JPH10151108A - Tip of side-viewing type endoscope - Google Patents

Abstract

(57) [Problem] To provide a side-view mold which can surely wash the surface of an observation window with air and water and can be manufactured at low cost without bending an air / water supply nozzle. Providing the tip of the endoscope. An air supply / water supply system is provided in which a distal end portion of an air supply conduit and a distal end portion of a water supply conduit have an end opening provided toward a surface of an observation window provided on a side surface of a distal end body. At the distal end of the side-view type endoscope, which is arranged on the same plane as the nozzle 3 and is connected to the rear end of the air / water nozzle 3 in a direction not parallel to the axial direction of the air / water nozzle 3. ,
The width of the portion of the air / water supply nozzle 3 near the front end opening 3a was smaller than the width of the rear end 3b side portion.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a distal end portion of a side view type endoscope in which an air / water supply nozzle is arranged toward a surface of an observation window.

[0002]

2. Description of the Related Art FIG. 5 and FIG.
FIG. 5 shows a distal end portion of a conventional side-viewing type endoscope described in Japanese Patent Application Laid-Open No. H11-15095, and FIG. FIG. 6 is a cross-sectional side view.

[0003] Reference numeral 3 denotes an air / water supply nozzle for selectively jetting air and water to wash the surface of the observation window 2. The axis is directed substantially toward the center of the observation window 2, and the tip opening 3 a is observed. It faces the surface of the window 2 from behind.

The distal end of the air supply pipe 4 and the distal end of the water supply pipe 5 communicating with the rear end 3b of the air / water supply nozzle 3 are arranged on the same plane as the air / water supply nozzle 3, and
Is fixed to

[0005] Then, as shown in FIG.
The front half of the air / water supply nozzle 3 is bent slightly obliquely from above with respect to the observation window 2 so that air and water can be blown on the surface of the observation window 2 and crushed thinly in the height direction. It is formed in the shape shown, and as shown in FIG.
The width direction extends accordingly.

[0006]

The air supply pipe 4 and the water supply pipe 5
Are bundled together in a single pipe substantially on the front side of the air / water supply nozzle 3 so that the direction of the pipe axis and the air / water supply nozzle 3
Can be piped so as to match the direction of the axis.

[0007] However, if such a single piping is used, there arises a problem that water remaining in the pipe comes out at the time of air supply, so that as shown in FIG. And the water supply pipe 5 are preferably connected directly to the air / water supply nozzles 3 respectively.

However, if such piping is used, the directions of the air supply pipes 4 and the water supply pipes 5 cannot be aligned with the axis of the air supply / water supply nozzle 3, so that the air and water ejection directions are changed. Unlike the direction of the pneumatic water nozzle 3, there are many cases where the oblique direction is oblique as shown in FIG. In addition, since the front half of the conventional air / water nozzle 3 needs delicate bending, a high manufacturing cost is required for the air / water nozzle 3.

Therefore, the present invention provides a side view type endoscope which can surely clean the surface of the observation window with air and water and can manufacture the air supply / water supply nozzle at low cost without bending. It is intended to provide a mirror tip.

[0010]

In order to achieve the above object, a distal end of a side-viewing type endoscope according to the present invention comprises a distal end of an air supply conduit and a distal end of a water supply conduit. The air supply and water supply nozzle is disposed on the same plane as the air supply and water supply nozzle having the distal end opening facing the surface of the observation window provided on the side surface of the main body, and is not parallel to the axial direction of the air supply and water supply nozzle. At the distal end of the side-viewing type endoscope that is connected to the rear end of the nozzle, the lateral width of the portion near the distal opening of the air / water nozzle is formed to be smaller than the lateral width of the rear end portion. .

[0011] The surface of the observation window may be located at a height between the upper end and the lower end of the tip opening of the air / water supply nozzle.

Further, the air / water supply nozzle may be formed by an independent pipe-shaped member, and at least a distal end portion of the air / water supply nozzle is provided with a cap-shaped member provided so as to cover the distal end body. It may be formed on a member.

Further, the distal end of the side-viewing type endoscope according to the present invention is such that the distal end of the air supply conduit and the distal end of the water supply conduit are provided on the surface of an observation window provided on the side surface of the distal end main body. A side view is disposed on the same plane as the air / water supply nozzle having the front end opening disposed therein, and is connected to the rear end of the air / water supply nozzle in a direction not parallel to the axial direction of the air / water supply nozzle. At the distal end of the type endoscope, when viewed from a direction perpendicular to the plane, the width of the portion of the air / water supply nozzle near the outlet is formed to be smaller than the width of the portion near the entrance. And

When viewed from a direction perpendicular to the plane, the air / water nozzle may be arranged toward the center of the surface of the observation window. Further, when viewed from a direction perpendicular to the center axis of the distal end body and included in the plane, the central axis of the air / water supply nozzle is parallel to the central axis of the distal end body, and the air / water supply The surface of the observation window may be located on the extension of the inner wall of the nozzle opening.

The air / water supply nozzle may have an oval cross section.

[0016]

Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a plan view of a part of a distal end body 1 provided at the distal end of an insertion portion of an endoscope, viewed from the front side of an observation window 2, and FIG. 2 is a side sectional view thereof.

Observation window 2 arranged on the side of tip body 1
An objective optical system 21 for forming an observation image introduced from the observation window 2 on the end face of the image guide fiber bundle 23 is arranged inside the image guide fiber bundle 23. Reference numeral 22 denotes a right-angle roof prism for bending the observation optical axis at a right angle.

The emission end face of the light guide fiber bundle 61 is arranged inside the illumination window 6 arranged side by side with the observation window 2. Reference numeral 62 denotes a bottom cover that covers a groove formed in the distal end main body 1 to accommodate the light guide fiber bundle 61.

A tip cap 11 made of plastic or rubber, which covers a surface other than the surface on which the observation window 2 and the illumination window 6 are arranged, is detachably attached to the tip body 1 with fixing screws 12. Have been. 7 is a forceps raising stand.

Reference numeral 3 denotes an air / water supply nozzle for selectively jetting air and water to wash the surface of the observation window 2, and has a tip opening 3 a whose axis is substantially directed toward the center of the surface of the observation window 2.
Faces the surface of the observation window 2 from behind.

The front end of the air supply pipe 4 and the front end of the water supply pipe 5 communicating with the rear end 3b of the air supply / water supply nozzle 3 are arranged on the same plane as the air supply / water supply nozzle 3, and The axis of the water supply pipe 5 and the pipe axis of the water supply pipe 5 are respectively at an angle of about 15 ° from the left and right with respect to the axis of the air supply / water supply nozzle 3.
It is arranged toward.

An air supply hole 4a and a water supply hole 5a connected to the air supply pipe 4 and the water supply pipe 5 are connected to the rear end 3 of the air supply / water supply nozzle 3.
Air supply / water supply nozzle 3 with part overlapping in part b
Is in communication with

The air / water nozzle 3 is a pipe-shaped member fixed to the distal end main body 1, and is viewed from a direction perpendicular to a plane where the air / water pipe 4, the water / water pipe 5 and the air / water nozzle 3 are arranged. As shown in FIG. 1, the front half is reduced in width (for example, a fixed width of about half of the width of the rear half) and arranged toward the center of the surface of the observation window 2. ing.

As a result, the air supply pipe 4 is provided in the air supply / water supply nozzle 3.
And the water sent from the water supply pipe 5 do not blow out from the air supply / water supply nozzle 3 in the direction of the extension of the air supply pipe 4 and the tube axis of the water supply pipe 5, but the air supply / water supply nozzle The ejection direction is regulated by the front narrow portion 3, and the ejection is directed toward the center of the surface of the observation window 2.

The cross-sectional shape of the air / water supply nozzle 3 is an oval (oval) that is long in a direction parallel to the surface of the observation window 2 at both the wide portion and the narrow portion on the front side. When the air / water supply nozzle 3 is viewed from a direction included in a plane in which the air / water supply pipe 4, the water supply pipe 5, and the air / water supply nozzle 3 are disposed, as shown in FIG. The half is formed into a shape which is evenly crushed from both upper and lower sides to a narrow width of about half of the rear half.

When viewed from a direction included in the plane on which the air supply pipe 4, the water supply pipe 5, and the air supply / water supply nozzle 3 are arranged, the air supply / water supply nozzle 3 is located at a position where the axis is parallel to the surface of the observation window 2. It is arranged so that the surface of the observation window 2 is located at a height between the upper end and the lower end of the tip opening 3 a of the air / water supply nozzle 3.

As a result, the tip opening 3 of the air / water supply nozzle 3
The air and water jetted from a flow along the surface of the observation window 2 and pass through the vicinity of the center of the observation window 2 without floating or deviating from the surface of the observation window 2, thereby ensuring the surface of the observation window 2. Can be washed. Further, the air / water supply nozzle 3 as described above does not require bending at the time of manufacture, and can be manufactured at low cost.

FIGS. 3 and 4 are a plan view and a side sectional view, respectively, showing a part of the second embodiment of the present invention in a cut-away manner. 11, and a rear half portion is formed by a hollow portion formed in the distal end body 1.

In the second embodiment, similarly to the first embodiment, the axis of the water supply nozzle 3 is directed substantially to the center of the surface of the observation window 2 as shown in FIG.
Also, as shown in FIG. 4, the front half of the air / water nozzle 3 is narrower than the rear half, and has a height between the upper end and the lower end of the front end opening 3a of the air / water nozzle 3. The surface of the observation window 2 is arranged.

With such a configuration, no component is required to configure only the air / water supply nozzle 3, so that
Manufacturing costs can be further reduced.

[0031]

According to the present invention, the width of the front end opening portion of the air / water supply nozzle is formed narrower than the width of the rear end side portion, so that the air and water ejection directions are narrower at the front end of the air / water supply nozzle. Since the air and water can be ejected toward the center of the surface of the observation window by being regulated by the width portion, the surface of the observation window can be reliably cleaned.

In addition, by arranging the surface of the observation window at a height between the upper end and the lower end of the front end opening of the air / water supply nozzle, air and water can be observed without bending the air / water supply nozzle. The gas can be reliably flowed along the surface of the window, and the air / water nozzle can be manufactured at low cost.

[Brief description of the drawings]

FIG. 1 is a plan view showing a distal end portion of a first embodiment of a side-viewing type endoscope according to the present invention, in which a part of the first embodiment is cut away.

FIG. 2 is a side sectional view of a first embodiment of the distal end portion of the side-viewing type endoscope according to the present invention.

FIG. 3 is a plan view showing a distal end portion of a side view type endoscope according to a second embodiment of the present invention, in which a part of the distal end portion is cut away.

FIG. 4 is a side sectional view of a distal end portion of a side view endoscope according to a second embodiment of the present invention.

FIG. 5 is a plan view showing a part of a distal end of a conventional side-viewing type endoscope cut away.

FIG. 6 is a side sectional view of a distal end portion of a conventional side-viewing type endoscope.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Tip main body 2 Observation window 3 Air supply / water supply nozzle 3a Tip opening 3b Rear end 4 Air supply pipe 5 Water supply pipe

Claims (8)

[Claims] 1. A front end portion of an air supply line and a front end portion of a water supply line are flush with an air supply / water supply nozzle having a front end opening facing a surface of an observation window provided on a side surface of a front end main body. The distal end of the side-view type endoscope that is disposed on the upper end and is connected to the rear end of the air / water nozzle in a direction that is not parallel to the axial direction of the air / water nozzle. A distal end portion of a side-viewing type endoscope, wherein a lateral width of a portion near a distal end opening is formed smaller than a lateral width of a rear end side portion. 2. The distal end portion of the side-viewing type endoscope according to claim 1, wherein a surface of the observation window is located at a height between an upper end and a lower end of a distal end opening of the air / water supply nozzle. 3. The end of a side-viewing type endoscope according to claim 1, wherein the air / water supply nozzle is formed by an independent pipe-shaped member. 4. The endoscope according to claim 1, wherein at least a tip portion of the air / water supply nozzle is formed on a cap-shaped member provided so as to cover the tip portion main body. Tip. 5. A front end portion of an air supply line and a front end portion of a water supply line are flush with an air supply / water supply nozzle having a front end opening facing a surface of an observation window provided on a side surface of a front end main body. At the tip of the side-viewing type endoscope, which is disposed above and is connected to the rear end of the air / water supply nozzle in a direction not parallel to the axial direction of the air / water supply nozzle, a direction orthogonal to the plane A front end portion of the side-viewing type endoscope, wherein a width of a portion near an outlet of the air / water supply nozzle is formed smaller than a width of a portion near an inlet when viewed from above. 6. When viewed from a direction perpendicular to the plane,
The distal end portion of the side-view type endoscope according to claim 5, wherein the air / water supply nozzle is disposed toward a center of a surface of the observation window. 7. A center axis of the air / water nozzle is parallel to a center axis of the tip body when viewed from a direction perpendicular to a center axis of the tip body and included in the plane. 7. The distal end of a side-viewing type endoscope according to claim 5, wherein the surface of the observation window is located between the extension of the inner wall of the distal end opening of the air / water supply nozzle. 8. The end portion of a side-viewing type endoscope according to claim 5, wherein the cross-sectional shape of the air / water supply nozzle is oval.