JPH07184830A - Endoscope cover type endoscope apparatus - Google Patents

Abstract

PURPOSE:To ensure an operation function of a drive mechanism provided on an endoscope cover along with an inexpensive construction of the cover. CONSTITUTION:A treating device erecting wire 48 and a wire tube 49 for guiding the wire are inserted through an inserting part cover part 18 of an endoscope cover and extended from a mouth body part 33 on the hand side. A tr-eating device erecting knob 64 is mounted rotatably on a rotating shaft 63 with a bending operation knob at an upper part thereof on the side of an endoscope operating section 13 and an erecting wire 48 is connected thereto. A recess part 62 is provided at a part of the outer circumference part of the wire tube 49 terminal. On the other hand, two pins 65 are provided so as to jut near the rotating shaft 63 of the endoscope operating section 13 at an narrower interval than the outer diameter of the wire tube 49 and the recess part 62 of the wire tube 49 is allowed to be fitted into the pins 65 when the mouth body part 33 is mounted on the endoscope operation section 13. The movement of the wire tube 49 is regulated in the axial direction thereof.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention includes an endoscope cover for covering an insertion portion of an endoscope, and a treatment instrument raising device for raising a treatment instrument or the like inserted through a channel of the endoscope cover. The present invention relates to an endoscope cover type endoscope apparatus having a drive mechanism for a member at the tip of the endoscope cover.

[0002]

2. Description of the Related Art In recent years, endoscopes have been widely used in the medical field and the like. When an endoscope used in the medical field is inserted into a living body, the observation window provided at the distal end portion of the insertion portion may not be sufficiently observed due to adhesion of body fluid or the like. For this reason, the endoscope is provided with an air supply conduit or a water supply conduit so that the observation window can be sprayed with a fluid such as a cleaning liquid or a cleaning gas to remove the body fluid or the like adhering to the observation window by the operation on the near side. Has been. Further, there is also a device provided with a suction pipe line for sucking and discharging unnecessary body fluid and the like. In addition, there is one in which a treatment instrument channel is provided so that a tissue can be collected with a biopsy forceps or a treatment treatment with a treatment instrument can be performed.

For endoscopic examination, it is necessary to use a clean endoscope that has been thoroughly washed and disinfected before the examination.

Therefore, in the case of an endoscope provided with a conduit such as the air supply conduit or a treatment instrument channel, when it is used for a patient or the like, cleaning or sterilization treatment must be performed in order to reliably prevent infections and the like. Is given. However, it takes a long time to completely perform cleaning or sterilization, so that there is a problem that the use efficiency of the endoscope is lowered.

Therefore, by using the endoscope itself in a state of being covered with the endoscope cover provided with the air / water supply conduit, etc., only the endoscope cover is replaced as a disposable after use, and after use. Also, there has been proposed an endoscope cover-type endoscope apparatus which does not require sanitary consideration by keeping the endoscope itself clean.

As an endoscope apparatus of an endoscope cover system,
For example, Japanese Patent Publication No. 2-54734, U.S. Pat. No.
Japanese Patent Laid-Open No. 3,162,190 discloses a device in which an endoscope insertion portion is inserted into a cover, and the endoscope insertion portion is covered with the cover so as to be insulated from an external environment.

The endoscope of the endoscope cover type as described above is
The insertion part is cleaned or sterilized and disinfected in advance. Then, with the endoscope cover covering the insertion portion of the endoscope, the endoscope is inserted into the body cavity of the patient for inspection and treatment, and after use, the endoscope cover is removed and discarded. I will end up. In this way, by disposing the endoscope cover for each patient, the endoscope does not need to be washed and disinfected,
It can be kept clean at all times and is very convenient. And
The endoscope can be used continuously without re-cleaning and re-disinfecting.

In an endoscope having an endoscope cover system, which has a treatment instrument raising device for raising the distal end portion of a treatment instrument such as forceps inserted through a treatment instrument channel in the endoscope cover, for example, As shown in FIG. 15, a portion of the wire tube 53, through which the treatment instrument raising wire is inserted, in the operation portion fixing mouth portion 52 on the proximal side of the insertion portion cover portion 51, is positioned and fixed by the fixing portion 54. It is composed. By fixing a part of the wire tube 53 in this manner, even if the treatment tool raising wire in the wire tube 53 is pushed and pulled, the wire tube 53 moves in the axial direction together with the treatment instrument raising wire. Without it, you can secure the up / down function.

[0009]

An endoscope of the endoscope cover system provided with a treatment instrument raising device for raising a treatment instrument inserted in a channel, for example, as a drive mechanism for a member at the distal end portion of the endoscope cover. In order to secure the raising / lowering function of the treatment instrument raising device provided on the endoscope cover, a part of the wire tube, through which the treatment instrument raising wire is inserted, for fixing the operation portion as described above. When the wire tube 53 is fixed to the mouth portion, it is necessary to fix the wire tube 53 at the fixing portion 54 by means such as bonding, and therefore, the time for bonding the wire tube at the time of assembling the endoscope cover is long. As a result of this, and since it takes time and effort to position the wire tube at a predetermined position during bonding, there is a problem in that the assembly cost is increased and the endoscope cover cannot be inexpensively constructed.

The present invention has been made in view of these circumstances, and has a drive mechanism for a member at the distal end portion of an endoscope cover such as a treatment instrument raising device for raising a treatment instrument inserted in a channel. In view of the above, it is an object of the present invention to provide an endoscope cover type endoscope apparatus that can secure the operation function of the drive mechanism and can be configured at low cost.

[0011]

An endoscope cover type endoscope apparatus according to the present invention comprises an endoscope and an endoscope cover for covering at least an insertion portion of the endoscope, A driven member provided at a distal end portion of the insertion portion of the endoscope cover, one end of which is connected to the driven member and the other end of which is extended toward the insertion portion proximal side of the endoscope cover. And a guide member that is provided on the endoscope cover, guides the transmission member, and is provided on an operation portion on the proximal end side of the insertion portion of the endoscope, and is connected to the transmission member. An operating member for driving and operating the driven member,
The operation section of the endoscope is provided with a restricting unit that restricts the movement of the guide member in the axial direction.

[0012]

With the above construction, when the endoscope cover is mounted on the endoscope, the movement of the guide member for guiding the transmission member in the axial direction is restricted by the restriction means, and the operation of the transmission member is ensured.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 8 relate to a first embodiment of the present invention, FIG. 1 is an explanatory view showing the overall configuration of an endoscope apparatus of an endoscope cover system, and FIG. 2 is a view of an insertion portion cover portion of the endoscope cover. FIG. 3 is a perspective view showing a configuration, FIG. 3 is a perspective view showing a state in which the endoscope cover is attached to a cover endoscope, FIG. 4 is a perspective view showing a configuration of a distal end portion of the endoscope cover, and FIG. FIG. 6 is a cross-sectional view showing the configuration of the distal end portion of the mirror cover, FIG. 6 is a perspective view showing an external configuration example of the insertion portion of the cover endoscope to be inserted into the endoscope cover, and FIG. 7 is provided inside the endoscope cover. FIG. 8 is a perspective view showing a configuration example of a duct tube, and FIG. 8 is an explanatory diagram showing a configuration around a mouth portion on the proximal side of the endoscope cover and an operation portion of the cover endoscope.

As shown in FIG. 1, an endoscope cover type endoscope apparatus 1 has an endoscope cover type endoscope (hereinafter referred to as a cover type endoscope) 2. The cover-type endoscope 2 includes a channel-equipped endoscope cover (hereinafter referred to as an endoscope cover) 3 provided with channels such as an air / water supply conduit, a suction conduit, and a treatment tool channel. The endoscope cover 3 is attached to the endoscope cover 3 (hereinafter, referred to as a cover endoscope) 4 in combination. When performing an endoscopic inspection, the insertion portion of the cover endoscope 4 and the like are covered with the clean endoscope cover 3, and the endoscope cover 3 is discarded after the inspection. The mirror 4 is characterized by being covered with a new clean endoscope cover 3 and used repeatedly. This makes it unnecessary to clean and disinfect the endoscope after the inspection.

The endoscope apparatus 1 includes the cover type endoscope 2, a cart 5 in which various peripheral devices and the like to which the cover type endoscope 2 is connected are installed, and the cover type endoscope. It has a cover holder 6 for holding the mirror 2.

The cart 5 includes, for example, a light source device 7, a video processor 8, a fluid control device 9, and an endoscope cover extender (hereinafter referred to as an endoscope cover extender used when the endoscope 4 for the cover is attached to the endoscope cover 3). , Abbreviated as dilator) 10 and the like. Further, on the upper surface of the cart 5, a monitor 11 that receives a video signal from the video processor 8 and displays an endoscopic image is placed.

The cover endoscope 4 includes an operation portion 13 which also serves as a large-diameter grip portion at the proximal end of the elongated endoscope insertion portion 12 on the proximal side.
, The universal cord 14 extends from the side portion of the operation portion 13, and the connector 15 is provided at the end portion of the universal cord 14.

The light source device 7 is detachably connected to the cover endoscope 4 via the connector 15 and supplies illumination light to the endoscope. Further, the video processor 8 is detachably connected to the cover endoscope 4 via a signal cable 16 extending from a side portion of the connector 15, and drives an image pickup means built in the cover endoscope 4. , And the signal output from the image pickup means is converted into a standard video signal and output to the monitor 11.

An extension tube 17 is connected to the dilator 10, and the endoscope cover 3 is connected via the extension tube 17.
This is for injecting air into the interior for expansion, and by this expansion, the endoscope cover 3 can be easily attached or withdrawn. When the endoscope cover 3 is attached to or detached from the cover endoscope 4, the cover holder 6 is used.
With this, the base end side of the endoscope cover 3 is held and the cover endoscope 4 is inserted or withdrawn.

The endoscope cover 3 comprises a flexible insertion section cover section 18, an operation section cover section 19 and a universal cord cover section 20 which are made of a thin and soft polymer material such as vinyl chloride. The endoscope insertion portion 12, the operation portion 13, and the universal cord 14 of the cover endoscope 4 are respectively covered.

The fluid control device 9 is provided with an air supply control valve 21, a water supply control valve 22 and a suction control valve 23, and supplies air, water,
The suction is controlled by these solenoid valves. The air supply control valve 21, the water supply control valve 22, and the suction control valve 23 are connected to an air supply pipe line 24, a water supply pipe line 25, and a suction pipe line 26 extending from the insertion section cover portion 18, respectively.

A suction tube 27 is connected to the other side of the suction control valve 23, and a suction device (not shown) is connected to the end portion of the suction control valve 23 so that unnecessary body fluid or the like is sucked from the distal end portion of the endoscope. ing. A water supply tube 28 is connected to the other side of the water supply control valve 22, and a water supply tank 29 is connected to the tip portion thereof. Further, two air supply tubes 30 extend from the fluid control device 9, and the air supply control valve 2
1 and the water supply tank 29.

FIG. 2 shows the insertion portion cover portion 1 of the endoscope cover 3.
8 shows the configuration of No. 8. The insertion portion cover portion 18 is an endoscope operation portion fixing mouth portion (hereinafter referred to as a mouth portion) for connecting and fixing the cover tip constituent portion 31, the cover outer skin 32, and the operation portion 13 of the endoscope from the front end side. 33) are connected airtightly. The cover tip forming portion 31 is provided with an observation opening 34 and a channel opening 35. A transparent cover glass is provided in the observation opening 34, and the observation window and the illumination window of the endoscope inserted inside the cover face each other, and irradiation of illumination light toward the examination site and the examination site Can be observed. In addition, the mouth portion 33,
A treatment instrument insertion port 36 that communicates with the treatment instrument channel provided inside is provided.

FIG. 3 shows a state in which the endoscope cover 3 is attached to the cover endoscope 4. After inserting the insertion section 12 of the cover endoscope 4 into the insertion section cover section 18, covering the operation section 13 of the endoscope with the operation section cover section 19, and covering the universal cord 14 with the universal code cover section 20, Each part of the cover endoscope 4 is fixed to the endoscope cover 3 by winding the fixing tape 38 around the joint between the cover parts and fixing the fixing tape 38.
(The insertion section cover section 18, the operation section cover section 19, and the universal cord cover section 20) are airtightly covered so as to be isolated from the external environment.

FIG. 4 shows the structure of the distal end forming portion 31 of the endoscope cover. The tip forming portion 31 is made of a hard resin or the like, and communicates with an endoscope insertion channel provided in the insertion portion cover portion 18, and an endoscope leading end insertion hole 41 into which the endoscope leading end fits, A channel distal end portion 42 communicating with the treatment instrument channel is provided, and the distal end portion of the treatment instrument channel is opened to the outside from the channel opening portion 35. Observation opening 34 on the side of the endoscope distal end insertion hole 41
Is provided with a cover glass 43, which allows light to pass therethrough and isolates the distal end portion of the endoscope from the external environment.

The tip portion of the insertion portion cover portion 18 of the endoscope cover including the tip forming portion 31 has a structure shown in FIG. 5 when shown in a sectional view in the axial direction.

A channel tube 45 constituting a treatment instrument channel 44 is inserted into the insertion portion cover portion 18, and the distal end portion of the channel tube 45 is connected to the distal end forming portion 31 and provided in the distal end forming portion 31. To the channel end portion 42. A treatment instrument raising base 46, which is a driven member for raising the treatment instrument that has been inserted through the treatment instrument channel 44, is rotatably installed at the channel tip portion 42. The treatment instrument raising base 46 has a base end portion fixed by a rotation shaft 47 so that the treatment instrument raising base 46 can be rotated in the channel distal end portion 42 around the base end portion. A pulling wire 48 that serves as a transmission member that pulls the raising table 46 up and down by pulling is connected. The raising wire 48 is used for the insertion portion cover portion 18
The rear end side extends to the mouth part 33 on the cover proximal side, passing through the inside of the wire tube 49 that is a guide member connected to the front end forming part 31 through the inside.

Although not shown, the insertion portion cover portion 18
An endoscope insertion channel into which the cover endoscope 4 is inserted is a channel tube 45 of the treatment instrument channel 44.
It may be provided substantially parallel to.

Insertion Portion of Endoscope Cover The insertion portion 12 of the cover endoscope 4 to be inserted into the cover portion 18 has an outer peripheral portion as shown in FIG. 6, for example.

The first example of FIG. 6A is the endoscope insertion portion 1
In Fig. 2, the fluorine-based resin tape 58 is wound around the flexible tube portion 57 behind the curved portion 56 with no gaps. The surface of the general flexible tube portion 57 is formed of polyurethane resin or a resin in which polyester resin and polyurethane resin are mixed, and has a large contact resistance with the inside of the endoscope cover. Although it was easy to stick and the insertion of the endoscope insertion part was difficult in some cases, by using a fluorine resin on the surface of the flexible tube part 57 as in this example, the slipperiness was improved and the insertion / removal property was improved. Can be improved.

The second example of FIG. 6 (b) is an endoscope insertion portion 1
A fluorine-based resin tape 58 is spirally wound around both the curved portion 56 and the flexible tube portion 57 of No. 2. With this structure, not only the flexible tube portion 57 but also the surface of the curved portion 56 made of an elastic rubber material can be slippery, and the insertion / removal property of the insertion portion can be improved.

When the outer surface of the insertion portion is constructed in this way,
The fluorine-based resin tape 58 is used for the endoscope insertion portion 12 from the beginning.
It may be configured so that it is wrapped around, or it may be wrapped around by the user before the one-day inspection and removed after the one-day inspection. Further, in this case, since it is possible to eliminate the work of expanding the endoscope insertion channel by using the dilator 10 and the dilation tube 17 when the cover is attached, the dilator 1
0 can be removed from the system, and the cost of the device can be reduced.

When the cover portion 18 of the insertion portion of the endoscope cover is formed of a tube having one lumen, it is not possible to remove the channel tube 45, the wire tube 49, and the air / water supply tubes provided inside the cover. Since it becomes difficult to insert the endoscope insertion portion 12 when inserting it, it is necessary to collect the tubes so as not to come apart. FIG. 7 shows a configuration example in which the conduit tubes provided in the insertion portion cover portion 18 are integrated together.

The first example of FIG. 7 (a) is a channel tube 45, a wire tube 49, an air / water supply tube 5
9 is inserted through the thin-walled tube 60, and these tubes are integrated and provided inside the insertion portion cover portion 18.

In the second example of FIG. 7 (b), like the first example, after inserting the tubes into the thin tube 60, the channel tube 45, the wire tube 49, and the air / water supply tubes 59 are separated. As described above, the thin-walled tubes 60 are aligned along the outer shape of the tube, and at a plurality of locations on the thin-walled tube 60, fixing portions 61 such as a stapler partially penetrate the combined portions of the thin-walled tubes 60 through the tubes on both sides. It has been fixed so. First
In the above example, the cross section of the thin-walled tube 60 is close to a circular shape, and the space for inserting the endoscope insertion part 12 into the insertion part cover part 18 is narrowed, or the insertion part cover part 18 is thick to secure the internal space. It may be the diameter,
In the case of the configuration as in the second example, the thin tube 60 can have a flat cross section by a simple means, and the space for inserting the endoscope insertion part 12 in the insertion part cover part 18 made of one lumen can be made large. It can be secured without becoming

FIG. 8 shows the configuration of the mouth part on the proximal side of the endoscope cover and the periphery of the operation part of the cover endoscope attached thereto. FIG. 8A shows a state in which the endoscope insertion section 12 is inserted into the insertion section cover section 18 and the mouth section 33 is attached to the endoscope operation section 13, and FIG. 8B is a mouth section. 33 shows the vicinity of the end portion of 33.

A wire tube 49 extends from the mouth portion 33 of the insertion portion cover portion 18, and a recess 62 is provided in a part of the outer peripheral portion of the end portion of the wire tube 49. A bending operation knob (not shown) is provided on a side portion of the endoscope operation section 13 and has a rotating shaft 63 provided on an upper portion thereof. The rotating shaft 63 serves as an operating member and is a disposable treatment instrument raising knob. 64 is rotatably attached.
In the vicinity of the rotating shaft 63, two pins 65 are provided as a restricting means so as to project at intervals smaller than the outer diameter of the wire tube 49. As shown in FIG.
The recess 62 of the wire tube 49 can be fitted to the pin 65 when the cover 8 is mounted on the cover endoscope 4. At this time, the end of the raising wire 48 inserted through the wire tube 49 is connected to the end of the treatment instrument raising knob 64.

The treatment instrument raising knob 64 has a hole 66 that fits into the rotating shaft 63, and the opening 6 is located laterally of the hole 66.
7 is provided and is attachable to and detachable from the rotating shaft 63. In the treatment instrument raising knob 64, a grip lever 68 is provided outside the end of the opening 67, and a hinge portion 69 having a narrowed outer shape is formed at the base end of the grip lever 68. Although the opening width of the opening 67 is slightly smaller than the outer diameter of the rotating shaft 63, the provision of the hinge 69 allows the treatment instrument raising knob 64 to be attached and detached by utilizing the elasticity of this portion. It is like this. In addition, the treatment instrument raising knob 64
In order to make it easier to attach / detach, the hinge portion 69 may be bent by the gripping lever 68 to widen the opening width of the opening portion 67 so that it can be attached / detached with a light force.

At the end of the mouth portion 33, as shown in FIG. 8B, the wire tube 49 is inserted into the insertion hole 70 provided in the mouth portion 33. Is not fixed and is movable in the axial direction. The wire tube 49 may be composed of a metallic pipe such as stainless steel used in a conventional endoscope, or
A metal contact coiled pipe, a fluorine resin tube, a resin tube made of polyethylene, polyimide, polypropylene or the like may be used.

In the cover type endoscope thus constructed, when the endoscope cover 3 is mounted on the cover endoscope 4, the endoscope insertion portion 12 is inserted into the insertion portion cover portion 18. The insertion section is inserted to cover the insertion section, and the mouth section 33 on the near side of the cover is attached to the endoscope operation section 13. And wire tube 4
The recessed portion 62 at the 9th end is fitted and fixed to the pin 65 of the endoscope operation portion 13, the treatment instrument raising knob 64 is attached to the rotating shaft 63, and the end portion of the raising wire 48 is raised. Connect to the upper knob 64.

Here, the wire tube 49 is connected to the mouth 3
Since it is not fixed with respect to 3, it is slidable in the insertion hole 70 of the mouth part 33. However, when the cover is attached, the recess 62 at the end of the wire tube 49 is fitted into the pin 65 of the endoscope operation section 13, whereby the position of the wire tube 49 in the wire axis direction can be regulated, and the treatment tool raising knob can be controlled. The wire tube 49 does not move together with the raising / lowering operation of 64, and only the raising wire 48 is pushed and pulled. As a result, a stable raising / lowering function can be secured.

Further, the recess 62 of the wire tube 49 and the pin 65 of the endoscope operation section with the endoscope cover attached.
With respect to the positional relationship with, for example, when the insertion portion is straight, the natural length of the wire tube 49 is set to be longer than the position of the pin 65, and the concave portion 62 is located further rearward than the pin 65. Is also good. In this case, the wire tube 49 is slightly pushed into the mouth 33 so that the recess 62 is fitted into the pin 65. As a result, the wire tube 49 becomes slightly slack in the insertion section cover 18, and even if the insertion section bends or bends, the wire tube 49 is not forcibly pulled, and the tube is damaged or the bending performance deteriorates. Can be prevented.

Even if the insertion length of the endoscope insertion portion 12 varies depending on the scope, the wire tube 49
If the recessed portion 62 is positioned rearward with respect to the pin 65 by the maximum variation amount or more, the amount of pushing the wire tube 49 into the mouth portion 33 when the endoscope cover is attached depends on the scope. Since the variation can be absorbed by just slightly changing it, the endoscope can be attached to any endoscope, and the same raising / lowering operation can be performed.

Therefore, according to the configuration of this embodiment,
Since it is not necessary to position and fix the wire tube to the mouth portion in order to secure the inversion function, the assembly process such as bonding can be omitted, the assemblability is good, and the assembly cost can be reduced.
Therefore, in a cover-type endoscope having a drive mechanism for a member at the tip of the endoscope cover such as a treatment instrument raising device, a stable raising / lowering function can be ensured, and with this configuration, the endoscope cover Etc. can be made cheaper. In addition, it is possible to deal with variations in the length of the endoscope insertion portion, and the same raising / lowering operation can always be performed.

9 to 11 relate to the second embodiment of the present invention, and FIG. 9 is an explanatory view showing the structure of the mouth part on the proximal side of the endoscope cover and the operation part of the cover endoscope. 10 is a cross-sectional view of the grip portion of the endoscope operating portion with the endoscope cover attached, and FIG. 11 is an explanatory diagram showing the configuration of the connecting portion between the treatment tool raising knob and the raising wire.

The second embodiment is a modification of the configurations of the endoscope operation section and the mouth section of the endoscope cover. here,
Only parts different from the first embodiment will be described.

As shown in FIGS. 9 (a) and 10, a guide groove 71 is provided on the side of the endoscope operation section 13, and when the insertion section cover section 18 is attached to the cover endoscope 4. A part of the wire tube 49 extending from the insertion portion cover portion is fitted into the guide groove 71. In this state, the end of the wire tube 49 is abutted against the groove end 72 which is the end of the guide groove 71.

A treatment tool raising knob 73 is rotatably attached to a rotating shaft 63 on which the bending operation knob of the endoscope operation section 13 is provided, and the raising wire 48 inserted through the wire tube 49. The ends of are connected.
The treatment instrument raising knob 73 is provided with an insertion hole 74 through which the raising wire 48 is inserted, and a fixing screw 75 screwed in the insertion hole 74 in a direction perpendicular to the insertion hole 74. In the inverted state, the end of the raising wire 48 has the insertion hole 7
4 and can be tightened and fixed by a fixing screw 75.

A finger contact portion 76 is detachably attached to the treatment instrument raising knob 73. The finger contact portion 76 is inserted into the accommodation hole 77 of the treatment instrument raising knob 73 and is frictionally held by the O-ring 78. A minus driver portion 79 is formed at the end of the finger contact portion 76. When the raising wire 48 is connected, the finger contact portion 76 is pulled out from the treatment instrument raising knob 73, and the minus driver portion 79 is fixed with a fixing screw. It is possible to engage with the minus groove portion 75a of the head portion of 75 and rotate the fixing screw 75 by the finger contact portion 76 to fix or loosen the raising wire 48 to the insertion hole 74 of the treatment instrument raising knob 73. Has become. In this way, the fixing operation member is lost by using the fixing operation member such as a flat-blade screwdriver used when fixing the raising wire to the treatment tool raising knob and the finger contact portion of the treatment tool raising knob. There is no fear, and since the configuration of the treatment instrument raising knob can be made small, it is possible to prevent the operation from being hindered and improve the operability.

At the end of the mouth body portion 33 of the insertion portion cover portion, the wire tube 49 is not fixed to the mouth body portion 33 as shown in FIG. 9B, and the wire tube 49 is different from the first embodiment. Differently, since the wire tube is engaged in the guide groove on the endoscope operation section side, the mouth portion 33 is not provided with a wire tube insertion hole, and the wire tube 49 is not provided in the mouth portion 33. It has a great deal of freedom.

FIG. 10 shows a cross section of the grip portion of the endoscope operation portion 13 when the operation portion cover portion 19 is attached to the structure shown in FIG. 9A.

The guide groove 71 of the endoscope operation section 13 is not so deep as to fit the entire wire tube 49, but is a shallow groove into which a part of the wire tube 49 is inserted. When the tube 49 is pressed by the operation portion cover portion 19, the tube is prevented from coming off the guide groove 71. A projecting portion 80 formed on the grip portion of the endoscope operating portion 13 by the wire tube 49.
Can also be used as a finger-holding part when gripping the operation part, and has a configuration that is easy to grip. The operation portion cover portion 19 may be a hard cover, a semi-rigid cover, or a soft cover.

FIG. 11 shows a modification of the structure of the fixing portion between the treatment tool raising knob and the raising wire.

The treatment instrument raising knob 81 is provided with an insertion hole 82 for inserting the raising wire, and the end of the raising wire 48 is inserted into the insertion hole 82. Also,
The treatment instrument raising knob 81 is provided with a slide hole 83 that communicates with the insertion hole 82, and a finger contact portion 84 is slidably inserted into the slide hole 83. Finger rest 84
A leaf spring 85 is attached to the side portion of the plate so that when the finger rest 84 is inserted into the slide hole 83, the finger rest 84 is frictionally held against the slide hole 83 by the urging force of the leaf spring 85. There is.

When connecting the raising wire 48, after the raising wire 48 is inserted into the insertion hole 82 of the treatment instrument raising knob 81, the finger pulled up as shown in FIG. 11 (a). The contact portion 84 is slid downward as shown in FIG. As a result, the raising wire 48 is bent by the finger contact portion 84 and, at the same time, the distal end portion of the wire is inserted into the slide hole 83 by the elastic force of the leaf spring 85, whereby the raising wire 48 is lifted by the knob. Fixed to 81.

In the configuration of this embodiment, the insertion portion cover portion 18
When the endoscope insertion part 12 is inserted into the inside and the mouth part 33 on the cover proximal side is attached to the endoscope operation part 13, the natural length of the wire tube 49 is, for example, a guide when the insertion part is straight. The length is such that the tube end surface is located rearward of the groove end portion 72 of the groove 71. When the raising wire 48 is connected to the treatment instrument raising knob 73, the wire tube 49 is fitted into the guide groove 71, and the wire tube 4 is inserted.
The end surface of the wire tube 9 is abutted against the groove end portion 72, and the wire tube 49 is slightly pushed into the insertion portion cover portion. As a result, even for scopes that have variations in the insertion length due to individual differences, the amount of variation can be absorbed by a slight difference in the amount to be pushed in depending on the scope. Is possible.

As described above, the end surface of the wire tube 49 abuts on the groove end portion 72, so that the wire tube 49
Position of the wire in the wire axis direction can be regulated, and the treatment tool raising knob 64
The wire tube 49 does not move together with the above operation, and only the raising wire 48 is pushed and pulled.

In the structure provided with the guide groove 71 as in the present embodiment, the wire tube 49 can be prevented from moving at all in the pulling-up operation, but in the pushing-up operation. The wire tube 49 may move slightly. To prevent this, for example, in FIG.
As shown in FIG. 9B, the insertion hole 70 is provided in the mouth portion 33, the wire tube 49 is inserted through the insertion hole 70, and the wire tube 49 is screwed with a part of the insertion hole 70 from the state of FIG. 9A. You may make it fixed, for example.

According to the structure of the present embodiment, in the same manner as in the first embodiment, in the cover type endoscope having the drive mechanism for the member at the distal end portion of the endoscope cover such as the treatment instrument raising device, the stable raising is possible. It is possible to configure the endoscope cover and the like at low cost while ensuring the up / down function. Further, in this embodiment, since it is not necessary to specially process the end portion of the wire tube, the cost of the cover can be further reduced as compared with the first embodiment.

Next, FIG. 12 shows a modification of the structure of the connecting and fixing portion between the end portion of the wire tube and the endoscope operating portion.

In the first modified example of FIG. 12 (a), a pair of acute angle pins 86 in which sharply pointed sharp heads are arranged to face each other in the endoscope operation section are shown in FIG. 8 (a). It is provided in place of the pin 65 shown, and the end of the wire tube 49a is sandwiched and fixed between the acute angle pins 86. A line mark 87 for positioning is provided at a predetermined position at the end of the wire tube 49a. The distance between the pair of acute angle pins 86 is set to be slightly smaller than the outer diameter of the wire tube 49a.

In this structure, when the wire tube 49a is fixed, the line mark 87 at the end of the wire tube 49a is pushed between the pair of acute angle pins 86,
The wire tube 49 is fixed by being bitten by the acute-angle pin 86 so as to cut a part of the wire tube.

In the second modified example of FIG. 12B, a fixing base 88 for receiving the side surface of the wire tube 49a is attached to the endoscope operating portion, and a female screw is formed inside the fixing base 88 facing the fixing base 88. And a fixing member 90 having a set screw 89,
The wire tube 4 is provided between the fixing base 88 and the fixing member 90.
The end of 9a is engaged and fastened by a set screw 89.

With this structure, when the wire tube 49a is fixed, the end of the wire tube 49a is positioned so that the line mark 87 is located at the head of the set screw 89, and the set screw 89 is rotated to rotate the wire tube 49a. Tighten and fix from the side of 49a.

According to these modified examples, without special processing such as forming a recess at the end of the wire tube,
Move the wire tube back and forth with respect to the endoscope operation section (axial direction)
Can be fixed so as not to move to.

Here, another example of the construction of the operation section cover section for covering the endoscope operation section is shown in FIGS.

The operation portion cover portion 91 of the first configuration example shown in FIG. 13 is formed of a soft cover that is formed sufficiently larger than the outer shape of the endoscope operation portion 13 and is provided at the cover end portion. The rubber rings 92a and 92b are watertightly attached to the mouth body portion 33 and the universal cord 14 of the insertion portion cover portion to cover the endoscope operation portion 13. Further, a rubber ring 93 is provided in an intermediate portion of the operation portion cover portion 91, and an opening portion 95 into which a user's hand 94 can be inserted is formed in the rubber ring 93.

The operation portion cover portion 96 of the second configuration example shown in FIG. 14 is a modification of the first example, and instead of the opening portion 95 in FIG. 13, it is made of a rubber material or vinyl or the like. A glove 97 is provided, and a user's hand can be inserted into the glove 97 to operate the endoscope.

In the cover type endoscope using the operation section cover section having these configurations, the user enters the operation section cover section through the opening 95 in the first example and the glove 97 in the second example. It is possible to operate the endoscope operation unit 13 by putting a hand. When the operation is performed from the operation portion cover, it may be difficult to operate the bending knob, the processing tool raising knob, and other switches, but FIG. 13 or FIG.
According to the operation section cover section having the structure of 4, it is possible to perform an operation with substantially the same operation feeling as a general endoscope that is not a cover type.

The present invention is not limited to the drive mechanism for the treatment instrument raising member of the endoscope cover shown in the above embodiment, but the driven member provided at the tip of the cover may be a member other than the treatment instrument raising member. A liquid tube, a wiper for wiping the cover glass, or the like may be used, and the same configuration can be applied to the operation wires of the drive mechanism of these driven members.

[0071]

As described above, according to the present invention, a device having a drive mechanism for a member at the distal end of an endoscope cover, such as a treatment instrument raising device for raising a treatment instrument inserted in a channel, There is an effect that the operating function of the drive mechanism can be ensured and the cost can be reduced.

[Brief description of drawings]

1 to 8 relate to a first embodiment of the present invention,
FIG. 1 is an explanatory diagram showing the entire configuration of an endoscope apparatus of an endoscope cover system.

FIG. 2 is a perspective view showing a configuration of an insertion portion cover portion of the endoscope cover.

FIG. 3 is a perspective view showing a state in which the endoscope cover is attached to the cover endoscope.

FIG. 4 is a perspective view showing a configuration of a distal end portion of an endoscope cover.

FIG. 5 is a cross-sectional view showing the configuration of the tip portion of the endoscope cover.

FIG. 6 is a perspective view showing an external configuration example of an insertion portion of a cover endoscope to be inserted into an endoscope cover.

FIG. 7 is a perspective view showing a configuration example of a conduit tube provided in an endoscope cover.

FIG. 8 is an explanatory view showing a configuration around a mouth part on the near side of the endoscope cover and an operation part of the cover endoscope.

9 to 11 relate to a second embodiment of the present invention, and FIG. 9 is an explanatory view showing a configuration around a mouth portion on a near side of an endoscope cover and an operation portion of a cover endoscope.

FIG. 10 is a cross-sectional view of the grip portion of the endoscope operation section with the endoscope cover attached.

FIG. 11 is an explanatory view showing a configuration of a connecting portion between the treatment tool raising knob and the raising wire.

FIG. 12 is an explanatory view showing a modified example of the configuration of the connection fixing portion between the wire tube end portion and the endoscope operating portion.

FIG. 13 is an explanatory diagram showing a first configuration example of an operation section cover section that covers the endoscope operation section.

FIG. 14 is an explanatory diagram showing a second configuration example of the operation section cover section that covers the endoscope operation section.

FIG. 15 is a cross-sectional view showing a configuration example in the vicinity of a cover proximal side mouth portion in a cover-type endoscope including a treatment instrument raising device that raises a distal end portion of a treatment instrument inserted in a treatment instrument channel.

[Explanation of symbols]

 2 ... Cover type endoscope 3 ... Endoscope cover 4 ... Cover endoscope 12 ... Endoscope insertion part 13 ... Endoscope operation part 18 ... Insertion part cover part 33 ... Mouth part 48 ... Raising wire 49 ... Wire tube 62 ... Recessed portion 64 ... Treatment instrument raising knob 65 ... Pin 70 ... Insertion hole

Claims (1)

[Claims] 1. An endoscope apparatus of an endoscope cover type having an endoscope and an endoscope cover that covers at least the insertion portion of the endoscope, wherein a tip portion of the insertion portion of the endoscope cover. A driven member provided at the end of the endoscope cover, one end of which is connected to the driven member and the other end of which is extended toward the insertion portion of the endoscope cover to move the driven member. A guide member that is provided on a mirror cover and that guides the transmission member, and an operation member that is provided on an operation portion on the proximal end side of the insertion portion of the endoscope and that is connected to the transmission member to drive and operate the driven member. An endoscope cover-type endoscope apparatus comprising: an endoscope cover-type endoscope; and a regulation unit that regulates axial movement of the guide member in the operation section of the endoscope.