JP3537190B2 - Medical equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a medical device in which a mouth and a conduit are directly fitted and bonded.

[0002]

2. Description of the Related Art Conventionally, as disclosed in JP-A-3-193022 and JP-A-3-29634, a cover with a channel (conduit) is provided at an endoscope insertion portion in order to reduce the trouble of cleaning and disinfecting an endoscope. An endoscope (medical instrument) of a type in which an endoscope inspection is performed after being attached and the cover is discarded after the inspection has been proposed. Since this type of cover is a disposable product to be discarded for each case, it is necessary to reduce the running cost of the user (supply it at a low cost).

A conventionally proposed Japanese Patent Application Laid-Open No. 3-19302
In No. 2, a hole having an inner diameter substantially equal to the outer diameter of the channel tube is formed in the distal end cover (mouth portion), and the distal end of the channel tube is fixedly connected. Further, Japanese Unexamined Patent Publication No. Hei.
No., the rear end side of the channel part extends rearward through the hole of the mouth support (mouth part), and the extended end is formed through a plurality of connection pipes of the channel connector (mouth part). Insufflation,
Water supply and suction channels are connected. In addition, the hole extending the channel portion maintains the same clearance with respect to the outer diameter of the channel portion over the entire length.

[0004] Separately, a spiral groove is formed on the outer periphery of a fitting portion of a tube (conduit) for an endoscope whose distal end body (mouth body) is formed of a synthetic resin, and a coil is mounted in this groove. It has been proposed to prevent the tube shape of the fitting portion from being crushed and to perform bonding without water leakage or the like (Japanese Patent Publication No. 5-60378). The fitting hole has an inner diameter substantially equal to the outer diameter of the tube. Only holes are open.

[0005]

Problems to be Solved by the Invention
No. 2 covers the tube (conduit) directly at the tip (mouth)
There is an advantage that the number of parts can be reduced because it is fitted and fixed to the surface, but there is no adhesive pool when fixing with an adhesive, so it is difficult to turn the adhesive securely around the entire circumference, airtight joining and sufficient It has a disadvantage that it is difficult to obtain a high bonding strength. In addition, it is necessary to apply an adhesive to the tube or / and the hole before fitting, which makes it difficult to automate,
Another drawback is that if the tube is inserted after the adhesive is applied to the hole, the adhesive may protrude into the mouth and the space in the conduit and narrow the lumen.

In the case of Japanese Unexamined Patent Publication No. Hei 3-29634, in which a clearance is provided over the entire length and there is no fitting hole, accurate alignment between the conduit and the mouth cannot be performed, and the adhesive is sparsely attached. There is a drawback that there is a possibility that the side holes and the like may be blocked by flowing to the deep part.

In addition, connecting via a connecting pipe has the disadvantage that the number of parts and the number of joints are increased by the amount of the connecting pipe and the cost is increased.

[0008] Japanese Patent Publication No. Hei.
Similar to No. 3022, there is no adhesive pool hole near the end of the conduit side, so there is a drawback that the adhesive cannot be poured after the conduit is inserted into the mouth and it is difficult to automate, and the conduit has a spiral groove and There is a disadvantage that the cost is increased due to the provision of the coil.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and in a case where a conduit is directly fitted and adhered to a mouth portion, accurate positioning can be performed and an adhesive is sufficiently rotated around the conduit. It is an object of the present invention to provide a medical device having an inexpensive joint that can be used.

[0010]

Medical療器tool of the present invention SUMMARY OF THE INVENTION comprises a plurality of conduits, in the medical instrument and a mouth body portion for connecting these conduits respectively, corresponding respectively to the each conduit to the inlet body portion A plurality of fitting holes having an inner diameter and capable of fitting corresponding conduits, and at least two of the plurality of fitting holes provided near entrances of the plurality of fitting holes;
One or two or more that can be filled with an adhesive that can communicate with the fitting hole and fix the conduit fitted in the fitting hole,
An adhesive filling hole having a diameter larger than the inner diameter of the fitting hole.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments will be described below in detail with reference to the drawings. In this embodiment, the endoscope used is an electronic endoscope.

FIGS. 1 to 15 relate to a first embodiment of the present invention. FIG. 1 is a block diagram showing a schematic configuration of a cover type endoscope apparatus having a cover type endoscope, and FIG. FIG. 3 is an external view showing a schematic configuration of the insertion section of the endoscope, FIG. 3 is an external view showing a schematic configuration of the insertion section cover of FIG. 1, FIG. 4 is an external view of the cover distal end of FIG. FIG. 6 is a longitudinal sectional view of a conduit joining portion near the tip of the insertion section cover section taken along the line XX of FIG. 4, and FIG. 6 shows a cover endoscope attached to the insertion section cover section taken along the line AA of FIG. A cross-sectional view near the tip in the mounted state,
FIG. 7 is a cross-sectional view of an intermediate portion of the insertion portion in a state where the cover endoscope is attached to the insertion portion cover portion, which is a cross-section taken along line BB of FIG. 5, and FIG. 8 is a cross-section taken along line YY of FIG. FIG. 9 is a longitudinal sectional view of a lens portion near the distal end in a state where the cover endoscope is attached to the insertion portion cover portion, FIG. 9 is a sectional view illustrating the shape of the nozzle opening of FIG. 4, and FIG. FIG. 11 is an operation diagram showing a joining method of the tip cover, FIG. 11 is an operation diagram showing a joining method of each conduit and the tip cover of FIG. 5, FIG. 12 is an operation diagram showing an operation method of making a lateral hole in the conduit covering tube of FIG. 13 is an operation diagram showing a joining method of the cover sheath and the distal end cover of FIG. 3, FIG. 14 is an operation diagram showing a joining method of each conduit of FIG. 3, and a mouth portion, and FIG. 15 is a cover sheath and an oldme cover of FIG. It is an action figure showing the joining method of.

As shown in FIG. 1, an endoscope apparatus 1 includes a cover-type endoscope 2. The cover-type endoscope 2 includes an endoscope cover 3 and a cover that is inserted into and removed from the endoscope cover 3. Endoscope 4
It is composed of Further, the endoscope apparatus 1 includes a peripheral device in the cart 5 and a cover holder 6.

The cart 5 contains a light source device 7, a video processor 8, a fluid control device 9, and the like. A monitor 10 that receives an image signal from the video processor 8 and displays an endoscope image is mounted on the upper surface of the cart 5.

The endoscope cover 3 includes an insertion portion cover portion 11, an operation portion cover portion 12, and a universal code cover portion 13 which are sterilized in advance.

As shown in FIG. 2, the cover endoscope 4 has an elongated insertion portion 14, and the insertion portion 14 has a non-circular distal end portion 1.
5, a substantially circular curved portion 16 and a non-circular flexible tube portion 17 having substantially the same shape as the distal end.

FIG. 1 shows a proximal end portion of the insertion portion 14 on the proximal side.
As shown in FIG. 5, an operation section 18 also serving as a large-diameter grip section is continuously provided. A universal cord 20 having a connector 19 provided at an end thereof extends from a side of the operation unit 18. At the time of inspection, the connector 19 is connected to the light source device 7, the video processor 8, and the fluid control device 9.

As shown in FIG. 3, the insertion portion cover portion 11 has a distal end cover 21 which is a mouth portion made of a synthetic resin such as polycarbonate and a hand mouth portion 22, and a flexible and thin-walled outer layer therebetween. An outer cover 25 in which a cover sheath 23 made of an elastomeric synthetic resin such as PVC or urethane is joined to the cover 24 is airtightly joined.

As shown in FIG. 4, the distal end face of the distal end cover 21 has a distal end nozzle 31 separate from the distal end cover 21 joined to the distal end cover 21 by ultrasonic welding or bonding.
An air supply nozzle 32 and a water supply nozzle 33 protrude from the tip nozzle 31, both of which have their centers directed to the objective lens cover 34, and the illumination lens cover 35 is airtightly fixed.

As shown in FIG. 5, which is a vertical section taken along the line XX of FIG. 4, a fluoroplastic such as PFA (tetrafluoroethylene-furfluoroalkyl vinyl ether) or the like, A conduit 40 made of a soft synthetic resin such as Teflon (trade name), cross-linked polyethylene resin (trade name: Irax), or PVC is inserted through the end cover 21 and the mouth opening 22 (FIG. 3). Conduit 40
Is composed of an air supply tube 41, a water supply tube 42, and a suction / treatment instrument insertion tube 43.
Is surrounding.

The air supply tube 41 communicates with the air supply nozzle 32, the water supply tube 42 communicates with the water supply nozzle 33, and the conduit covering tube 44 is provided near the distal end cover 21 as shown in FIG. In the state shown in FIG. 5 when the endoscope 4 is mounted (see the cross section taken along the line AA in FIG. 5), almost the entire length of the insertion section cover section 11 is shown in FIG. B- of FIG.
In the state as shown in (B line cross section), they respectively surround the conduits 40 and are fixed by crimping (not shown) at the hand opening 22. As shown in FIG. 7, the flexible tube portion 17 of the cover endoscope 4 insertion portion 14 has a substantially circular cross section 47 made of a flex 45 in which a band-shaped metal plate is wound in a coil shape inside and a mesh-like blade 46. And a doughnut-shaped watertight resin layer 48 and an anti-rotation resin layer 49 having a non-circular cross section that is softer than the watertight resin layer 48.

Returning to FIG. 5, both ends of the outer skin 25 are fixed in a state in which the outer skin 25 is slightly stretched from its natural state in order to prevent the insertion of the insertion portion 14 of the cover endoscope 4 from sagging and wrinkling. I have. Further, a plurality of small-diameter lateral holes 50 are formed in the distal end joint portion of the conduit covering tube 44.

On the other hand, as shown in FIG. 8, which is a vertical sectional view taken along the line YY of FIG. 4 when the cover endoscope is mounted on the insertion portion cover 11, the objective lens cover 34 is used as the cover endoscope. The illumination lens lens cover 35 is hermetically fixed at a position corresponding to the illumination lens 52 at a position corresponding to the objective lens 51 of the mirror 4.

As shown in FIGS. 9A and 9B, the shape of the air supply nozzle 32 is different from the shape of the water supply nozzle 33, and the opening width HA and the opening height hA of the air supply nozzle 32 are set as follows. When the opening width HW and the opening height hW of the water supply nozzle 33 are defined as HA> HW, hA <hW. At this time, the total opening areas of both are almost equal. As shown in FIGS. 9C and 9D, the inclination angle θA between the upper surface and the lower surface of the air supply nozzle 32, the water supply nozzle 3
When the inclination angle θW between the upper and lower surfaces of 3 is θA ≒ 0 ° <
θW.

Further, a treatment tool introduction port 52 that smoothly communicates with the suction / treatment tool insertion tube 29 is provided in the hand opening body portion 22.
(See FIG. 3), and as shown in FIG.
Endoscope treatment tools (not shown) are introduced into the body cavity from one through hole 53 to perform treatment.

[Joining Procedure and Operation of Insertion Cover Part] Next, a method of manufacturing the insertion part cover part 11 (joining procedure) of the endoscope cover 3 will be described in order with reference to FIGS.

FIG. 10 is a view for explaining the process of hermetically joining the front cover 21 and the two lens covers 34 and 35. First, as shown in FIG. An abutting jig for bonding and drying, which is made of a hard-to-adhesive synthetic resin or a hard-to-adhesive resin such as Teflon or silicon coated on a portion in close contact with the bonding surface 6
0 is inserted up to the abutting surface (the inner surface of the light shielding member) 61.
Next, the flat lens covers 34 and 35 are dropped from the front end side of the front cover 21 until they come into contact with the abutting jig 60. Next, as shown in FIG. 10 (b), the lens cover 34,
An adhesive is poured around 35, and if there is any protrusion, it is wiped off and dried, and the airtight bonding and fixing is completed. Next, the inner surfaces of the lens covers 34 and 35 and the abutting surface 61 are formed as substantially smooth surfaces by pulling out the abutting jig 60 having poor adhesion.

In this embodiment, the lens cover 34,
35 and the tip cover 21 are separated, but the lens cover 3
The lens cover 3 is made of an optically transparent polycarbonate, PMMA, or the like.
It is naturally possible to form a member corresponding to the abutting surface 61 between 4 and 35 separately from a synthetic resin such as black capable of optically shielding light, and similarly to hermetically adhere using the abutting jig 60. is there. The light-shielding member functions to prevent the illumination light transmitted between the lens covers 34 and 35 from entering the objective lens 51 and causing flare and ghost.

As the adhesive used here, the workability is good when an ultraviolet curable adhesive having a certain viscosity flows into the narrow gap.

FIGS. 11 to 13 show the tip cover 21 and each conduit 4.
FIG. 0 is a view for explaining a joining process of the conduit covering tube 44 and the cover sheath 23.

First, as shown in FIG. 11A, the distal end cover 21 is set on the fixing jig 63. The fixing jig 63 has a plurality of metal cores 64 that are fitted into the air supply tube 41, the water supply tube 42, and the suction / treatment instrument insertion tube 43 so as to be substantially equal in diameter to the through holes 53 of the distal end cover 21. Set so that it protrudes toward you.

Next, as shown in FIG. 11 (b), each conduit 40 is inserted to the end of the fitting hole 65 (see FIG. 5) of the tip cover 21 using the core bar 64 as a guide, and the tip cover 21 is filled with an adhesive. A predetermined amount of adhesive is applied to the hole 66 using the injector 62 (see FIG. 10) such as a dispenser described above. At this time, the adhesive is applied until it becomes the same as the end face on the proximal side of the front cover 21.

The core metal 64 is desirably a hard-to-adhere one such as Delrin so that it can easily come off even if the adhesive flows.

Next, as shown in FIG. 12B, the adhesive surface of the conduit coating tube 44 is sandwiched and pressed by using a pressure hole jig 67 as shown in FIG.
As shown in (c), a plurality of lateral holes 50 are opened in the adhesive surface of the conduit covering tube 44, and the conduit covering tube 44 having the lateral hole 50 is inserted from the proximal end of the conduit 40, and the adhesive is injected. It is inserted into the adhesive filling hole 66, dried and solidified. The conduit covering tube 44 has a function of preventing the three conduits 40 from being entangled or broken in the cover sheath 23, and the insertion portion 14 of the endoscope 4 for the cover covers the cover sheath 23.
It has a function that allows it to be inserted smoothly into the inside, but there is no need for airtight joining. Therefore, in order to reduce the defects of the material which is excellent in flexibility and good in slipperiness but hard to adhere,
A lateral hole 50 is made in the adhesive surface at the tip, and the adhesive flows into the lateral hole 50 so that the adhesive is caught and the effect is obtained.

In this embodiment, the conduit-coated tube 4
Although 4 is used, it is not necessarily a tube shape but may be a sheet shape, and it is added that it can be deleted in some cases in order to reduce the diameter. The adhesive used here is a low-curing one-component epoxy adhesive, a hot-melt adhesive, or when the tip cover 21 is a transparent synthetic resin, the use of the above-mentioned ultraviolet-curing adhesive or the like reduces labor and operability. Good.

Here, when the material of each conduit 40 is hard to adhere, for example, a tetra-etch treatment,
Naturally, it is better to adhere after performing pre-treatments such as an Irax chemical treatment and a corona discharge treatment.

In this embodiment, the adhesive filling hole 66 has a non-circular shape which is in common communication with all the following fitting holes 65 (see FIGS. 5 and 11). This has an excellent effect that a plurality of conduits can be joined by a single application of the adhesive, and the tip cover 2 that is desired to be made slightly thinner
1 also has an effect that a large adhesive pool area can be secured. However, it is not good if the adhesive pool is too wide (for example, UV curable adhesive with low viscosity)
When used, it is also possible to form an independent adhesive filling hole (not shown) having an inner diameter slightly larger than the inner diameter of each fitting hole 65 and inject into each hole.

Next, as shown in FIG. 13 (a), the distal end joint of the cover sheath 23 is turned over in advance by using a cover sheath covering jig 68, and inserted through the proximal end of the conduit 40. Next, as shown in FIG.
After the adhesive is applied to the entire circumference of the adhesive application surface of the outer periphery, the cover sheath 23 turned over as shown in FIG. 13 (c) is put on a predetermined position using the cover sheath covering jig 68. The cover sheath covering jig 68 has a double structure of an inner diameter pipe 68a and an outer pipe 68b. With this cover sheath covering jig 68, the cover sheath 23 having an inner diameter smaller than the outer diameter of the distal end cover 21 can be easily covered.

Next, as shown in FIG.
A sheath fixing member 69 such as a non-adhesive Teflon tape or the like for preventing misalignment is attached from above, and dried and solidified.

The sheath fixing member 69 may be made of a material other than the above-mentioned tape, such as a combination of a hard member for preventing damage to the outer skin during resection (a thin plate piece) and a heat-shrinkable tape, or an air rubber seal having a variable inner diameter. Rear cover sheath 23
Anything that can be easily removed from

Next, the fixing jig 63 is moved from the tip cover 21 to the fixing jig 63.
Is removed, and the distal end nozzle 21 separate from the distal end cover 21 is joined to the distal end cover 21 by ultrasonic welding or bonding, whereby the distal end side of the insertion portion cover portion 11 is completed.

Here, when the tip nozzle 31 is integrated with the tip cover 21 or is joined in advance at the component stage, the core metal 64 may be one for the suction / treatment instrument insertion tube 43 alone. At this time, if the other conduit 40 is temporarily fixed to the suction / treatment instrument insertion tube 43 with a tape or the like, it can be prevented from coming off when the adhesive is dried.

Next, as shown in FIG. 14A, the hand opening 22 is attached to the fixing jig 71. A plurality of non-adhesive cores 72 similar to the fixing jig 63 stand on the fixing jig 71. It is preferable that the cored bar 72 has flexibility such as a Teflon tube so as to easily follow the bending of the old cover 24. After the cover sheath 23 and the lid cover 24 are moved toward the distal end side so as to fold the cover sheath 23, the proximal side of each conduit 40 is moved in the same procedure as the distal end side to the fitting hole end (not shown) in the proximal opening 22. The metal core 72 is inserted into the guide up to.

Next, as shown in FIG. 14 (b), a predetermined amount of adhesive is injected into an adhesive filling hole 73 provided in the hand opening 22 and dried and solidified.

Next, as shown in FIG.
Is placed on a predetermined position of the hand opening 22, and the thin heat-shrinkable ring-shaped heat-shrinkable tube 74 is placed over both the old cover 24 and the hand opening 22 so that hot air such as a heat gun is locally applied. Shrink it and fix it tightly.

Then, the fixing jig 71 is removed, and similarly, the operation section cover section 12 and the universal cord cover section 13 are joined by the heat shrink tube 74, and a conduit from the universal cord to the fluid control device 9 is inserted and joined. The manufacture of the endoscope cover 3 is completed.

As shown in FIG. 5, the fitting hole 65 of the distal end cover 21 of this embodiment and the through hole 53 on the distal end side thereof are provided.
There is a tapered chamfer 75 between about 30 ° and 60 °. Thus, even if the outer diameter of the conduit 40 is slightly varied, it is possible to prevent a problem that the distal end of an endoscope treatment tool (not shown) inserted into the conduit 40 is caught by the end of the through hole 53 and cannot be inserted into the body cavity. it can. The inner diameter of the communication hole 76 of the tip nozzle 31 is the same as that of the through hole 53 of the tip cover 21.
Is slightly larger than the inner diameter of the endoscope, and even if the mounting position of the distal end nozzle 31 and the distal end cover 21 is slightly displaced, the distal end of the endoscope treatment tools described above is prevented from snagging.
Having chamfers at both ends of the communication hole 76 of this member makes it more difficult to catch.

As described above, according to the present embodiment, an adhesive filling hole is formed in each of the distal end cover 21 and the proximal end portion 22 of the endoscope cover 3 and / or at least one of them. Since it is provided, the adhesive can be poured into this adhesive filling hole and dried and fixed, so that
The adhesive can be easily automated, and the adhesive does not protrude into the mouth and the space in the conduit to narrow the lumen, and a sufficient adhesive strength can be obtained.

Since the shapes of the openings of the air supply nozzle 32 and the water supply nozzle 33 are set to be HA> HW and hA <hW, and the total opening area is substantially the same, the force of air to the lens cover 34 is the same and is wider. Water droplets on the lens cover 34 having an area can be blown off.

Further, an air supply nozzle 32 and a water supply nozzle 33
Since the inclination angle between the upper surface and the lower surface of the lens cover is set to θA ° 0 ° <θW, the air flows so as to sweep over the surface of the lens cover 34, and the water or liquid rebounds once before the surface of the lens cover 34 to form fine water droplets. Washability is improved.

The anti-rotation resin layer 49 is formed of the watertight resin layer 4.
Since it is softer than 8 or 47, it is less flexible in the radial direction and easy to twist, but has a non-circular cross section so that it is less likely to slip in the cover sheath 23 and is easily gripped over the cover sheath 23.

Further, by forming the anti-rotation resin layer 49 from elastic rubber having high elasticity, the elasticity of the insertion portion cover portion 11 is improved, and the insertability into the body cavity can be improved.

Since the inner surfaces of the lens covers 34 and 35 and the abutting surface (the inner surface of the light-shielding member) 61 can be made substantially the same height, the objective lens 51, the lens cover 34 and the illumination lens 5 can be formed.
2 and the lens cover 35 can be set to be small,
The influence of poor light distribution is small and the outer diameters of the lens covers 34 and 35 can be reduced, and as a result, the outer diameter of the distal end cover 21 can be reduced, so that the patient's pain can be reduced.

Furthermore, if the lens covers 34 and 35 and the light-shielding member have the same thickness, a large dent on the outer surface cannot be formed, so that water and dirt hardly accumulate in the dent and the cleaning property is improved.

Further, since the holes 66 and 73 for filling the adhesive are common to the plurality of conduits 40, the labor for the injection operation is reduced, and automation is easy and the cost is low.

Next, a second embodiment will be described. FIG.
19 to 19 relate to a second embodiment of the present invention. FIG. 16 is a longitudinal sectional view of a joining portion showing a section of a tip cover with a conduit, and FIG. 17 is an operation diagram showing a joining method of a lens cover and a tip cover. 18 is a configuration diagram showing the configuration of the insertion portion cover, FIG.
FIG. 3 is a configuration diagram showing a configuration of a tip nozzle. Since the second embodiment is almost the same as the first embodiment, only the differences from the first embodiment will be described, and the same components will be denoted by the same reference numerals and description thereof will be omitted.

As shown in FIG. 16, in the present embodiment, the fitting hole 65 has a stepped portion 81 for regulating the fitting length of the conduit 40, and the stepped portion 81 has a through hole as in the first embodiment. 53 is open. The inner diameter of the through hole 53 is Dk,
Is the inner diameter of D1, and the inner diameter of the conduit 40 joined thereto is d1.
P, if the outer shape of the conduit is DP (the thickness of the conduit is tP),
Each dimension (and dimensional tolerance) is certified to satisfy the following relational expression.

[0058]

(Equation 1) Here, DP = φ4 ± 0.1 mm, dP = φ3.2 +
Substituting into the above equation as 0.1mm, D1 = φ4.15 + 0.1mm

(Equation 2) The inner diameter of the through hole 53 is set to 3.70 + 0.1 mm, so that even if there is variation, the treatment tools do not catch on the through hole 39 and the fitting length of the conduit 40 can be regulated.

As shown in FIG. 17, the lens covers 34, 35
Has a chamfered portion 82 on the upper side, and has a stopper surface 83 that does not fall to the distal end side when fitted from the inside of the distal end cover 21. Also, after inserting a thin metal lens receiving plate 84 having a thickness of about 0.1 to 0.2 mm from the inside similarly and pressing the abutting jig 85, the lens covers 34 and 35 are formed in the same procedure as in the first embodiment. An adhesive is poured into the gap between the front cover 21 and the tip cover 21 by an injector 62, and is adhered, dried, and solidified together with the lens receiving plate 84.

The insertion section 14 of the cover endoscope 4 is shown in FIG.
The front side 89 (CC section), the rear side 90 (EE section), and the flexible tube section 17 (FF section) of the distal end portion 15 and the curved portion 16 following the distal end portion 15 are formed as shown in FIG. It has a substantially semicircular (non-circular) cross-sectional shape of substantially the same shape, and a portion that is actually bent (DD cross section) in the middle of the curved portion 16 has a substantially circular cross section.
The major difference from the first embodiment is that an anti-rotation resin layer 49 having a non-circular cross section is directly water-tightly coated in addition to an intermediate structure 47 including a flex 45 and a blade 46. Reference numeral 91 denotes a waterproof elastic tube of the bending portion 16, and reference numeral 92 denotes a bending piece.

Further, the air supply nozzle 32 and the water supply nozzle 33 are arranged in a straight line toward the lens cover 34 so that water can be supplied and supplied from the same direction toward the center of the lens cover 34 for the objective lens. The shape of the nozzle opening has the same relationship as in the first embodiment.

As described above, according to the present embodiment, in addition to the effects of the first embodiment, even if there are dimensional variations in the conduit 26 and the distal end cover 21, the endoscope treatment tools to be passed therethrough are provided. No snagging (more difficult to snag than in the first embodiment).

Further, since the step portion 81 is provided, the length for fitting the conduit 40 can be restricted, and variation in the entire length can be suppressed (this point is the same in the first embodiment).

Further, since the lens covers 34 and 35 have a chamfered surface 82 and the tip cover 21 has a stopper surface 83, even if a pressing force from the inside of the lens covers 34 and 35 or an impact force is applied to the outer surface, the lens cover 34 may be used. , 35 do not fall into the body cavity at all. Lens receiving plate 8
Since the bonding jigs are bonded via the support 4, it is not necessary to use the abutting jig B as a non-adhesive material.

Further, since water can be supplied and supplied to the center of the lens cover 34 from the same direction, the cleaning and drainage properties are good, and the supply of air to the nozzle tip is independent. There is no stringing due to residual water in the water supply pipe line, the water drainage property is good, and the outer diameter of the distal end cover 21 can be made smaller than in the first embodiment.

Note that the present invention is not limited to these embodiments, and it is not limited to these embodiments, and it is possible to join a conduit in an inexpensive endoscope or a conduit for a treatment instrument for an endoscope such as an injection needle with a Teflon sheath in a medical instrument. Needless to say, it can be used for joining the mouth part with the hand, and various modifications can be made. The same means may be applied to inexpensive industrial endoscopes and accessories.

[Appendix 1] The medical device according to claim 1, wherein the number of the holes for filling the adhesive is the same as the number of the fitting holes.

[Appendix 2] The medical device according to claim 1, wherein the number of the adhesive filling holes is one or less than the number of the fitting holes, regardless of the number of the fitting holes. Have been.

[Supplementary Note 3] In the medical device according to supplementary note 2, the adhesive filling hole is formed in a common communicating hole shape of at least two or more of the fitting holes.

[Supplementary Note 4] The medical device according to claim 1, wherein a step portion for regulating a fitting length of the conduit is provided at an end of the fitting hole.

[Supplementary Note 5] The medical device according to supplementary note 4, wherein the step portion has a through hole having an inner diameter substantially equal to the inner diameter of the conduit.

[Supplementary Note 6] The medical device according to Supplementary Note 5, wherein a chamfered portion is provided at a portion of the step portion where the through hole and the fitting hole are continuous.

[Supplementary Note 7] In the medical device according to Supplementary Note 5, the relationship between the inner diameter (DK) of the through hole of the step portion and the inner diameter (D1) of the fitting hole satisfies the following condition. I have. The outer diameter of the conduit is Dp, the inner diameter of the conduit is dp, and the thickness of the conduit is tp.

[0074]

[Equation 3] Supplementary notes 4 and 5 are advantageous in that the length of fitting of the conduit to the mouth can be regulated, so that variations in the total length can be suppressed (the mouth support in Japanese Patent Application Laid-Open No. 3-29634 has no step). .

The supplementary notes 6 and 7 are advantageous in that even if the outer diameter of the conduit varies, the endoscope treatment tools inserted into the conduit are less likely to be caught. In particular, Appendix 7 has a relationship that does not catch when inserted from the conduit side (Japanese Patent Laid-Open No. 3-19).
There is no chamfered portion in the continuous part of No. 3022 and Japanese Patent Publication No. 5-60378, and no consideration is given to the treatment instrument being caught by the dimensional variation.)

[Supplementary Note 8] The medical device according to claim 1, wherein the plurality of conduits are fixed to the mouth, the number of the fitting holes is equal to the number of the conduits, and the adhesive is used. The filling hole is formed in a common communicating hole shape for at least two conduits.

The supplementary notes 3 and 8 are advantageous in that the work of injecting the adhesive into a plurality of conduits can be performed at the same time, which is troublesome, easy to automate, and inexpensive (all the conventional examples have fitting holes and adhesive filling holes). The same number of holes is not actually described as the hole for filling the adhesive).

[Supplementary Note 9] In the medical device described in Supplementary Note 8, another member was inserted into the hole for filling with the adhesive together and fixed by adhesion.

[Supplementary Note 10] The medical device according to supplementary note 9, wherein the another member is a conduit covering tube for bundling a plurality of conduits into one.

[Supplementary Note 11] The medical device according to Supplementary Note 9, wherein a plurality of lateral holes are formed in a portion corresponding to the front end adhesive portion of the another member, and the adhesive is also flown into the lateral holes and fixed. .

The advantages 9 to 11 are advantageous in that another member can be fixed simultaneously with the adhesion of the conduit. Also in this case, the positioning accuracy of the conduit with respect to the mouth portion is not impaired.

Further, the supplementary note 11 is advantageous in that even if another member is hardly adherent, the bonding strength is improved by the anchor effect of the adhesive flowing into the lateral hole as compared with when there is no other member.

[Supplementary Note 12] In the medical device according to claim 1 and supplementary notes 1 to 11, the mouth portion and the conduit are made of a synthetic resin (plastic).

[Supplementary Note 13] The medical device according to claim 1, wherein the mouth portion is a distal end cover or a proximal mouth portion of a cover-type endoscope, and the conduit is an air supply. A channel, a water supply channel, or a suction channel.

The supplementary notes 12 and 13 are advantageous in that the distal end cover of the medical instrument or the cover type endoscope can be supplied at low cost.

[Supplementary Note 14] An endoscope cover including a lens cover or a light shielding member and a tip cover having a through hole into which the lens cover or the light shielding member is fitted.
An endoscope cover for a cover-type endoscope in which a bonding jig is pressed against one surface of a front end cover and an adhesive is poured from the other surface around a lens cover or a light-shielding member fitted into the through-hole and airtightly bonded. Production method.

[Supplementary Note 15] The medical device according to supplementary note 14, wherein the joining jig has poor adhesion.

The endoscope covers of appendices 14 and 15 do not require a lens cover or a light-blocking member upper or lower surface for bonding, so that the inner and outer surfaces can be made substantially the same as the front end cover. As a result, the distance between the lens cover and the end lens for the endoscope can be reduced, and a large dent can be formed on the outer surface. JP-A-3-26
A similar example of a tip cover is shown in the prior example of Japanese Patent No. 4038, but there is no description on the manufacturing method.

[Supplementary Note 16] In an endoscope having a flexible tube having an outer shape with a non-circular cross section, a middle cross section made of an inner layer flex and a blade is substantially circular, and a cross section of an outer resin layer is formed. An endoscope characterized by having a noncircular shape and a non-uniform wall thickness.

[Supplementary Note 17] In the endoscope according to Supplementary Note 16, the outer resin layer includes a plurality of layers, and at least the outermost layer has a non-circular cross section.

[Supplementary Note 18] The endoscope according to supplementary note 17, wherein the hardness of the outer layer is different from that of the outer layer, and the outer layer is softer than the inner layer.

[Supplementary Note 19] The endoscope according to Supplementary Notes 16 to 18, wherein the outer shape of the distal end hard portion and the outer shape of the flexible tube portion are substantially the same, and an insertion space having substantially the same shape as the outer shape is provided. It is a cover-type endoscope used in combination with a mirror cover.

The endoscopes of Supplementary Notes 16 to 19 are advantageous in that they have a low flexibility in the radial direction and are easy to twist, so that they are easy to insert into the body cavity.

[0094] The endoscope of Appendix 19 is also advantageous in that it has less directivity of flexibility in the radial direction and that the flexible tube can be twisted well through the sheath of the endoscope cover.

As a conventional technique, Japanese Utility Model Publication No. 53-2
Nos. 0954 and 50-2948, each having an elliptical (elliptical) cross section, and those having a cross section having a concave groove described in Japanese Patent Application Laid-Open No. 1-313038 and Japanese Patent Publication No. 4-46969. No. 53-20954 No. 53-20954 is a conduit (inside construction) with two circular cross-sections arranged side by side and covered with an outer skin of uniform thickness. Are similar in shape and both are non-circular cross sections. When inserting into the body cavity while twisting while holding the flexible tube part of the endoscope, these conventional ones have a non-circular cross section and are easy to grasp, but the medium construction consisting of the flex and blade inside is non-circular Therefore, there is a drawback that the flexibility in the radial direction is large and it is difficult to twist evenly and a jump occurs, and the present invention can solve this drawback.

[0096]

According to the medical instrument of the present invention as described above, according to the present invention, the conduit inserted into the fitting hole of the front Symbol opening the body, the adhesive on the adhesive filling hole around the conduit The adhesive can be poured and dried and fixed, so that it is easy to automate, and there is an effect that a sufficient adhesive strength can be obtained without the adhesive protruding into the space between the mouth and the conduit and narrowing the lumen.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing a schematic configuration of a cover type endoscope apparatus including a cover type endoscope according to a first embodiment.

FIG. 2 is an external view showing a schematic configuration of a cover endoscope insertion portion of FIG. 1;

FIG. 3 is an external view showing a schematic configuration of an insertion unit cover unit in FIG. 1;

FIG. 4 is an external view of the cover tip of FIG. 3 viewed from the tip side.

FIG. 5 is a vertical sectional view of a joint portion of the conduit near the distal end of the insertion portion cover, which is a cross section taken along line XX of FIG.

6 is a cross-sectional view of the vicinity of the distal end in a state where the cover endoscope is mounted on the insertion portion cover section, which is a cross section taken along line AA of FIG.

FIG. 7 is a cross-sectional view of an intermediate portion of the insertion portion in a state where the cover endoscope is mounted on the insertion portion cover portion, which is a cross section taken along line BB of FIG.

8 is a longitudinal sectional view of a lens portion near the distal end in a state where the cover endoscope is attached to the insertion portion cover section, which is a sectional view taken along line YY of FIG. 4;

FIG. 9 is a sectional view illustrating the shape of the nozzle opening in FIG. 4;

FIG. 10 is an operation diagram showing a method of joining the lens cover and the front end cover of FIG. 4;

FIG. 11 is an operation view showing a method of joining each of the conduits of FIG. 5 to a tip cover.

FIG. 12 is an operation view showing an operation method for making a horizontal hole in the conduit-coated tube of FIG. 5;

FIG. 13 is an operation diagram showing a method of joining the cover sheath and the tip cover of FIG. 3;

FIG. 14 is an operation diagram showing a method of joining each conduit and the mouth part in FIG. 3;

FIG. 15 is an operation view showing a method of joining the cover sheath and the dome cover in FIG. 3;

FIG. 16 is a longitudinal sectional view of a joint showing a cross section of the distal end cover and the conduit according to the second embodiment.

FIG. 17 is an operation diagram showing a method of joining the lens cover and the tip cover according to the second embodiment.

FIG. 18 is a configuration diagram showing a configuration of an insertion portion cover according to the second embodiment.

FIG. 19 is a configuration diagram showing a configuration of a tip nozzle according to a second embodiment.

[Explanation of symbols]

1. Endoscope device 2. Cover type endoscope 3. Endoscope cover 4: Endoscope for cover 11 ... insert part cover part 12 ... Operation unit cover 13. Universal code cover 14 insertion section 15 ... Tip 16 ... Bending part 17 Flexible tube part 18 Operation unit 20… Universal cord 21 ... Tip cover 22 ... hand mouth body 23 ... Cover sheath 24 ... Oldome cover 25 ... skin 31 ... tip nozzle 32 ... air supply nozzle 33 ... water nozzle 34 ... Lens cover for objective lens 35 ... Lens cover for illumination lens 40 ... Conduit 41… Air supply tube 42 ... water supply tube 43 ... Suction and treatment instrument insertion tube 44 ... Conduit covered tube 45 ... Flex 46 ... Blade 47… Made inside 48: Watertight resin layer 49: anti-rotation resin layer 50 ... horizontal hole 65… Mating hole 66, 73 ... holes for filling adhesive

──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-6-39035 (JP, A) JP-A-6-225853 (JP, A) JP-A-61-1113467 (JP, A) JP-A-7- 31681 (JP, A) Fully open sho 56-163450 (JP, U) Fully open sho 58-54848 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) A61B 1/00-1 / 32 A61M 25/00 A61M 39/00

Claims (1)

(57) [Claims] 1. A medical device having a plurality of conduits and a mouth portion connecting each of the conduits, wherein the mouth portion has an inside diameter corresponding to each of the conduits, and the corresponding conduits are fitted. A plurality of fitting holes that can communicate with at least two or more of the plurality of fitting holes provided near the entrances of the plurality of fitting holes and fitted into the fitting holes. 1. A medical device comprising: one or more adhesive filling holes having a diameter larger than the inner diameter of the fitting hole, which can be filled with an adhesive capable of fixing a conduit.