JPH0451764Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an endoscope in which an elevating table is provided at the distal end component of the insertion section.

[Conventional technology]

In endoscopes having a lifting stand at the distal end of the insertion section as shown in Japanese Patent Application Laid-Open No. 62-65010 and Japanese Utility Model Publication No. 59-10968, an observation window and an illumination window are provided next to the side of the treatment tool outlet, and the upper surface portion where the treatment tool outlet is provided is at the same height as the upper surface portions where the observation window and illumination window are provided.

By the way, when recovering a polyp, stone, foreign body, etc. using a treatment instrument, if the recovered object is small, the grasped object can be pulled out together with the treatment instrument through the insertion channel of the endoscope. If the amount is large, the treatment instrument is not pulled into the insertion channel, and the distal end portion of the treatment instrument that grips the collected object is left protruding and is pulled out of the body together with the endoscope. In other words, if the collected object is large, the distal sheath portion of the treatment instrument should be guided out from the treatment instrument outlet, and the distal sheath portion of the treatment instrument should be guided out of the treatment instrument outlet, and the distal end sheath portion of the treatment instrument should be guided out over the distal end wall portion of the treatment instrument outlet to the tip of the distal end component of the insertion section. Turn around and evacuate the collected items.

However, when the distal sheath portion of the treatment instrument passes over the rising wall of the distal end of the treatment instrument outlet and goes around to the distal side, it inevitably protrudes largely from the upper surface of the distal end component of the endoscope. In other words, since the upper surface portion where the treatment instrument outlet is provided is at the same height as the upper surface portion where the observation window and illumination window are provided, the distal sheath portion of the retrieval treatment instrument protrudes larger than the outer diameter of its distal component. Become.

Therefore, if an attempt is made to remove the entire endoscope from the body, there is a risk that the protruding portion of the treatment instrument may pressurize or damage the inner wall of the stomach or esophagus.

In addition, as shown in Japanese Utility Model Application Publication No. 61-91201, a groove is formed in the rising wall on the distal end side of the treatment instrument outlet so as to open forward, and when the elevator table falls down, the treatment instrument enters the groove and settles. Some things are becoming like this.

However, with this type of endoscope, the groove opens on the distal surface of the distal end component, so when the endoscope is inserted into the body, there is a risk that the body cavity wall may get caught in the groove and cause injury. be.

[Problem that the invention attempts to solve]

In the above-mentioned conventional device, when the endoscope is removed from the body with the retrieving treatment tool protruding from the treatment tool outlet, the protruding portion of the treatment tool presses or damages the inner wall of the stomach, esophagus, etc. In addition, when a groove is provided at the tip of the distal end component, when the endoscope is inserted into the body, the body cavity wall is inserted into the groove.
There was a risk of injury.

This invention was made with attention to the above circumstances,
The purpose of this is to avoid damaging the body cavity wall when inserting the endoscope into the body, and to ensure safe use of the instrument without protruding outward from the endoscope insertion site when retrieving polyps, etc. Our goal is to provide endoscopes that can

〔Example〕

The present invention will be explained below based on an embodiment shown in the drawings.

The endoscope indicated by reference numeral 1 in FIG. 6 includes an insertion section 2 inserted into a body cavity, and an operation section 3 connected to the proximal side of the insertion section 2. The operation section 3 includes an illumination light source (not shown). A light guide cable 4 connected to the device is connected.

The insertion section 2 is formed by connecting a distal end component 7 to the distal end of a flexible tube section 5 via a tubular curved section 6, and the curved section 6 has a plurality of ring-shaped parts as shown in FIG. The curved pieces 8 are rotatably connected via pins 9. The curved piece 8 located at the tip of the curved part 6 is connected to the angle knob 10 provided on the operation part 3.
When the angle knob 10 is rotated, the wires are selectively pulled, and the curved portion 6 moves the pin 9. As a fulcrum, it can be bent in any direction, up, down, left, or right.

As shown in FIGS. 1 and 2, inside this insertion section 2, there is a channel 12 through which a treatment tool 11 such as forceps is inserted, an image guide fiber 13, a light guide fiber 14, and an air supply. A water conduit 15 is inserted through the channel 12, and the forceps insertion port 16 provided in the operating section 3 is inserted into the channel 12.
The image guide fiber 13, the light guide fiber 14, and the air/water supply conduit 15 are connected from the operating section 3 to the illumination light source device via the light guide cable 4.

The main body 7a of the tip structure part 7 is connected to a curved piece 8 at the tip of the curved part 6, and this tip structure part 7
is connected to the channel 12, and the treatment instrument 1 is connected to the channel 12.
A treatment instrument outlet 17 is formed through which the distal end of the treatment instrument 1 is guided outward. The area from the connection part of the tip structure part 7 with the bending piece 8 to the outer periphery of the bending part 6 is covered with a rubber protection member 18, and the tip of the protection member 18 is tied with a thread 19 to form the tip structure. It is fixed to part 7. Further, the outer periphery of the distal end component 7 is covered with a cover 20 made of synthetic resin so as to be continuous with the protective member 18, and an outlet 22 that is continuous with the treatment instrument outlet 17 is formed on one side of the distal end of this cover 20. has been done.

As shown in FIG. 2, the distal end component 7 includes an objective lens 23 connected to the image guide fiber 13 and an illumination lens 24 connected to the light guide fiber 14 adjacent to the treatment instrument outlet 17. At the same time, an air/water supply nozzle 25 connected to the air/water supply conduit 15 is attached. This air/water supply nozzle 25 is provided so as to protrude toward and be close to the objective lens 23.
Note that 26 in FIG. 2 is an adhesive.

Further, inside the treatment instrument outlet 17 of the distal end component 7, a raising stand 28 is provided for raising up the treatment instrument 11 led out from here. One end of the raising table 28 is rotatably supported inside the treatment instrument outlet 17 via a pivot pin 29 in the insertion direction of the treatment instrument 11, that is, in a direction perpendicular to the axial direction of the insertion section 2. . The tip of the operating wire 30 is connected to the rotating tip side of the raising table 28. The proximal end of the operating wire 30 is inserted into an insertion hole 31 formed in the distal end component 7 and guided into the curved section 6, and from here is guided into the operating section 3 through the flexible tube section 5. It's dark. Then, when the raising lever 32 is operated by the operation unit 3 and the operating wire 30 is pulled, the raising table 28 is rotated about the pivot pin 29 as a fulcrum, and the leading-out direction of the treatment instrument 11 is raised at a predetermined angle. I can do it.

The insertion hole 31 through which the operating wire 30 is inserted is provided at a distance A from the pivot point of the elevator 28 in the radial direction of the tip component 7, and this distance A corresponds to the amount of lifting force of the elevator 28. In order to reduce the weight, the distance B is set to be equal to or greater than the distance B from the connection point between the raising platform 28 and the operating wire 30 to the pivot point. For this reason, the insertion hole 31 is provided at a position biased toward the outer circumferential side of the distal end component 7, and the outward opening 31a of the insertion hole 31 is widened in a tapered shape.

Further, a wire guide tube 34 connected to the insertion hole 31 is soldered to the end surface of the tip component 7 on the side of the curved section 6 , and the end of this wire guide tube 34 is led out into the curved section 6 . There is. Wire guide tube 34
A flexible guide tube 35 is coaxially connected to the lead-out portion of the wire guide tube 34.
The guide tube 35 and the guide tube 35 are integrally fixed to each other by being bound with a thread 36 and bonded with an adhesive (not shown). A guide tube 35 is provided over the entire length of the flexible tube section 5 from the curved section 6, and the operating wire 30 is inserted into the guide tube 35.

Note that the outer periphery of the guide tube 35 is covered with a protective sheath 37.

Note that the end surface 7b of the tip component 7 on the opening 22 side
, an adjustment screw 38 that comes into contact with the rotating end surface 28a of the elevator base 28 when the elevator base 28 is raised.
is screwed in, and by increasing or decreasing the screwing amount of this adjustment screw 38, that is, the amount C of protrusion from the end surface 7b of the tip component 7, the raising angle of the raising table 28 can be adjusted.

On the other hand, as shown in FIG. 4, the outlet 22 of the treatment instrument outlet 17 is formed long in the front and back so as to be lined up next to the window part of the optical system described above, that is, the installation part of the objective lens 23 and the illumination lens 24. . As shown in FIG. 1, the distal end wall portion 40 of the outlet 22 is formed with an inclined guiding groove 42 that connects to the guiding groove 41 of the raising table 28 when the treatment instrument 11 is laid down. Further, the upper end of the tip wall portion 40 is a flat surface 4
3, and this flat surface 43 is formed lower than the side end surface 44 of the distal end component 7 where a window for the optical system, etc. is provided. That is, the tip wall portion 40
is a rising wall that hides the front side of the lead-out groove 42.

By the way, when attempting to collect a polyp or other object 50 larger than the inner diameter of the channel 12 using the treatment instrument 11, for example, basket forceps as shown in FIG. 1, the object 50 cannot be recovered through the channel 12.

Therefore, as shown in FIG. 1, the raising table 28 is laid down and the distal end portion 11a of the treatment instrument 11 is left protruding. It passes through the leading-out groove 42 that is continuous with this and slopes, climbs over the tip wall portion 40 while bending, and wraps around to the front of the tip structure portion 7 . That is, the treatment instrument 11 does not protrude significantly from the maximum outer diameter portion of the distal end component 7 of the endoscope 1.

Since the entire endoscope 1 is pulled out of the body in this state, the treatment tool 11 does not cause pain to the patient or damage the inner wall of the stomach or esophagus. Moreover, the collected object 50 will not be dropped on the way due to strong pressure.

Further, in front of the leading-out groove 42, a wall portion that hides the groove 42, that is, a distal end wall portion 40 is provided, so that when inserting the insertion portion 2 into the body, the groove 42
2 can be prevented from getting caught or caught in the body cavity wall and causing injury.

It should be noted that the present invention is not limited to the above embodiment. Also, instead of using the image guide fiber 13, an imaging unit using a solid-state image sensor may be incorporated in the tip component 7 to electrically capture images.

[Effect of idea]

As explained above, according to the present invention, the distal end portion of the treatment instrument holding the collected object can be retracted to the front of the distal end component without causing the distal end portion to protrude sideways. Therefore, reducing patient pain and
It is also safe to use.

Furthermore, since the distal end side of the guide groove formed in the distal wall of the treatment instrument outlet is hidden by the distal wall, the instrument can be used safely without catching or damaging the body cavity wall during insertion.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which FIG. 1 is a sectional view of the tip of the insertion section, FIG. 2 is a sectional view of the tip of the insertion section,
3 is a front view of the distal end of the insertion section, FIG. 4 is a plan view of the distal end component, FIG. 5 is a perspective view of the distal end component, and FIG. 6 is a perspective view of the endoscope. DESCRIPTION OF SYMBOLS 1...Endoscope, 2...Insertion part, 7...Tip component, 11...Treatment instrument, 12...Channel, 17
... Outlet, 22 ... Exit, 28 ... Elevating platform, 3
0... Operation wire, 31... Insertion hole, 35... Guide tube, 40... Tip wall portion, 41... Guide groove, 42... Leading out groove, 50... Recovered material.

Claims (1)

[Scope of utility model registration request] The insertion section is provided with a channel through which the treatment instrument is inserted, and the tip of this channel is formed with a treatment instrument outlet in which an elevator is housed, and the treatment instrument is led out from the outlet of the treatment instrument outlet. In the mirror, the treatment instrument outlet is formed with its outlet facing laterally toward the distal end component of the insertion section, and on the distal end side of the outlet, there is a guide groove connected to the guide groove in the treatment instrument elevator when the treatment instrument is lowered. What is claimed is: 1. An endoscope comprising: a guide groove; and a distal end wall portion on the distal end side of the guide groove, which is lower than an end surface on which a window of an optical system is provided and which hides the guide groove.