JP4424978B2 - Ultrasound endoscope suction operation device - Google Patents

Description

  The present invention relates to a suction operation device for an ultrasonic endoscope.

  In an ultrasonic endoscope, an inflatable balloon is generally attached to the distal end of the insertion section, and a balloon suction opening that opens inside the balloon and a channel suction opening that opens outside the balloon are provided at the distal end of the insertion section. A suction operation device capable of switching between a suction operation from the balloon suction port and a suction operation from the channel suction port is disposed in the operation unit.

  Conventionally, such a suction operation device is a combination of an operation valve device that pushes the operation button and a switching lever that switches the piping that acts on the suction, but this makes the operation complicated, so the operation button must be pushed in. The operation is divided into two stages so that the state of suction from the channel suction port and the state of suction from the balloon suction port can be switched between the state where the operation button is pushed to the middle and the state where the operation button is pushed to the full. (For example, patent document 1).

The suction from the channel suction port is performed relatively frequently during the endoscope operation, and the suction from the balloon suction port is mostly performed only at the end of the ultrasound observation. When being pushed to the position, suction from the channel suction port is performed, and when the piston body is further pushed from this state, suction from the balloon suction port is performed.
Patent No. 3017957

  However, in the suction operation valve device of the conventional ultrasonic endoscope as described in Patent Document 1, two cylinder bodies, that is, a cylinder body communicating with the channel suction port and a cylinder body communicating with the balloon suction port are arranged in parallel. Since the piston bodies that are arranged side by side and are advanced and retracted by a common operation button are arranged in each cylinder body, two operation valve mechanisms divided into two axes are operated with one operation button. However, the structure is extremely complicated and the assembly is troublesome, and at the same time, there are drawbacks such as the possibility of malfunctions.

  Therefore, one piston body is placed in one cylinder body so that it can advance and retreat in the axial direction, and the suction operation from the channel suction port and the suction from the balloon suction port can be performed by pushing the operation button halfway or fully. It can be considered that the operation is switched.

  However, simply adopting such a configuration can completely seal the balloon suction port side when the piston body is pushed to the intermediate position in order to perform suction from the channel suction port. In a state where the state is being pushed from the standby state to the state, the balloon suction port side is unsealed and suction leakage occurs, and although it is a small amount, it is also sucked from the balloon suction port and the balloon is deflated.

  Therefore, whenever an operation for suctioning from the channel suction port is performed while inflating the balloon and performing ultrasonic observation, a water supply operation for re-expanding the balloon is required. Becomes very troublesome.

  Therefore, the present invention can switch between the state of suction from the channel suction port and the state of suction from the balloon suction port only by pressing the operation button, and the configuration is simple and operation failure is unlikely to occur. An object of the present invention is to provide a suction operation device for an ultrasonic endoscope that does not cause suction leakage from the balloon suction port side when an operation for performing suction from the suction port is performed.

  In order to achieve the above object, a suction operation device for an ultrasonic endoscope according to the present invention includes a balloon suction port that opens to the inside of a balloon with an inflatable and inflatable balloon attached to the distal end of the insertion portion, and an outside of the balloon. A suction operation device for an ultrasonic endoscope provided at the distal end of the insertion portion with a channel suction opening that is open to the insertion portion, wherein the operation portion connected to the proximal end of the insertion portion is sucked from the balloon suction port; A suction operation valve for switching the state of suction from the channel suction port is arranged. The suction operation valve includes a suction source line communicating with the suction source, a balloon suction line communicating with the balloon suction port, and a channel suction. The cylinder body connected to the channel suction line communicating with the mouth, and the push-in operation moves in the axial direction within the cylinder body, and the balloon suction line communicates with the suction source line. In which a piston body for switching between a state and a state in which a channel suction line communicates is provided, a piston outer cylinder formed in a cylindrical shape and inscribed in the cylinder body, and an axis line inscribed in the piston outer cylinder A piston inner cylinder that can be moved forward and backward is provided, and an operation button for pushing the piston outer cylinder and the piston inner cylinder in cooperation with each other is attached to the head of the piston body, and the operation button is not pushed. In the state, the space between the suction source line and the balloon suction line is closed by the piston outer cylinder, and at the same time, the space between the suction source line and the channel suction line is closed by the piston inner cylinder. When the push operation is performed to the middle position of the push operation range, only the piston inner cylinder of the piston outer cylinder and the piston inner cylinder is moved in the axial direction, The suction source line and the channel suction line are in communication with each other while maintaining the state in which the space between the suction line and the balloon suction line is closed by the piston outer cylinder, and the operation button is pushed further from that state. When operated, the piston outer cylinder is moved in the axial direction together with the piston inner cylinder, so that the space between the suction source line and the channel suction line is closed, and the space between the suction source line and the balloon suction line is closed. Is intended to communicate.

  According to the present invention, when the piston body is provided with a piston outer cylinder inscribed in the cylinder body and a piston inner cylinder inscribed in the piston outer cylinder, the operation button is pushed to the middle position of the pushing operation range. In the piston outer cylinder and the piston inner cylinder, only the piston inner cylinder is moved in the axial direction so that the suction source pipe and the channel suction pipe communicate with each other, and the suction source pipe and the balloon suction pipe If the operation button is further pushed in, the suction source line and the balloon suction line communicate with each other, so that the operation from the channel suction port can be done only by pushing the operation button. The suction state can be switched between the suction state and the suction state from the balloon suction port, and suction is performed from the channel suction port with a simple configuration that is unlikely to cause malfunction. Operation to suction leak from the balloon suction port side does not occur when carried out.

  The piston body is provided with a piston outer cylinder formed in a cylindrical shape and inscribed in the cylinder body, and a piston inner cylinder inscribed in the piston outer cylinder and capable of moving back and forth in the axial direction, and the piston outer cylinder and the piston inner cylinder. Attach an operation button for the push-in operation in cooperation to the head of the piston body, and in a standby state where the operation button is not pushed-in, the space between the suction source line and the balloon suction line is blocked by the piston outer cylinder. At the same time, if the piston inner cylinder closes the space between the suction source pipe and the channel suction pipe, and the operation button is pushed to the middle position of the pushing operation range, the piston outer cylinder and the piston inner cylinder While only the piston inner cylinder is moved in the axial direction, the suction pipe and the balloon suction pipe are kept closed by the piston outer cylinder When the operation line is further pushed in from the state where the pipe line and the channel suction pipe line communicate with each other, the piston outer cylinder is moved in the axial direction together with the piston inner cylinder, so that the suction source pipe line and the channel are The suction line is closed, and the suction source line and the balloon suction line communicate with each other.

Embodiments of the present invention will be described with reference to the drawings.
FIG. 3 shows an ultrasonic endoscope according to the present invention, in which an operation unit 2 is connected to a proximal end of a flexible insertion unit 1, and an ultrasonic signal is generated around the axis at the distal end of the insertion unit 1. An ultrasonic probe 3 for radial scanning to be received is disposed, and an optical observation window 4 for optically observing the front is disposed on the distal end surface.

  In addition, the distal end portion of the insertion portion 1 is inflated and contracted by deaerated water or the like so that there is no air layer with poor ultrasonic signal transmission between the ultrasonic probe 3 and the test portion. 5 is attached to surround the ultrasonic probe 3.

  A forceps channel 6 for inserting and removing forceps, an injection tool, and the like is inserted through the entire length in the insertion portion 1, and a channel suction port 6 a that is a distal end opening of the forceps channel 6 is located outside the balloon 5. 1 is disposed on the front end surface.

  The forceps insertion port 6b is disposed in the vicinity of the connecting portion between the insertion portion 1 and the operation portion 2, and a channel suction conduit 7 connected to the forceps channel 6 in the vicinity of the proximal end thereof is provided in the operation portion. 2 is connected to a suction operation valve 10 arranged in the upper half of the second half.

  A balloon suction pipe 8 and the like for sucking deaerated water filled in the balloon 5 are also inserted in the insertion portion 1, and a balloon suction port 8 a that is a distal end opening of the balloon suction pipe 8 is provided. The distal end of the insertion portion 1 opens inside the balloon 5, and the proximal end of the balloon suction conduit 8 is connected to the suction operation valve 10 in the operation portion 2. Reference numeral 9 denotes a suction source pipe line that connects the suction operation valve 10 and a suction source (not shown) in communication.

  FIG. 4 shows a standby state of the suction operation valve 10, and the cylinder body 11 arranged in the operation unit 2 is fixed to the operation unit 2 by a fixing nut 12 so as to open outward. Reference numeral 13 denotes an O-ring for sealing. In each figure, the kind of seal member that is mounted in a crushed state with elasticity is shown in a state before being crushed.

  The end portion of the suction source pipe line 9 communicating with the suction source is 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 open-connected to the side wall surface of the cylinder body 11 (base end opening 8b) at a position substantially opposite to the connection opening 9a of the suction source pipe 9, and the channel suction pipe 7 Is connected to the bottom surface of the cylinder body 11 by opening.

  The piston body, which is inserted into the cylinder body 11 so as to be able to advance and retract in the axial direction, is formed in a cylindrical shape and is in contact with the cylinder body 11, and the piston outer cylinder 14 is inscribed in the piston outer cylinder 14 so as to be able to advance and retract in the axial direction. The piston inner cylinder 15 is arranged coaxially.

  However, in the window portion 14 a formed in the intermediate portion of the piston outer cylinder 14, the intermediate body portion 15 a of the piston inner cylinder 15 is formed thick so as to be flush with the outer surface of the piston outer cylinder 14.

  Further, the inner peripheral surface portion of the cylinder body 11 surrounding the portion is formed to be slightly thick so that a gap is formed between the outer peripheral surfaces of the piston outer cylinder 14 and the intermediate barrel portion 15a of the piston inner cylinder 15 in the standby state. Has been.

  The heads of the piston outer cylinder 14 and the piston inner cylinder 15 protrude from the mouth of the cylinder body 11 that opens to the outer surface of the operation unit 2, and the piston inner cylinder 15 is operated via a connecting shaft 18. A button 16 is attached.

  A first compression coil spring 21 is mounted between a spring receiving portion 14b formed in a flange shape on the head portion of the piston outer cylinder 14 and the operation button 16, so that the piston inner cylinder 15 is located outside the piston. It is biased in a direction (upward in FIG. 4) that protrudes outward from the tube 14. And the 1st cover cylinder 17 which covers so that the 1st compression coil spring 21 is not visible from the outside is attached to the spring receiving part 14b.

  In addition, a second compression coil spring 22 set to a spring constant several times larger than that of the first compression coil spring 21 is arranged in series with the first compression coil spring 21, and the piston outer cylinder is arranged. 14 spring receiving portions 14b are urged outward.

  The piston retaining ring 20A that receives the proximal end side of the second compression coil spring 22 serves as a stopper that prevents the piston outer cylinder 14 and the piston inner cylinder 15 from coming out of the cylinder body 11 beyond a predetermined state. The second compression coil spring 22 also has a cover function for preventing the second compression coil spring 22 from being seen from the outside.

  Further, the inner peripheral portion of the lower end portion of the locking ring 20B made of elastic plastic material or rubber material lined integrally with the piston retaining ring 20A is hooked and engaged with the protruding end portion of the fixing nut 12, and the piston A unit including an outer cylinder 14, a piston inner cylinder 15, an operation button 16 and the like is fixed to the cylinder body 11.

  Therefore, if the engagement ring 20B is elastically deformed to release the engagement with the fixing nut 12, the piston outer cylinder 14 and the piston inner cylinder 15 can be pulled out from the cylinder body 11 together with the operation button 16 and the like.

  At the innermost position of the piston outer cylinder 14 (lower end position in FIG. 4), an annular all-round seal annular seal member 28 made of a resilient rubber material or the like is formed on the outer periphery of the piston outer cylinder 14. It fits into the circumferential groove and seals the entire periphery of the cylinder body 11 at that position.

  Further, at the innermost position of the piston inner cylinder 15, an O-ring 26 made of a resilient rubber material or the like is fitted into a circumferential groove formed in the outer peripheral portion of the piston inner cylinder 15, and the piston outer cylinder 14. The inner peripheral surface of each of the two is sealed at the position over the entire periphery.

  A channel suction communication hole 31 for communicating the suction source pipe line 9 and the channel suction pipe line 7 is formed at a position near the rear end of the piston inner cylinder 15, and is formed in the intermediate body part 15 a that does not interfere therewith. Is formed with a balloon suction communication hole 32 for allowing the suction source pipe line 9 and the balloon suction pipe line 8 to communicate with each other.

  Of these, the channel suction communication hole 31 is formed in an L shape having one end opened to the end face on the back side of the piston inner cylinder 15, and the original side opening 31 a that is the opening on the opposite side is the side surface of the piston inner cylinder 15. Is open.

  The balloon suction communication hole 32 is formed so as to penetrate the intermediate body portion 15a of the piston inner cylinder 15 in a direction perpendicular to the axis, and the original opening 32a of the balloon suction communication hole 32 is formed on the side surface of the intermediate body portion 15a. Is open.

  An outer opening seal member for sealing between the inner peripheral surface of the cylinder body 11 at the outer edge portion of the original opening 32 a of the balloon suction communication hole 32 when being in close contact with the inner peripheral surface of the cylinder body 11. 33 is attached.

  Further, at the outer edge of the opening opposite to the balloon suction communication hole 32, the piston outer cylinder 14 and the piston inner cylinder 15 are pushed into the cylinder body 11 to the maximum extent, and the balloon suction pipe 8 is provided. An annular seal member 35 made of an elastic material is attached so as to surround the proximal end opening 8b.

  The piston outer cylinder 14 is provided with a communication opening 30 at a position facing the connection opening 9a of the suction source pipe line 9 in the standby state, and an annular sealing member 29 for side surface opening sealing disposed at the outer edge thereof. Seals between the inner peripheral surface of the cylinder body 11.

  Further, at a position on the opposite side across the axis, there is an elastic plug so that the base end opening 8b of the balloon suction pipe 8 that opens to the inner peripheral surface of the cylinder body 11 is closed in the standby state. 34 is attached.

  In the ultrasonic endoscope suction operation device according to the embodiment configured as described above, in the standby state shown in FIG. 4, the piston outer cylinder 14 and the piston inner cylinder 15 are connected to the second compression coil spring 22 and the first compression coil spring 22. The compression coil springs 21 are pushed up to contact with the piston retaining ring 20A.

  The outside air is sucked from the gaps between the members constituting the suction operation valve 10 through the suction source pipe 9 to the suction source, and suction from the channel suction pipe 7 and the balloon suction pipe 8 It is blocked by the annular seal member 28, the O-ring 26, the plug 34, and the like.

  In this state, when the operation button 16 is pushed in with the fingertip, as shown in FIG. 1, only the first compression coil spring 21 having a small spring constant starts to be compressed, and the piston inner cylinder 15 is pushed back accordingly. Go.

  Then, as shown also in FIG. 2 illustrating the piston outer cylinder 14 and the piston inner cylinder 15 in that state, the window side 14a in which the original opening 31a of the channel suction communication hole 31 is formed in the piston outer cylinder 14; A state of communicating across both the communication openings 30 is established, and suction of outside air and suction from the channel suction conduit 7 are mixed and performed.

  In this state, since the piston outer cylinder 14 does not move at all, the proximal end opening 8b of the balloon suction conduit 8 is kept completely closed by the plug 34. Therefore, suction from the balloon suction conduit 8 is not performed at all, and the bulging state of the balloon 5 is not affected.

  As shown in FIG. 5, when the operation button 16 reaches a position where the first compression coil spring 21 has been compressed and the second compression coil spring 22 has started to be compressed, the operation button 16 is operated. A large resistance acts on the finger, and at that time, the original side opening 31 a of the channel suction communication hole 31 formed in the piston inner cylinder 15 comes to a position facing the communication opening 30 formed in the piston outer cylinder 14. .

  As a result, the channel suction pipe line 7 and the suction source pipe line 9 communicate with each other via the channel suction communication hole 31 and the communication opening 30, and sewage or the like in the body passes from the channel suction port 6 a at the distal end of the insertion portion to the suction source. Sucked.

  In this state, the piston outer cylinder 14 is not yet moved, and if the finger is released from the operation button 16 in this state, the original standby state is restored. Therefore, only the suction operation from the channel suction line 7 can be performed while the base end opening 8b of the balloon suction line 8 is completely closed.

  When the operation button 16 is pushed in with further force applied to the fingertip from the state shown in FIG. 5, the second compression coil spring 22 is also compressed following the first compression coil spring 21, as shown in FIG. The piston outer cylinder 14 is pushed into the cylinder body 11 together with the piston inner cylinder 15.

  Then, the stopper 34 moves from a position facing the proximal end opening 8b of the balloon suction pipe 8, and instead of that, the balloon suction communication hole 32 formed in the intermediate body 15a of the piston inner cylinder 15 is replaced with the balloon suction pipe. The channel 8 and the suction source pipe 9 are set to communicate with each other, and the channel suction pipe 7 is closed by an all-round seal annular seal member 28, an O-ring 26, a side opening seal annular seal member 29, and the like. become.

  As a result, degassed water or the like in the balloon 5 can be sucked into the suction source from the balloon suction port 8a at the distal end of the insertion portion, and the balloon 5 can be contracted. If the finger is released from the operation button 16, FIG. After the suction state from the channel suction line 7, the state returns to the standby state shown in FIG.

It is the longitudinal cross-sectional view of the state where the operation button started pushing operation in the suction operation device of the ultrasonic endoscope of the embodiment of the present invention. It is a perspective view which shows only the piston outer cylinder and piston inner cylinder in the state which the operation button started pushing operation in the suction operation apparatus of the ultrasonic endoscope of the Example of this invention. 1 is a side view showing an overall configuration of an endoscope according to an embodiment of the present invention. It is a longitudinal cross-sectional view of the standby state in the suction operation device of the ultrasonic endoscope of the embodiment of the present invention. It is a longitudinal cross-sectional view of the state attracted | sucked from a channel suction conduit in the suction operation apparatus of the ultrasonic endoscope of the Example of this invention. It is a longitudinal cross-sectional view of the state attracted | sucked from a balloon suction conduit in the suction operation apparatus of the ultrasonic endoscope of the Example of this invention.

Explanation of symbols

5 Balloon 6a Channel suction port 7 Channel suction conduit 8 Balloon suction conduit 8a Balloon suction conduit 9 Suction source conduit 10 Suction operation valve 11 Cylinder body 14 Piston outer cylinder 14a Window portion 14b Spring receiving portion 15 Piston inner cylinder 15a Intermediate trunk Portion 16 Operation button 21 First compression coil spring 22 Second compression coil spring 31 Channel suction communication hole 32 Balloon suction communication hole 34 Plug body

Claims (2)

An inflatable balloon in which an inflatable balloon is attached to the distal end of the insertion section, and a balloon suction opening that opens inside the balloon and a channel suction opening that opens to the outside of the balloon are provided at the distal end of the insertion section. An endoscope suction operation device,
The operating device coupled to the proximal end of the insertion portion, and the balloon is sucked from the suction port state and the suction operation valve for operating switched between a state in which suction from the channel the suction port is disposed,
The suction operation valve includes a cylinder body connected to a suction source line communicating with a suction source, a balloon suction line communicating with the balloon suction port, and a channel suction line communicating with the channel suction port, and a push-in There is provided a piston body that moves in the axial direction in the cylinder body by operation to switch between a state in which the balloon suction conduit communicates with the suction source conduit and a state in which the channel suction conduit communicates. And
To the piston body, the piston barrel inscribed is formed in a cylindrical shape in the cylinder body and, the piston barrel and retractably piston inner cylinder to axially inscribed provided Rutotomoni, the piston barrel operation buttons for operating push by linking the said piston in the cylinder is attached to the head of the piston body and,
In a standby state in which the operation button is not pushed in, the space between the suction source line and the balloon suction line is closed by the piston outer cylinder, and at the same time, the suction source line and the channel suction line The space between the passage is closed by the piston inner cylinder,
When the operation button is pushed to the middle position of the push-in operation range, only the piston inner cylinder of the piston outer cylinder and the piston inner cylinder is moved in the axial direction, and the suction source pipe line and the balloon While maintaining the state closed between the suction pipe and the piston outer cylinder, the suction source pipe and the channel suction pipe communicate with each other.
When the operation button is further pushed in from this state, the piston outer cylinder is moved in the axial direction together with the piston inner cylinder, thereby closing the space between the suction source pipe and the channel suction pipe. In which the suction source line and the balloon suction line communicate with each other,
The piston inner cylinder is provided with an intermediate body portion that is directly inscribed in the cylinder body when the suction source pipe and the balloon suction pipe are in communication with each other. An ultrasonic endoscope characterized in that a balloon suction communication hole for communicating with a balloon suction conduit is formed in the intermediate body so as to penetrate the piston inner cylinder in a radial direction. Suction operation device. The ultrasonic endoscope suction operation device according to claim 1, wherein a seal member is provided at each of the openings at both ends of the balloon suction communication hole so as to surround the periphery of each of the openings.

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