JP2003167202A - Rigid sheath for endoscope - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rigid sheath for an endoscope with which observation can be made without projecting the distal end of the endoscope having an optical system from the distal end opening of a rigid sleeve to be inserted with flexible insertion portions of the direct-viewing or side-viewing endoscope. <P>SOLUTION: The rigid sleeve 6 is formed of an elongated sleeve body 11 and a large-diameter fixing portion 2 of the diameter greater than the diameter of the sleeve body forming the base end of the rigid sleeve 6. An aperture 13 which is set slightly greater in inner diameter dimensions than the external diameters of the insertion portions 2 and 4 and are formed by prescribed fits is formed in the central axial direction of the sleeve body. A notched window 14 communicatively connected with the aperture 13 is formed on the distal end side flank of the sleeve body 11. A projecting part 16 projected by a prescribed height (h) from the inner peripheral surface is disposed near the distal end opening 15. This projecting part 16 is so formed that the distal end faces of the forward-viewing endoscope 3 and the side-viewing endoscope 5 touch the same. The projecting part is so formed that its height (h) does not hinder the visual field range of observation and exit range of illumination light of the direct-viewing endoscope 3. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hard sheath for an endoscope having a hard sleeve into which a soft insertion portion of the endoscope is inserted.

[0002]

2. Description of the Related Art Endoscopes include industrial endoscope devices used not only for medical purposes but also for industrial purposes such as observation and inspection of plant piping and jet engines.
A hard sheath for an endoscope that allows the endoscope having the soft insertion portion to be used as a rigid endoscope by inserting and arranging the soft insertion portion in the industrial endoscope device. (Hereinafter, abbreviated as a hard sheath) is provided.

A conventional rigid sheath is, for example, USP5.
There is a hard sheath shown in US Pat. No. 2,618,88 and US Pat. No. 3,690,775, and this hard sheath is composed of a hard sleeve that guides the insertion portion to an observation target site and a grip portion that the user grips. The hard sheath has a structure in which the insertion portion inserted into the hard sleeve can be projected from the sleeve tip opening.

Therefore, even when a side-view type endoscope having a flexible insertion portion is inserted into the rigid sleeve, the observation optical system and the illumination optical system provided at the distal end portion of the endoscope are connected to the distal end of the rigid sleeve. Side projection can be performed by projecting from the opening.

Further, Japanese Patent Laid-Open No. 11-99120 discloses a rigid sheath for an endoscope in which an objective optical system can be arranged at the tip of a rigid sleeve. In this endoscope rigid sheath, the insertion portion can be used as a direct-viewing type rigid endoscope by arranging a flexible direct-viewing type endoscope, and in the state where the objective optical system is arranged. By attaching a direct-viewing endoscope to the rigid sheath for endoscope, it was possible to use it as a side-viewing rigid endoscope.

[0006]

However, the above-mentioned U
With the rigid sheaths of SP5261888 and USP3690775, if the tip of the endoscope is protruding from the tip opening of this rigid sleeve, when the tip accidentally hits the subject, There is a risk that the optical system and the like in the tip portion of the endoscope may be damaged.

Further, in the rigid sleeve disclosed in Japanese Patent Laid-Open No. 11-99120, inspection can be performed without the tip of the endoscope to be assembled protruding from the tip opening of the rigid sleeve. It is limited to the ones.

The present invention has been made in view of the above circumstances, and an endoscope tip having an optical system is provided from a tip opening of a rigid sleeve through which a soft insertion portion of a direct-view type or side-view type endoscope is inserted. It is an object of the present invention to provide a rigid sheath for an endoscope that enables observation without protruding the portion.

[0009]

A rigid sheath for an endoscope according to the present invention comprises an elongated tubular rigid sleeve having a through hole into which a soft insertion portion of a direct-viewing or side-viewing endoscope is inserted. A rigid sheath for an endoscope, wherein the rigid sleeve comprises
At least one convex portion that is provided in the vicinity of the distal end opening and that projects from the inner peripheral surface and comes into contact with the distal end surface of the endoscope, and the optical system of the inserted side-viewing endoscope formed on the side surface on the distal end side. And a cutout window facing each other.

Further, there is provided a rigid endoscope sheath having an elongated tubular rigid sleeve having a through hole into which a soft insertion portion of a direct-viewing type or side-viewing type endoscope is inserted, the rigid sleeve comprising: An elongated tubular sleeve main body having a notched window facing the optical system of the side-viewing endoscope on the side surface on the distal end side, and the sleeve main body attached to the distal end of the sleeve main body and projecting from the inner peripheral surface. At least 1 with which the distal end surface of the endoscope abuts
And an annular positioning member provided with two convex portions.

The convex portion and the cutout window are formed in a predetermined shape at positions that do not interfere with the observation field range and the illumination light emission range of the respective endoscopes.

According to these structures, when the flexible sleeve of the direct-viewing type or side-viewing type endoscope is inserted into the rigid sleeve, the distal end surface of the endoscope comes into contact with the convex portion and The mirror tip is positioned in place within the rigid sleeve. Then, in this state, direct-viewing or side-viewing can be favorably performed.
In addition, even if the tip of the endoscope is accidentally hit or dropped on the subject during use, the impact is reduced by the hard sleeve that covers the tip, and the optics Protects the system from shock.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. 1 to 7 relate to a first embodiment of the present invention, FIG. 1 is an explanatory view showing an endoscope apparatus having a rigid sheath for an endoscope, and FIG. 2 describes a component structure of a rigid sheath for an endoscope. FIG. 3 is a diagram for explaining the rigid sleeve,
FIG. 4 is a view for explaining a rigid sheath for an endoscope in an assembled state,
5 is a diagram showing a state in which a direct-viewing endoscope is inserted and arranged in a rigid sleeve, FIG. 6 is a diagram showing a state in which a side-viewing endoscope is inserted and arranged in a rigid sleeve, and FIG. 7 is another tip side of the rigid sleeve. It is a figure explaining a structure. 3 (a) is a perspective view of the tip opening side, FIG. 3 (b) is a longitudinal sectional view, FIG. 7 (a) is a view showing a constituent sleeve having an inclined surface, and FIG. 7 (b) is a notch. FIG. 7 is a view showing a constituent sleeve in which the rising surface on the tip side of the window is aligned with the inner side surface of the convex portion, and FIG. 7C is a view showing a constituent sleeve in which the convex portion is provided on the entire inner peripheral surface.

As shown in FIG. 1, the endoscope apparatus 1 according to the present embodiment includes a direct-view endoscope 3 having a flexible insertion portion 2 and an insertion portion 4.
Is a flexible side-viewing endoscope 5, and an endoscope hardness having a rigid sleeve 6 having a through-hole, which will be described later, into which the insertion portions 2 and 4 of the endoscopes 3 and 5 are inserted and arranged. It is composed of a sheath 10.

The insertion portions 2 and 4 of the direct-viewing endoscope 3 and the side-viewing endoscope 5 are connected to the distal end portions 2a and 4a, which incorporate the observation optical system and the illumination optical system, and the distal end portions 2a and 4a. A bending portion 2 constituted by connecting bending pieces (not shown), which bends the tip portions 2a and 4a in a desired direction.
b and 4b, and flexible flexible elongated tube portions 2c and 4c connected to the curved portions 2b and 4b.
Reference numeral 5a is an illumination window and reference numeral 5b is an observation window.

As shown in FIG. 2, the rigid sheath 10 for an endoscope is screwed to the rigid sleeve 6, a pipe-shaped grip portion main body 7 constituting a grip portion, and a tip portion of the grip portion main body 7. The sleeve fixing member 8 is formed with a male screw 8a to be fixed, and the endoscope guide member 9 is formed with a male screw 9a to be screwed and fixed to the base end portion of the grip body 7.

As shown in FIGS. 2 and 3 (a) and 3 (b), the rigid sleeve 6 includes an elongated sleeve body 11 and the sleeve body 11 which constitutes a base end portion of the rigid sleeve 6.
And a larger diameter fixing portion 12 having a larger diameter, and a hole portion 13 formed by a predetermined fit in which the inner diameter dimension is set slightly larger than the maximum outer diameter of the insertion portions 2 and 4 in the central axial direction.
Is provided.

A notched window 14 communicating with the hole 13 is formed on the side surface of the sleeve body 11 on the tip end side, and a predetermined height (h) from the inner peripheral surface near the tip opening 15 is formed.
For example, four projecting portions 16 are provided so as to protrude only.
The convex portion 16 is formed at a predetermined position of the tip opening 15 by machining such as cutting or electric discharge machining or bending.

As shown in FIGS. 2 and 4, an insertion portion arranging hole 21 through which the insertion portions 2 and 4 are inserted is formed in the central axis direction of the grip portion main body 7. This insertion portion placement hole 21
Stepped recesses 22 and 23 are formed at both ends of the. On the inner peripheral surfaces of the large-diameter holes 22a, 23a of the stepped recesses 22, 23, a male screw 8a of the sleeve fixing member 8 and a female screw 7a with which the male screw 9a of the endoscope guide member 9 is respectively screwed,
7b is provided.

The small diameter hole 23b of the stepped recess 23
Is configured as an arrangement space portion for arranging the O-ring 24, and the small diameter hole 22b of the stepped recess 22 is formed as an arrangement space portion in which a sleeve pressing portion of the sleeve fixing member 8 described later is arranged. . A protrusion 25 is formed between the small diameter hole 23b and the large diameter hole 23 to prevent the O-ring 24 arranged in the small diameter hole 23b from falling off.

The sleeve fixing member 8 has a large diameter portion 31 having a large diameter and forming the leading end side of the grip portion, a male screw portion 32 having the male screw 8a formed therein, and the small diameter hole 22.
and a sleeve pressing portion 33 arranged in b. In the central axis direction of the sleeve fixing member 8, there is formed a main body insertion hole 34 into which the sleeve main body 11 of the hard sleeve 6 is inserted, the main body insertion hole 34 having a diameter slightly larger than that of the sleeve main body 11.

Further, the endoscope guide member 9 has a large-diameter portion 41 on the base end side which has a large diameter and constitutes the base end side of the grip portion, a male screw portion 42 on which the male screw 9a is formed, and Small hole 23
and a ring pressing portion 43 which is arranged in b and presses the O-ring 24. In the central axis direction of the endoscope guide member 9, the insertion portions 2 and 4 are loosely fitted and inserted, and an insertion portion guide hole 44 having a diameter larger than those of the insertion portions 2 and 4 is formed. ing.

Specifically, an insertion portion guide port 44a provided with, for example, a curved surface guide portion for smoothly guiding the insertion portions 2 and 4 is formed at the proximal end side of the insertion portion guide hole 44, and the distal end thereof is formed. On the side, the insertion portions 2 and 4 are provided with the insertion portion placement hole 2
An insertion portion introducing portion 44b formed by, for example, a tapered surface or the like for smoothly guiding to 1 is formed.

Therefore, the rigid sleeve 6 is integrally screwed and fixed to the grip portion main body 7 through the sleeve fixing member 8, and the endoscope guide member 9 is integrally screwed and fixed to the grip portion main body 7. By doing so, the rigid sheath 10 for an endoscope is configured as shown in FIG.

When the rigid sleeve 6 is integrally fixed to the grip body 7, the large-diameter fixing portion 12 of the hard sleeve 6 is placed in the small-diameter hole 22b of the stepped recess 22, and then the sleeve body is fixed. The sleeve fixing member 8 is inserted from the front end side of 11 and the male screw 8a of the sleeve fixing member 8 is inserted.
Is screwed into the female screw 7a of the grip body 7. As a result, the large-diameter fixing portion 12 of the sleeve main body 11 is pressed by the sleeve pressing portion 33 of the sleeve fixing member 8 and is integrally fixed to the gripping portion main body 7.

When the endoscope guide member 9 is integrally screwed and fixed to the grip body 7, the ring pressing portion 43 of the endoscope guide member 9 is in contact with the O-ring 24, that is, The state before pressing the O-ring 24 is set.

The protrusion 16 and the cutout window 14 of the rigid sleeve 6 will be described with reference to FIGS. 5 and 6. The convex portion 16 of the rigid sleeve 6 is arranged so that the distal end surfaces of the direct-viewing endoscope 3 and the side-viewing endoscope 5 come into contact with each other, and the observation visual field range and the illumination light emitting range of the direct-viewing endoscope 3 are set. It is formed in a predetermined shape at a height (h) and a position where it does not interfere. That is, the convex portion 16 includes the distal end portions 2 a, 4 of the endoscopes 3, 5.
It serves as a positioning portion for preventing a from being exposed from the rigid sleeve 6 and for arranging the endoscopes 3 and 5 at predetermined positions in the rigid sleeve 6.

Therefore, by observing through the tip opening 15 in this arrangement position, the illumination light is emitted toward the observation site without being blocked by the convex portion 16 and the observation site illuminated by the illumination light. Can be observed without being blocked by the convex portion 16.

When the insertion portion 2 of the direct-viewing endoscope 3 is inserted into the rigid sleeve 6 and the tip surface of the tip portion 2a of the insertion portion 2 comes into contact with the convex portion 16, the endoscope is By further screwing the guide member 9 to the grip body 7 side,
The ring pressing portion 43 of the endoscope guide member 9 is the O-ring 2
Press 4. Then, the O-ring 24 expands toward the center, and the insertion portion 2 is integrally fixed to the endoscope rigid sheath 10. The endoscope guide member 9 may be made of a material having excellent slipperiness such as polyacetal so as to press the O-ring 24 without damaging the O-ring 24.

On the other hand, the cutout window 1 of the rigid sleeve 6
Reference numeral 4 denotes an observation field range and illumination of the side-view endoscope 5 when the tip surface of the tip section 2a of the side-view endoscope 5 is in contact with the convex portion 16 and positioned and arranged at a predetermined position. It is formed in a size and shape that does not interfere with the light emission range.

Therefore, in this arrangement, the cutout window 1
By observing through 4, the illumination light is emitted toward the observation site without being blocked by the periphery of the cutout window 14, and the observation site illuminated by the illumination light is observed around the cutout window 14. It can be done without being blocked by.

The insertion portion 4 of the side-view endoscope 5 is also integrally fixed to the endoscope hard sheath 10 by an O-ring 24.

As described above, by providing the convex portion at a predetermined position near the tip opening of the rigid sleeve, it is possible to reliably prevent the direct-viewing endoscope and the side-viewing endoscope from being exposed from the rigid sleeve. can do.

Further, since the convex portion provided on the rigid sleeve is provided in a shape and at a position that does not obstruct the observation visual field range and the illumination light emission range of the direct-viewing endoscope, the direct-viewing endoscope is brought into contact with the convex section. In this state, good direct observation can be performed.

Furthermore, when the side-viewing endoscope is in contact with the convex portion on the side portion of the rigid sleeve, the shape and size are such that they do not interfere with the observation field range and illumination light emission range of the side-viewing endoscope. By providing the cutout window, it is possible to perform good side-view observation in a state where the side-view endoscope is in contact with the convex portion.

As a result, when the direct or side-viewing endoscope is placed and observed in the rigid sheath for an endoscope, the distal end portion of the insertion portion is directly hit against the subject and the inside of the distal end portion is hit. Problems that damage the optical system, etc. are alleviated.

Incidentally, the rigid sheath 1 for endoscope of the present embodiment.
In No. 0, by preparing the rigid sleeve 6 according to the type of endoscope, a rigid sheath for an endoscope that is compatible with a plurality of types of endoscopes is configured. That is, by preparing a rigid sleeve having lengths, hole diameter dimensions, convex portions, and cutout windows, which correspond to endoscopes having different specifications such as length and diameter dimensions of the insertion portion, This can be achieved by selectively assembling a corresponding rigid sleeve to the grip body. As a special example, it can be said that even an endoscope having both a direct-viewing function and a side-viewing function can be handled by preparing a rigid sleeve corresponding thereto.

Further, as shown in FIG. 7A, an inclined surface 17 is formed on the rising surface forming the convex portion 16 and the cutout window 14.
Alternatively, as shown in FIG. 7B, the rising surface on the tip end side of the cutout window 14 and the inner surface of the convex portion 16 may be aligned with each other.

Further, the number of the convex portions is not limited to four, and may be less or more than four, and as shown in FIG. The tip opening 15a may be formed on the entire inner peripheral surface as long as the emission range is not obstructed, that is, the tip opening 15a is formed with a diameter smaller than the above 13 by a predetermined height dimension.

8 to 12 relate to the second embodiment of the present invention, FIG. 8 is a view for explaining the structure of a rigid sleeve composed of a sleeve body and an annular positioning member, and FIG. 9 is a sleeve body and an annular positioning member. And FIG. 10 is a diagram for explaining another configuration of the hard sleeve configured by the above, FIG. 10 is a diagram for explaining another configuration of the hard sleeve configured by the sleeve body and the annular positioning member, and FIG. 11 is a diagram illustrating the sleeve body and the annular positioning member. FIG. 12 is a diagram illustrating still another configuration of the configured hard sleeve, and FIG. 12 is a diagram illustrating the configuration of the hard sleeve provided with a separate convex portion.

FIG. 8 (a) is a structural diagram of the hard sleeve, and FIG. 8 (b) is a diagram showing the hard sleeve in an assembled state.
9A is a configuration diagram of the hard sleeve, FIG. 9B is a diagram showing the hard sleeve in an assembled state, FIG. 12A is a configuration diagram of the hard sleeve, and FIG. 12B is a hard sleeve in the assembled state. FIG.

As shown in FIG. 8A, in the present embodiment, a rigid sleeve 6A is provided with an elongated tubular sleeve body 18 in which a cutout window 14 is formed, and this sleeve body 18
And an annular positioning member 19 provided with a convex portion 16 attached to the tip end of the annular positioning member 19, and the annular positioning member 19 is press-fitted into the sleeve body 18 or integrally fixed by adhesion as shown in FIG. 8B. The rigid sleeve 6A is formed. Other configurations are the same as those in the first embodiment, and the same members are designated by the same reference numerals and the description thereof will be omitted.

As described above, by constructing the constituent sleeve with the sleeve body and the annular positioning member, it is possible to provide a low cost rigid sheath for an endoscope with greatly improved workability. Other actions and effects are similar to those of the above-described embodiment. Although the annular positioning member 19 is fixed to the sleeve body 18 by press fitting or adhesion in the above-described embodiment, the fixing pin 51 is prepared as shown in FIG. The fixing pin 51 is formed with through holes 51a and 51b into which the fixing pin 51 is press-fitted or engaged.
Alternatively, the rigid sleeve 6A may be integrally fixed by the method described above.

As shown in FIG. 10, screws 52 are prepared instead of the fixing pins 51, while the annular positioning member 1 is used.
The escape hole 52a may be formed in 9b, the female threaded portion 52b may be formed in the sleeve body 18b, and the rigid sleeve 6A may be integrally fixed by the screw 52. As a result, a stronger fixation can be achieved.

Further, as shown in FIG.
It is also possible to provide a pin disengagement prevention portion 53 made of an adhesive or an elastic member on the outer peripheral side surface of to prevent the fixing pin 51 from falling off. As a result, a more reliable fixed state is achieved. At this time, the adhesive and the elastic member are prevented from protruding from the outer peripheral surface of the rigid sleeve 6A.

Further, as shown in FIG. 12, the pin member 55 forming the convex portion is formed separately from the sleeve body (or an annular positioning member (not shown)) 18d, and the pin member 55 is adhered or press-fitted. Alternatively, the convex portion 16 may be provided by being fixed at a predetermined position.

In the above-described embodiment, when the side-viewing endoscope 5 is inserted into the rigid sleeve 6 of the endoscope hard sheath 10, the illumination light of the side-viewing endoscope 5 is emitted to the cutout window 14. The user has adjusted the range and the viewing field range to be positioned. At this time, the user confirms by visually or observing an image displayed on the screen of the monitor. Therefore, there has been a demand for a configuration in which the side-view endoscope 5 can be easily positioned with respect to the rigid sleeve 6.

13 to 15 relate to a mounting structure of a side-viewing endoscope to a rigid sleeve, FIG. 13 is a view for explaining an example of the constitution of the side-viewing endoscope and the rigid sleeve, and FIG. 14 is a side-viewing endoscope. The figure explaining the other structural examples of an endoscope and a rigid sleeve,
FIG. 15: is a figure explaining another structural example of a side view endoscope and a rigid sleeve.

Incidentally, FIG. 13 (a) is a diagram for explaining the specific construction of the side-viewing endoscope and the rigid sleeve, and FIG. 13 (b) is a diagram showing the side-viewing endoscope and the rigid sleeve in the mounted state. ,
FIG. 15A is a diagram illustrating another specific configuration of the side-view endoscope and the rigid sleeve, and FIG. 15B is a diagram illustrating the side-view endoscope and the rigid sleeve in an attached state.

As shown in FIG. 13 (a), in this embodiment, a notched recess 5c is provided at a predetermined position of the tip portion 4a of the side-viewing endoscope 5. On the other hand, on the inner peripheral surface of the sleeve body 11 of the rigid sleeve 6 in the vicinity of the front end opening, the convex portion 1 is fitted in the cutout concave portion 5c of the side-viewing endoscope 5.
A positioning projection 16a that also serves as 6 is provided.

Therefore, as shown in FIG. 13B, when the side-view endoscope 5 is assembled to the rigid sleeve 6 with the cutout recess 5c and the positioning protrusion 16a fitted to each other, the side-view endoscope The mirror 5 is placed in a proper position with respect to the rigid sleeve 6. In addition, the user can use the notch recess 5
It is possible to determine that the side-viewing endoscope 5 and the rigid sleeve 6 are properly positioned by the feeling when the c and the positioning protrusion 16a are fitted together.

The cutout concave portion 5c and the positioning convex portion 16a are formed, and the side-view endoscope 5 and the rigid sleeve 6 are formed.
Instead of setting the positional relationship with the appropriate state, the stepped surface of the side-viewing endoscope 5 protruding toward the inner peripheral side at the base end portion of the cutout window 14 of the rigid sleeve 6 as shown in FIG. 5d
You may make it form the positioning window part 14a which contacts.

As a result, the step surface 5d of the side-view endoscope 5 is brought into contact with the positioning window portion 14a, and the side-view endoscope 5 is moved.
It can be determined that the positioning of the hard sleeve 6 and the rigid sleeve 6 is proper. The notch recess 5c, the positioning protrusion 16a, and the positioning window 14a are formed by machining such as cutting or electric discharge machining, or bending.

Further, as shown in FIGS. 15 (a) and 15 (b), in the present embodiment, the side surface predetermined position of the insertion portion 4 of the side-viewing endoscope 5 and the sleeve fixing of the endoscope hard sheath 10 are fixed. Index lines 4d and 8b are provided at predetermined positions on the side surface of the member 8, respectively.

On the side surface of the sleeve body 11 of the hard sleeve 6, a convex portion 11a for positioning the sleeve fixing member 8 is provided, a part of which protrudes in the outer peripheral direction.
On the other hand, the sleeve fixing member 8 has the convex portion 1
A concave groove 8c that fits into the la 1a is formed.

The position where the concave groove 8c and the convex portion 11a are formed is the same as the case where the concave portion 8c and the convex portion 11a are fitted to each other and the sleeve fixing member 8 and the grip portion main body 7 are integrated. The center line of the index line 8b and the center line of the cutout window 14 are substantially aligned with each other. On the other hand, in the index line 4d, the illumination window 5a and the observation window 5b are located on an extension of the center line.

As a result, the user positions the index line 8b of the sleeve fixing member 8 and the index line 4d of the insertion portion 4 of the side-view endoscope 5 on a straight line, and the side-view endoscope By arranging 5 in the endoscope rigid sheath 10, the side-viewing endoscope 5 and the rigid sleeve 6 are positioned properly, and the assembly is completed.

By adopting such a structure in which the index is provided, the side view endoscope 5 can be used when the cutout window 14 of the rigid sleeve cannot be visually observed, for example, when the rigid sleeve is inserted in the tube. The rigid sheath for endoscope 1
Can be inserted at 0.

The convex portion is provided integrally with the sleeve body 11 by machining or bending, or fixing another member by adhesion or welding. The present invention is
The present invention is not limited to the embodiments described above, and various modifications can be made without departing from the spirit of the invention.

[Additional Notes] According to the above-described embodiment of the present invention described in detail above, the following configuration can be obtained.

(1) In the endoscope hard sheath provided with the elongated tubular rigid sleeve having the through hole into which the soft insertion portion of the direct-viewing type or side-viewing type endoscope is inserted, the rigid sleeve is At least one convex portion that is provided in the vicinity of the distal end opening and that projects from the inner peripheral surface and comes into contact with the distal end surface of the endoscope, and the optical system of the inserted side-viewing endoscope formed on the side surface on the distal end side. And a notched window facing each other, and a rigid sheath for an endoscope.

(2) In the endoscope hard sheath provided with the elongated tubular rigid sleeve having the through hole into which the soft insertion portion of the direct-viewing or side-viewing endoscope is inserted, the rigid sleeve is An elongated tubular sleeve body having a notched window facing the optical system of the side-viewing endoscope on the side surface on the distal end side, and the sleeve body attached to the distal end portion of the sleeve body and projecting from the inner peripheral surface. At least 1 with which the mirror tip surface abuts
A rigid sheath for an endoscope, comprising: an annular positioning member provided with two convex portions.

(3) The convex portion and the cutout window are formed in a predetermined shape at positions that do not interfere with the observation field range and illumination light emission range of each endoscope.
Alternatively, the rigid sheath for an endoscope according to claim 2.

(4) Note 2 in which the rigid sleeve is constructed by fixing the annular positioning member and the sleeve body with screws.
A rigid sheath for an endoscope as described.

(5) Note 2 in which the rigid sleeve is configured by press-fitting and fixing the annular positioning member and the sleeve body.
A rigid sheath for an endoscope as described.

(6) Note 2 in which the rigid sleeve is configured by adhesively fixing the annular positioning member and the sleeve body.
A rigid sheath for an endoscope as described.

(7) The rigid sheath for an endoscope according to appendix 2, wherein the annular positioning member and the sleeve body are fixed by a pin which is a connecting member to form the rigid sleeve.

(8) The rigid sheath for an endoscope according to appendix 1 or 2, wherein the convex portion is formed integrally with a rigid sleeve or an annular positioning member.

(9) Note 1 or Note 2 in which the convex portion is formed separately from the hard sleeve or the annular positioning member.
The rigid sheath for endoscopes according to.

(10) The rigid sheath for an endoscope according to appendix 9, wherein the separate convex portion is provided on the rigid sleeve or the annular positioning member by adhesion or press fitting.

(11) In a hard sheath for an endoscope having an elongated tubular hard sleeve having a through hole into which a soft insertion portion of the endoscope is inserted and arranged, an inner circumference is provided at a tip opening portion of the hard sleeve. A rigid sheath for an endoscope, wherein at least one convex portion protruding from the surface is provided and a cutout window is provided on the side surface on the distal end side.

[0072]

As described above, according to the present invention, the distal end portion of the endoscope having the optical system is provided from the distal end opening of the rigid sleeve through which the soft insertion portion of the direct-viewing type or side-viewing type endoscope is inserted. It is possible to provide a rigid sheath for an endoscope that allows observation without projecting the needle.

[Brief description of drawings]

FIG. 1 is an explanatory view showing an endoscope apparatus having a rigid sheath for endoscopes.

FIG. 2 is a diagram for explaining a component configuration of a rigid sheath for an endoscope.

FIG. 3 is a diagram illustrating a rigid sleeve.

FIG. 4 is a diagram illustrating a rigid sheath for an endoscope in an assembled state.

FIG. 5 is a view showing a state in which a direct-viewing endoscope is inserted and arranged in a rigid sleeve.

FIG. 6 is a view showing a state in which a side-viewing endoscope is inserted and arranged in a rigid sleeve.

FIG. 7 is a diagram illustrating another configuration of the distal end side of the rigid sleeve.

8 to 12 relate to a second embodiment of the present invention, and FIG. 8 is a view for explaining the configuration of a rigid sleeve including a sleeve body and an annular positioning member.

FIG. 9 is a diagram for explaining another configuration of the hard sleeve including the sleeve body and the annular positioning member.

FIG. 10 is a view for explaining another structure of the hard sleeve composed of the sleeve body and the annular positioning member.

FIG. 11 is a view for explaining still another structure of the hard sleeve including the sleeve body and the annular positioning member.

FIG. 12 is a diagram illustrating a configuration of a hard sleeve provided with a separate convex portion.

13 to 15 relate to a mounting structure of a side-viewing endoscope to a rigid sleeve, and FIG. 13 is a view for explaining a configuration example of a side-viewing endoscope and a rigid sleeve.

FIG. 14 is a diagram illustrating another configuration example of the side-view endoscope and the rigid sleeve.

FIG. 15 is a diagram illustrating another configuration example of the side-view endoscope and the rigid sleeve.

[Explanation of symbols]

6 ... Hard sleeve 10 ... Hard sheath for endoscope 11 ... Sleeve body 14 ... Notched window 15 ... Tip opening 16 ... Convex part

Claims (3)

[Claims] 1. A hard sheath for an endoscope, comprising a slender tubular hard sleeve having a through hole into which a soft insertion portion of a direct-view type or side-view type endoscope is inserted, wherein the hard sleeve has a distal end. At least one convex portion that is provided in the vicinity of the opening and that projects from the inner peripheral surface and is in contact with the distal end surface of the endoscope, and the optical system of the inserted side-viewing endoscope that is formed on the side surface on the distal end side are provided. A rigid sheath for an endoscope, comprising: a notched window facing each other. 2. A rigid sheath for an endoscope, comprising an elongated tubular rigid sleeve having a through hole into which a soft insertion portion of a direct-viewing type or side-viewing type endoscope is inserted, wherein the rigid sleeve has a distal end. An elongated tubular sleeve body having a notched window facing the optical system of the side-viewing endoscope on its side surface, and the endoscope attached to the tip of the sleeve body and protruding from the inner peripheral surface. A rigid sheath for an endoscope, comprising: an annular positioning member provided with at least one convex portion with which the distal end surface abuts. 3. The projection and the cutout window are formed in a predetermined shape in a position that does not interfere with the observation field range and the illumination light emission range of the respective endoscopes. The rigid sheath for endoscopes according to.