JPS6323774B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in an endoscope treatment instrument lifting device that regulates the direction in which a treatment instrument is led out.

In general, an endoscope's treatment instrument lifting device pushes and pulls a treatment instrument elevator provided at the distal end component by an operation mechanism provided in the hand operation unit via an operation wire, and the treatment instrument elevator is moved. It is configured so that it can be rotated to select the direction in which the treatment instrument is led out. By the way, the wire guide tube through which the operating wire is inserted has an opening on the tip component side, and therefore, when the tip component is inserted into the body cavity, gastric juices, mucus, etc. may enter the wire guide tube through the opening. There are things to do. Moreover, since the wire guide tube is thin, liquid that has once entered tends to remain there. On the other hand, since endoscopes are expensive and used by many patients, it is desirable to thoroughly clean the inside of the wire guide tube and the portions communicating therewith.

For this reason, a system has been proposed that allows cleaning even the inside of the wire guide tube (Japanese Utility Model Publication No. 55-28241 or Japanese Utility Model Application No. 54-9593). In the device disclosed in Japanese Utility Model Publication No. 55-28241, a member for preventing the outflow of a liquid substance that slides along the inner wall of the forceps operating section with a cleaning port connected to the cable protection tube is mounted. However, when the end surface of the cable side of the liquid spill prevention member is closer to the hand than the cleaning port, a dead-end space is created inside the forceps operating section, and cleaning water cannot be injected from the cleaning port. The water did not flow well in the dead-end alley, causing stagnation and not being able to wash the area thoroughly. In addition, even if the liquid spill prevention member is positioned in front to prevent the formation of dead-end spaces, if liquid is injected at high pressure from the cleaning port, the liquid spill prevention member will move toward the hand due to hydraulic pressure. In the end, a dead-end space is created. In order to prevent this dead-end space from forming, it is important to firmly hold down the liquid spill prevention member by hand, but the operator cannot be expected to perform this operation reliably. It was practically impossible. Furthermore, there is a drawback that the inner wall of the forceps operating section in this dead-end area cannot be sufficiently cleaned. Moreover, in order to solve this problem, it is possible to move the position of the cleaning port closer to the hand side and install it in the forceps operation part, but in this case, when operating the forceps, the end surface of the cable-like side of the member for preventing liquid spillage is constantly exposed. It is located closer to the tip of the endoscope than the cleaning port. As a result, when the forceps are operated, when the operation wire is pulled on the tip component side of the wire guide tube, the liquid material outflow prevention member and the inner wall of the forceps operation section cause the wire guide tube to be pulled out like suction by a syringe. It has the disadvantage of inhaling gastric juices and filth.

In addition, in Japanese Utility Model Application Publication No. 54-9593, a rack to which an operating wire is connected and a pinion that meshes with the rack are housed in a watertight case, and a liquid or the like is injected into the watertight case to communicate with the watertight case. It is designed to clean the inside of the wire guide tube.
However, if gastric juices etc. infiltrate into the watertight case, there will be parts in the large watertight case that are difficult to clean, such as racks and pinions, so it is difficult to thoroughly clean these parts. I couldn't do it.

The present invention has been made focusing on the above circumstances,
The purpose of this is to be able to easily and thoroughly clean the wire guide tube through which the operating wire is inserted and the parts that communicate with it.
It is an object of the present invention to provide a treatment tool lifting device for an endoscope that prevents dirt and the like from being sucked into a wire guide tube even when operating forceps.

A first embodiment of the present invention will be described below with reference to FIGS. 1 to 3.

Reference numeral 1 in FIG. 1 is an endoscope, and this endoscope 1 has a flexible insertion section 3 connected to a hand control section 2, and a light guide cable 4 is further connected to the hand control section 2. There is. In addition, the insertion section 3 has a flexible tube 5.
A distal end component 7 is connected to the distal end of the instrument via a curved tube 6, and the distal end component 7 is provided with a treatment instrument outlet 8, and an illumination window 9 is provided on the side of the treatment instrument outlet 8. and an observation window 10 are arranged in parallel. Furthermore, the tip operation section 2 includes an eyepiece section 11, a treatment instrument insertion opening section 12, switching operation valves 13, 13 for performing air/water supply and suction operations, and an operation mechanism 1, which will be described later.
4 are provided. The eyepiece section 11 is connected to the observation window 10 via an observation image transmission optical system (not shown).
The treatment instrument introduction port 12 is connected to the treatment instrument outlet 8 via an insertion channel 15, so that a treatment instrument such as forceps can be inserted therethrough. Further, an illumination light transmission optical system (not shown) connected to the illumination window 9 is guided to a guide tube 17 of a connector 16 provided at the tip of the light guide cable 4.

On the other hand, a treatment instrument raising stand 18 is provided within the treatment instrument outlet 8, as shown in FIG. This treatment instrument raising stand 18 has its bottom side end pivotally connected to a shaft 19, and this rotating end is connected to an operating wire 2, which will be described later.
The ends of 0 are connected. And operation wire 2
By pushing and pulling 0, the treatment instrument raising stand 18 is rotated and the direction in which the treatment instrument is led out from the outlet 8 is regulated. Further, the operating wire 20 is guided to the hand operating section 2 through a flexible wire guide tube 21 that is inserted across the hand operating section 2 and the insertion section 3 . The proximal end of the wire guide tube 21 is connected to one end of a cylindrical guide tube 23 provided in the main body 22 of the proximal operation section 2, as shown in FIG. The other end of the guide tube 23 is connected to a rising wall 25 of a recess 24 formed on the side surface of the hand control section 2.
It is airtightly attached and fixed to the hand control unit 2 and opens to the outside of the hand operation unit 2. Further, a slide tube 27 protruding from a wire operating body 26 is inserted into the guide tube 23 in a tightly slidable manner. Further, the wire operating body 26 is formed with a through hole 28 that communicates linearly with the inside of the slide tube 27.
At the outer end of the through hole 28, a cleaning port 29 is provided which opens toward the outside and can be connected to an injector or inhaler (not shown).

The operation wire 20 is connected to the wire guide tube 2.
1. Guide tube 23, slide tube 27 and through hole 2
8, and its proximal end is fixed to the wire operating body 26.

Further, a pin 30 is provided protruding from the wire operating body 26, and this pin 30 is connected to the aforementioned operating mechanism 14, and the wire operating body 26 is slidably operated by the operating mechanism 14. There is. The operating mechanism 14 is provided exposed on the side surface of the hand-held operating section 2, as shown in FIG. That is, a rotary plate 32 is rotatably mounted coaxially with the shaft 31a of the angle operation knob 31, and the rotary plate 32 is provided with an elongated hole 33 along the radial direction thereof to be engaged with the pin 30. In addition, the rotating plate 32
is provided with an operating arm 34, and by operating this operating arm 34, the rotary plate 32 can be rotated.

Next, the operation of the above embodiment will be explained. First, when using a treatment instrument, it is inserted into the insertion channel 15 from the treatment instrument insertion port 12 on the hand operation unit 2 side, and guided into the body cavity from the treatment instrument outlet 8 along the treatment instrument raising table 18. . Therefore, when the rotary plate 32 is rotated by hooking a finger on the operating arm 34 in the hand-held operating section 2, the wire operating body 26 can be moved by the elongated hole 33 and the pin 30 that engages with the elongated hole 33. In other words, since the wire operating body 26 is restricted to move only linearly by the guide tube 23 into which the slide tube 27 is inserted, the pin 30 moves along the elongated hole 33 and the wire operating body 26 can be moved in a straight line. Thus, by moving the wire operating body 26, the operating wire 20 can be pushed or pulled, and the treatment instrument raising table 18 can be rotated to select the raising angle of the treatment instrument, that is, the guiding direction.

By the way, since the passage for guiding the operating wire 20 opens into the treatment instrument outlet 8, gastric juice, mucus, etc. may enter the inside through this opening.

Therefore, when cleaning the endoscope 1, it is necessary to thoroughly clean the inside of the passage. For this purpose, a syringe or the like containing cleaning water is connected to the cleaning port 29 and the cleaning water is forced into the passage. In other words, the pressurized cleaning water flows from the cleaning port 29 to the through hole 2.
8, it flows out through the inside of the slide tube 27, guide tube 23, and wire guide tube 21 from the opening on the distal end side to the treatment instrument outlet 8. Since there are no blind spots in the flow path, every nook and corner can be thoroughly cleaned. Further, even when operating the forceps, since the wire operating body 26 is provided with the through hole 28 and the cleaning port 29, gastric juice and filth are not sucked from the distal end of the wire guide tube 21. Even when the cleaning port 29 is closed during forceps operation, if the inner diameter of the through hole 28 of the wire operating body 26 is made large, the wire operating body 26 can be slid. Since the rate of change in volume of the space within the conduit through which the operating wire 20 communicates can be reduced, dirt and the like will not be sucked from the tip of the wire guide tube 21 in the same manner as described above.

FIG. 4 shows a second embodiment of the invention. In this embodiment, a guide tube 23 is provided to protrude into a recess 24, and a slide tube 27 of a wire operating body 26 is slidably fitted on the outer periphery of the guide tube 17. is similar to that of the first embodiment.

FIG. 5 shows a third embodiment of the invention. In this embodiment, a sealing member 35 made of, for example, an O-ring is interposed between the guide tube 23 and the slide tube 27 in the first embodiment, and cleaning liquid etc. This is to ensure that leakage is prevented.

Furthermore, the present invention is not limited to the above-mentioned embodiments; for example, a leak-preventing cap may be provided at the washing port. If this is done, body fluids such as gastric juices will leak out while the endoscope is in use. It can be prevented from flowing out of the cleaning port, making it sanitary.

In addition, the means for moving and operating the wire operating body is not limited to the link mechanism described above. For example, a rack is provided integrally with the wire operating body, and an operating mechanism that moves the wire operating body by a pinion that engages with the rack is configured. You may.

As explained above, the present invention can clean the inside of the passage by injecting cleaning water into the passage through which the operation wire is inserted, and there is no need to create a dead-end space in the passage, so it can be used in every corner. Can be thoroughly washed. In addition, there is no need to place the wire operating body in a specific location to clean it, and it can be cleaned as is, no matter what condition it is in. In addition, it is easy to clean without any special effort, and high-pressure cleaning water is injected. You can reliably clean it as is. In addition, when operating the forceps, the wire operating body is provided with a through hole, so fluids and dirt inside the body will not be sucked into the wire guide tube, and dirt on the operating wire and wire guide tube can be extremely reduced. can.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of an endoscope showing a first embodiment of the present invention, FIG. 2 is a perspective view of a hand-operated portion of the same embodiment, and FIG. 3 is a perspective view of an endoscope of the same embodiment. FIG. 4 is a side sectional view of a hand-held operating section according to a second embodiment of the present invention, and FIG. 5 is a side sectional view of a hand-held operating section according to a third embodiment of the present invention. 1... Endoscope, 2... Hand operation section, 3... Insertion section, 4
...Light guide cable, 5...Flexible tube, 6...Curving tube, 7...Tip component, 8...Treatment instrument outlet, 9...Illumination window, 10...Observation window, 11...Eye piece, 12...Treatment instrument insertion Mouth portion, 13...Switching operation valve, 14...Operation mechanism, 15...Insertion channel, 16...Connector,
17...Guide tube, 18...Treatment instrument elevator, 19...
Shaft, 20... Operating wire, 21... Wire guide tube, 2
2... Main body, 23... Guide tube, 24... Recess, 25...
Rising wall, 26...Wire operation body, 27...Slide tube, 28...Through hole, 29...Washing port, 30...Pin, 3
DESCRIPTION OF SYMBOLS 1... Angle operation knob, 32... Rotating plate, 33... Long hole, 34... Operating arm, 35... Seal member.

Claims (1)

[Claims] 1. In an endoscope treatment instrument lifting device in which a treatment instrument raising table in the distal end component is raised by an operation mechanism on the hand operation unit side via an operation wire, the operation wire is inserted through the operation wire. A guide tube that communicates with the wire tube that guides the wire is provided in the hand operation section, and a wire operation body is slid into this guide tube by an operation mechanism, and one end of the wire operation body is connected to the guide tube. A treatment instrument lifting device for an endoscope, characterized in that a through hole is provided in communication with the wire operating body, and the other end thereof is always open to the inside of the guide tube regardless of the sliding position of the wire operating body.