JP2004129834A - Pipe line switching device of endoscope - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pipe line switching device of an endoscope capable of performing the switching operation of the state of water supply at all times and the state of suction by one channel tube extremely easily with single action in a simple device. <P>SOLUTION: The channel tube 3 inserted and arranged inside an insertion part 2 and opened at the tip of the insertion part 2, a suction connection pipe 15a communicated to an external suction means (50) and a water supply connection pipe 14a communicated to an external water supply means (60) are communicated and connected to a cylinder-like member 12. In a standby state where a piston-like member 20 is not pushed into the cylinder-like member 12, the water supply connection pipe 14a is communicated to the channel tube 3 and the suction connection pipe 15a is not communicated. In an operation state where the piston-like member 20 is pushed into the cylinder-like member 12, the suction connection pipe 15a is communicated to the channel tube 3 and the water supply connection pipe 14a is switched to a closed state. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an endoscope conduit switching device for switching between a water supply state and a suction state.
[0002]
[Prior art]
In the endoscopy of each part of the human body, for example, in the examination for biliary tract, urology, gynecology, etc., the endoscopy in water while constantly circulating physiological saline through the endoscope into the organ to be observed. Mirror observation is performed.
[0003]
However, since an endoscope inserted into the biliary tract or urinary tract cannot be made thicker as an endoscope for examining the gastrointestinal tract, etc., an independent endoscope for supplying physiological saline is generally used. No channel tube or the like is provided, and the physiological saline is continuously fed into the body using a suction channel tube.
[0004]
Specifically, a three-way cock is attached to the treatment tool insertion port, which is an inlet of the channel tube, and a saline water supply tube is connected to the three-way cock so that the saline solution flows into the channel tube.
[0005]
If the transparency around the observation site is significantly reduced by blood or urine during endoscopic observation while sending physiological saline, it is necessary to perform suction through a channel tube. The operation is performed by a suction operation valve arranged in the operation unit.
[0006]
However, when performing suction through the channel tube, it is necessary to stop the supply of physiological saline to the channel tube, so not only the operation of the suction operation valve, but also the opening and closing operation of the three-way cock This operation must be performed, which is extremely complicated and troublesome for an operator performing endoscopic observation during the operation.
[0007]
Therefore, it is conceivable to use a water supply operation using a foot switch as described in Patent Document 1, for example, instead of the three-way cock.
[0008]
[Patent Document 1]
Japanese Patent Application Laid-Open No. 9-187417
[Problems to be solved by the invention]
However, if the operation of water supply via the channel tube is performed by a foot switch, not only will the configuration become very complicated, but also the operation by hand in the case of a three-way cock is replaced by the operation by foot, It is necessary to perform a water supply stop operation separately from the suction operation, which is still cumbersome and troublesome for an operator performing intraoperative observation.
[0010]
Therefore, the present invention provides a conduit switching device for an endoscope in which a simple device can very easily perform one-touch switching between a state of constant water supply and a state of suction using a single channel tube. With the goal.
[0011]
[Means for Solving the Problems]
In order to achieve the above object, a pipe line switching device for an endoscope according to the present invention is provided such that a piston-like member urged outwardly into a cylinder-like member disposed in an operation unit is capable of moving forward and backward in an axial direction. A channel switching device for an endoscope inserted into the insertion portion, the channel tube being inserted through the insertion portion and opening at the tip of the insertion portion, a suction connection pipe communicating with the external suction means, and an external water supply means. In a standby state in which the communicating water supply connection pipe is connected to the cylindrical member and the piston-like member is not pushed into the cylindrical member, the water supply connection pipe communicates with the channel tube and the suction connection pipe communicates. In the operation state in which the piston-like member is pushed into the cylinder-like member without being passed through, the suction connection pipe communicates with the channel tube and the water supply connection pipe is switched to a closed state. That.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment of the present invention will be described with reference to the drawings.
In FIG. 1, reference numeral 1 denotes an operation section of the endoscope, 2 denotes an insertion section, and a distal end 3a of a channel tube 3 inserted through the insertion section 2 is opened at a distal end of the insertion section 2, and the operation section 1 and the insertion section are inserted. A forceps stopper 4 is attached to the base end 3b of the channel tube 3 arranged near the connection with the part 2.
[0013]
The pipeline switching operation valve 10 is inserted into the cylindrical member 12 disposed inside the operation unit 1 and the cylindrical member 12 movably in the axial direction while being urged outward by the return spring 25. It has a piston-like member 20, and the operation button 11 attached to the distal end of the piston-like member 20 protruding out of the operation unit 1 can be pressed and operated arbitrarily.
[0014]
Then, a communication pipe 17a connected to the bottom of the cylindrical member 12 communicates near the base end of the channel tube 3, and a suction connection pipe 15a and a water supply connection pipe 14a connected to the side surface of the cylinder member 12, The external suction tube 50 and the external water supply tube 60 communicate with an external suction device and an external water supply device (not shown).
[0015]
FIG. 2 shows a standby state of the pipeline switching operation valve 10 in which the piston-like member 20 is not pushed into the cylinder-like member 12, and FIG. 3 shows a pipe in which the piston-like member 20 is pushed into the cylinder-like member 12. The pushing operation state of the road switching operation valve 10 is shown. 4, 5, and 6 show the IV-IV section, the VV section, and the VI-VI section in FIG.
[0016]
The cylindrical member 12 arranged in the operation section 1 is fixed to the operation section 1 by a fixing nut 13 in a state in which a mouth portion having a shape not narrowed with respect to the inner diameter is opened on the outer surface of the operation section 1. .
[0017]
The suction port 15 and the water supply port 14 formed on the side wall surface of the cylindrical member 12 at intervals in the axial direction have a suction connection pipe 15 a communicating with the external suction tube 50 and a water supply connection pipe communicating with the external water supply tube 60. 14a is connected. The communication pipe 17 a communicating with the channel tube 3 is connected to a common port 17 formed at an axial position on the bottom of the cylindrical member 12.
[0018]
A positioning pin 20a is attached to the side surface of the piston-like member 20 which is inserted into the cylinder-like member 12 so as to be able to advance and retreat in the axial direction, as shown in FIG. It engages with a straight groove 12a formed in the mouth portion of the member 12, whereby the piston-like member 20 is positioned so as not to rotate in the cylinder-like member 12.
[0019]
An elastic plastic cover 22a having a hook that is detachable from the fixed nut 13 is provided on the outer peripheral surface of the piston receiving cylinder 22 arranged so as to surround the protruding end half of the piston-like member 20. It is formed by inserting the cylinder 22 integrally.
[0020]
A button seat 24 as a mounting seat for the operation button 11 is threadably connected to the protruding end of the piston-like member 20, and a return coil made of a compression coil spring is provided between the button seat 24 and the bottom surface of the piston receiving cylinder 22. The spring 25 is disposed so as to be sandwiched. Reference numeral 26 denotes an indicator cylinder fitted at the axial position of the operation button 11.
[0021]
In this manner, the piston-like member 20 and the operation button 11 are integrally connected, and are always urged outward (in a direction protruding from the mouth of the cylindrical member 12) by the return spring 25. I have.
[0022]
An L-shaped communication hole 21 formed on the bottom side of the piston-like member 20 is open to the bottom surface and the side surface of the piston-like member 20. In the standby state shown in FIG. The water supply port 14 is communicated with the common port 17 and the suction port 15 in the pushing operation state shown in FIG.
[0023]
An end seal member 30 is attached to the outer peripheral portion of the piston-like member 20 at a position adjacent to the bottom portion, and the intermediate seal is located at a position straddling both the water supply port 14 and the suction port 15 in the pushing operation state shown in FIG. A member 31 is attached.
[0024]
The end seal member 30 is in close contact with the inner peripheral surface of the cylindrical member 12 over the entire circumference so as to always seal between the outer peripheral portion of the piston-like member 20 and the common port 17. In order to reduce the dynamic resistance, it is formed in a substantially eight-shaped cross section.
[0025]
The intermediate portion seal member 31 prevents leakage from the communication portion between the water supply port 14 and the communication hole 21 to the outside in the standby state, and completely prevents the water supply port 14 from being inside the cylindrical member 12 in the pushing operation state. It is formed so as to close.
[0026]
In order to function as such, as shown in FIG. 5, the intermediate portion sealing member 31 is provided with a fitting portion 31 b with respect to the piston-like member 20 so as not to be misaligned with respect to the piston-like member 20, and is positioned. An opening seal portion 31a is formed in a portion facing the water supply port 14 during the pushing operation.
[0027]
The side opening of the communication hole 21 penetrates through the intermediate sealing member 31, as shown in FIG. The intermediate seal member 31 may be integrally formed with the piston 20 by rubber-lining the piston 20.
[0028]
At the position near the protruding portion of the piston-like member 20, as shown in FIGS. 2 and 4, a vent hole 20 b for communicating the atmosphere with the suction port 15 during standby passes through the piston-like member 20 in the lateral direction. In addition, in the cylindrical member 12, a gap for communicating between the vent hole 20b and the suction port 15 is formed around the piston-like member 20 and the intermediate portion sealing member 31. Have been.
[0029]
As a result, at the time of standby shown in FIG. 2, as indicated by arrows, outside air is sucked into the suction connection pipe 15a through the ventilation holes 20b and the like, while the water ( Physiological saline) is sent out to the channel tube 3 through the communication pipe 17a, and always maintains a water supply state.
[0030]
Then, only by pushing the operation button 11 from that state, as shown in FIG. 3, the water supply connection pipe 14a is closed inside the cylindrical member 12, and at the same time, the channel tube is connected via the communication pipe 17a. Suction is performed from 3 to the suction connection pipe 15a, and the body waste fluid and the like are sucked. Then, when the pressing operation of the operation button 11 is released, the original water supply state is immediately restored.
[0031]
【The invention's effect】
According to the present invention, in a standby state in which the piston-like member is not pushed into the cylindrical member, the water supply connection tube communicates with the channel tube, the suction connection tube does not communicate, and the piston-like member is In the operation state pushed into the inside, the suction connection pipe communicates with the channel tube so that the water supply connection pipe is switched to the closed state, so that the one channel tube always supplies water. The switching operation of the suction state can be performed very easily with a simple device with a single touch, and the operator can perform the endoscopic observation operation during the operation without burden.
[Brief description of the drawings]
FIG. 1 is a schematic diagram showing the entire piping of an endoscope according to an embodiment of the present invention.
FIG. 2 is a side cross-sectional view of the pipe line switching device of the endoscope according to the embodiment of the present invention in a standby state (water supply state).
FIG. 3 is a side cross-sectional view of a push-in operation state (a suction state) of the conduit switching device of the endoscope according to the embodiment of the present invention.
FIG. 4 is a sectional view taken along line IV-IV in FIG. 2 of the embodiment of the present invention.
FIG. 5 is a sectional view taken along line VV in FIG. 2 of the embodiment of the present invention.
FIG. 6 is a sectional view taken along the line VI-VI in FIG. 2 of the embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Operation part 2 Insertion part 3 Channel tube 10 Pipe line switching operation valve 11 Operation button 12 Cylindrical member 14 Water supply port 14a Water supply connection pipe 15 Suction port 15a Suction connection pipe 17 Common port 17a Communication pipe 20 Piston member 21 Communication hole 25 Return spring 30 End seal member 31 Intermediate seal member 50 External suction tube 60 External water supply tube

Claims (1)

A pipe switching device for an endoscope in which a piston-like member in a state of being urged outward in a cylinder-like member arranged in an operation unit is inserted so as to be able to advance and retreat in an axial direction,
A channel tube inserted through the insertion portion and opened at the tip of the insertion portion, a suction connection tube communicating with the external suction means, and a water supply connection tube communicating with the external water supply means are connected to the cylindrical member. ,
In a standby state in which the piston-like member is not pushed into the cylindrical member, the water supply connection pipe communicates with the channel tube, the suction connection pipe does not communicate with the channel tube, and the piston-like member has the cylindrical shape. In the operation state in which the endoscope tube is pushed into the member, the suction connection pipe communicates with the channel tube, and the water supply connection pipe is switched to a closed state. Road switching device.

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