JPH07303598A - Endoscope cover - Google Patents

Abstract

PURPOSE:To provide an endoscope cover whose cost is reduced by attaining a cheap structure to be made disposable after one time use and which can make a head bending operation power small when it is combined with an endoscope. CONSTITUTION:A channel duct 29 is arranged in parallel with an endoscope inserting part 14 in the inserting part cover part 22 of a cover 3, and this channel duct 29 is composed of the first ductal cavity member 31 whose head is fixed to a head cover part 16 and the second ductal cavity member 32 whose rear end is fixed to a mouth body part 30. As this end part of the first ductal cavity member 31 is slidably fitted to the head part of the second ductal cavity member 32, the length change of the duct 29 accompanying bending is absorbed and a load is not imposed to the bending power volume. And as the ductal cavity member has its simple constitution by fitting of two ductal cavity members, its cost is cheap even used as a material disposed after one time use and it can be disposed after one time use.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an endoscope cover for covering an endoscope.

[0002]

2. Description of the Related Art Heretofore, there has been proposed a cover-type endoscope which covers and uses a cover including a lumen member such as a channel. In USP 4,947,827, in this cover-type endoscope, an endoscope having a bending mechanism at the tip and a lumen member juxtaposed to the endoscope are fixed at the tip and inserted. It discloses a configuration in which the lumen member expands and contracts according to the bending operation of the portion. That is, the channel tube is provided with pleats that can expand and contract, and a coil member that regulates contraction in the radial direction.

Regarding the lumen member arranged in the flexible tube of the endoscope, Japanese Utility Model Publication No. 58-20241 discloses the following structure. In this lumen member, the respective ends of the conduit forming tube fixed to the distal end of the endoscope insertion section and the conduit forming tube fixed to the operating section are connected by an elastic thin-walled skin tube. It is a thing.

[0004]

[Problems to be Solved by the Invention] USP 4,947,8
The configuration disclosed in Japanese Patent No. 27 absorbs a change in length between the channel tube and the endoscope caused by bending or the like due to expansion and contraction in the axial direction due to elastic deformation of the channel tube. Since the tube expands and contracts, the amount of operating force required for the bending operation naturally increases by the elastic force of the channel tube. In particular, as described in this prior art, when a resin having elasticity is generally used for the channel tube, the hardness of the resin that affects the ease of expansion and contraction and the surface of the resin that affects the insertion / removal operation of the treatment tool. It is necessary to consider slipperiness. It is currently difficult to select a resin that satisfies both hardness and slipperiness.

In addition, as the channel tube expands and contracts, the cost of the disposable channel tube is reduced by pleating the tube or disposing a coil member for restricting radial deformation when expanded. It will be greatly raised. In other words, it becomes uneconomical.

In Japanese Utility Model Publication No. 58-20241, a conduit forming tube connected to the distal end side of the endoscope insertion portion and a conduit forming tube connected to the operating portion are connected in a flexible tube. ing. However, since the conduit forming tube is disposed inside the flexible tube, this conduit is washed and disinfected and used repeatedly.

At this time, the sliding or expanding / contracting connecting portions of the two conducting pipe forming pipes cannot be sufficiently washed and sterilized between the pipes or the contact portion between the pipes and the thin skin tube made of an elastic material. However, there is a drawback in that cleaning here is troublesome and troublesome.

The present invention has been made in view of the above circumstances, and it is possible to reduce the cost with a simple structure and make it disposable, and to reduce the bending operation force of the distal end when combined with an endoscope. It is intended to provide an endoscope cover that can be used.

[0009]

According to the present invention, an endoscope including an insertion portion having a bendable bending portion and a flexible tube portion is inserted from a proximal end portion toward a distal end portion, and the insertion portion is inserted. At least one that is arranged substantially in parallel with the endoscope insertion part
In an endoscope cover including one or more lumen members and including a flexible insertion portion cover portion, the lumen member includes a first lumen member having a tip disposed at the tip portion. A second lumen member whose proximal end is arranged at the proximal end, and a proximal end of the first lumen member and the second lumen member. The tip part is slidably fitted.

[0010]

In the configuration of the above invention, the lumen member arranged in parallel with the endoscope in the insertion portion cover portion is provided with the first lumen member and the second lumen along with the bending operation of the endoscope bending portion. By slidably fitting with the member, it is possible to absorb the change in the length of the lumen member in the longitudinal direction due to the bending and not to burden the bending operation force.

Further, in the above-mentioned structure of the present invention, the lumen member arranged in the insertion portion cover portion has a simple structure by fitting the two lumen members, and thus the cost is low as a disposable and the disposable. This saves the trouble of cleaning.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 5 relate to a first embodiment of the present invention, FIG. 1 is an overall configuration diagram of an endoscope apparatus of an endoscope cover system, and FIG. 2 is a front side of an insertion portion of a cover endoscope. 4 is a cross-sectional view, and FIG. 3 is a cross-sectional view of the distal end side of the insertion portion when bending upward.
Is a cross-sectional view of the distal end side of the insertion portion when bending downward, FIG.
It is sectional drawing which shows the mode of connection of a 2nd pipeline member.

As shown in FIG. 1, an endoscope cover type endoscope apparatus 1 is an apparatus having an endoscope cover type endoscope (hereinafter referred to as a cover type endoscope) 2.

The cover type endoscope 2 includes an endoscope cover (hereinafter abbreviated as a cover) 3 and an endoscope cover endoscope mounted on the cover 3 (hereinafter abbreviated as an endoscope). Yes) 4 combined. When performing an endoscopic examination, the clean cover 3 covers the insertion portion and the like of the endoscope 4, and the cover 3 is discarded after the examination.

On the other hand, the endoscope 4 has a new clean cover 3
It is characterized by being covered by 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 to which the cover-type endoscope 2 is connected are installed, and the cover-type endoscope 2.
And a cover holder 6 for holding.

The cart 5 has, 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 extender) used when the cover endoscope 4 is attached to the cover 3. 10) etc. are stored.
A video processor 8 is provided on the top surface of the cart 5.
A monitor 11 for receiving an image signal from the monitor and displaying an endoscopic image is mounted thereon.

In the endoscope 4, an operation portion 12 also serving as a large-diameter grip portion is continuously provided at a proximal end portion of a proximal side of an elongated endoscope insertion portion 14, and a universal cord 13 extends from the operation portion 12. ing. A connector 19 is provided at the end of the universal cord 13.

The light source device 7 is detachably connected to the cover endoscope 4 through the connector 19 and supplies illumination light to the endoscope. The video processor 8 is detachably connected to the cover endoscope 4 via a signal cable 21 extending from the side portion of the connector 19, and drives the image pickup means built in the endoscope 4, and The signal output from the image pickup means is subjected to signal processing, converted into a standard video signal, and output to the monitor 11.

The expansion device 10 is connected to an expansion tube 34, and is for expanding air by sending air into the cover 3 through the expansion tube 34, and the expansion of the cover 3 causes the endoscope 4 to move. Can be easily attached or removed. When the cover 3 is attached to or detached from the endoscope 4, the cover holder 6 is used.
For example, the base end side is held by the cover holder 6, and the endoscope 4 is inserted or withdrawn.

The cover 3 has a flexible insertion portion cover portion 22.
And a universal cord cover portion 24 and an operation portion cover portion 23 made of a thin and soft polymer material such as vinyl chloride. The insertion section cover section 22, the operation section cover section 23, and the universal code cover section 24 respectively cover the endoscope insertion section 14, the operation section 12, and the universal code 13 of the endoscope 4.

The fluid control device 9 is provided with an air supply control valve 35, a water supply control valve 36, and a suction control valve 37, and supplies air, water,
The suction is controlled by these solenoid valves. The air supply control valve 35, the water supply control valve 36, and the suction control valve 37 are connected to an air supply pipe line 26, a water supply pipe line 27, and a suction pipe line 28 extending from the insertion section cover portion 22, respectively.

The suction control valve 37 has a suction tube 3
8 is connected, and an aspirator (not shown) is connected to the end portion of the endoscope 8 so that unnecessary body fluid or the like is sucked from the distal end portion of the endoscope. A water supply tube 39 is connected to the water supply control valve 36, and a water supply tank 33 is connected to the tip of the water supply tube 39. Further, two air supply tubes 40 extend from the fluid control device 9 and are connected to the air supply control valve 35 and the water supply tank 33.

Next, the structure of the insertion portion cover portion 22 will be described. As shown in FIG. 2, the insertion portion cover portion 22
Has a disposable channel conduit 29, and the endoscope 4 can be mounted at a position parallel to this conduit 29, so that the bending operation of the endoscope 4 can be lightened. .

In the insertion section cover section 22, the distal end cover section 16 is connected to one end of the flexible cover sheath 15, and the endoscope insertion section 14 is inserted in parallel with the channel conduit 29 provided in the cover sheath 15. It is supposed to be done.
The tip portion 17 of the endoscope insertion portion 14 is fitted and fixed to the tip cover portion 16. Endoscope insertion part 14
Has a bending portion 18 that can be bent behind the tip portion 17.

The channel conduit 29 is connected and fixed to a first conduit member 31 that is connected and fixed to the distal end cover portion 16 and a forceps port (not shown) on the proximal side of the insertion portion cover portion 22 and has an outer diameter. The first conduit member 31 has a second conduit member 32 having an inner diameter substantially equal to that of the first conduit member 31. First conduit member 31
The second conduit member 32 and the second conduit member 32 are slidably fitted and connected in the vicinity of a position corresponding to the rear end of the bending portion 18 of the endoscope insertion portion 14, and the connecting portion 29a includes A thin lumen member 41 made of a flexible and highly stretchable resin material is coated. As shown in FIG. 5, both ends of the thin lumen member 41 are airtightly bonded and fixed to the first lumen member 31 and the second lumen member 32.

The first lumen member 31 is made of a flexible material having a relatively low hardness, such as a porous fluororesin or a polyurethane having an A hardness of 60 to 70 °. Alternatively, vinyl chloride may be used.
The second lumen member 32 is made of a material having a relatively high hardness and a high slip property on the resin surface. For example, a fluorine resin, polyethylene, polyester, or A hardness in the range of 80 to 100 °. Polyurethane, etc. defined by Further, as the thin-walled conduit member 41, a flexible resin such as silicone, polyurethane or vinyl chloride can be considered.

Although the second lumen member 32 is not shown in detail, the suction conduit 28 is branched and extended in the vicinity of the forceps port to be connected, and the second lumen member 32 is provided in the vicinity of the operation portion, the universal cord, the connector portion and the like. Connected as a separate tube.

Suction line 2 led out of the mouth 30
8, and the air supply conduit 26 and the water supply conduit 27 that are provided together with the channel conduit 29 in the insertion portion cover portion 22, as shown in FIG.
And is connected to the fluid device 9 while being fixed on the universal cord 24 with the adhesive tape 20.

Alternatively, the suction line 28 and the air supply line 2
As shown in FIG. 7, the water supply conduit 6 and the water supply conduit 27 may be fixed on the operation portion cover 23 by the adhesive tape 20.

The operation of the first embodiment will be described with reference to FIGS. 3 and 4. The bending portion 18 of the endoscope 4 inserted into the insertion portion cover portion 22 performs a bending operation within a predetermined angle range in accordance with the rotation of the bending operation knob (not shown) on the proximal operation portion. At this time, as shown in FIGS. 3 and 4, the bending portion 18 of the endoscope 4 is configured to bend at the same angle in opposite directions. However, channel line 2
When the insertion portion cover portion 22 is mounted so that 9 is arranged in parallel with the bending portion 18 of the endoscope 4, the channel conduit 29
The length in the axial direction changes depending on whether the curved shape is on the outside or inside of the curved shape.

In the upward bending shown in FIG. 3, since the channel conduit 29 is located outside the curve, a load is applied to the conduit 29 in the direction in which the conduit length becomes longer. At this time, in the channel conduit 29 of the present embodiment, the connecting portion 29a between the first conduit member 31 and the second conduit member 32 slides so that the rear end portion of the first conduit member 31 moves. Move forward.

In the downward bending shown in FIG. 4, since the channel conduit 29 is located inside the curve, a load is applied to shorten the conduit, so that the sliding of the connecting portion 29a causes the first conduit member to slide. The rear end of 31 moves rearward.

When the first conduit member 31 and the second conduit member 32 slide as described above, the ends of both conduits are separated when they are on the outer side as shown in FIG. The fitting length is set so as not to connect. Also, FIG.
Although not shown in FIG. 4, the thin conduit member 41 covered by the connecting portion 29a expands and contracts in response to sliding and maintains the airtightness between the lumen of the channel conduit 29 and the inside of the insert portion cover 22. have. This conduit member 41 is not only formed into a bag shape as in the illustrated example, but is also formed with a bellows along the conduit member to enhance elasticity and reduce interference with other internal components. May be.

In the present embodiment, even if the bending portion 18 of the endoscope insertion portion 14 provided along with the channel conduit 29 performs a bending operation so that the channel conduit 29 is located on the outside or inside, the local portion of the bending operation is locally generated. Channel line 2 due to large bending at
The change in the length of 9 is absorbed by the sliding of the first conduit member 31 and the second conduit member 32 in the vicinity of the rear end of the curved portion 18. Therefore, in this embodiment, the channel conduit 29 is not loaded, and as a result, the bending operation force amount can be reduced. It should be noted that the same effect can be obtained even if the connecting portion is provided on the hand side by a predetermined distance from the vicinity of the curved portion.

The sliding position of the connecting portion 29a is 30 to 50 mm from the rear end of the bending portion 18 which is the maximum outer diameter portion of the endoscope.
If it is arranged on the hand side and the sliding distance is 20 to 30 mm, it is desirable that the connecting portion 29a has a fitting length of about 40 mm.

Further, the first conduit member 31 is made of a flexible material and the second conduit member 32 is made of a relatively hard material having a good slip property, so that the channel conduit corresponding to the tip curved portion 18 is formed. The effect of reducing the amount of insertion / removal of the treatment tool can be expected while preventing the collapse of 29 and further reducing the amount of bending operation force.

As a modified example of this embodiment, except for the thin conduit member 41, a part of the first lumen member 31A is formed in a corrugated shape as shown in FIG. 8A, and FIG. As shown in (b), the corrugated first conduit member 31B having a different wall thickness may be used instead. With these configurations, it is difficult to be crushed by the force applied in the radial direction of the conduit when the pipe is bent, and the diameter of the conduit can be maintained.

FIG. 9 is a block diagram showing the essential parts of a cover according to the second embodiment of the present invention. The configuration of this embodiment differs from the configuration of the first embodiment in the following points. In the first embodiment, one using two lumen members in which the inner diameter of the first lumen member 31 and the outer diameter of the second lumen member 32 are substantially equal to each other is used. On the other hand, in the present embodiment, as shown in FIG. 9, two lumen members having the same inner diameter and outer diameter are used, and the first lumen member 31 'has only the inner diameter of the rear end portion, The outer diameter of the second conduit member 32 is substantially equal to the outer diameter of the second conduit member 32. For the first lumen member 31 ', a cored bar having a predetermined outer diameter is press-fitted and thermoformed, or conversely, the tip cover 16 is used.
The inner and outer diameters can be reduced by the extension process from the portion connected to the end of the connecting portion 29b.
Alternatively, in this embodiment, it is conceivable to join lumen members having different inner diameters.

In this embodiment, in addition to the effects of the first embodiment, it is possible to reduce the diameter of the first conduit member 31 'that is provided side by side from the tip cover portion 16 to the curved portion 18. is there.

FIG. 10 is a constitutional view showing a main part of a cover according to the third embodiment of the present invention. The configuration of this embodiment differs from the configuration of the first embodiment in the following points. In the first embodiment, the inner diameters of the first and second lumen members 31 and 32 are different from each other, but in this embodiment, as shown in FIG. 10, two lumen members having the same inner diameter and outer diameter are used. 31C and 32C are used. The proximal end of the first lumen member 31C and the distal end of the second lumen member 32C are arranged so as to be able to move forward and backward within a hard pipe 41C that is airtightly fitted. The rest of the configuration, functions and effects are the same as those of the first embodiment, and the explanation is omitted.

FIG. 11 is a perspective view of an insertion portion cover portion in which an endoscope is inserted according to the fourth embodiment of the present invention.

The insertion portion cover portion 22A shown in FIG.
Replaces the cover sheath 15 of the first embodiment with a lumen into which the endoscope insertion section 14 is inserted and a channel conduit 29.
And a double lumen tube 25 having a lumen through which the air supply conduit 26 and the water supply conduit 27 are inserted.
Further, as in the case of the first embodiment, a channel conduit 29 formed by slidably fitting a first conduit member 31 and a second lumen member 32 is provided. In this case, although not shown, the lumen of the double lumen tube 25, through which the channel conduit 29 is inserted, is airtight with respect to the lumen into which the endoscope insertion portion 14 is inserted, at least in the insertion portion inserted into the body cavity. It has a structure. Therefore, it is not necessary to make airtight at the fitting portion between the first lumen member 31 and the second lumen member 32, and the thin lumen member 41 made of the elastic material described in the first embodiment is used. Is unnecessary. The cross-sectional shape of the endoscope insertion portion 14 is formed into a substantially D shape. Other configurations and operations similar to those of the first embodiment are designated by the same reference numerals and description thereof will be omitted.

In this embodiment, in addition to the effect of the first embodiment, since the lumen member 41 is unnecessary, the bending portion 1
It is possible to reduce the outer diameter in the vicinity of the rear end of No. 8.

12 and 13 relate to the fifth embodiment, FIG. 12 is a perspective view of a cover type endoscope, and FIG. 13 is a perspective sectional view showing an internal structure of a pipe line and the like.

In the cover type endoscope 2B shown in FIG. 12, the channel conduit and the endoscope insertion portion 14 are juxtaposed in a flexible cover sheath to prevent the channel conduit from being crushed or buckled. It is configured so that it can be prevented. Other configurations and operations similar to those of the first embodiment are designated by the same reference numerals and description thereof will be omitted.

As shown in FIG. 13, the insertion portion cover portion 22B combined with the endoscope insertion portion 14 is connected to the cover sheath 15 made of a flexible resin and the channel conduit 29 provided in the cover sheath 15. It is mainly composed of a trachea line 26 and a water supply line 27. The channel conduit 29, the air supply conduit 26, and the water supply conduit 27 are covered by a flexible and thin conduit covering member 42 over the entire length so that the three conduit tubes are arranged in parallel. .

In the tube covering member 42, a spiral coil member 43 made of a thin elastic plate material is fitted to the tube forming the channel tube 29, and the channel tube 29 is The coil member 43 can be slid.

With the above structure, the insertion portion cover portion 22B and the endoscope insertion portion 14 are combined and bent into an arbitrary shape as shown in FIG. Further, when the distal end of the insertion portion is bent, the channel conduit 29 forms the air supply conduit 26 and the water supply conduit 27 in the insert cover 22B.
The tube of the book receives a load that moves in the axial direction with respect to the endoscope insertion portion 14. At this time, the duct member forming the channel duct 29 has a predetermined clearance between the coil member 43 and the outer periphery of the duct member. It is possible to smoothly slide and move without receiving resistance due to the contact pressure.

At this time, the air supply conduit 26 and the water supply conduit 27
The outer diameter of the tube forming the
Since it is relatively thin with respect to the pipe line member forming the above, there is a clearance with the pipe line covering member 42, so that the pipe line member can be smoothly moved with respect to the load.

In the present embodiment, by fitting the coil member 43 in the tube forming the channel conduit 29, it is possible to move smoothly with respect to the axial load received by the conduit member. Therefore, in this embodiment, when the insertion portion is bent into an arbitrary shape or the distal end is bent, the channel conduit 29 can be prevented from being crushed or buckled by the axial load.

With this construction, the insertion portion in which the insertion portion cover portion 22B and the endoscope insertion portion 14 are combined does not collapse the channel duct 29 even when the operator grips it, and the insertion portion of the treatment instrument is prevented. The insertion can be smoothly performed.

In the above, the coil member 43 is fitted only to the conduit member forming the channel conduit 29, but it may be modified as shown in FIG. In this modified example, three tubes including the air supply conduit 26, the water supply conduit 27, and the channel conduit 29 are inserted into a coil member 43C having an elastic plate material having a spiral structure with a modified cross section. You can expect an effect.

The coil member may be made of a plate material having elasticity, and may be made of metal or resin. Further, the shape is not limited to the spiral coil, and a plurality of pieces 44 like the modified example shown in FIG. 16 may be formed and connected by a wire rod. As shown in FIG. 16, three holes are provided in each piece 44, and a metal wire 45 having a high rigidity against axial load is used in the hole in the central portion, and both sides thereof have elasticity. Each piece 44 is fixed to the wire using a wire 46 made of a rubber-like elastic material. As shown in FIG. 15, the conduits 26, 27, 29 are inserted into the conduit composed of the pieces 44 connected in series.

17 to 20 relate to the sixth embodiment,
17 is a perspective view of the distal end of the endoscope insertion portion, FIG. 18 is a perspective view showing the internal structure of the insertion portion cover portion, and FIG. 19 is an explanation showing the situation in which the endoscope is inserted into the cover portion and fitted therein. Figure, Figure 2
Reference numeral 0 is a cross-sectional view showing a state in which the mounting of the endoscope on the cover portion is completed. In the configuration shown in FIG. 17 and the like, an endoscope having an insertion portion with a round cross section in the insertion portion cover portion can be easily and surely attached. Other configurations and operations similar to those of the first embodiment are designated by the same reference numerals and description thereof will be omitted.

As shown in FIG. 19, the insertion portion cover portion 22
The distal end portion 17D of the endoscope insertion portion 14D inserted in D is
It is composed of a cylindrical tip member 50 having a circular cross section shown in FIG. 17, and a protrusion 51 is provided at a predetermined position on the side portion thereof. In the illustrated example, the protrusion 51 is in the vicinity of the objective lens 55 arranged on the front surface of the tip portion 17D, and the tip portion 1
It is projected on the outer circumference of 7D.

Further, the inside of the tip cover 16D of the insertion section cover 22D into which the endoscope tip 17D is fitted is shown in FIG.
As shown in FIG. 7, a front fitting portion 52 is formed on the distal end side of the distal end cover 16D with an inner diameter that allows the endoscope distal end member 50 to be fitted with an outer diameter that does not include the protrusion 51. Further, the tip cover 16D is provided, behind the front fitting portion 52, with a rear fitting portion 53 having an inner diameter that allows fitting even with the outer shape including the projection 51 of the endoscope tip member 50. . At the boundary between the front fitting portion 52 and the rear fitting portion 53, a guide step 54 having a different inner diameter is formed.

The guide step 54 is formed obliquely toward the front side in the axial direction so that the axial length of the front fitting portion 52 becomes the shortest at a predetermined position in the circumferential direction.
In the example shown in FIG. 19, the rear fitting portion 53 is formed obliquely so as to widen in the axial front direction according to the concave portion 57 corresponding to the objective lens cover 56 from a position approximately 180 degrees from the concave portion 57. Has been done.

In this structure, the protrusion 51 and the recess 57
May be located at arbitrary positions in the circumferential direction, but they need to be arranged so as to maintain a proper facing state when the mounting is completed. Further, the point 54a located at the most tip end in the direction toward the tip end along the axial direction of the guide step 54 is the concave portion 5.
It may be formed so as to match 7.

Further, in the tip cover 16D, with the endoscope tip member 50 fixed at a predetermined position, a recess 57 shown in FIG. Are formed.

In the above structure, the endoscope insertion portion 1 having a circular cross section.
When inserting 4D into the insertion portion cover portion 22D, the endoscope insertion portion 14D is inserted from the proximal side of the insertion portion cover portion 22D. Therefore, the respective tips of the insertion portion 14D and the cover portion 22D may not coincide with each other in the predetermined circumferential direction.
If they match, the objective lens 55 and the objective lens cover 5
6 correctly faces.

In particular, since the insertion portion cover portion 22D is composed of the flexible cover sheath 15, the distal end cover 16D may be easily twisted to some extent with respect to the hand side during insertion. Then, as shown in FIG. 19, the endoscope distal end 17D may be inserted without a predetermined circumferential position being aligned. In this case, the endoscope tip 17D is first fitted into the rear fitting portion 53 in the tip cover 16D, and when the insertion proceeds, the projection 51 provided on the endoscope tip member 50 has the guide step 54 in the tip cover 16D. Abutting any position. Then, when a load to be inserted into the endoscope insertion portion 14D is applied, a force is applied in the circumferential direction to the projection 51 that abuts on the guide step 54, and the endoscope tip member 50 is circumferentially predetermined with respect to the tip cover 16D. Rotate until the position is reached.

In FIG. 19, the projection 51 provided on the objective lens 55 side of the endoscope tip 17D is the tip cover 1
It rotates until it reaches a predetermined position facing the objective lens cover 56 in 6D. Upon arrival, the objective lens 55
And the objective lens cover 56 coincide with each other in the circumferential direction.

The guide step 5 formed obliquely in this way
As the protrusion 51 slides along the direction 4, the insertion portion cover portion 22D is fitted in the endoscope distal end 17D in a predetermined circumferential direction, and the protrusion 51 is further pushed in as shown in FIG. It gets over and is fitted and fixed in the recess 57 in the tip cover 16D. By this fitting and fixing, the endoscope distal end 17D can be reliably fixed to the cover 22D without shifting due to the axial load during use.

By adopting the above-mentioned configuration in this embodiment, when the endoscope is inserted into the endoscope cover, it is possible to easily and surely align the distal end of the endoscope with the predetermined rotational position of the endoscope cover. As a result, the endoscope cover can be attached in a shorter time.

[Supplementary Note 1] In the endoscope cover according to the first aspect, the first lumen member is fixed at a distal end portion of the insertion portion cover portion.

[Appendix 1-1] An endoscope having an insertion portion having a bendable bending portion and a flexible tube portion is inserted from a proximal end portion toward a distal end portion, and the inserted endoscope is inserted. In an endoscope cover including at least one or more lumen members arranged substantially in parallel with a mirror insertion part and including a flexible insertion part cover part, the lumen member is provided at the tip part thereof. A first lumen member having a distal end disposed therein and a second lumen member having a proximal end disposed at the proximal end, and a proximal end of the first lumen member. The side end portion and the tip end portion of the second lumen member are configured to relatively advance and retreat.

[Supplementary Note 1-2] In the endoscope cover according to the first aspect, the lumen member is provided with an opening of an end portion of the first lumen member on the proximal side of the second lumen member. The tip is slidably fitted.

[Supplementary Note 1-3] In the endoscope cover according to the first aspect, the wall thickness of the first lumen member in the vicinity of the proximal end is changed so that it is hard to be deformed in the radial direction. hand,
It has a wavy shape.

[Appendix 1-4] In the endoscope cover according to claim 1, the first lumen member is formed in a bellows shape in the vicinity of the proximal end so as not to be easily deformed in the radial direction. .

[Supplementary Note 2] In the endoscope cover according to the first aspect, the lumen members are slidable in the vicinity of the proximal end of the curved portion of the endoscope insertion portions arranged in parallel. Is fitted to.

[Supplementary Note 3] In the endoscope cover according to the first aspect, the lumen members are further at a predetermined distance from the proximal end of the curved portion of the endoscope insertion portions arranged in parallel. On the side, it is slidably fitted.

[Supplementary Note 4] In the endoscope cover according to the first aspect, the second lumen member is fixed on the proximal side of the insertion section cover section.

[Supplementary Note 5] In the endoscope cover according to the first aspect, the second lumen member can be connected and fixed to a separate lumen member in the vicinity of the proximal end. .

[Supplementary Note 6] In the endoscope cover according to the first aspect of the present invention, the second lumen member extends from the proximal end portion so as to be connectable to another device or member.

[Supplementary Note 7] In the endoscope cover according to the first aspect, the second lumen member is fixed to a flexible tube covering member connected to the light source device of the endoscope.

[Supplementary Note 8] In the endoscope cover according to Supplementary Note 6, there is provided an operation portion cover portion for covering an endoscope operation portion connected to the endoscope insertion portion, and the second lumen member. The extended portion is fixed to the operation portion cover portion.

In the configurations described in appendices 2 to 8, the lumen member provided in parallel with the endoscope in the cover is moved by the bending operation of the endoscope bending portion, so that the first lumen member and the second lumen member are provided. Since the cavity member is slidably fitted, the amount of bending operation force can be reduced. in addition,
The amount of bending operation force of the distal bending portion can be reduced by providing the treatment instrument with slipperiness when the treatment instrument is inserted into and removed from the lumen member.

[Supplementary Note 9] In the endoscope cover of the first aspect, the first lumen member and the second lumen member have different flexibility.

[Supplementary Note 10] In the endoscope cover according to Supplementary Note 9, the first lumen member and the second lumen member are made of different materials.

[Supplementary Note 11] In the endoscope cover according to Supplementary Note 9, at least the fitting portions of the first lumen member and the second lumen member are formed to have different wall thicknesses. There is.

[Supplementary Note 12] In the endoscope cover according to Supplementary Note 9, the first lumen member and the second lumen member are formed in different shapes.

[Supplementary Note 14] In the endoscope cover according to Supplementary Note 9, the lumen member includes the relatively flexible first lumen member and the relatively hard second lumen member. is doing.

[Appendix 15] In the endoscope cover according to claim 1, in the lumen member, the inner diameter of the first lumen member is larger than the inner diameter of the second lumen member.

[Appendix 16] In the endoscope cover according to claim 1, in the lumen member, the inner diameter of the first lumen member is a sliding fitting portion, and the inner diameter of the second lumen member is larger than the inner diameter of the second lumen member. large.

[Supplementary Note 17] In the endoscope cover according to the first aspect, the lumen member of the first lumen member is configured so as not to communicate with the outside at the portion that is slidably fitted. A covering member is provided between the vicinity of the proximal end and the vicinity of the distal end of the second lumen member.

[Supplementary Note 17-1] In the endoscope cover according to Supplementary Note 17, the covering member is formed of a thin member.

[Supplementary Note 18] In the endoscope cover according to Supplementary Note 17, the covering member is made of an elastic member.

[Supplementary Note 19] In the endoscope cover according to Supplementary Note 17, the covering member is made of the hard lumen member.

When the endoscope cover described in appendices 17 to 19 is made disposable together with the endoscope cover, it is possible to reduce the time and labor required between cases such as cleaning and disinfecting.

[Appendix 20] In the endoscope cover according to claim 1, the insertion section cover section has a channel through which the endoscope insertion section is inserted and a channel through which the lumen member is disposed. However, a partition is provided between each channel.

In addition to the effect of the first aspect, the configurations of Supplementary Notes 17 to 20 can ensure the watertightness / airtightness in the channel lumen.

[Supplementary Note 21] In the endoscope cover according to claim 1, of the tube hollow member arranged in parallel with the endoscope insertion portion, a portion in parallel with the endoscope bending portion is:
It is made more flexible than the other parts. In the endoscope cover described in appendix 21, the portion of the lumen member that is in parallel with the bending portion of the endoscope is formed more flexibly than other portions, and thus the amount of bending force can be reduced.

[Supplementary Note 22] In the endoscope cover according to the first aspect, among the tube hollow members arranged in parallel with the endoscope insertion portion, the flexibility provided in the endoscope insertion portion. The portion arranged in parallel with the flexible tube portion having is formed to be more flexible than the other portions.

In the endoscope cover described in appendix 22, the portion of the lumen member that is in parallel with the flexible tube portion of the endoscope is formed more flexibly than other portions, so that even if the flexible tube portion has a loop shape. Harder to kink than hard ones.

Addendums 7 to 16 and Addendums 20 to 23 have a simple structure without increasing the cost of the disposable lumen member, and increase the power of bending the insertion portion or bending the distal end. The operating power can be reduced without

[Supplementary Note 23] An endoscope including an insertion portion having a bendable bending portion and a flexible tube portion is inserted from a proximal end portion toward a distal end portion, and the inserted endoscope is inserted. In an endoscope cover that includes at least one or more lumen members arranged substantially in parallel with the section, and includes a flexible insertion section cover part, the lumen members are less likely to be deformed in the radial direction. The fitting body is provided slidably with respect to the lumen member.

[Supplementary Note 24] In the configuration of Supplementary Note 23,
The fitting body has a spiral coil shape.

[Supplementary Note 25] In the configuration described in Supplementary Note 23,
The fitting body has a spiral coil shape with an irregular cross section.

[Supplementary Note 26] In the configuration of Supplementary Note 23,
The fitting body is formed by connecting a plurality of piece members with a wire rod in the axial direction.

[0101]

According to the present invention described above, the endoscope cover can have a simple structure and can be manufactured at a low cost, and the bending operation force of the distal end can be lightened when combined with the endoscope. The effect is that you can.

[Brief description of drawings]

1 to 5 relate to a first embodiment, and FIG. 1 is an overall configuration diagram of an endoscope apparatus of an endoscope cover system.

FIG. 2 is a cross-sectional view of a distal end side of an insertion portion of a cover type endoscope.

FIG. 3 is a cross-sectional view of the distal end side of the insertion portion when curved upward.

FIG. 4 is a cross-sectional view of the distal end side of the insertion portion when bending downward.

FIG. 5 is a cross-sectional view showing how the first and second conduit members are connected.

FIG. 6 is a perspective view showing the arrangement and fixing of the pipeline in the vicinity of the operation unit.

FIG. 7 is a perspective view showing the arrangement and fixation of the pipeline in the vicinity of the operation unit.

8A and 8B are cross-sectional views showing a connection state according to a modification.

FIG. 9 is a configuration diagram showing a main part of a cover according to a second embodiment.

FIG. 10 is a configuration diagram showing a main part of a cover according to a third embodiment.

FIG. 11 is a perspective view of an insertion portion cover portion in which an endoscope is inserted according to the fourth embodiment.

12 and 13 relate to a fifth embodiment, and FIG.
2 is a perspective view of a cover type endoscope.

FIG. 13 is a perspective cross-sectional view showing an internal configuration of a pipe or the like.

FIG. 14 is a perspective cross-sectional view showing an internal configuration of a pipe or the like according to a modification.

FIG. 15 is a perspective cross-sectional view showing the internal structure of a pipe or the like according to another modification.

16 is a perspective view of a conduit according to a modified example of FIG.

17 to 20 relate to the sixth embodiment, and FIG. 17 is a perspective view of a distal end of an endoscope insertion portion.

FIG. 18 is a perspective view showing an internal configuration of an insertion section cover section.

FIG. 19 is an explanatory diagram showing a situation in which an endoscope is inserted into and fitted into a cover portion.

FIG. 20 is a cross-sectional view showing a state in which the attachment of the endoscope to the cover has been completed.

[Explanation of symbols]

 2 ... Cover endoscope 3 ... Cover 16 ... Tip cover part 30 ... Mouth part 29 ... Channel conduit 31 ... First conduit member 32 ... Second conduit member 29a ... Connection part 41 ... Thin-walled pipe Cavity member 4 ... Cover endoscope 14 ... Insertion portion 18 ... Bending portion

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[Procedure amendment]

[Submission date] September 29, 1994

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0010

[Correction method] Change

[Correction content]

[0010]

In the configuration of the above invention, the lumen member arranged in parallel with the endoscope in the insertion portion cover portion is provided with the first lumen member and the second lumen along with the bending operation of the endoscope bending portion. The part that fits with the member
By freely sliding the minute portion, the change in the length of the lumen member in the longitudinal direction due to the bending is absorbed, and the bending operation force amount is not burdened.

Claims (1)

[Claims] 1. An endoscope including an insertion portion having a bendable bending portion and a flexible tube portion is inserted from an end portion on the proximal side toward a distal end portion, and the insertion portion of the endoscope is inserted. In an endoscope cover including at least one or more lumen members arranged substantially in parallel and including a flexible insertion section cover unit, the lumen member has a distal end portion whose distal end is arranged. A first lumen member and a second lumen member whose proximal end is arranged at the proximal end, and a proximal end of the first lumen member. The endoscope cover, wherein the distal end portion of the second lumen member is slidably fitted.