JP2558845Y2 - 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 configuration of 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.

FIG. 4 shows the structure of a tip of a conventional side-view type electronic endoscope.
A forceps port (part of the treatment instrument insertion channel) 3 communicating with the treatment instrument insertion channel 2 and an observation window (not shown), an irradiation window, and the like are provided on the side of the endoscope distal end 1 rather than on the front. Have been. 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 by a shaft 5 to a side surface of the endoscope distal end 1 as shown in the figure, and a wire 6 that is connected to the operation unit is attached to the stand 4. It is connected. Accordingly, the pulling operation of the wire 6 causes the upright 4 to rotate, and the upright 4
Thereby, the treatment tool 7 drawn out from the forceps port 3 can be raised to a predetermined position as shown by a chain line. Examples of the treatment tool 7 include a biopsy forceps, scissors forceps, a high-frequency knife, a high-frequency snare, a high-frequency hemostat, a cytology brush, an injection needle, and the like. Will be

[0004]

However, in the conventional endoscope, there is a problem that the treatment tool 7 enters the portion of the storage portion of the upright stand 4 where the wire 6 is attached. That is, as shown in the drawing, there is no gap between the wall A of the storage portion of the upright 4 and the upright 4, but the wall B on which the wire 6 is disposed has a gap with the upright 4. A gap 300 is formed between the gaps, and the treatment tool 7 may escape into the gap 300. In particular, since the treatment tool 7 is used by being bent by the standing stand 4 as described above, it often has a bending habit,
This bending habit guides the treatment tool 7 into the gap 300. In an extreme case, the treatment tool 7 gets stuck in the gap 300 and cannot be removed.

On the other hand, in the case of the endoscope, when the treatment tool 7 is raised on the upright 4, the wire 6 is pulled too strongly, and the treatment tool 7 sandwiched between the upright 4 and the wall of the forceps opening 3. The treatment tool 7 may be crushed and hinder the original function of the treatment tool 7.
Therefore, it is necessary to stop the upright 4 at an appropriate position so that the treatment tool 7 is not crushed.

The present invention has been made in view of the above problems, and a first object of the present invention is to stop an upright stand at an appropriate position and prevent escape of a treatment tool into an upright stand storage portion. An object of the present invention is to provide a treatment instrument insertion type endoscope that can be used.

In order to achieve the first object,
In the present invention, a stopper is provided. In this case, it is necessary to make the position of the stopper adjustable, but it is convenient if this adjustment can be easily performed.

Accordingly, a second object of the present invention is to provide a treatment instrument insertion type endoscope which can easily adjust a stopper.

[0009]

According to a first aspect of the present invention, there is provided an endoscope having an upright stand near an outlet of a treatment instrument insertion channel at a distal end portion of the endoscope. In a treatment tool insertion type endoscope that performs various treatments while bending the treatment tool in a predetermined direction by raising the wire with a wire, in the region where the treatment tool insertion channel intersects with the storage portion of the upright table, It is located at the mounting part side and at a position where escape of the treatment tool to the upright table storage part can be prevented,
A stop positioning member for stopping the upright at a predetermined position, the stop position by the head being screwed to a head for locking a locking portion of the upright and a support at the tip. A stopper having an adjusting screw portion for adjusting the distance, and the adjusting screw portion of the stopper is attached to the support in a state where the head of the stopper moves in a direction perpendicular to the endoscope axis. And According to a second aspect of the present invention, the screw end of the adjusting screw portion of the stopper is disposed so as to be exposed to the outside with the cap at the distal end removed, and the adjusting screw portion is operated by operating the screw end. It is characterized in that it can be adjusted. According to a third aspect of the present invention, the adjusting screw portion is provided with mechanical fixing means for fixing the stopper, and the fixing means is disposed so as to be exposed to the outside with the cap at the distal end removed. The stop position of the stopper can be adjusted when the cap is removed.

[0010]

According to the above arrangement, for example, the locking pin provided on the stand comes into contact with the stopper provided on the treatment instrument insertion channel to stop the stand. The stop of the position prevents the treatment instrument from being crushed more than necessary. The stopper serves to guide the treatment tool to the proper outlet, and can prevent the treatment tool from escaping into the upright table housing.

The stopper is provided with an adjusting screw for adjusting the locking position of the head, and the adjusting screw is attached to the support in a direction perpendicular to the endoscope axis.
The head of the stopper can be moved vertically to adjust the stop position of the upright. Since the screw end of the adjusting screw portion is exposed by removing the cap, it is easy to adjust the stopper position without disassembling the endoscope itself.

Further, the adjusting screw portion is prevented from being loosened by using a double nut or a set screw.
The position of the stopper does not change even by frequent erecting operations of the erecting stand, and a firm mounting state is maintained.

[0013]

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. In FIG. 1A, the distal end portion 10 is connected to the bending portion 11 with wires 12a and 12b connected to the operation section attached thereto, and the distal end portion 10 is bent by operating the wires 12a and 12b. can do. A treatment instrument insertion channel (forceps channel) 13 provided in the bending portion 11 is provided in the distal end portion 10.
Is formed, and a forceps port 14 which is a part of the treatment instrument insertion channel is formed. The treatment instrument 7 inserted through the treatment instrument insertion channel 13 is led out from 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 opening 14, and a wire 18 is attached to the upright 16.
Is attached, and by pulling the wire 18, the stand 16 can be turned 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 the forceps port 1 is formed.
When the treatment tool 7 inserted into the tool 4 is raised by the stand 16, the treatment tool 7 is held between the arc-shaped groove 16 a and the inner wall of the forceps port 14 as shown by a dashed line.

Then, on the side surface of the forceps port 14 where the wire 18 is provided, as shown in FIG. 2B, at the portion where the forceps port 14 intersects with the storage portion of the upright stand 16 to be united. A bolt-shaped stopper 20 having a head of a predetermined size is provided at a position to close the resulting gap 300. The bolt-shaped stopper 20 is configured to be screwed into a female screw portion of the support 21 of the distal end portion 10, and the double nuts 22 a and 22 b are screwed into the male screw portion of the stopper 20 to be connected to the distal end portion. The stopper 20 is provided with a bolt-nut type adjusting screw portion. Therefore, the protrusion amount of the stopper 20 can be adjusted by the adjusting screw portion, and the double nut 22a,
The fixed state of the stopper 20 can be strengthened by 22b, and the stopper 20 does not shift even if the erecting base 16 is frequently erected. On the other hand, a locking pin 23 is attached to the side surface of the stand 16, and the lock pin 23 is locked to the stopper 20 when the stand 16 is raised by the wire 18. It is possible to maintain a predetermined distance between the table 16 (arc groove 16a) and the wall of the forceps port 14 facing the same so that the treatment tool 7 is not excessively crushed.

In FIG. 1 (a), a CCD 25 is disposed in the middle of the tip portion 10 and slightly above, and an observation window 26 shown in FIG. 1 (b) is optically connected to the CCD 25. An illumination window 27 is provided near the window 26.
Accordingly, the observation target image obtained by irradiating the predetermined light from the illumination window 27 is captured by the CCD 25 through the observation window 26,
Eventually, an image is displayed on the monitor. Also,
In the vicinity of the observation window 26, a nozzle 3 for injecting cleaning water is provided.
0 is provided so that air or cleaning water can be supplied to the observation window 26 through the nozzle 30.

Further, although not shown, the tip 1
0, a support portion having an operation portion is formed integrally with the bending portion 11 via an insertion portion, and a forceps insertion port communicating with the treatment instrument insertion channel 13 is provided in this support portion,
The operation unit is provided with a camera shutter button, up / down and left / right angle knobs, and an upright knob for operating the upright base 16 with a wire 18.

In the first embodiment, the adjusting screw portion of the stopper 20 is disposed at a position where it can be easily adjusted. That is, as shown in FIG.
0, a cap 32 is detachably attached. With the cap 32 removed, the double nut 22a,
It is configured such that 22b is exposed. This is shown in FIG.
As shown in (c), a portion where the CCD 25 is disposed and a portion where the double nuts 22a and 22b are disposed are separated by a partition plate 33, and the CCD 25 can be achieved by forming a mold 34 in the same manner as in the related art. is there.

The first embodiment is constructed as described above. In the electronic endoscope, the treatment tool 7 for performing various treatments while observing the image of the inside of the body observed through the observation window 26 is inserted through the forceps insertion port. Forceps port 1 through treatment instrument insertion channel 13
4 will be introduced. At this time, the treatment instrument 7 may try to enter the gap 300 [FIG. 1 (b)] due to its bending habit or the like. However, since the entrance to the gap 300 is closed by the stopper 20, the treatment instrument 7 is closed. 7 jumps out of the outlet of the forceps opening 14 without hesitation. In this way, when the treatment tool 7 is pulled out of the forceps port 14 by operating the upright knob of the operation section and pulling the wire 18, the upright stand 16 is raised as shown in FIG. The tool 7 is bent while being sandwiched between the upright 16 and the inner wall of the forceps opening 14. When further pulled, the locking pin 23 is locked to the stopper 20 and the upright 1
6 is stopped, and the treatment tool 7 is maintained in a predetermined treatment function without being crushed.

In the above case, since the stopper 20 is mechanically fixed by the double nuts 22a and 22b in a mechanically strong state, there is no displacement, and the adjusting screw of the stopper 20 is formed by the cap 32. The stopper is exposed by removing it, so that the stopper position can be easily adjusted. When the adjustment is performed again without exposing the stopper 20, it is necessary to disassemble the distal end portion 10 and the curved portion 11, but in the present invention, the adjustment can be easily performed only by removing the cap 32. In addition, although the diameter of the treatment instrument 7 with an endoscope has recently become uniform in size, it is sometimes necessary to use a treatment instrument having a different size. By removing the cap 32, the stop position of the standing table 16 may be adjusted, and there is an advantage that it is possible to easily cope with the treatment tools 7 having different sizes.

FIG. 3 shows the structure of the second embodiment. In the second embodiment, a set screw is used as a mechanical means for preventing a screw from being loosened in an adjusting screw portion. That is, the bolt-shaped stopper 35 is screwed into the support 21, and the set screw 36 is set from the side of the support 21.
Is brought into contact with the male screw portion of the stopper 35. In this case, when the cap 32 is removed, the set screw 36 is removed.
Is exposed, and the set screw 36 can be turned. The second embodiment also has the advantage that the stopper 35 can be firmly fixed by the set screw 36, and the stopper position can be easily adjusted only by removing the cap 32.

[0022]

As described above, according to the first aspect of the invention, in the endoscope in which the erecting stand is operated by the wire, the end of the wire near the outlet of the treatment instrument insertion channel is provided on the end of the endoscope. A stopper for stopping the upright at a predetermined position is provided, so that the treatment tool is not crushed too much,
In addition, it is possible to prevent the treatment tool from escaping to the upright table storage section. Therefore, even if the treatment tool has a bending habit, the treatment tool is smoothly led out to the outlet of the treatment tool insertion channel, and the treatment tool does not get stuck in the gap of the storage section and cannot be removed. In addition, the stopper is provided with an adjusting screw portion for adjusting the position of the head, and the head is screwed to the support so that the head moves in a direction perpendicular to the endoscope axis. There is an advantage that the adjustment of the stop position of the upright can be easily performed.

According to the second aspect of the present invention, when the distal end cap is removed, the screw end of the adjusting screw portion is exposed, so that the position of the stopper can be easily adjusted only by removing the cap. Therefore, the readjustment of the position is simplified, and it is possible to easily cope with a treatment instrument having a different diameter.

According to a third aspect of the present invention, a mechanical fixing means for fixing a stopper to the adjusting screw portion is provided.
The fixing means is exposed to the outside with the tip cap removed, so that the stopper itself can be prevented from being displaced by operating the standing stand, and readjustment of the stop position of the stopper requires the cap to be adjusted. It can be easily removed.

[Brief description of the drawings]

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

FIG. 2 is a perspective view showing a state in which a cap at a distal end portion is removed from the electronic endoscope of the embodiment.

FIG. 3 is a cross-sectional view illustrating a configuration of an endoscope according to a second 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: tip, 2,13 ... treatment instrument insertion channel, 3,14 ... forceps port, 4,16 ... stand, 7 ... treatment instrument, 20, 35 ... stopper, 21 ... support, 22a, 22b ... Double nut, 23 ... Locking pin, 32 ... Cap, 36 ... Set screw.

Claims (3)

(57) [Scope of request for utility model registration] An upright stand is provided near the exit of a treatment instrument insertion channel at the distal end of an endoscope, and various treatments are performed while bending the treatment instrument in a predetermined direction by operating the upright stand with a wire. In the treatment instrument insertion type endoscope, the treatment instrument insertion channel is located at a region where the treatment instrument insertion channel intersects with the storage section of the upright table, at the side where the wire is attached , and the treatment instrument is upright.
It is located at a position where escape to the table storage section can be prevented,
A stop positioning member for stopping the stand at a predetermined position
A head for locking the locking portion of the stand and the tip
Stop position by the head while screwed to the support at the end
A stopper having an adjustment screw part for adjusting the position is provided , and the head of the stopper moves in a direction perpendicular to the endoscope axis.
Support the adjustment screw part of the stopper.
A treatment instrument insertion type endoscope which is attached to a body . 2. A screw end of an adjusting screw portion of the stopper ,
It is arranged so that it is exposed to the outside with the cap at the tip part removed, and the adjustment screw part is operated by operating the screw end.
The treatment instrument insertion type endoscope according to claim 1, wherein the endoscope can be adjusted . 3. The stopper is fixed to the adjusting screw portion.
Mechanical fixing means for fixing the
So that it is exposed to the outside with the cap on the part removed
Arrange and stop the stopper when removing the cap.
The position can be adjusted .
Alternatively, the treatment instrument insertion type endoscope according to claim 2.