JP2004236842A - Suction operating device of ultrasonic endoscope - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a suction operating device of an ultrasonic endoscope, facilitating switching between suction operation from a forceps channel suction port and suction operation from a balloon suction port, having a simple structure to facilitate assembling and hardly causing operational failure. <P>SOLUTION: When a piston body 14 is forced into a cylinder body 11, a connecting opening 9a of a sucking pipe 9 and a sucking pipe side opening 31a of a channel suction communicating hole 31 are opposite to each other at a position of transition from a state of compressing a compression coiled spring 21 having a small spring constant to a state of compressing a coiled spring 22 having a large spring constant as well, and in a position where both coiled springs 21, 22 are put in the compressed state, the connecting opening 9a of the sucking pipe 9 and the sucking pipe side opening 32a of the balloon suction communicating hole 32 are opposite to each other. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a suction operation device of an ultrasonic endoscope for performing a suction operation in an ultrasonic endoscope.
[0002]
[Prior art]
In general, an ultrasonic endoscope is provided with a forceps channel suction port that opens on the outer surface of the distal end of the insertion section, and a balloon suction port that opens on the inside of a balloon attached to the distal end of the insertion section. A suction operation device capable of switching between a suction operation and a suction operation from a balloon suction port is provided in the operation unit.
[0003]
In the past, such a suction operation device was a combination of a suction operation valve device and a switching lever or the like.However, this would complicate the operation. Therefore, only by changing the depth of the operation of pressing the operation button, the forceps channel suction port was used. It is possible to switch between a suction operation from the suction port and a suction operation from the balloon suction port (for example, Patent Document 1).
[0004]
[Patent Document 1]
Japanese Patent No. 3017957, FIGS. 1, 6, and 7
[0005]
[Problems to be solved by the invention]
However, in the conventional suction operation valve device of an ultrasonic endoscope described in Patent Document 1, two cylinder bodies, a cylinder body communicating with a forceps channel suction port and a cylinder body communicating with a balloon suction port, are arranged in parallel. Pistons that are arranged side by side and advance and retreat by a common operation button are arranged in each cylinder, and two operation valve mechanisms are operated with one operation button, so the structure is extremely complicated It was troublesome to assemble, and at the same time, malfunctions were likely to occur.
[0006]
Therefore, the present invention provides a super structure that can easily switch between the suction operation from the forceps channel suction port and the suction operation from the balloon suction port, and has a simple structure that is easy to assemble and hardly causes malfunctions. An object of the present invention is to provide a suction operation device for an acoustic endoscope.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, the suction operation device for an ultrasonic endoscope of the present invention is provided with an ultrasonic probe and an optical observation window at the distal end of the insertion section, and a balloon attached to the distal end of the insertion section. An ultrasonic endoscope provided with a balloon suction port that opens inside and a forceps channel suction port that opens outside the balloon, and an operation unit connected to the base end of the insertion unit, In a suction operation device of an ultrasonic endoscope in which a suction operation valve for switching between a suction operation and a suction operation from a forceps channel suction port is disposed, a suction operation valve includes a suction source tube connected to a suction source. The cylinder body connected with the balloon suction line communicating with the channel and the balloon suction port and the channel suction line communicating with the forceps channel suction port, and being operated to move axially in the cylinder body A piston body for switching between a state in which the balloon suction line communicates with the suction source line and a state in which the channel suction line communicates with the suction source line is provided. A position in which the balloon suction communication hole for communicating the suction source pipe and the balloon suction pipe and the channel suction communication hole for communicating the suction source pipe and the channel suction pipe do not interfere with each other. In the side surface of the piston body, the base opening of the balloon suction communication hole and the base opening of the channel suction communication hole for connecting to the connection opening of the suction source pipe are arranged side by side in the axial direction, Two compression coil springs having different spring constants were arranged in series in a state where they were urged in a direction to push out the piston from the cylinder, and the piston was pushed into the cylinder. At the position where the coil spring having a small spring constant is compressed to the state where the coil spring having a large spring constant is also compressed, the connection opening of the suction source pipe and the base opening of the channel suction communication hole face each other. The connection opening of the suction source conduit and the base opening of the balloon suction communication hole face each other at a position where both coil springs are compressed.
[0008]
The outer edge of each of the base openings of the balloon suction communication hole and the base opening of the channel suction communication hole and the inner peripheral surface of the cylinder body define the outer edge of each of the base opening. It may be sealed by a sealing member arranged so as to surround, in which case, a sealing member that seals the outer edge of each of the two-sided openings has two holes at positions corresponding to the positions of the two-sided openings. It may be formed by one formed member.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment of the present invention will be described with reference to the drawings.
FIG. 2 shows an ultrasonic endoscope according to the present invention, in which an operation unit 2 is communicated with a base end of a flexible insertion unit 1, and an ultrasonic signal is emitted around an axis at a distal end of the insertion unit 1. A radial scanning ultrasonic probe 3 to be received is arranged, and an optical observation window 4 for optically observing the front is arranged on the distal end surface.
[0010]
The distal end portion of the insertion section 1 has a balloon which is inflated and decompressed with degassed water or the like so that there is no air layer between the ultrasonic probe 3 and the part to be inspected which has poor transmission of ultrasonic signals. 5 is attached so as to surround the ultrasonic probe 3.
[0011]
In the insertion portion 1, a forceps channel 6 for inserting and removing forceps, an injection tool, and the like is inserted and disposed over the entire length, and a forceps channel suction port 6a, which is a distal end opening, is inserted outside the balloon 5. The forceps insertion port 6b is disposed on the distal end surface of the section 1 and is located near the connection between the insertion section 1 and the operation section 2.
[0012]
Further, a channel suction pipe 7 that is connected to the forceps channel 6 near the base end thereof is connected to a suction operation valve 10 disposed in the upper half of the operation unit 2.
[0013]
In the insertion section 1, a balloon suction line 8 for sucking deaerated water filled in the balloon 5 and the like are also inserted and arranged. The distal end of the insertion section 1 opens inside the balloon 5, and the proximal end of the balloon suction line 8 is connected to a suction operation valve 10. Reference numeral 9 denotes a suction source conduit for communicating and connecting the suction operation valve 10 and a suction source (not shown).
[0014]
FIG. 1 shows a standby state of the suction operation valve 10, in which a cylinder body 11 arranged in the operation section 2 is fixed to the operation section 2 by a fixing nut 12 so as to open outward. 13 is an O-ring for sealing. In addition, in each figure, the kind of the sealing member which is mounted in a crushed state with elasticity is illustrated before the crushing.
[0015]
The end of the suction source pipe 9 communicating with the suction source is openly connected to the side wall surface of the intermediate portion of the cylinder body 11 (connection opening 9a). The base end of the balloon suction pipe 8 is connected to the side wall surface of the cylinder body 11 at a position substantially opposite to the connection opening 9a of the suction source pipe 9, and the base end of the channel suction pipe 7 is connected to the cylinder body. 11 is open-connected to the bottom surface.
[0016]
The piston body 14 is inserted into the cylinder body 11 so as to be able to advance and retreat in the axial direction, and an operation button 16 is provided on the head of the piston body 14 projecting outward from the operation unit 2 via a connection ring 15. Installed.
[0017]
The piston body 14 and the operation button 16 are urged outward integrally by a first compression coil spring 21 and a second compression coil spring 22 arranged in series with the intermediate spring receiver 18 interposed therebetween. The spring constant of the second compression coil spring 22 is set to be several times larger than that of the first compression coil spring 21.
[0018]
The proximal spring receiver 19 that receives the proximal end of the second compression coil spring 22 also serves as a stopper that prevents the piston body 14 from falling out of the cylinder body 11 beyond a predetermined state.
[0019]
A first cover cylinder 17 that covers the first compression coil spring 21 so that the first compression coil spring 21 cannot be seen from the outside is attached to the intermediate spring receiver 18, and a second compression coil spring 22 is mounted to the proximal spring receiver 19. A second cover cylinder 20a that covers the cover so as not to be seen from the outside is attached.
[0020]
Then, an inner peripheral portion of a lower end portion of a locking ring 20b made of a resilient plastic material or a rubber material lined integrally with the second cover cylinder 20a is hooked and engaged with the protruding end portion of the fixed nut 12. The unit including the piston body 14 and the operation button 16 is fixed to the cylinder body 11.
[0021]
Therefore, if the engagement with the fixing nut 12 is released by elastically deforming the locking ring 20b, the piston body 14 together with the operation button 16 and the like can be pulled out from the cylinder body 11.
[0022]
A linear groove 25 is formed in the inner peripheral portion of the cylinder body 11 in a direction parallel to the axis so as to engage with a pin 26 projecting from the side surface of the piston body 14. In FIG. 11, rotation around the axis is prevented. Further, a portion of the circumferential groove 27 for ventilation formed on the outer peripheral portion of the piston body 14 communicates with the outside air via the linear groove 25 and the like.
[0023]
At the innermost position of the piston body 14, an annular sealing member 28 made of an elastic rubber material or the like is fitted into a circumferential groove formed in the piston body 14, and the cylinder body 11 is closed. Is sealed over the entire circumference at that position.
[0024]
The piston body 14 has a channel suction communication hole 31 for communicating the suction source line 9 and the channel suction line 7, and a balloon suction communication for communicating the suction source line 9 and the balloon suction line 8. The holes 32 are formed at positions where they do not interfere with each other.
[0025]
Among them, the channel suction communication hole 31 is formed in an L-shape, one end of which is opened on the end face on the back side of the piston body 14, and the original side opening 31 a which is the opposite opening is opened on the side surface of the piston body 14. ing.
[0026]
The balloon suction communication hole 32 is formed so as to penetrate the piston body 14, and the base opening 32 a of the balloon suction communication hole 32 is aligned with the base opening 31 a of the channel suction communication hole 31. The side is open.
[0027]
Such a base opening 31a of the channel suction communication hole 31 and a base opening 32a of the balloon suction communication hole 32 are arranged adjacent to the side surface of the piston body 14 in the axial direction, and the both base openings are provided. The gap between the outer edge of each of 31a, 32a and the inner peripheral surface of the cylinder body 11 is sealed by a base opening seal member 33 arranged so as to surround the respective outer edges of the base openings 31a, 32a. .
[0028]
As shown in FIG. 3, the base opening seal member 33 is made of an elastic rubber material or the like having two holes formed at positions corresponding to the positions of the base openings 31a and 32a. It is formed by two members, and is fitted into a concave portion formed on the outer peripheral portion of the piston body 14 according to its outer shape.
[0029]
Returning to FIG. 1, the outer peripheral portion of the piston body 14 closes the proximal opening 8 b of the balloon suction pipe 8 that opens on the inner peripheral surface of the piston body 14 in the standby state illustrated in FIG. 1. A resilient plug 34 is attached.
[0030]
In addition, when the piston body 14 is pushed into the cylinder body 11 to the maximum extent, the end opening of the balloon suction communication hole 32 (original opening 32a) surrounds the base end opening 8b of the balloon suction conduit 8. A cylindrical seal member 35 made of a resilient material is attached so as to surround the end opening on the side opposite to the end.
[0031]
In the standby state shown in FIG. 1, the suction operation device of the ultrasonic endoscope according to the embodiment configured as described above allows the outside air to flow from the straight groove 25 and the circumferential groove 27 for ventilation through the suction source pipe 9. The suction is performed by the suction source, and the suction from the channel suction line 7 and the balloon suction line 8 is prevented by the annular seal member 28 for full-circle sealing and the plug 34.
[0032]
In this state, when the operation button 16 is pressed with a fingertip to push the piston body 14 into the cylinder body 11, only the first compression coil spring 21 having a small spring constant is first compressed as shown in FIG.
[0033]
Then, a large resistance acts on the finger that operates the operation button 16 at the position where the first compression coil spring 21 has been compressed and the second compression coil spring 22 also starts to be compressed. The base opening 31a of the channel suction communication hole 31 is located at a position opposing the connection opening 9a of the suction pipe 9 formed in the cylinder body 11.
[0034]
As a result, the channel suction pipe 7 and the suction source pipe 9 communicate with each other through the channel suction communication hole 31, and contaminants and the like in the body are sucked into the suction source from the forceps channel suction port 6a. Then, when the finger is released from the operation button 16, the operation returns to the original standby state.
[0035]
Further, when the operation button 16 is pressed with a fingertip, the second compression coil spring 22 is also compressed following the first compression coil spring 21 as shown in FIG. Until it is pushed into the cylinder body 11.
[0036]
Then, the original opening 32a of the balloon suction communication hole 32 formed in the piston body 14 reaches a position facing the connection opening 9a of the suction source pipe 9, and at the same time, is sealed by the cylindrical seal member 35. The balloon suction communication hole 32 and the balloon suction pipe 8 communicate with each other.
[0037]
As a result, the balloon suction pipe 8 and the suction source pipe 9 communicate with each other through the balloon suction communication hole 32, and the degassed water and the like in the balloon 5 are sucked by the suction source and the balloon 5 can be contracted. . Then, when the finger is released from the operation button 16, the operation returns to the original standby state.
[0038]
【The invention's effect】
According to the present invention, when the piston body is pushed into the cylinder body, the suction source pipe is located at a position where the state where the compression coil spring having a small spring constant is compressed to the state where the coil spring having a large spring constant is also compressed is compressed. The opening of the channel suction communication hole faces the opening, and the connection opening of the suction source pipe and the opening of the balloon suction communication hole face each other at the position where both coil springs are compressed, Since the suction from the forceps channel suction port and the suction from the balloon suction port can be easily switched, and an extremely simple structure can be adopted, assembly and the like are easy and operation failure is unlikely to occur.
[Brief description of the drawings]
FIG. 1 is a vertical sectional view of a suction operation device of an ultrasonic endoscope according to an embodiment of the present invention in a standby state.
FIG. 2 is a side view of the ultrasonic endoscope according to the embodiment of the present invention.
FIG. 3 is a perspective view of a suction opening device of the ultrasonic endoscope according to the embodiment of the present invention, which is a single-sided opening seal member.
FIG. 4 is a longitudinal sectional view showing a suction state from a forceps channel suction port of the suction operation device of the ultrasonic endoscope according to the embodiment of the present invention.
FIG. 5 is a longitudinal sectional view showing a suction state from a balloon suction port of the suction operation device of the ultrasonic endoscope according to the embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Insertion part 2 Operation part 3 Ultrasonic probe 4 Observation window 5 Balloon 6 Forceps channel 6a Forceps channel suction port 7 Channel suction pipe 8 Balloon suction pipe 8a Balloon suction port 9 Suction source pipe 9a Connection opening 10 Suction operation valve 11 Cylinder body 14 Piston body 16 Operation button 21 First compression coil spring (compression coil spring with small spring constant)
22 Second compression coil spring (compression coil spring with large spring constant)
31 Channel suction communication hole 31a Base opening 32 Balloon suction communication hole 32a Base opening 34 Plug 35 Cylindrical seal member

Claims (3)

At the tip of the insertion portion, an ultrasonic probe and an optical observation window are provided side by side, and a balloon suction port opened inside the balloon attached to the tip of the insertion portion and a forceps channel suction port opened outside the balloon are provided. An ultrasonic endoscope provided, wherein an operation unit connected to a base end of the insertion unit switches between a suction operation from the balloon suction port and a suction operation from the forceps channel suction port. In the suction operation device of the ultrasonic endoscope in which the suction operation valve is arranged,
The suction operation valve has a cylinder body connected to a suction source pipe communicating with a suction source, a balloon suction pipe communicating with the balloon suction port, and a channel suction pipe communicating with the forceps channel suction port, A piston body that switches between a state in which the balloon suction pipe communicates with the suction source pipe and a state in which the channel suction pipe communicates with the suction source pipe by being moved in the axial direction in the cylinder body,
The suction source pipeline is connected to the side wall of the cylinder body by opening,
The piston body has a balloon suction communication hole for communicating the suction source line and the balloon suction line, and a channel suction communication hole for communicating the suction source line and the channel suction line. Is drilled in a position that does not interfere with each other,
On the side surface of the piston body, the base opening of the balloon suction communication hole and the base opening of the channel suction communication hole for connecting to the connection opening of the suction source conduit are arranged side by side in the axial direction,
Two compression coil springs having different spring constants are arranged in series in a state of being urged in a direction to push out the piston body from the cylinder body, and when the piston body is pushed into the cylinder body, the spring constant is reduced. At the position where the coil spring having a large spring constant is also compressed from the state where the small compression coil spring is compressed, the connection opening of the suction source pipe and the source side opening of the channel suction communication hole face each other. A suction operation device for an ultrasonic endoscope, wherein a connection opening of the suction source pipe and a base opening of the balloon suction communication hole face each other at a position where the coil spring is compressed. Between the outer edge of each of the base opening of the balloon suction communication hole and the base opening of the base opening of the channel suction communication hole and the inner peripheral surface of the cylinder body, each of the base opening is The suction operation device for an ultrasonic endoscope according to claim 1, wherein the suction operation device is sealed by a seal member disposed so as to surround the outer edge. 3. The super-seal according to claim 2, wherein the sealing member for sealing the outer edge of each of the two-side openings is formed by one member having two holes formed at positions corresponding to the positions of the two-side openings. Suction endoscope suction operation device.

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