JPH10127578A - Endoscope - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an endoscope having a tip end cover member with an easily detachable cover member and capable of reducing labor of cleaning to suppress work efficiency to be lowered. SOLUTION: A tip end part 6 of this endoscope is equipped with a tip end constituting part 10 and a tip end cover member 16 detachable on the tip end constituting part 10 and with an outer periphery face almost flush with the same. A lighting lens 13, an objective lens 14, etc., are mounted on a tip end face 10a of the tip end constituting part 10 and a treatment equipment inserting channel 15 is opened. The tip end cover member 16 is equipped with a nozzle 18 which is communicated with a fluid pipe line inserted into the tip end constituting part 10 and whose air and water sending direction is direction to the objective lens 14. A notch part 19 is equipped in between the border of the cover member 16 of the tip end constituting part 10 and an engaging part to engage with a claw part of a jig is formed by the end face 16a of the rear end of the tip end cover member 16 and the notch part 19.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a distal end cover provided detachably with respect to the distal end of an endoscope inserted into a body cavity, and having a nozzle formed for cleaning an observation system or the like of the endoscope. The present invention relates to an endoscope having a member.

[0002]

2. Description of the Related Art When an endoscope is inserted into a body cavity to observe the inside of the body cavity, a body fluid in the body cavity or a contrast agent used in an endoscope treatment adheres to the surface of an observation window of the endoscope. There is. Therefore, a nozzle is provided at the end of the endoscope for removing body fluid and the like attached to the surface of the observation window by ejecting water or air.

However, when an endoscope is inserted into a body cavity, a body fluid or the like may enter the nozzle from its opening due to a pressure difference between the body cavity and the nozzle. In this case, if the inside of the nozzle is not thoroughly washed to remove body fluid and the like, the body fluid and the like may adhere to the nozzle and clog the inside of the nozzle, making it impossible to supply air or water.

Therefore, as one means for solving the above-mentioned problem, as shown in Japanese Utility Model Publication No. 64-6804, a nozzle is provided on a distal end cap which is detachable from the distal end of the endoscope, and the nozzle is used for cleaning. It is known that the end cap is detached from the end of the endoscope so that the nozzle and the periphery of the nozzle can be easily cleaned. However, since the tip cap is a small component, has the same diameter as the endoscope tip, and is formed without unevenness, it is difficult to perform the attachment / detachment operation from the endoscope tip.

In Japanese Patent Application Laid-Open No. 7-313439, a dedicated jig is used for attaching and detaching the tip cap from the endoscope end, and a jig engaging recess engaging with the jig is provided in the tip cap. The end cap is easily attached to and detached from the endoscope end by providing the end cap. In Japanese Patent Application Laid-Open No. 8-29700, a recess for engaging a human finger is provided in the end cap. ,
An example in which the tip cap can be easily attached and detached from the tip of the endoscope is shown.

[0006]

However, Japanese Patent Application Laid-Open Nos. Hei 7-313439 and Hei 8-2970 describe the above.
The distal end of the endoscope described in Japanese Patent Application Publication No. 0-200400 is provided with a concave part having a corner at a corner on the outer peripheral surface of a detachable distal end cover member (a distal end cap) at the distal end of the endoscope. The distal end cover member can be removed from the distal end of the endoscope by engaging a tool or a finger of a person. In this case, dirt such as body fluids easily accumulates in the recesses, and it is difficult to remove accumulated dirt by washing. In particular, since a cleaning brush or a sponge hardly hits the corner where the inner corner of the concave portion is formed, hand cleaning is a very labor-intensive operation, so that the work efficiency is reduced.

The present invention has been made in view of the above circumstances. It is an object of the present invention to easily attach and detach a tip cover member with a nozzle from a tip of an endoscope with a jig or the like.
Further, it is an object of the present invention to provide an endoscope which can reduce the labor for cleaning and improve the working efficiency.

[0008]

According to the present invention, in order to achieve the above object, the present invention is designed to be detachable from a distal end component provided at the distal end of an insertion portion to be inserted into a body cavity and to be inserted through the insertion portion. A jig for removing the distal end cover member from the outer peripheral surface of the distal end of the insertion portion, the endoscope having a distal end cover member formed with a nozzle communicating with a fluid conduit opened to the distal end configuration portion. Is formed in a concave shape, and a corner of the concave engaging portion is formed by a concave surface connected by a smooth curved surface.

As described above, the engaging portion of the jig for pulling out the distal end cover member from the distal end of the endoscope is provided on the outer peripheral surface of the insertion portion of the endoscope in a concave shape whose corners are connected by a smooth curve. Therefore, using this jig, the distal end cover member can be easily removed from the distal end of the endoscope, and dirt such as bodily fluids is difficult to accumulate in the engagement portion. By washing, dirt can be easily removed.

[0010]

Embodiments of the present invention will be described below with reference to the drawings.

1 to 9 show a first embodiment, and FIG.
1 shows an overall view of an endoscope 1 using the distal end structure according to the first embodiment of the present invention, and FIG. 2 is an enlarged view of the distal end 6 of the endoscope 1 shown in FIG. is there.

As shown in FIG. 1, the endoscope 1 includes an insertion section 3, an operation section 2, and a universal cord section 4 which are inserted into the body cavity from the distal end side. The insertion portion 3 has such a thickness that it can be inserted into a body cavity, and has a configuration in which a distal end portion 6, a curved portion 7, and a flexible tube portion 8 are sequentially connected in series from the distal end. A connector 5 is provided at the tip of the universal cord portion 4 so as to be connected to a light source device (not shown).

FIG. 2 shows a structure of a distal end portion 6 which is a portion on the distal end side of the insertion portion 3. As shown in FIG. 2, a light guide 11 is provided on a distal end component 10 constituting the distal end portion 6.
And an image sensor 12 are arranged, and an illumination lens 13 that expands and emits illumination light supplied from the light source device via the light guide 11 is provided on the distal end side of the light guide 11, An objective lens 14 for forming a subject image on the image sensor 12 is attached. The image sensor 12 and the objective lens 14 constitute an observation system of the endoscope 1.

Further, the distal end portion 6 is provided with a distal end cover member 16 which is detachable from the distal end constituting portion 10. A nozzle 18 which communicates with an air supply / water supply port 17 as a fluid conduit opened to the distal end component 10 and opens toward the objective lens 14 and selectively jets water and air into the distal end cover member 16. Is provided.

As shown in FIG. 3, a treatment instrument insertion channel 15 is opened at the distal end face 10a of the distal end portion 10, and a curved portion 7 is connected to the rear end side of the distal end portion 10. Have been.

As shown in FIG. 3, the tip cover member 16 is formed in a substantially cylindrical shape so as to fit into the tip component 10,
In addition, when the distal end cover member 16 is mounted on the distal end component 10, the outer peripheral surface of the distal end cover member 16 and the outer peripheral surface of the distal end component 10 are formed to be substantially the same surface. The nozzle 1 is installed so that the air / water supply direction always faces the objective lens 14 when the
8 are provided.

Next, the tip component 10 and the tip cover member 1
As shown in FIG. 3, at least a part of the boundary of the outer peripheral surface of the outer peripheral surface of
Notch 19 so that the diameter is smaller than the outer peripheral surface of
Is provided. The tip cover member 16 is the tip component 1
In the state of being attached to the front end portion 0, the notch portion 19 and the notch portion 21 of the jig 23, which will be described later, fit into the notch portion 19 at the rear end surface 16 a of the front end cover member 16. It forms a joint (recess).

In a state in which the tip cover member 16 is removed from the tip component 10, as shown in FIG. 4A, the notch 19 is formed by the notch 19 and the tip cover member 1.
6 are provided on the edge of the step portion 20 provided so as to be substantially flush with the surface, and are notched in a concave shape so as not to be deeper than the step amount of the step portion 20.

Furthermore, the surfaces constituting the concave portions are connected to each other by curved surfaces 49 so that the corners of the concave portions formed by the cutout portions 19 are rounded, and the concave portions are formed as concave surfaces. Further, the notch 19 provided in the distal end component 10 is formed such that the notch gradually widens toward the distal end. When the curved surface 49 provided at this corner is an arc surface, the radius is desirably 0.2 or more. The element diameter of the brush used for cleaning is d,
When the radius of R is R, it is desirable to satisfy R ≧ d.

Further, as shown in FIG. 4 (B), the notch 19 is formed by cutting the edge of the stepped portion 20 in an arc shape with a cutting tool, so that the notch 19 does not become a flat surface or a remarkably concave surface. It may be formed by the curved surface 49a. This notch 1
It is desirable that at least one or more 9 be provided on the outer periphery of the distal end portion 6, or be provided at mutually symmetrical positions on the outer periphery of the distal end portion 6. Are provided at mutually symmetrical positions.

The ridge forming the boundary between the notch 19 and the tip constituting portion 10 may be smoothly chamfered so that no ridge is formed or no edge is formed.

Also, a jig 2 for removing the tip cover member 16 formed as described above from the tip component 10 is provided.
3 is shown in FIG. As shown in FIG. 5, the jig 23 has a gripping member 22 formed in a U-shape when viewed from the side, and fits into the above-described notch 19 as shown in FIG. By doing so, the claw portions 21 for engaging and holding the front end cover member 16 are provided inside the both ends of the gripping member 22.

The claw 21 is freely engageable with the rear end face 16a of the front cover member 16, that is, the claw 21 is
The curved portion 24 is elastically deformable so as to be movable in the radial direction. Curved part 2 of at least jig 23
4 is desirably made of an elastic body (resin) such as polysulfone or a metal having spring properties.

As shown in FIG. 5 (B), the jig 23 has a curved portion 24 as an engageable means made of an elastic body.
Sets the distance a between the claws 21 and 21 to, for example, 5 to 20 m.
It can be adjusted arbitrarily within the range of m.

With the above-described structure, as shown in FIG. 6, the operator holds the jig 23 with one hand and holds the vicinity of the end of the endoscope 1 with the other hand to cut the claw 21. Notch 1
9 to engage and clamp the front end cover member 16. FIG. 7 shows an enlarged view of the tip 6 at that time. And
By pulling the jig 23 while the claw portion 21 is engaged with the distal end cover member 16, the operator can remove the distal end cover member 16 from the distal end component 10 as shown in FIG. 8.

The curved portion 24 of the jig 23 can arbitrarily adjust the distance a between the claws 21 and 21 within the range of 5 to 20 mm as described above. As shown in (C), the distal end cover members 16b, 16c, and 16d having different diameters such as b, c, and d are fitted to the notch portions 19 of the distal end configuration portion 10 so that the distal end cover members 16 have the distal end configuration. It can be removed from the part 10. In the illustrated example, the diameter b of the tip cover members 16b, 16c, 16d,
It is assumed that c and d are b>c> d.

According to the present embodiment, the use of the jig 23 allows the tip cover member 16 to be easily removed from the tip component section 10 and also allows the jig 23 to be removed from the tip cover member 16.
A notch 19 is formed at the boundary surface between the tip cover member 16 and the tip component 10, and the notch 19 is removed from the tip component 10 to form an engagement portion. (The end face 16 of the rear end of the tip cover member 16)
a) is eliminated, and a brush or the like easily enters the concave portion formed by the notch portion 19, so that the notch portion 19 itself is cleaned as compared with the case where the concave portion in which the jig 23 is engaged is provided in the front cover member 16 itself. Labor is significantly reduced. In particular, dirt and the like are likely to remain without having the curved surface 49 at the corners, and in the concave portion having a depth enough to be engaged with the jig, it is difficult for the brush hair to hit every corner, and it takes much time for cleaning, This is not necessary in the present invention.

When the tip cover member 16 is removed, the tip component 10 is exposed, and the notch 19 is completely exposed. In addition, the surface constituting the notch 19 is a concave portion without a corner, a flat surface or a smooth curved surface. Therefore, even if dirt adheres to the notch 19, it can be easily washed. In particular, when the ridge forming the boundary between the notch 19 and the distal end component 10 is chamfered or the like and has no ridge, the cleaning performance is better.

Also, the curved portion 24 of the jig 23 undergoes elastic deformation, and the distance a between the claws 21 and 21 of the jig 23 increases or decreases. However, it is possible to freely fit into the engaging portion formed by the cutout portion 19, and one jig can cope with attachment and detachment of several types of tip cover members, so that the jig can be minimized. Thus, there is an effect that the operator can easily operate the front end cover member without making the preparation and operation of the jig complicated.

FIG. 10 shows the second embodiment. The same components as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted. In the present embodiment, the notch 19 is provided not at the tip component 10 but at the end face 16a at the rear end of the tip cover member 16 as shown in FIG.
Reference numeral 9 denotes a cutout having a bottomless shape penetrating the outer peripheral wall portion of the tip cover member 16 in the radial direction so that the cutout surface 25 on the tip end side of the cutout portion 19 does not become significantly concave. It is an arc surface.

By forming the notch portion 19 in this manner, the claw portion 21 of the jig 23 engages with the notch surface 25 of the notch portion 19, and the jig 23 is pulled out as it is, so that the tip cover is formed. The member 16 can be withdrawn from the tip component 10.

According to the present embodiment, by using the jig 23, the tip cover member 16 can be easily operated, and in this embodiment, when the tip cover member 16 is washed, the notch portion 19 has the bottom. Since the end face is not a concave part but penetrated and has an arc-shaped end face, dirt does not accumulate at the bottom, and even if dirt is attached, it can be easily removed with a brush or the like. In particular, when the ridge forming the boundary between the notch 19 and the tip cover member 16 is chamfered or the like so that there is no ridge, the cleaning performance is better.

As shown in FIG. 10 (B), the notch 19 has a trapezoidal notch 25 having a narrower tip end and a rounded corner than an end face 16a at the rear end of the tip cover member 16. It may be formed. The notch 19 provided in the front cover member 16 is formed such that the notch gradually widens from the front end toward the rear end face 16a.

FIG. 11 shows a third embodiment, in which the same components as those in the first and second embodiments are denoted by the same reference numerals and description thereof is omitted.

As shown in FIG. 11 (A), a notch formed by an arc-shaped curved surface 49b which is cut across the edge of the front end cover member 16 and the front end portion 10 in an arc shape with a blade. A part 19 is provided.

As shown in FIG. 11 (B), the notch 19 on the side of the distal end component 10 is formed with a curved surface having no corner at the bottom, and the notch 19 has a notch.
The notch 19 on the side may be notched in a trapezoidal shape with a corner having an arcuate surface.

When the distal end cover member 16 is mounted on the distal end portion 10, the recessed engaging portion is formed by the notch portion 19 and the distal end portion 1, which are configured as described above.
0.

The ridge forming the boundary between the leading end component 10 and the notch 19 may be smoothly chamfered so that no ridgeline or edge is formed.

With the above-described configuration, the claw portions 21 and 21 of the jig 23 are fitted into the
, And the jig 23 is pulled out as it is, whereby the distal end cover member 16 can be removed from the distal end component 10.

According to the present embodiment, the use of the jig 23 allows the distal end cover member 16 to be easily removed from the distal end component 10, and in the present embodiment, the distal end cover member 1
When cleaning 6, the notch 19 is constituted by the curved surface 49 or the like, so that the dirt does not accumulate on the bottom, and even if the dirt adheres, the dirt can be easily removed with a brush or the like.

When the distal end cover member 16 is removed, the distal end component 10 is exposed, and the notch 19 on the distal end component 10 side is completely exposed, and the notch 19 itself is not a concave portion having a corner. Therefore, even if dirt adheres to the notch 19, it can be easily washed. In particular, when there is no ridgeline of the notch 19 of the distal end component 10, the cleaning property is better.

Further, as shown in FIG.
In the third embodiment, the cutout portion 19 is provided only on the distal end component 10 or the distal end cover member 16, or over the distal end cover member 16 and the distal end component portion 10, and over the entire outer periphery of the distal end portion 6. In this case, in addition to the above-described functions and effects, there is an effect that the distal end cover member 16 can be removed from the distal end component 10 without positioning the jig 23 in the rotation direction.

The concave engaging portion formed by the notch 19 and the like is formed so that the notch gradually expands in the radial direction toward the opening rather than the width of the bottom. Also, the width of the opening is formed wider.

In the first to third embodiments, a large number of notches 19 and claws 21 may be provided to engage with each other.

Further, the notch 19 is provided at the tip cover member 1.
6 is gradually cut away toward the rear end side or the step portion 20 side, the exposed side is largely cut off when the tip cover member 16 is pulled out from the tip component section 10, so that a brush or the like is used. Is easy to enter and easy to wash.

In the first to third embodiments, the jig 23 may take the following forms.

As described above, this jig 23 is provided with the claw portion 21 which engages with the notch portion 19. This claw part 2
As shown in FIG. 13, 1 is free to engage with the end surface 16 a of the rear end of the front cover member 16, that is, the gripping member 22 having the claw 21 at the end can move in the radial direction of the front end 6. A shaft support portion 26 for supporting the holding member 22 is provided so that the holding member 22 can move.

Also in this case, the shaft support 26 as the engageable means is set so that the distance between the claws 21 is arbitrarily set within a certain range. The certain range is, for example, about 5 to 20 mm. There is. The shaft support 26
Is preferably made of a metal such as stainless steel or a resin such as polysulfone.

In the first to third embodiments, the jig 23
Is made of a metal such as stainless steel, and the bent portion 24 may have a desired amount of elasticity. For example, the bent portion 24 may be formed of a molded product such as a resin made of polysulfone. There is also an effect that the cover member 16 and the distal end component 10 are not damaged.

The distal end cover member 16 is connected to the distal end portion 1.
0 of the distal end cover member 16 when attached to the
The fixing method to the front cover member 16 includes the front cover member 16 and the front component 1.
0, the tip cover member 16 and the tip component 10
Engagement means such as engagement between the protrusions provided in the above, or engagement between the recess and the protrusion.

The tip portion 10 may be made of resin or metal. In the case of resin, the tip component 10 may be integrally formed using a resin such as polysulfone, polyphenylene sulfide, or polycarbonate. Alternatively, in the case of metal, it may be processed with SUS303 or SUS304.

In the case of metal, at least the portion exposed to the outer surface when the tip cover member 16 is mounted is covered with an insulating member made of the above resin to form the tip component 10.
Is configured. In other words, the distal end component 10 includes the insulating portion that is exposed on the outer surface and is made of an insulating member made of resin and the distal end made of metal. Further, the distal end component 10 may be made of an integral resin as described above.

The tip cover member 16 is made of the above-mentioned resin or elastomer, and the tip component 10 is made of the above-mentioned resin or metal.
The hardness of the material of the distal end component 6 and the hardness of the distal end component 10 is smaller at least in the portion where the distal end cover member 16 and the distal end component 10 are in contact.

A jig 23 is provided with a pivotal support 26 as shown in FIG. 13 or a curved portion 2 of the jig 23 as shown in FIG.
4 undergoes elastic deformation, and the distance a between the claws 21 and 21 of the jig 23 increases and decreases, so that the engaging portion formed by the notch portion 19 of the tip cover member having a different outer diameter dimension is formed. The jigs can be freely engaged, so that one jig can cope with attachment and detachment of several types of tip cover members, and the jigs can be of a minimum type. Thus, there is an effect that the operator can easily operate the front end cover member without making the preparation and operation of the jig complicated.

According to the above-described embodiment, the following configuration is obtained.

(Supplementary Note 1) A fluid conduit that is detachable from a distal end component provided at the distal end of the insertion portion inserted into the body cavity, is inserted through the insertion portion, and is open to the distal end component. In an endoscope having a distal end cover member provided with a communicating nozzle, an engaging portion for engaging a jig for removing the distal end cover member is provided on an outer peripheral surface of a distal end of the insertion portion in a concave shape. An endoscope, wherein a corner of the engaging portion is formed by a concave surface connected by a smooth curved surface.

(Supplementary Note 2) The endoscope according to Supplementary Note 1, wherein adjacent surfaces of the concave surface continuously formed on the curved surface are provided on an integral member that is not divided.

(Supplementary note 3) The endoscope according to supplementary note 1, wherein the curved surface is an arc surface.

(Supplementary note 4) The endoscope according to Supplementary note 3, wherein the radius R of the arc surface satisfies R ≧ d, where d is the element diameter of the brush for cleaning the endoscope.

(Supplementary note 5) The endoscope according to supplementary note 4, wherein a radius R of the arc surface is 0.2 or more.

(Supplementary Note 6) At least a part of the boundary between the outer peripheral surface of the distal end component and the outer peripheral surface of the distal end cover member is provided with an engaging portion for engaging a jig for detaching the distal end cover member from the distal end component. 2. The endoscope according to claim 1, wherein the endoscope is provided.

(Supplementary note 7) The endoscope according to supplementary note 1, wherein the engaging portion is provided on a distal end cover member.

(Supplementary Note 8) The supplementary portion is characterized in that the engaging portion is formed by cutting out a part of a front end cover member, and the concave bottom surface is formed by an outer peripheral surface of a front end constituting portion. 7. The endoscope according to 7.

(Supplementary Note 9) The engaging portion is formed by a cutout portion formed by cutting off a part of the outer peripheral surface of the front end constituting portion and a rear end surface of the front end cover member. The endoscope according to attachment 1.

(Supplementary Note 10) The notch is formed such that when the tip cover member is attached to the tip component, at least a part of the outer peripheral surface of the tip component is smaller than the outer diameter of the tip cover member. 10. The endoscope according to claim 9, wherein a recess is formed between the notch and the end face of the rear end of the tip cover member.

(Supplementary Note 11) The cut-out portion is larger than the outer peripheral surface of the portion of the distal end component where the distal end cover member is inserted.
The endoscope according to claim 10, wherein the endoscope is provided so as not to be concave on the inner diameter side.

(Supplementary Note 12) The endoscope according to supplementary note 1, wherein at least one or more of the engaging portions is provided.

(Supplementary note 13) The endoscope according to supplementary note 12, wherein the engaging portion is provided at a position symmetrical in a radial direction at a distal end of the endoscope.

(Supplementary note 14) The endoscope according to supplementary note 12, wherein the engaging portion is provided on the entire periphery of the distal end of the endoscope.

(Supplementary Note 15) The supplementary note 1 characterized in that both the leading end component and the leading end cover member are made of resin.
The endoscope as described.

(Supplementary Note 16) The distal end cover member is made of resin, and when the distal end cover member is attached to the distal end portion, at least a portion exposed to the outer surface of the distal end portion is covered with an insulating member. The endoscope according to claim 1, wherein the endoscope is configured.

(Supplementary Note 17) The supplementary part is characterized in that the tip end portion is made up of a tip end and an insulating portion made of an insulating member, the tip end being made of metal, and the insulating portion being made of resin.
The endoscope as described.

(Supplementary note 18) The endoscope according to supplementary note 16, wherein the distal end constituting portion is an integral resin.

(Supplementary Note 19) The hardness of the resin of the tip cover member and the hardness of the resin of the tip component are determined by the following formula:
19. The endoscope according to any one of supplementary notes 15 to 18, wherein the endoscope is a distal end component.

(Supplementary Note 20) The endoscope according to Supplementary Note 1, wherein a claw portion engaging with the engaging portion is provided, and a tip cover member is attached and detached.

(Supplementary note 21) Supplementary note 8 wherein the width of the notch is wider at the rear end than at the front end.
The endoscope as described.

(Supplementary note 22) The endoscope according to supplementary note 21, wherein the notch portion is provided so as to gradually widen from a front end side to a rear end side.

(Supplementary Note 23) The cutout has a width on the front end side larger than that on the rear end side, and is further characterized in that the notch is wider than the width on the rear end side.
The endoscope as described.

(Supplementary note 24) The endoscope according to supplementary note 23, wherein the cutout portion is formed so as to gradually widen from a rear end side to a front end side.

(Supplementary note 25) The endoscope according to supplementary note 1, wherein the width of the opening of the engaging portion is wider than the width of the concave bottom.

(Supplementary Note 26) The supplementary note 2 is characterized in that the engaging portion is formed so as to gradually spread from the bottom to the opening.
5. The endoscope according to 5.

(Supplementary Note 27) A tip cover member which is detachable from the tip component of the endoscope and has a nozzle formed in communication with a fluid conduit opened to the tip component, and an engagement provided on the tip cover member An endoscope set including a jig that engages with a portion of the distal end cover member and detachably attaches and detaches the distal end cover member. A jig characterized by:

(Supplementary Note 28) At least one or more engaging portions are provided on the outer peripheral surface of the distal end of the endoscope, and the jig is provided with at least two or more claws that engage with the engaging portions. ,
The jig engages the engaging portion with the engaging portion in such a manner as to hold the distal end portion of the endoscope, and the engageable means is a movable portion provided so that the holding width is variable. 28. The jig according to attachment 27, wherein the jig is provided.

(Supplementary note 29) The jig according to Supplementary note 28, wherein the movable portion is an elastically deformable portion that changes a holding width by elastic deformation.

(Supplementary Note 30) The supplementary note 28, wherein the movable portion is a shaft supporting portion that rotatably supports a claw portion that engages with an engaging portion and that has a variable holding width. Jig.

(Supplementary Note 31) The engaging portion in Supplementary Note 28 is
An endoscope, wherein the endoscope is the engagement portion described in Supplementary Note 1.

(Supplementary Note 32) The endoscope according to Supplementary Note 27, wherein the materials of the tip end cover member and the tip end component are those described in any of Supplementary Notes 16 to 19.

(Supplementary Note 33) The jig according to supplementary note 29, wherein the movable portion is made of resin.

(Supplementary note 34) The endoscope or the jig according to any one of supplementary notes 15, 17, 18, and 33, wherein the resin is polysulfone.

(Supplementary Note 35) The supplementary note 15, the supplementary note 1, wherein the tip cover member is made of polycarbonate.
33. The endoscope according to any one of Supplementary Note 6 and Supplementary Note 32.

(Supplementary Note 36) The supplementary note 15, wherein the distal end component is made of polyphenylene sulfide.
33. The endoscope according to any of supplementary notes 18 and 32.

(Supplementary Note 37) The supplementary note 15 and the supplementary note 16, wherein the distal end cover member is made of an elastomer.
An endoscope according to any one of the above.

(Supplementary note 38) The jig according to supplementary note 29, wherein the movable portion is made of metal. (Supplementary note 39) The jig according to supplementary note 38, wherein the metal is stainless steel.

(Supplementary note 40) The endoscope according to supplementary note 9, wherein an outer peripheral surface of the notch portion and the distal end portion is formed to be continuous by a curved surface.

According to Supplementary Notes 1 to 26 and Supplementary Note 40, the engaging portion of the jig for pulling out the distal end cover member from the distal end of the endoscope is provided with a curved portion having a smooth corner portion on the outer peripheral surface of the insertion portion of the endoscope. The end cover member can be easily removed from the end of the endoscope using a jig, and dirt such as bodily fluids will not accumulate in the engagement part. Even in the case of accumulation, dirt can be easily removed by washing.

Supplementary notes 3 to 5, Supplementary notes 21 to 26 and Supplementary note 40
According to this, since the engaging portion of the jig for pulling out the distal end cover member from the distal end of the endoscope is provided on the outer peripheral surface of the insertion portion of the endoscope in a concave shape whose corners are connected by a smooth curve, The end cover can be easily removed from the end of the endoscope using a jig, and dirt such as bodily fluids will not accumulate in the engaging part. Can remove waste. In addition, since a cleaning tool such as a brush can easily enter the engaging portion, the time and effort for cleaning the engaging portion is further reduced.

According to Supplementary Note 10, the engaging portion of the jig for pulling out the distal end cover member from the distal end of the endoscope is formed into a concave shape in which the corners are connected to the outer peripheral surface of the insertion portion of the endoscope by a smooth curve. The end cover member can be easily removed from the end of the endoscope by using a jig, and the engaging portion becomes difficult to collect dirt such as bodily fluids. By washing, dirt can be easily removed.
In addition, the jig can be smoothly engaged with the tip cover and can be pulled out by not providing a concave portion more than necessary in the cutout portion of the tip component. In particular, since the concave portion is provided only in the distal end component, the labor for cleaning the distal end cover member can be reduced.

According to appendix 11, the engaging portion of the jig for pulling out the distal end cover member from the distal end of the endoscope is formed in a concave shape having a smooth curved corner at the outer peripheral surface of the insertion portion of the endoscope. The end cover member can be easily removed from the end of the endoscope by using a jig, and the engaging portion becomes difficult to collect dirt such as bodily fluids. By washing, dirt can be easily removed.
In addition, by not making the concave amount more than necessary, it is possible to minimize the accumulation and cleaning of dirt.

According to Supplementary Note 16, the engaging portion of the jig for pulling out the distal end cover member from the distal end of the endoscope is formed into a concave shape whose corner is connected to the outer peripheral surface of the insertion portion of the endoscope by a smooth curve. The end cover member can be easily removed from the end of the endoscope by using a jig, and the engaging portion becomes difficult to collect dirt such as bodily fluids. By washing, dirt can be easily removed.
Moreover, without exposing the metal on the surface of the insertion section of the endoscope,
By covering the distal end surface with an insulating member, electrical safety can be ensured.

According to Supplementary Note 19, the engaging portion of the jig for pulling out the distal end cover member from the distal end of the endoscope is formed into a concave shape in which the corners are connected to the outer peripheral surface of the insertion portion of the endoscope by a smooth curve. The end cover member can be easily removed from the end of the endoscope by using a jig, and the engaging portion becomes difficult to collect dirt such as bodily fluids. By washing, dirt can be easily removed.
In addition, according to Supplementary Notes 27 to 32, which can suppress wear of the distal end component, any kind of engaging portion, that is, a jig that can be engaged with any distal end cover member, allows the type of the jig to be reduced. It will be kept to a minimum and will be easy for operators to operate.

According to Supplementary Notes 33 to 34 and Supplementary Notes 38 to 39, the interval between the claw portions of the jig can be increased or decreased, so that one jig can cope with attachment and detachment of several types of tip cover members.

According to Supplementary Notes 35 to 37, electrical safety can be secured by covering the distal end surface with the insulating member without exposing the metal to the surface of the insertion portion of the endoscope.

According to appendix 6, since the engaging portion is provided at the boundary surface between the distal end cover member and the distal end component, the supply portion is exposed to the outside if the distal end cover member is removed from the distal end component. There is an effect that a cleaning tool such as a brush can be easily inserted and cleaning can be easily performed.

According to Supplementary Note 8, the bottom surface of the notch provided in the tip cover member is formed by the outer peripheral surface of the tip component, and the notch of the tip cover member penetrates in the radial direction and has no bottom. In addition, since there is no accumulation of dirt on the bottom surface and a cleaning tool such as a brush can be easily inserted, there is an effect that the labor for cleaning can be reduced.

According to Supplementary Note 9, since the concave portion is provided only in the front end constituting portion, the labor for cleaning the front end cover member can be reduced.

Also, there are various types of endoscopes, and the jig is engaged due to various diameters of the outer circumference of the distal end of the endoscope or dimensional restrictions of an observation system or the like. Since the positions of the engaging portions are also various, conventionally, various jigs for removing the distal end cover member of the endoscope from the distal end constituting portion have been required. Therefore, the operator of the jig has a problem that the preparation and operation of the jig are complicated and the work efficiency is low.

FIGS. 14 to 23 show the structures of a jig and an endoscope which have solved the above-described problems. The end cover member can be pulled out by one jig even with endoscopes of various sizes. It is made to be able to escape.

FIG. 14 to FIG. 19 show a first disclosed example of the structure of the jig and the endoscope, and the same components as those of the first to third embodiments are denoted by the same reference numerals and description thereof is omitted.

As shown in FIG. 14, the distal end cover member 16 of the embodiment of the present disclosure has an elliptical opening 27 at one end at its distal end face 16e to form the engaging portion. A hole 28 is formed. The shape of the fitting hole 28 is changed from an elliptical shape to a circular shape as the section goes from the opening 27 to the rear end side.
As shown in (C) to (D), the major axis y1 and the diameter of the rear end 29a of the fitting hole 28 whose section changes are the same as the major axis x1 of the opening 27. The fitting hole 28 is a hole that penetrates through the tip cover member 16.

Also, the jig 30 engaging with the fitting hole 28
As shown in FIG. 14, a contact portion 31 which is an example of a fitting member as an engageable means having an elliptical cross section to be inserted into the fitting hole 28 is provided at the tip of the jig 30. I have.
The abutting portion 31 is formed so that the cross-section thereof is gradually reduced to a circular shape or an elliptical shape toward the rear end side of the jig 30. Here, the relationship between the opening 27, the cross-section changing portion 29, and the contact portion 31 is such that the long diameter of the opening 27 is x1, the short diameter is x2, the long diameter of the cross-section changing portion 29 is y1, the short diameter is y2, and the contact is. Assuming that the major axis of the part 31 is z1 and the minor axis is z2, x1 = y
It is formed so that 1> z1 ≧ y2>x2> z2.

The fitting hole 28 and the jig 3 shown in FIG.
FIGS. 15 (A) to 15 (D) show the above-described relationship in the axial longitudinal section of 0 and the arrow view in the radial direction thereof. FIG.
FIG. 15A is a sectional view of the jig 30 in the axial direction, and FIG.
(B) shows a view on arrow A in FIG.
(C) shows a sectional view of the fitting hole 28 of the distal end cover member 16 in the axial direction, and FIG. 15 (D) shows a view on arrow B in FIG. 15 (C).

With the above-described configuration, the contact portion 3 of the jig 30
When 1 is inserted into the fitting hole 28 from the opening 27, the contact portion 31 fits into the fitting hole 28 as shown in FIG. FIG. 16A is a sectional view of the fitting hole 28 and the jig 30 in the axial direction, and FIG.
FIG.

Here, when the jig 30 is rotated about its axis, a part of the contact portion 31 comes into contact with the cross-section changing portion 29 as shown in FIG. At this time, a part of the outer periphery in the major diameter direction of the contact portion 31 comes into close contact with the wall surface of the cross-section changing portion 29 as shown in FIG. In this state, FIG.
Even if the jig 30 is pulled as shown in FIG.
Cannot be removed from the fitting hole 28. FIG. 17A is a sectional view of the fitting hole 28 and the jig 30 in the axial direction, and FIG.
FIG. 7 (B) is a view as viewed from the direction of arrow D in FIG. 17 (A).

Then, when the jig 30 is pulled out as it is, the distal end cover member 16 also follows the jig 30, and FIG.
As shown in (1), the tip cover member 16 is removed from the tip component 10.

Here, as shown in FIGS. 19A to 19C, the short diameter x2 of the opening 27 and the long diameter z of the contact part 31 are set.
Even if the dimension of 1 changes, z1> x2, z1 <x1 in all the combinations of the tip cover member 16 and the jig 30.
Opening 27 of the tip cover member 16 so that
And the contact part 31 of the jig 30 is formed. FIG.
(A)-(C) are the figures seen from the direction of arrow E in FIG. 18, and in the figure, x1a, x1b, x1c and x2
a, x2b, x2c are x2a <x2c <x2b <z
1, z1 <x1a <x1b <x1c.

The contact portion 31 may be made of a resin such as polysulfone or a metal such as stainless steel.

According to the present disclosure, by using the fitting hole 28 and the jig 30 having the above-described geometric relationship,
With one kind of jig 30, all the distal end cover members 16 can be removed, so that the person who handles the endoscope 1 does not use the wrong jig 30 and can easily handle the endoscope 1. There is an effect that can be done.

The fitting hole 28 is a through-hole, and has no step inside and a smoothly changing cross-sectional shape. Therefore, even when dirt adheres to the fitting hole 28, a brush or the like is used. It can be easily washed and filth can be easily removed.

FIGS. 20 to 22 show the second disclosure example. The same components as those in the first to third embodiments and the first disclosure example are denoted by the same reference numerals, and description thereof is omitted.

As shown in FIG. 20, the distal end cover member 16 of the present disclosure is provided with a fitting hole 33 which has an opening 32 at one end at the distal end face 16e and constitutes the engaging portion. As shown in FIG. 22 (A), the fitting hole 33 has a step portion 34 whose inside diameter is increased in one step inside, and an enlarged portion 35 extending to the rear end side while keeping the inside diameter of the step portion 34.

The fitting hole 33 is a through hole penetrating from the front end face 16e to the rear end side in the front end cover member 16.

A jig 36 inserted into the fitting hole 33 and engaged with the step 34 is provided as shown in FIG. 20, and the jig 36 is formed in a U-shape when viewed from the side. The jig 36 has a claw 37 protruding outward for engaging with the step 34 at the tip of the grip 39. The jig 36 is provided with a movable portion 38 as an engagement free means that allows the claw portion 37 to be movable in the radial direction of the fitting hole 33.

Here, at least the movable portion 38 of the jig 36 is made of an elastic member made of resin such as elastically deformable polysulfone, and the claw portion 37 and the movable portion 38 are provided.
By pressing the grip portion 39 having at the end in the direction in which the claw portion 37 does not protrude, that is, inward, the movable portion 38 is elastically deformed, and the claw portion 37 moves inward. Further, the movable portion 38 may be made of a metal such as stainless steel or the like, and may be elastically deformable as described above.

The fitting hole 33 and the jig 3 shown in FIG.
FIG. 22 (A) shows an axial longitudinal section of No. 6.

Here, in all combinations of the fitting hole 33 and the jig 36, the distance a between the claws 37, 37 is minimized by the elastic deformation of the movable part 38, and the diameter b of the opening 32 Are formed such that aa <b.

With the configuration described above, the tip of the jig 36 is
The jig 36 is pressed into the opening 32 as shown in FIG.
From the fitting hole 33. At this time, the jig 36 is moved by the elastic deformation of the movable portion 38 so that the distance a
Is pressed and moved in a direction to shrink until the distance becomes aa. Then, when the jig 36 is inserted into the fitting hole 33 as it is, the claw portion 37 reaches the step portion 34. Here, when the pressing of the grip portion 39 is stopped, the movable portion 38 is stopped.
Due to the elastic restoring force, the grip portion 39 returns to the substantially original position, and the claw portion 37 engages with the step portion 34 as shown in FIG.

When the claw portion 37 is pulled out with the claw portion 37 engaged with the step portion 34, the tip cover member 16 follows the claw portion 37 as shown in FIG.
Removed from

Further, the movable portion 38 may not be formed by elastic deformation of the elastic member but may be made movable by a shaft supporting portion which supports the grip portions 39.

According to the present disclosure, by using the fitting hole 33 and the jig 36 having the above-described geometric relationship,
Since all the distal end cover members 16 can be removed with one type of jig 36, there is an effect that a person who handles the endoscope 1 does not use the wrong jig 36 and can easily handle the endoscope 1. .

In the first and second disclosed examples, as shown in FIGS. 23A and 23B, fitting holes 28 and 33 are formed in the opening of the treatment instrument insertion channel 15 of the distal end component 10. In this case, the openings of the treatment instrument insertion channel 15 and the openings 27 and 32 that are the openings of the fitting holes 28 and 33 can be shared, so that space can be saved. There is an effect that the diameter of the distal end portion 6 of the endoscope 1 can be reduced.

As described above, by being freely engageable with the engaging portions of different types, a single jig can cope with the attachment and detachment of several types of tip cover members, and the jig requires a minimum number of types. Thus, there is an effect that the operator can easily operate the front end cover member without making the preparation and operation of the jig complicated.

According to the first and second disclosed examples, the following configuration is obtained.

(Supplementary note 41) The jig according to supplementary note 27, wherein the jig is engaged with an engaging portion provided on a distal end surface of the distal end cover member.

(Supplementary Note 42) The engaging portion has a hole which opens in an elliptical shape at the distal end surface of the distal end cover member and whose cross-sectional shape changes so as to have a circular cross section toward the rear end side. The engaging means is a fitting member which can be fitted into the hole, and the fitting member is provided at the tip of the jig, and has an elliptical cross section so as to be inserted into the hole opening from the tip side. The shape is formed so as to be reduced toward a rear end side while keeping the similar shape, or to be reduced to a circular cross-section. The elliptical minor diameter of the hole and the elliptical major diameter of the jig correspond to the tip cover member and the jig. Regardless of the combination of the above, in the endoscope with the elliptical minor diameter of the hole less than the elliptical major diameter of the jig and the jig for pulling out the distal end cover member of the endoscope, By rotating the fitting member around the center of the ellipse until it comes into close contact with the hole, the tip cover member Jig note 41, wherein the the engageable.

(Supplementary Note 43) The engaging portion is a hole opened at the front end surface of the front cover member, and the inside of the hole is formed with a step portion so that the front end side and the rear end side have different hole diameters. It has a claw portion that engages with the step portion, and the engageable means is a movable portion that can be inserted into the hole portion and that allows the claw portion to move freely so as to be freely engageable with the step portion. The jig according to attachment 41, wherein

(Supplementary note 44) The endoscope and the jig according to supplementary note 42 or 43, wherein the hole and the hole communicate with a suction conduit opening opened at the distal end surface of the distal end component. .

(Supplementary note 45) The jig according to Supplementary note 43, wherein the movable portion is an elastically deformable portion that makes the claw portion movable by elastic deformation.

(Supplementary Note 46) The movable portion is a shaft supporting portion that rotatably supports a jig-side engaging portion that engages with the engaging portion so that the grip width is variable. The jig according to attachment 43.

(Supplementary note 47) The jig according to supplementary note 42, wherein the fitting member is made of resin.

(Supplementary Note 48) The jig according to supplementary note 43, wherein the movable portion is made of resin.

(Supplementary Note 49) The jig according to supplementary note 47 or 48, wherein the resin is polysulfone.

(Supplementary Note 50) The jig according to Supplementary Note 45, which is engaged with a distal end cover member made of an elastomer.

(Supplementary note 51) The jig according to supplementary note 42, wherein the fitting member is made of metal.

(Supplementary note 52) The jig according to supplementary note 51, wherein the metal is stainless steel.

(Supplementary note 53) The jig according to supplementary note 43, wherein the movable portion is made of metal.

(Supplementary note 54) The jig according to supplementary note 53, wherein the metal is stainless steel.

According to Supplementary Notes 41 to 46, Supplementary Notes 48 to 50 and Supplementary Notes 53 to 54, the jig can be engaged with any engaging portion, that is, any tip cover member, so that the type of the jig can be minimized. To be easy to operate.

According to Supplementary Note 41, by using a jig that can be engaged with any engaging portion, that is, any tip cover member, the type of the jig can be minimized and the operation can be easily performed. In addition, by providing the engaging portion on the distal end surface of the distal end cover member, it is possible to prevent the distal end of the endoscope from increasing in diameter.

According to Supplementary Note 44, by using a jig that can be engaged with any engaging portion, that is, any end cover member, the type of the jig can be minimized and the operation can be easily performed. In addition, according to the supplementary notes 47 and 49, it is possible to prevent the endoscope end from becoming large in diameter by communicating the hole and the hole with the suction conduit opening. The effect is that the part is less likely to damage the endoscope.

According to Supplementary notes 51 to 52, the contact portion, which is the fitting member, is not easily deformed, so that the distal end cover member can be more reliably pulled out of the distal end constituting portion.

Also, there are various types of endoscopes, and the end cover member is detached from the distal end component on the outer periphery and the distal end surface of the insertion portion of the endoscope due to dimensional restrictions of the observation system and the like. When the engagement portion of the dedicated jig is provided, the outer diameter of the insertion portion of the endoscope may become too large.

FIGS. 24 to 29 show the structure of a jig and an endoscope which have solved the above-mentioned problems, and can suppress an increase in the outer diameter of the insertion portion of the endoscope. Things.
24 to 29 show a third disclosure example, in which the first to third examples are shown.
The same components as those of the embodiment and the first and second disclosed examples are denoted by the same reference numerals, and description thereof will be omitted.

As shown in FIG. 24, an engaging portion 41 (opening) with which the jig 40 (shown in FIG. 25) engages in the radial direction is formed on the distal end surface 16e of the distal end cover member 16 of the embodiment of the present disclosure. It is open towards.

As shown in FIG. 25, the jig 40 is provided with a projection 42 (claw) as a portion (engageable means) that engages with the engagement portion 41.

Regardless of the combination of the tip cover member 16 and the jig 40, the opening width of the engaging portion 41 is determined by the width t of the projection 42 (shown in FIG. 25) so that the projection 42 is engaged. Are also large.

With the above-described configuration, as shown in FIG. 26, when the protrusion 42 of the jig 40 is engaged with the engagement portion 41 and the jig 40 is pulled out, the tip cover member 16 follows the jig 40. Then, it is removed from the distal end component 10.

According to the embodiment of the present disclosure, since the fitting hole 28 and the jig 30 having the above-described relationship are provided, all of the distal end cover members 16 can be removed with one type of jig 40. There is an effect that the person handling the endoscope 1 does not use the wrong jig 40 and the handling can be simplified.

The tip surface 16e of the tip cover member 16
Is provided with an engaging portion 41 with which the jig 40 is engaged, so that the engaging portion 41 does not need to be provided on the outer periphery of the distal end portion 6 of the endoscope 1 or the like. The diameter can be reduced.

The engaging portion 41 may also serve as the nozzle 18, in which case there is an effect that the space can be further reduced.

Further, two or more engaging portions 41 are provided so as to be freely engageable with the engaging portion 41, that is, a movable portion 46 is provided so that the engaging width of the protrusion 42 is movable. As shown in (A), the space between the protrusions 42 may be enlarged and reduced in the direction of arrow K. Also in this case, regardless of the jig 40 and the tip cover member 16, the protrusion 42 is
Is provided so that the tip cover member 16 can be withdrawn and removed with one kind of jig 40, and the handling is simple. The movable portion 46 is formed of an elastic member, and is movable in the direction of arrow K as shown in FIG. 27 (A), but has a grip portion 47 having a projection 42 at an end as shown in FIG. 27 (B). , 47 may be configured to be movable in the direction of arrow K by using a shaft support portion 48 for supporting the shaft. The above jig 4
0 is desirably formed of a metal such as stainless steel.

In the third disclosed example, the nozzle 18 may be provided so as to form a flow path integrally with the distal end cover member 16 as shown in FIG. 2, or as shown in FIG. The nozzle 44 (the engaging portion 4) attached to the fitting hole 43 communicating with the air / water supply port 17 provided in the tip end cover member 16.
1) is provided separately, and the nozzle 4 is provided by means such as adhesion or welding.
4 may be fixed to the distal end cover member 16 by protruding from the distal end surface 16e. Further, as shown in FIG. 29, the air supply / water supply port 17 opened at the distal end 10a of the distal end component 10 is covered,
An eaves-like shape that changes the direction of the fluid toward the objective lens 14 and the front end surface 10 of the front end component 10
Nozzle 45 (engaging portion 41) formed so as to protrude beyond a
It may be.

As described above, according to the third disclosed example,
By providing the engaging portion not on the outer peripheral surface of the distal end cover member but on the distal end surface of the distal end portion, it is possible to avoid increasing the diameter of the engaging portion and to narrow the distal end of the endoscope. As a result, it reduces pain to the patient,
This has the effect of improving the insertability of the endoscope.

According to the third disclosed example, the following configuration is obtained.

(Supplementary note 55) The endoscope and the jig according to Supplementary note 41, wherein the engaging portion is an opening that opens in the radial direction on the distal end surface of the distal end cover member.

(Supplementary Note 56) Supplementary note 27, wherein the engageable means has a claw for engaging with the opening.
The described jig.

(Supplementary note 57) The endoscope and the jig according to Supplementary note 55, wherein the opening is provided so as to protrude from a distal end surface of the distal end cover member.

(Supplementary Note 58) The endoscope and the jig according to supplementary note 57, wherein the opening is a nozzle.

(Supplementary note 59) The jig according to supplementary note 56, wherein the jig is made of metal.

(Supplementary note 60) The jig according to supplementary note 59, wherein the metal is stainless steel.

According to Supplementary Notes 55 to 58, by providing the engaging portion at the distal end, it is possible to prevent the distal end of the endoscope from increasing in diameter.

According to Supplementary Notes 59 to 60, the jig is made of metal and is not easily deformed, so that the tip cover member can be more securely pulled out of the tip component.

FIG. 30 shows the waste 51 in the nozzle 18.
5 shows a removing member 50 that removes. The removing member 50 has a triangular or trapezoidal sheet shape that is slightly narrower on the distal end side than on the proximal end side, and it is desirable that this member 50 be an elastic member made of resin such as polypropylene. . This removing member 50 is inserted into the nozzle 18 through the opening of the nozzle 18 as shown in FIG. 31, and the removing member 50 is moved back and forth in the direction of arrow F, as shown in FIGS. The dirt 51 and the like remaining in the nozzle 18 are divided into
Remove. In addition, by supplying air and water from the nozzle 18, the dirt 51 in the nozzle 18 is removed to the outside.

Since the removing member 50 has such a shape that the distal end side is narrowed, the removing member 50 has an effect that it can be easily inserted into the nozzle 18 and the clogging inside the nozzle 18 can be easily released. Because it is composed of elastic members,
The lens surfaces such as the illumination lens 13 and the objective lens 14 are not damaged.

By removing irregularities or cuts on the surface of the removing member 50 and roughening the surface of the removing member 50, the effect of removing dirt can be further improved.

[0175]

As described above, the engaging portion of the jig for removing the distal end cover member from the distal end of the endoscope is provided on the outer peripheral surface of the insertion portion of the endoscope, and this engaging portion has a smooth corner portion. Because it is formed in a concave shape connected by a curved surface, the tip cover member can be easily removed from the end of the endoscope using a jig, and it becomes difficult for dirt such as bodily fluids to accumulate in the engagement part, For example, even if filth accumulates, it can be easily washed and removed, so that the cleaning work is reduced and the working efficiency can be improved.

[Brief description of the drawings]

FIG. 1 is a side view of an endoscope according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view of the endoscope showing the same embodiment.

FIG. 3 is an exemplary perspective view of the endoscope according to the embodiment;

FIG. 4 is an exemplary perspective view showing a state in which the distal end cover member of the embodiment is withdrawn;

FIG. 5 is a perspective view showing the jig of the embodiment.

FIG. 6 is a perspective view showing a use state of the jig shown in FIG. 5;

FIG. 7 is a perspective view of the endoscope showing an engaged state of the jig shown in FIG. 5;

FIG. 8 is a perspective view of the endoscope showing a state in which the distal end cover member is pulled out by the jig shown in FIG. 5;

FIG. 9 is a perspective view showing an engagement state of the jig shown in FIG. 5 with front end cover members having different diameters.

FIG. 10 is a perspective view of an endoscope showing a second embodiment of the present invention.

FIG. 11 is a perspective view of an endoscope showing a third embodiment of the present invention.

FIG. 12 is a perspective view of an endoscope showing a modification of the first to third embodiments of the present invention.

FIG. 13 is a perspective view of a jig showing a modification of the first to third embodiments of the present invention.

FIG. 14 is a perspective view showing a first disclosed example of the endoscope.

FIG. 15 is a diagram showing a structure of an engaging portion and a jig according to the first disclosure example shown in FIG. 14;

FIG. 16 is a view showing a state in which a jig is fitted into the engaging portion of the first disclosure example shown in FIG. 14;

FIG. 17 is a diagram showing an engaged state of the first disclosure example shown in FIG. 14;

FIG. 18 is a perspective view of the endoscope showing a state in which the distal end cover member of the first disclosure example shown in FIG. 14 is removed.

FIG. 19 is a diagram illustrating an engagement state of a jig with engagement portions having different sizes according to the first disclosure example illustrated in FIG. 14;

FIG. 20 is a perspective view showing a second disclosed example of the endoscope.

FIG. 21 is a perspective view of the endoscope showing a state in which the distal end cover member of the second disclosure example shown in FIG. 20 is removed.

FIG. 22 is a diagram showing a process of engaging the jig of the second disclosure example shown in FIG. 20;

FIG. 23 is a diagram showing a modification of the engaging portion according to the first and second disclosed examples.

FIG. 24 is a sectional view showing a third disclosure example of the endoscope.

FIG. 25 is a side view of a jig used in the third disclosure example shown in FIG. 24;

FIG. 26 is a sectional view of the endoscope showing a state in which the distal end cover member of the third disclosure example shown in FIG. 24 is removed.

FIG. 27 is a view showing a modification of the jig shown in FIG. 25;

FIG. 28 is a sectional view of an endoscope showing a modification of the third disclosure example shown in FIG. 24;

FIG. 29 is a cross-sectional view of an endoscope showing a modification of the third disclosure example shown in FIG. 24;

FIG. 30 is a perspective view showing a removing member for removing dirt from the nozzle of the endoscope.

FIG. 31 is a diagram illustrating a use state of the removing member illustrated in FIG. 30;

FIG. 32 is a diagram showing a process of removing dirt by the removing member shown in FIG. 30;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Endoscope 3 ... Insert part 6 ... Tip part 10 ... Tip component part 16 ... Tip cover member 16a ... End surface (engagement part) 17 ... Air supply / water supply port (fluid conduit) 18 ... Nozzle 19 ... Notch part (Engagement part) 23 ... jig 49 ... curved surface

Claims (1)

[Claims] 1. An insertion part which is inserted into a body cavity, is detachable from a tip part provided at a tip of the insertion part, and is inserted into the insertion part and communicates with a fluid conduit opened to the tip part. In an endoscope having a distal end cover member having a nozzle formed therein, an engaging portion for engaging a jig for removing the distal end cover member is provided on an outer peripheral surface of a distal end of the insertion portion in a concave shape. An endoscope, wherein a corner of the joint is formed by a concave surface connected by a smooth curved surface.