JPH07313441A - Tip of side-viewing endoscope - Google Patents

Abstract

(57) [Abstract] [Purpose] After using the endoscope, the tip case can be removed from the tip body to clean the inside of the nozzle easily and reliably, and the tip case can be easily attached to the tip body. To provide a tip of a side-viewing endoscope capable of performing. An observation window 4 is provided on a side surface of the tip body 1, and a tip case 30 covering the outer surface of the tip body 1 except at least the observation window 4 is attached to and detached from the tip body 1. At the distal end portion of a side-viewing endoscope that is freely provided, the distal end case 30 includes a case body 301 made of an elastic material, and the case body 301 so as to suppress the deformation of the case body 301. The observation window 4 is formed by the deformation suppressing member 302 provided integrally and communicates with the fluid passages 25 and 26 formed in the tip end main body 1.
A communication passage 36 and a nozzle 37 for sending the fluid toward the surface of the above are formed in the tip case 30.

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-viewing endoscope having an observation window provided on a side surface of a distal end portion main body.

[0002]

2. Description of the Related Art FIG. 6 shows a tip portion of a conventional side-view endoscope, and an observation window 92 and an illumination window 93 are provided on a side surface of a tip portion main body 91. A plastic tip case 94 is detachably attached so as to cover the outer surface of the tip body 91 except for the observation window 92 portion and the illumination window 93 portion.

A nozzle 95 for selectively ejecting air and water onto the surface of the observation window 92 to wash dirt is fixed to the tip body 91 with its tip facing the surface of the observation window 92. .

[0004]

However, when the nozzle 95 is fixed to the tip end main body 91 as described above, it is difficult to clean the inside of the nozzle and the air / water supply passage 96 communicating with the nozzle, so that the nozzle 95 is difficult to clean. In some cases, it may be difficult to recover when the clogs are clogged, and it is often the case that the air supply / water supply passage 96 cannot be sufficiently cleaned to prevent infection between patients.

In the case of a front-view endoscope, various nozzles have been devised in order to deal with such a problem. However, in the case of a side-viewing type endoscope, as shown in FIG. 6, since the nozzle 95 is located on the side surface of the distal end portion main body 91, a space for making the nozzle 95 detachable is taken. Is difficult.

Further, unlike the front-view type, since the nozzle 95 does not have a structure in which only the nozzle 95 projects from the tip end main body 91, the nozzle 95 is less likely to be damaged, and it is necessary to repair the nozzle 95 as in the front-view type. Does not happen. Therefore, the side-view type endoscope has left the above-mentioned problems as they are.

Therefore, if a nozzle is formed in the tip case 94, the tip case 94 is removed from the tip body 91 after the endoscope is used, and the inside of the nozzle of the tip case 94 side and the air / water supply of the tip body 91 side are supplied. The inside of the passage 96 can be easily cleaned.

However, the plastic tip case 94
Even if a nozzle is simply formed in the nozzle, leakage will occur at the communication portion between the air / water supply passage 96 on the tip body 91 side and the nozzle on the tip case 94 side.

Therefore, if the tip case 94 is made of an elastic material such as rubber so that the tip case 94 firmly adheres to the tip portion main body 91, such leakage can be eliminated. .

However, if the tip case 94 is elastic, the tip case 94 will be deformed when it is attached to the tip body 91.
It will take a lot of time to install correctly.

Therefore, according to the present invention, the inside of the nozzle can be easily and surely cleaned by removing the tip case from the tip body after using the endoscope, and the tip case can be easily attached to the tip body. An object is to provide a distal end portion of a side-viewing endoscope that can be performed.

[0012]

In order to achieve the above object, the distal end portion of the side-view endoscope of the present invention is provided with an observation window on the side surface of the distal end portion main body, and at least the observation window portion is provided. Except for the tip portion of the side-viewing endoscope in which the tip case that covers the outer surface of the tip body is detachably attached to the tip body, the tip case is made of an elastic material. And a deformation suppressing member integrally provided with the case body so as to suppress the deformation of the case body, and the observation window communicates with a fluid passage formed in the tip body. The tip case is characterized in that a communication passage for sending fluid toward the surface of the nozzle and a nozzle are formed.

[0013]

Embodiments will be described with reference to the drawings. 1, 2 and 3 are a side sectional view, a plan view and a III-III sectional view of an embodiment of the present invention.

In the figure, reference numeral 1 denotes a metal tip body, which is connected to a tip of a bending portion 2 formed at the tip of a flexible endoscope insertion portion. Reference numeral 3 is a flexible rubber tube that covers the curved portion 2.

The tip body 1 is, as shown in FIG.
One side surface of the round rod-shaped material is formed by partially scraping it flat, and on that surface, as shown in FIGS. 1 and 2, an observation window 4, an illumination window 5, and a treatment tool projecting port 6 are formed. Is provided.

The tip body 1 is airtightly covered by a tip case 30 excluding the observation window 4, the illumination window 5, and the treatment tool projecting opening 6 so that the other portions are not exposed. The distal end case 30 is formed in a cap shape in which the front end side is closed and the rear end side is opened, and the portion where the observation window 4, the illumination window 5, and the treatment tool projecting port 6 are located is also shown in FIG. An opening 31 is formed in the.

The tip case 30 comprises a case body 301 made of an elastic material such as fluororubber, and the like.
It is formed by a case frame 302 arranged on the inner surface side of the case body 301 so as to suppress deformation of the case body 301.

As shown in FIG. 1, the tip case 30 is mainly formed by the case body 301, and the case body 301 is formed only in the portion in contact with the circumferential surface of the tip body 1.
The case frame 302 is disposed on the inner surface side of the.

As shown in FIG. 5, the case frame 302 is formed on the ring only in the vicinity of the rear end, and the other part is open on the side where the observation window 4 and the like are located (upper side in the figure). It is formed in a C shape.

The case frame 302 is not elastic like rubber, but is made of metal or plastic that is elastically deformed to some extent, and the case body 301 is lined or adhered to the outer surface of the case frame 302 so that they are not in contact with each other. It is constructed integrally.

At the rear end portion of the tip case 30, a small-diameter portion 3 having a small inner diameter which engages with the circumferential groove 7 formed in the tip body 1 when attached to the tip body 1 to prevent the tip from coming off.
21, 322 are the case body 301 and the case frame 3
No. 02 is continuously formed.

The vicinity of the ring-shaped rear end of the case frame 302 does not spread at all as it is, and the front end case 3
Since 0 cannot be attached to the tip portion main body 1, a pair of slits 303 ... Opening rearward are formed on both left and right sides of the case frame 302.

As a result, the tip case 30 is attached to the tip body 1.
When attaching to the tip case 30, attach the tip case 30 to the tip body 1
The cap can be put on while pushing it against.

At this time, the case frame 302 suppresses the excessive deformation of the case body 301, and the tip case 30 only undergoes the appropriate deformation necessary for attaching to the tip body 1. It can be easily attached to the 1 in the correct state.

With the tip case 30 attached to the tip body 1, the small diameter portion 32 at the rear end of the tip case 30 is provided.
1, 322 are engaged with the circumferential groove 7 of the tip body 1 to prevent them from coming off, and the tip case 30 is fixed to the tip body 1 by the screw 8 on the tip side. Reference numeral 33 denotes a counterbore hole formed at the tip of the tip case 30 for inserting the screw 8.

From the state in which the tip case 30 is attached to the tip body 1, loosen the screw 8 and slide the tip case 30 in the direction opposite to the mounting direction while spreading the rear end side of the tip case 30 to open the tip case 30. It can be removed from the tip body 1.

A treatment instrument raising piece 9 which is oscillated by remote control is accommodated inside the treatment instrument projecting port 6, and the distal end of the treatment instrument insertion channel 11 shown in FIG. Has been done. Reference numeral 12 shown in FIG. 3 is an operation wire for swinging the treatment instrument raising piece 9.

As shown in FIG. 1, a light distribution lens 13 composed of a concave lens for spreading the illumination light is joined to the illumination window 5 portion, and the illumination light guide fiber bundle 14 is located immediately inside thereof. The ejection end is arranged.

A cover lens 15 of the observation optical system is joined to the observation window 4 and a prism 16 for bending the observation optical axis at a right angle is arranged immediately inside the cover lens 15.
Objective lenses 18 are disposed in the lens frame 17 behind the lens 6.

An image receiving surface of a solid-state image pickup device 19, which is, for example, a charge coupled device (CCD), is arranged at an image forming position of an object by the objective lens 18 ...
Extends backwards from there.

Immediately behind the rear end of the cover lens 15, as shown in FIGS. 1, 2 and 3, a groove 22 is formed with a width close to the entire width of the flat surface of the front end main body 1. ,
A fitting piece 35 that is airtightly fitted in the groove 22 is provided on the case body 301 so as to project downward. The fitting piece 35 also has a function of stopping rotation of the tip case 30 with respect to the tip body 1 by being fitted in the groove 22.

In the vertical wall at the rear end of the concave groove 22 of the tip end main body 1, the tips of the air supply passage 25 and the water supply passage 26 are open,
An air supply pipe 23 and a water supply pipe 24 are connected to the air supply passage 25 and the water supply passage 26 from the rear side.

Also, the fitting piece 35 of the case body 301
A communication groove 36 is formed in a horizontally elongated shape in the latter half of the above, and both the air supply passage 25 and the water supply passage 26 are open to the communication groove 36.

A nozzle 37, which directly communicates with the communication groove 36, is formed in the front wall portion of the fitting piece 35 of the case body 301 toward the surface of the cover lens 15. Therefore, the air or water sent through the air supply pipe 23 or the water supply pipe 24 is jetted from the communication groove 36 toward the surface of the cover lens 15 via the nozzle 37.

The air and water passages from the communication groove 36 to the outlet of the nozzle 37 are hermetically sealed from the tip end main body 1 by the elastic case main body 301, so that air leakage and No water leakage will occur.

At the tip of the side-viewing endoscope thus formed, the tip case 30 is formed after the end of the endoscopic examination.
Can be removed from the tip body 1. Then, for example, a cleaning brush is directly inserted into each opening of the air supply passage 25 and the water supply passage 26 exposed by removing the tip case 30, and the air supply passage 25, the air supply pipe 23, and the water supply pipe 24 from inside the water supply passage 26. The inside can be brushed and cleaned.
Further, the nozzle 37 formed on the side of the removed tip case 30 can be sufficiently cleaned from both front and back sides.

[0037]

According to the present invention, the tip case detachably provided to the tip body is formed of the case body made of an elastic material and the deformation suppressing member for suppressing the deformation of the case body. Therefore, when attaching the tip case to the tip body, the deformation suppressing member suppresses excessive deformation of the case body, and the tip case only deforms to the extent necessary for attachment to the tip body. The tip case can be easily attached to the tip body in a correct state.

Since the nozzle for sending out the fluid toward the surface of the observation window is formed on the tip case side, the tip case is removed from the tip body after the use of the endoscope, and the inside of the nozzle on the tip case side and the tip section are removed. The inside of the fluid passage on the main body side can be sufficiently and extremely easily cleaned.

[Brief description of drawings]

FIG. 1 is a side sectional view of an embodiment.

FIG. 2 is a plan view of the embodiment.

FIG. 3 is a front (III-III) sectional view of the embodiment.

FIG. 4 is a perspective view of a tip case of the embodiment.

FIG. 5 is a perspective view of a case body of the tip case of the embodiment.

FIG. 6 is a side sectional view of a conventional example.

[Explanation of symbols]

 1 tip part main body 4 observation window 25 air supply passage 26 water supply passage 30 tip case 36 communication groove 37 nozzle 301 case body 302 case frame (deformation suppressing member)

Claims (1)

[Claims] 1. An observation window is provided on a side surface of the tip body, and a tip case for covering the outer surface of the tip body except at least the observation window portion is detachably provided on the tip body. At the tip of the side-viewing endoscope, the tip case is formed of a case body made of an elastic material, and deformation suppression provided integrally with the case body so as to suppress deformation of the case body. Formed with members,
A side view type internal view characterized in that a communication passage for sending fluid toward the surface of the observation window and a nozzle communicating with a fluid passage formed in the tip end main body are formed in the tip case. The tip of the mirror.