JP3048440B2 - 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, and more particularly to a side view type endoscope having an erecting stand for erecting a treatment instrument led to a distal end.

[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. 4 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. A stand 4 that rotates in the direction of the forceps port 3 is attached to a side surface of the endoscope distal end 1 by a shaft 5 as shown in the figure, and the stand 4 has a wire 6 connected to the operation unit. It is connected. Accordingly, the pulling operation of the wire 6 causes the upright table 4 to rotate, and the rotating upright table 4 causes the treatment tool 7 (dashed line) introduced from the forceps port 3 into a predetermined site to a predetermined position. The treatment tool 7 in the upright state can perform various treatments.

[0004]

However, in the conventional endoscope, the upright stand 4 rotates about the shaft 5 as described above. There is a problem that the standing stand 4 itself may fluctuate, and the positioned treatment tool 7 cannot be used in a stable state. That is, the upright position of the upright stand 4 is determined by the wall of the mounting portion of the shaft 5 and the wall surfaces A and B of the distal end portion 1 shown in FIG. At this time, the treatment tool 7 is fixed by abutting on the distal end portion of the stand 4, so that the stand 4 swings around the axis 5. Some restrictions. However, since the wall B is retracted as shown in the drawing due to the arrangement of the wires 6 and the like, the upright 4 swings in the direction of the wall B.

[0005] In general, in an endoscope using the treatment tool 7, many treatments are performed on fine parts. For example, even in the above-mentioned endoscopic papilla incision, the standing state of the standing table 4 is firmly stable, and An endoscope capable of accurately positioning the treatment tool 7 is required.

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 provide a treatment tool insertion type endoscope which can prevent a wobble of a standing stand and can stably position a treatment tool. Is to do.

[0007]

According to a first aspect of the present invention, an upright table is rotatably supported near an outlet of a treatment instrument insertion channel at a distal end portion of an endoscope. ,
In a treatment tool insertion type endoscope which performs various treatments while bending a treatment tool guided to a distal end portion in a predetermined direction by the standing stand, a portion of the standing stand opposite to a treatment tool contact portion.
And an engagement groove formed therein, and is engaged in the engagement groove to regulate an upright position of the upright stand, and to sway the upright stand supported by the shaft.
A position restricting plate for preventing the mounting is provided on the mounting portion side of the stand . The invention according to a second aspect is characterized in that a plurality of slits (cut grooves) having a predetermined width are formed in the position regulating plate.

[0008]

According to the above construction, the upright table driven by the wire rises along the position regulating plate, and the upright table causes the treatment tool led out of the treatment tool insertion channel to rise while bending. At this time, since the position regulating plate is engaged with the engagement groove of the stand, the stand does not swing, and the treatment tool is maintained at a stable stand position.

When a slit is provided in the position restricting plate, the body fluid attached to the position restricting plate or the engaging groove is raised when the upright stand rises while sliding the engaging groove on the side surface of the position restricting plate. Can be escaped into the slit, and both slides can be smoothly performed.

[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. A forceps port 14 is formed in the distal end portion 10 and communicates with a treatment tool insertion channel (forceps channel) 13 provided in the curved portion 11, and a treatment inserted through the treatment tool insertion channel 13. The tool 7 is led out of the forceps port 14 to the outside.

As shown in the drawings, an upright 16 is rotatably supported by a shaft pin 17 in the direction of the distal end near the forceps port 14, and a wire 18 is attached to the upright 16.
Is mounted, and by operating the wire 18, the standing stand 16 can be rotated to the position of the chain line 100. An arc groove 16a for receiving the treatment tool 7 is formed in the upright base 16, and when the treatment tool 7 inserted into the forceps port 14 is raised by the upright base 16, an arc is formed as shown by a chain line. The treatment tool 7 is kept upright by being sandwiched between the groove 16a and the inner wall of the forceps port 14.

A rectangular position control plate 20 made of, for example, stainless steel is attached to the vicinity of the bearing of the stand 16 slightly below the middle of the tip 10 from the middle step, and FIG.
As shown in (c), the upright stand 16 is formed with an engaging groove 16b which engages with both sides of the rectangular position regulating plate 20 so as to slide. According to this configuration, the inner surface of the engagement groove 16b of the stand 16 comes into contact with both side surfaces of the position regulating plate 20, so that the position of the stand 16 is regulated.
Even when 6 is completely raised, the engagement groove 16b does not come off from the position regulating plate 20. Therefore, wire 1
1, the standing table 16 is raised, and even when the treatment tool 7 is raised as shown in FIG. 1A, it is possible to prevent the lateral movement of the standing table 16 and stabilize the standing position of the treatment tool 7. it can.

In FIG. 1A, a CCD 25 is provided behind the middle position regulating plate 20 of the distal end portion 10, and an observation window 26 shown in FIG. The illumination window 27 is provided near the observation window 26. 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 cleaning water is provided, and the nozzle 30 is provided with an A / W supply path (not shown) for supplying air and cleaning water. The 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 portion 35. 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 operated by the user is provided.

The first embodiment is constructed as described above. In the electronic endoscope, for example, a procedure for endoscopic pancreatobiliary imaging is performed while observing the image of the inside of the body observed through the observation window 26. The treatment tool 7 to be performed is introduced from the forceps insertion port 38 into the forceps port 14 via the treatment tool insertion channel 13. In the forceps port 14, the treatment tool 7 is
When the user pulls the wire 18 by operating the upright knob 41h at the time of jumping out of the position 4, as shown in FIG. 1A, the upright base 16 rises in a state where its position is regulated by the position regulating plate 20. The treatment tool 7 is sandwiched between the upright 16 and the inner wall of the forceps port 14. In this state, in the case of endoscopic pancreatobiliary imaging, the papilla is incised by the treatment tool 7, but the treatment tool 7 does not swing due to the position regulation of the position regulation plate 20, and is precise. The incision procedure can be performed favorably.

FIG. 2 shows the structure of the position regulating plate in the second embodiment. As shown in the drawing, the second embodiment has slits (notches) of a predetermined width formed on both side surfaces of the position regulating plate 42. groove)
43 are formed. That is, the engagement grooves 1 between the side and top surfaces of the position regulating plates 20 and 42 and the upright 16
It is conceivable that a bodily fluid or the like intrudes between the inner surface of the base 6b and the bodily fluid or the like, which hinders the smooth standing operation of the standing stand 16.
Therefore, if a plurality of slits 43 having a predetermined width are formed as shown in the position regulating plate 42 and body fluids and the like are allowed to escape into the slits 43, the standing stand 16 that rises up while contacting the position regulating plate 42 is formed. A smooth standing operation can be ensured.

In the above embodiment, the chain line 100 in FIG.
As shown in FIG. 5, since the area of the engagement groove 16b that hangs on the position regulating plate 20 when the standing table 16 stands is reduced, the contact area between the engagement groove 16b and the position regulating plate 20 in the upright state is increased. The position regulating plate 20 near the shaft pin 17
May be deformed and expanded, and the groove shape of the engagement groove 16b may be expanded in accordance with the expanded shape.

[0018]

As described above, according to the first aspect of the present invention, there is provided an endoscope in which a treatment tool is bent in a predetermined direction by an upright base rotatably supported . An engaging groove is formed in the upright stand, and a position regulating plate that engages in the engaging groove and regulates the upright position of the upright stand is attached to the upright stand mounting portion.
Since there is provided a wander of the treatment tool when working bending treatment instrument by riser can be eliminated, it is possible to use the treatment instrument in a stable position state. Therefore,
There is an advantage that a precise endoscopic procedure can be performed well.

According to the second aspect of the present invention, since a plurality of slits having a predetermined width are formed in the position regulating plate, the erecting operation of the erecting base can be performed smoothly even if body fluids or the like enter. .

[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 cross-sectional view taken along line CC of FIG.

FIG. 2 is a perspective view illustrating a configuration of a position regulating plate according to a second embodiment.

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 distal end portion of a conventional electronic endoscope, in which FIG. 4A is a side cross-sectional view, and FIG.
It is a bottom view of the endoscope.

[Explanation of symbols]

 1,10: distal end portion, 2,13 ... treatment instrument insertion channel, 3,14 ... forceps port, 4,16 ... upright stand, 7 ... treatment instrument, 16b ... engaging groove, 17 ... shaft pin, 20, 42 ... Position control plate, 41h ... Standing knob, 43 ... Slit.

Claims (2)

(57) [Claims] An upright table is rotatably supported near an exit of a treatment tool insertion channel at a distal end portion of an endoscope, and the treatment tool guided to the distal end portion is bent by the upright table in a predetermined direction. In the treatment instrument insertion type endoscope which performs various treatments, an engagement groove is formed in a portion of the upright stand opposite to the treatment instrument contact portion, and the upright stand is engaged with the engagement groove. The standing position is regulated and the shaft
The position restricting plate to prevent the fluctuation of riser which is supported
A treatment instrument insertion type endoscope provided on a mounting portion side of a stand . 2. The treatment tool insertion endoscope according to claim 1, wherein a plurality of slits having a predetermined width are formed in the position regulating plate.