal end of the endoscope can be operated to move forward and backward by the hand side. (Additional Item 3) The endoscope according to Additional Item 2, wherein the connecting portion between the moving member and the wire is detachable.

(Additional Item 4) The endoscope according to Additional Item 3, wherein different moving members are detachably attached to the same wire. (Additional Item 5) The endoscope according to Additional Item 2, wherein a connecting portion between the wire and the advancing / retreating operation mechanism is detachable.

(Additional Item 6) The endoscope according to Additional Item 5, wherein the connecting portion is other than the grip portion of the operating portion. (Additional Item 7) In the above additional item 5, the endoscope is characterized in that the connecting portion is provided on a surface which is paired with the palm contact surface of the operating portion gripping portion.

(Additional Item 8) In the above additional item 5, an endoscope in which different moving members are detachably attached to the same endoscope. (Additional Item 9) The endoscope according to Additional Item 5, wherein the fixing means of the connecting portion is a screw.

(Additional Item 10) In the above additional item 5,
An endoscope characterized in that the fixing means of the connecting portion is of a rack and pinion system. (Additional Item 11) In the above additional item 10, the endoscope is not fixed except when the lever is operated and is fixed only when the lever is operated.

(Additional Item 12) In the above additional item 5,
An endoscope characterized in that a moving member, a wire, and a wire duct which are separate from the endoscope are detachably attached to the endoscope. (Additional Item 13) The endoscope according to Additional Item 12, wherein the proximal side of the wire conduit can be positioned and fixed to the endoscope.

(Additional Item 14) In the above additional item 2,
A moving member, a wire, and an endoscope cover that can be attached to and detached from the endoscope.
A wire conduit was provided so that the proximal end of the wire could be attached to and detached from the endoscope operation section.

(Additional Item 15) In the above additional item 2,
When the moving member is at the rearmost position, it is out of the visual field, and when it is at the most distal end, it is in the visual field. (Supplementary note 16) In an endoscope that displays an observation image on a substantially rectangular screen, the opening shape of a hood provided at the tip of the endoscope is adjusted to the screen shape.

(Prior Art of Supplement 16) It was a well-known technique to attach a hood for observation treatment while keeping a constant distance from the body wall. (Problem to be Solved by Supplementary Note 16) When the observation treatment is performed while keeping the required distance in this manner, the hood tip sometimes comes into the observation visual field. When the monitor screen that displays the observation image with an electronic endoscope is not a circle but a shape that is close to a rectangle, if the hood is a simple round shape, the diagonal direction of the screen will be blocked by the hood more than the diagonal direction. There was a big problem.

(Purpose of Supplementary Note 16) It is an object of the present invention to provide an endoscope which can secure a wider field of view when the hood is projected to enter the field of view. (Means for Solving the Problem of Supplementary Note 16) A portion shielded by the hood in the diagonal direction of the screen by changing the shape of the portion of the hood in the diagonal direction of the screen from the portion in the diagonal direction of the screen. Was reduced.

(Effect of Supplementary Note 16) It is possible to secure a wider field of view when the hood attached to the tip of the endoscope is within the field of view for observation. (Additional Item 17) In the above additional item 16, the hood opening shape is substantially rectangular, and the screen can be fixed by matching the diagonal direction of the screen, the diagonal direction of the screen, and the diagonal direction of the hood. Endoscope.

(Supplementary Note 18) In Supplementary Note 16, the hood has axial ridges and valleys, a portion corresponding to the opposite side of the screen is a valley portion, and a portion corresponding to a diagonal direction of the screen is a ridge portion. An endoscope that does.

[0092]

According to the present invention, the first wire connecting portion between the distal end portion of the operating wire of the moving member and the moving member, or the second wire connecting between the proximal end portion of the wire and the wire operating mechanism. Since the wire attachment / detachment part that attaches / detachably connects the wire to at least one of the connection parts is provided, there is no risk of obstructing part of the observation field of view, and the entire endoscope is cleaned and disinfected after the endoscopic examination. The workability of can be improved.

[Brief description of drawings]

1A is a schematic configuration diagram of an endoscope according to a first embodiment of the present invention, and FIG. 1B is a view for explaining a protruding operation of a hood of the endoscope according to the first embodiment. Explanatory drawing.

FIG. 2A is a plan view showing an observation screen of a monitor when the hood of the endoscope of the first embodiment is moved to the maximum retracted position, and FIG. 2B is a plan view of the first embodiment. FIG. 6 is a plan view showing an observation screen of the monitor in which a part of the visual field is blocked by the hood when the hood of the endoscope is moved to the maximum protruding position.

FIG. 3 is a side view showing the shape of the tip of the hood in the modification of the first embodiment.

FIG. 4 is a vertical cross-sectional view of a main part showing a second embodiment of the present invention.

FIG. 5 is a side view showing a distal end portion of an endoscope according to a third embodiment of the present invention.

FIG. 6 is a schematic configuration diagram of a wire operating mechanism according to a third embodiment.

FIG. 7 is a vertical cross-sectional view of a main part showing a fourth embodiment of the present invention.

FIG. 8 is a side view showing a portion around an operation unit on a hand side of an endoscope according to a fourth embodiment.

FIG. 9 is a vertical cross-sectional view of a main part showing a fifth embodiment of the present invention.

[Explanation of symbols]

 2 insertion part 3 operation part 8, 80 hood (moving member) 10 operation wire 11 bending operation wire 17 wire operating mechanism 24 wire attaching / detaching part 41 soft hood (moving member) 46 claw member (wire attaching / detaching part) 91 contact member (moving) Element)

Claims (1)

[Claims] 1. A proximal operation portion is connected to a proximal end portion of an insertion portion to be inserted into a body cavity, and a distal end portion of the insertion portion is movably supported in an axial direction of the insertion portion, Operation of a wire operation mechanism provided in the proximal operation section, including a moving member that keeps a distal end portion of the insertion section away from a wall surface in a body cavity at a protruding position that is protruded to the front side of the insertion section. In the endoscope, in which the moving member is driven to move back and forth in the axial direction of the insertion portion via the operation wire, a first wire connecting portion between the distal end portion of the wire and the moving member, or An endoscope comprising a wire attaching / detaching portion detachably connecting the wire to at least one of second wire connecting portions between a proximal end portion of the wire and the wire operating mechanism.