JP3048439B2 - Treatment instrument insertion type endoscope - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a treatment instrument insertion type endoscope which can be used by inserting various treatment instruments into the endoscope.

[0002]

2. Description of the Related Art A CCD (Charge Cou) which is a solid-state image sensor is used.
An electronic endoscope having a pled Device) at its tip or an endoscope for observing only by optical means is well known. In this type of endoscope, not only the state inside the body to be observed is observed but also
Incisions, biopsies, collections, and other procedures are performed using various treatment tools such as forceps. For example, an incision is made in the papilla (inside of the duodenum) with a treatment tool such as a high-frequency knife, and the treatment tool is also used in an endoscopic pancreatobiliary examination (ERCP) performed along with this.

FIG. 5 shows the structure of a tip of a conventional side-view type electronic endoscope.
A forceps port 3 communicating with a treatment instrument insertion channel 2, an observation window, an irradiation window, and the like (not shown) are provided on a side surface, not a front portion, of the distal end portion 1 of the endoscope. Therefore, it is possible to observe and treat a portion existing in a direction perpendicular to the insertion direction of the endoscope. An upright 4 that pivots in the direction of the forceps port 3 is attached to the side surface of the endoscope distal end 1 by a shaft 5 as shown in the figure, and a wire (not shown) is connected to the upright 4. I have. Accordingly, the upright 4 is rotated by a wire operation, and the treatment tool 6 introduced from the forceps port 3 into a predetermined site can be raised to a predetermined position by the rotating upright 4.

In such an endoscope, a roller 7 is provided, for example, on a wall opposed to the upright base 4 of the forceps port 3 so that the treatment instrument 6 can be slightly moved in and out of the forceps port 3. The treatment instrument 6 is disposed at a position where the treatment instrument 6 comes into contact with the side. That is, the treatment tool 6 is bent to about 90 degrees as shown in the figure, and is raised by being pressed against the wall of the forceps port 3 by the stand 4, so that it is relatively difficult to insert and remove the treatment tool 6 in the upright state. It becomes difficult to position the treatment tool 6 at a target affected part or the like. Therefore, the treatment tool 6 is smoothly moved by disposing the roller 7 described above. Such a conventional apparatus is described in Japanese Utility Model Publication No. 50-19339.

[0005]

However, in a conventional endoscope, a body fluid or the like enters the inside through the forceps port 3 and the rotation area of the roller 7, that is, the gap between the shaft portions and the gap between the roller 7 and the forceps port 3. Body fluids and the like adhere to the space between the walls and the like.
There was a problem that hinders rotation. Therefore, if the smooth insertion / removal operation of the treatment tool 6 is hindered by the attached matter such as the body fluid, the provision of the roller 7 is meaningless.

In the above case, after using the endoscope,
Although it is conceivable to wash the roller 7 from the outside, the roller 7
It was difficult to wash the gap between the shaft portions and the portion hidden in the wall of the roller 7 in the above, and it was not possible to satisfactorily remove the deposits such as body fluids.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to remove a deposit in a roller rotation area reliably to maintain a good rotation state of the roller and to smoothly insert and remove the treatment tool. An object of the present invention is to provide a treatment instrument insertion type endoscope capable of ensuring operation.

[0008]

In order to achieve the above object, the present invention introduces a treatment instrument into a distal end portion through a treatment instrument insertion channel, and bends the treatment instrument in a predetermined direction by a standing stand. In the treatment tool insertion type endoscope which performs various treatments, the treatment tool insertion endoscope is disposed near the outlet of the treatment tool insertion channel to facilitate taking in and out of the treatment tool, and is fixed.
A roller consisting of a rotating body rotating shaft and the outer periphery thereof, this
Cleaning water supply means for supplying cleaning water between the fixed shaft of the roller and the rotating body .

[0009]

According to the above construction, the roller rotates around the fixed shaft.
It is configured to rotating body rotates while sliding, examples of the fixed shaft
Washing water to the shaft portion is supplied from the wash water supply path if e.
Then, the washing water flows from the shaft center to between the fixed shaft and the rotating body, or between the rotating body and the wall in the attachment portion of the forceps port to which the rotating body is attached, thereby removing body fluids and the like. Then, the rotating area of the roller is cleaned.

[0010]

FIG. 1 shows the configuration of a treatment instrument insertion type side-view type endoscope according to a first embodiment, and FIG. 1 (a) shows an endoscope with a forceps port on a lower side. FIG. 4B is a side view of the mirror tip, FIG. 4B is a bottom view of FIG. 4A, and FIG. 4C is a cross-sectional view of FIG. As shown in FIG. 1A, the distal end portion 10 is connected to the bending portion 11 in a state where wires 12a and 12b connected to the operation section are attached.
By operating 12b, the tip portion 10 can be bent. Further, a forceps port 14 communicating with a treatment tool insertion channel (forceps channel) 13 disposed in the bending portion 11 is formed in the distal end portion 10, and a treatment inserted through the treatment tool insertion channel 13 is formed. The tool 6 is led out from the forceps port 14 to the outside.

An erecting base 16 is rotatably supported by a shaft 17 in the direction of the distal end near the forceps opening 14, and a wire 18 is attached to the erecting base 16. The table 16 can be rotated to the position of the chain line 100. The stand 16 is formed with an arc groove 16a for receiving the treatment tool 6. On the other hand, the roller 20 is attached so as to be embedded in a position facing the upright base 16 in the forceps port 14, and the treatment tool 6 inserted into the forceps port 14 is moved by the upright table 16 as shown by a chain line. When the treatment instrument 6 is raised, the treatment instrument 6 is held between the groove 16a of the stand 16 and the roller 20 to maintain the standing state. A roller cleaning water supply path 21 for supplying cleaning water to the roller 20 has a curved portion
Formed through.

That is, FIG. 2 shows the structure of the roller 20 and the roller washing water supply path 21. As shown, the roller 20 of the embodiment rotates by sliding on the fixed shaft 22 and the outer periphery thereof. And a rotating body 23 that rotates. Furthermore,
A passage 22a is formed in the fixed shaft 22 so as to penetrate the shaft core and communicate from the shaft core to the side surface.
As shown in (2), a roller washing water supply path (pipe) 21 is connected to the shaft core of the passage 22a of the fixed shaft 22. According to this configuration, the cleaning water supplied from the roller cleaning water supply passage 21 flows to the side portion through the shaft core of the passage 22 a of the fixed shaft 22, and the gap between the fixed shaft 22 and the rotating body 23 is formed. Further, it is supplied to the gap between the fixed shaft 22 and the rotating body 23 and the wall in the roller mounting portion. Therefore, it becomes possible to satisfactorily remove the body fluid and the like existing in the gap, which is the rotation area of the rotating body 23, by supplying the washing water.

In FIG. 1 (a), a CCD 25 is disposed slightly above the middle of the distal end portion 10, and the CCD 25 is provided.
Is optically connected to an observation window 26 shown in FIG. 1B, and an illumination window 27 is provided near the observation window 26. As shown in FIG. 1C, an image guide 28 is connected to the observation window 26, and a light guide 29 is connected to the illumination window 27. Therefore, the object image obtained by irradiating the predetermined light from the illumination window 27 is transmitted through the observation window 26 to the CCD 25.
And finally the image is displayed on the monitor. In the vicinity of the observation window 26, a nozzle 30 for jetting washing water is provided. This nozzle 30 is provided with an A / W supply path 31 for supplying air (Air) and washing water (Water). The observation window 26 can be supplied with air or cleaning water.

FIG. 3 is an overall view of the electronic endoscope. The electronic endoscope includes a distal end portion 10, a bending portion 11, and an insertion portion 3.
3, support part 35 having operation part 34, and cable 3
6 and a connector section 37 for connecting to an external device. A forceps insertion port 38 communicating with the treatment instrument insertion channel 13 is provided at a front end of the support section 35.
And a washing water supply port 40 communicating with the roller washing water supply passage 21. The operation unit 34 includes a camera shutter button 41a, a suction button 41b, an air / water supply button 41c, an up / down angle knob 41d, a left / right angle knob 41e,
An up-down lock lever 41f, a left-right lock lever 41g, and an upright knob 41h for operating the upright base 16 with the wire 18 are provided.

The first embodiment is constructed as described above. In the electronic endoscope, for example, the treatment tool 6 for performing a biopsy while observing an image of the inside of the body observed through the observation window 26 is inserted into the forceps insertion port 38. Through the treatment instrument insertion channel 13 to the forceps port 14. In the forceps port 14, when the treatment tool 6 is ejected from the forceps port 14, the upright table 16 is raised by operating the upright knob 41h, as shown in FIG.
As shown in (a), the treatment tool 6 is erected, and the treatment tool 6 is sandwiched between the stand 16 and the roller 20. In this state, a predetermined biopsy procedure is performed, and the protruding length of the treatment instrument 6 at that time is adjusted by pushing and pulling the treatment instrument 6. The loading and unloading is smoothly performed by the presence of the rollers 20.

Thus, in the embodiment, the roller 20 is washed when the above-mentioned biopsy procedure is completed. That is, when the cleaning water is supplied from the cleaning water supply port 40 to the roller cleaning water supply path 21, the cleaning water flows from the roller cleaning water supply path 21 to the passage 22a of the fixed shaft 22 of the roller 20 shown in FIG. The washing water is a fixed shaft 2 which is a rotation area of the roller 20.
It is supplied to a gap between the rotating body 2 and the rotating body 23 and a gap between the fixed shaft 22 and the rotating body 23 and a wall in the roller mounting portion. Accordingly, the body fluids and the like that have entered the rotating area of the rotating body 23 are washed, and the generation of deposits in the rotating area can be prevented. The cleaning of the roller 20 can be performed during the treatment by the treatment tool 6.

Next, the configuration of the second embodiment will be described with reference to FIG. In the second embodiment, the uprights are provided with rollers. As shown, the uprights 44 are rotatably supported by a shaft 43, and the rollers 45 are attached to the distal ends of the uprights 44. The roller 45 has the same configuration as the roller 20 of the first embodiment (FIG. 2), and is connected to a cleaning water supply path so as to supply cleaning water from a fixed shaft center of the roller 45. Such a roller 45 of the second embodiment may be provided independently, but may be provided together with the roller 20 of the first embodiment. In this case, both rollers 45 are provided from the roller cleaning water supply path 21 shown in FIG. The cleaning water is supplied to the rollers 20 and 45. According to the second embodiment, the treatment tool 6 is sandwiched between the rollers 20 and 45 from both directions, so that the treatment tool 6 can be taken in and out more smoothly.

In the above embodiment, the washing water supply path (21) for the rollers 20, 45 is provided independently, but the A / W supply path 31 already provided for washing the observation window 26 is provided. It is also possible to supply the cleaning water to the rollers 20 and 45 by utilizing the above.

The supply of the cleaning water to the rollers 20 and 45 is performed by supplying the cleaning water from the axis of the fixed shaft 22, but the invention is not limited to this. A path may be connected, and the cleaning water may be supplied from the wall to the roller. Further, the roller itself may be of a type in which the shaft rotates integrally with the rotating body.

[0020]

As described above, according to the present invention,
In an endoscope for carrying out and taking out a treatment tool in a state where the treatment tool is erected by an erecting stand, a roller including a fixed shaft and a rotating body,
Since the washing water supply means for supplying the washing water between the fixed shaft of the rollers and the rotating body is provided , it is possible to remove body fluids and the like that have entered the roller rotating region and prevent the generation of deposits on the roller rotating portions. As a result, a favorable rotation state of the rollers can be maintained, and a smooth insertion and removal operation of the treatment tool can be always ensured.

[Brief description of the drawings]

FIG. 1 is a view showing a configuration of a treatment instrument insertion type endoscope according to a first embodiment of the present invention, where FIG. 1 (a) is a cross-sectional view showing a side surface of a distal end portion, and FIG. 1 (b) is a view (a). Bottom view of the endoscope, Figure (c)
FIG. 4 is a sectional view taken along the line CC of FIG.

FIGS. 2A and 2B are cross-sectional views illustrating a configuration of a roller according to an embodiment. FIG. 2A is a front cross-sectional view, and FIG.

FIG. 3 is a diagram illustrating an overall configuration of the electronic endoscope according to the embodiment.

4A and 4B are diagrams showing a configuration of a second embodiment, wherein FIG. 4A is a front view and FIG. 4B is a side view.

FIG. 5 is a cross-sectional view illustrating a configuration of a distal end portion of a conventional electronic endoscope.

[Explanation of symbols]

 1,10 ... tip, 2,13 ... treatment tool insertion channel, 3,14 ... forceps port, 4,16,44 ... stand, 6 ... treatment tool, 7, 20, 45 ... roller, 21 ... roller cleaning water Supply path, 22: fixed shaft, 22a: passage, 23: rotating body, 31: A / W supply path, 40: cleaning liquid supply port, 41h: standing knob.

Claims (1)

(57) [Claims] A treatment instrument insertion type endoscope for introducing a treatment instrument to a distal end portion through a treatment instrument insertion channel and performing various treatments while bending the treatment instrument in a predetermined direction by an upright stand. is disposed near the outlet of the treatment instrument insertion channel in order to facilitate loading and unloading of the treatment instrument, the fixed shaft and the outside thereof
A treatment tool insertion type endoscope comprising: a roller composed of a rotating body that rotates around the circumference ; and a cleaning water supply unit that supplies cleaning water between a fixed shaft of the roller and the rotating body. .