JP4027720B2 - Endoscope with sheath - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an endoscope with a sheath sheath in which a sheath sheath for preventing an insertion portion from directly contacting a patient's body wall is detachably provided.
[0002]
[Prior art]
In general, an endoscope with a sheath sheath is configured such that a sheath sheath that shields the flexible insertion portion of the endoscope from the outside can be detachably covered on the flexible insertion portion. By replacing, it is possible to completely prevent infection between patients by the endoscope.
[0003]
In such an endoscope with a sheath sheath, the flexible insertion portion having a substantially constant outer diameter is provided so that the flexible insertion portion can be properly covered with the sheath sheath up to the connection end with the operation portion. The configuration is simply connected to the operation unit.
[0004]
[Problems to be solved by the invention]
However, in such a configuration in which the flexible insertion portion is simply connected to the operation portion, the flexible insertion portion can be used both in the use state where the outer sheath is attached and in the storage state where it is not attached. When the part is bent suddenly in the vicinity of the connection part with the operation part, the buckling damage may occur relatively easily.
[0005]
Therefore, the present invention is excellent in durability that the flexible insertion portion is not easily buckled and damaged near the connecting portion with the operation portion in both the use state in which the outer sheath is attached and the storage state in which the outer sheath is not attached. An object is to provide an endoscope with a sheath sheath.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, an endoscope with a sheath sheath according to the present invention has a sheath sheath for attaching and detaching a flexible insertion portion whose base end is connected to an operation portion from the outside to the flexible insertion portion. In an endoscope with an outer sheath that is provided so as to be freely covered, a folding stopper formed of a resilient material is provided so as to surround the proximal end portion of the flexible insertion portion, and the outer sheath can be used. It is formed so as to cover the flexible insertion portion and the folding stop together.
[0007]
The outer diameter of the anti-bending may be formed in a tapered shape, and the outer sheath may be formed in a shape that gradually spreads toward the end portion in the vicinity of the proximal end.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to the drawings.
In FIG. 1, 10 is an endoscope, and 20 is attached to and detached from the flexible insertion portions 11, 12, and 13 in order to insulate the flexible insertion portions 11, 12, and 13 of the endoscope 10 from the external environment. An outer sheath that is freely covered.
[0009]
The flexible insertion portions 11, 12, and 13 of the endoscope 10 have a distal end in which a bending portion 12 that is bent by remote operation is connected to a distal end of an elongated flexible tube portion 11, and an observation window 14 or the like is disposed on a distal end surface. The body 13 is connected to the tip of the bending portion 12.
[0010]
A bending operation knob 16 or the like for remotely bending the bending portion 12 is disposed on the operation portion 15 connected to the proximal end of the flexible tube portion 11, and bending is performed by rotating the bending operation knob 16. The part 12 bends.
[0011]
A bend stopper 100 is attached so as to surround the proximal end portion of the flexible tube portion 11 and is formed in a tapered cylindrical shape having a tapered outer diameter by an elastic material. Reference numeral 101 denotes a metal attachment base formed integrally with the folding stopper 100.
[0012]
As shown in detail in FIG. 3 described later, the folding stopper 100 is formed in a shape in which the wall thickness is gradually reduced toward the front side. Thereby, as shown by a two-dot chain line in FIG. 1, even when the flexible tube portion 11 is bent at the time of storage of the endoscope 10, the vicinity of the connecting portion with the operation portion 15 is caused by the action of the folding stopper 100. It does not bend suddenly and buckling damage to the flexible tube portion 11 is prevented.
[0013]
A guide pipe 17 made of, for example, a flexible polyethylene resin tube or the like is disposed from inside the flexible insertion sections 11, 12, 13 to the inside of the operation section 15, and a distal end opening 17a of the guide pipe 17 is a distal end portion. It is formed on the front end surface of the main body 13.
[0014]
A forceps port member 30 is disposed at a position facing the proximal end opening of the guide conduit 17 disposed in the operation unit 15, and a forceps plug 32 is attached to the insertion port portion of the forceps port member 30. ing.
[0015]
For example, a sheath tube 20 formed in a thin cylindrical shape with a stretchable material such as a silicone rubber tube is detachably attached to the outer tube 20 on the flexible tube portion 11 and the bending portion 12 of the endoscope 10. Provided to be covered, a tip cap 22 formed of a transparent member and fitted on the tip portion main body 13 is attached to the tip thereof in a watertight manner.
[0016]
The connecting ring 24 fixed to the base end of the covering tube 21 is detachable with respect to the connecting portion 19 between the operation portion 15 and the flexible tube portion 11 of the endoscope 10. The fixing mechanism 25 can be arbitrarily engaged with the circumferential groove 19a formed on the outer periphery.
[0017]
As shown in detail in FIG. 3 to be described later, the proximal end portion 21a of the covering tube 21 connected to the connecting ring 24 gradually increases in diameter toward the end portion in accordance with the shape of the folding stopper 100. It is formed in a different shape.
[0018]
In the covering tube 21, a flexible channel tube 23 (here, a treatment instrument insertion channel) made of, for example, a flexible tetrafluoroethylene resin tube is inserted and disposed over the entire length.
[0019]
The distal end of the flexible channel tube 23 is fixed to the distal end cap 22 so as to open to the outer surface at the distal end surface of the distal end cap 22, and the proximal end portion 23 a of the flexible channel tube 23 passes through the connecting ring 24. It extends backwards through.
[0020]
The flexible channel tube 23 can be inserted into and removed from the guide pipe 17 of the endoscope 10 over its entire length, and guides the proximal end portion 23a of the flexible channel tube 23 as indicated by a one-dot chain line arrow. The tube 17 can be inserted from the distal end opening 17a side and pulled out from the proximal end side opening.
[0021]
FIG. 2 shows a usage state in which the outer sheath 20 is covered with the flexible insertion portions 11, 12, and 13 of the endoscope 10 until the distal end cap 22 comes into contact with the distal end surface of the distal end portion main body 13. ing.
[0022]
In this state, as described above, the connecting ring 24 of the outer sheath 20 is fixed to the connecting portion 19 of the endoscope 10, and the proximal end portion 21 a of the covering tube 21 is covered with the folding stop 100 to be flexible. The sex insertion portions 11, 12, 13 and the folding stop 100 are covered with the outer sheath 20 in a continuous manner.
[0023]
FIG. 3 shows in detail the vicinity of the folding stopper 100 in that state, and the illustration of the flexible channel tube 23 and the like that are built-in is omitted. In the flexible tube portion 11, a base end cap 11 a is fixed to the frame 15 a by a holding ring 9 that is screwed into an end portion of the frame 15 a of the operation portion 15.
[0024]
The attachment base 101 formed integrally with the folding stopper 100 is screwed and fixed to the frame 15a of the operation portion 15. If the screwing is loosened, the folding stopper 100 can be removed from the flexible tube portion 11. it can.
[0025]
The aforementioned fixing mechanism 25 has a structure in which the engaging pin portion 25a that engages with the circumferential groove 19a of the connecting portion 19 is urged inward by the compression coil spring 25b, and the knob that protrudes outward. By pulling up 25c with a fingertip, the engaging pin portion 25a can be removed from the circumferential groove 19a.
[0026]
Then, the proximal end portion 21a of the covering tube 21 is formed in a shape in which the diameter is gradually widened to the end side in accordance with the shape of the bend prevention 100, so that the flexible tube portion 11 and the bend prevention 100 are covered. The tube 21 is smoothly and continuously covered so that not only the surface of the flexible tube portion 11 but also the anti-bending portion 100 is isolated from the contaminated area when the endoscope is used.
[0027]
As shown by a two-dot chain line in FIG. 2, even if the flexible tube portion 11 of the endoscope 10 is bent in the use state, the vicinity of the connection portion with the operation portion 15 is suddenly caused by the action of the folding stopper 100. It is not bent and buckling damage of the flexible tube portion 11 is prevented.
[0028]
When the endoscope 10 is in use, the outer sheath 20 is covered with the flexible tube insertion portions 11, 12, and 13, and at the same time, the flexible channel tube 23 is passed through the guide conduit 17. 4 shows the vicinity of the base end of the guide pipe line 17 in this state.
[0029]
The distal portion of the forceps port member 30 is inserted into a cylinder hole 18 formed in a deep countersink shape in the proximal end opening portion of the guide conduit 17 so as to be movable back and forth in the axial direction, and is flexible. A base end portion 23 a of the channel tube 23 is fixed in a state where it can be inserted into and removed from the forceps port member 30. Reference numeral 31 denotes a forceps insertion passage formed in the forceps port member 30.
[0030]
An O-ring 33 for performing sealing and click fixing is mounted on the side of the forceps port member 30 into which the proximal end portion 23a of the flexible channel tube 23 is inserted, and the proximal end portion 23a of the flexible channel tube 23 is attached. The base end portion 23 a of the flexible channel tube 23 is fixed to the forceps port member 30 by engaging the O-ring 33 with a circumferential groove formed on the outer peripheral surface of the forceps port.
[0031]
The flexible channel tube 23 can advance and retreat in the axial direction over the entire length in the guide conduit 17, and the forceps port member 30 is outwardly moved by a compression coil spring 40 disposed in the cylinder hole 18 (FIG. 4). Is always urged to the left). As a result, the flexible channel tube 23 is always pulled from the forceps port member 30 side by the urging force of the compression coil spring 40.
[0032]
With such a configuration, when the bending portion 12 is bent by the operation of the bending operation knob 16 and the compressive force in the axial direction acts on the flexible channel tube 23, the forceps opening member 30 protrudes outward from the cylinder hole 18. The compressive force applied to the flexible channel tube 23 is absorbed by moving in the direction.
[0033]
On the other hand, when a tensile force in the axial direction acts on the flexible channel tube 23, the forceps port member 30 moves in a direction to enter the cylinder hole 18, and the tensile force applied to the flexible channel tube 23 is absorbed. As a result, an unreasonable force does not act on the flexible tube portion 11, the bending portion 12, and the like.
[0034]
In the case where a so-called multi-lumen tube is used as the flexible channel tube 23, as shown in FIG. 5, the base end portion is further extended to the outside in a state of being fixed to the forceps port member 30, It may be connected to an air / water supply device not shown.
[0035]
34 is an detachable retaining O-ring that restricts the guide duct 17 from coming out of the forceps port member 30, and 23 b is a forceps insertion hole (also a suction port) in the flexible channel tube 23 and forceps insertion. A side hole 23 s formed in the flexible channel tube 23 for passing through the passage 31, a closing plug for closing the end of the lumen used for suction, and a suction tube 50.
[0036]
【The invention's effect】
According to the present invention, the fold prevention formed by the elastic material is provided so as to surround the proximal end portion of the flexible insertion portion, and the outer sheath connects the flexible insertion portion and the fold prevention together. By being formed so as to cover, the flexible insertion part can easily be buckled and damaged near the connection part with the operation part in both the use state with the outer sheath attached and the storage state without attachment. Without being able to obtain excellent durability.
[Brief description of the drawings]
FIG. 1 is a partial side cross-sectional view showing an overall configuration of an endoscope with a sheath according to a first embodiment of the present invention in a storage state.
FIG. 2 is a partial cross-sectional side view showing the overall configuration of the endoscope with sheath sheath according to the first embodiment of the present invention in use.
FIG. 3 is a side cross-sectional view of the vicinity of the folding prevention in the usage state of the endoscope with an outer sheath according to the first embodiment of the present invention.
FIG. 4 is a partial cross-sectional view of the vicinity of the proximal end of the guide conduit in the usage state of the endoscope with a sheath according to the first embodiment of the present invention.
FIG. 5 is a partial cross-sectional view of the vicinity of the proximal end of the guide pipe line in the usage state of the endoscope with a sheath according to the second embodiment of the present invention.
[Explanation of symbols]
10 Endoscope 11 Flexible tube part (flexible insertion part)
12 Curved part (flexible insertion part)
13 Tip body (flexible insertion part)
15 Operation part 20 Outer sheath 21 Covered tube 21a Proximal end vicinity part 100 Breaking prevention

Claims (2)

In an endoscope with a sheath sheath provided so that a sheath sheath for shielding a flexible insertion portion whose base end is connected to an operation portion from the outside is detachably covered by the flexible insertion portion.
A folding stopper formed in a tapered cylindrical shape having a tapered outer diameter by a resilient material is provided in a state surrounding the proximal end portion of the flexible insertion portion, and
The outer sheath includes a thin-walled cylindrical covering tube that covers the flexible insertion portion and the folding joint in a continuous manner,
The covering tube is formed in a shape that gradually increases in diameter toward the base end side along the outer surface of the anti-bending, and between the operation portion and the flexible insertion portion at the base end of the covering tube. A detachable connecting ring is fixed to the connecting part of
An engagement pin portion that engages with the circumferential groove formed in the connection portion, a spring that biases the engagement pin portion in a direction to engage the circumferential groove, and the engagement An endoscope with an outer sheath, characterized in that a fixing mechanism including a knob projecting outward is arranged so that the pin portion can be pulled in a direction to remove the pin portion from the groove . The internal sheath with an outer sheath according to claim 1, wherein the coated tube is formed of a stretchable material and is coated so as to be in contact with both the surface of the flexible insertion portion and the surface of the anti-bending. mirror.

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