JP3394633B2 - Cover-type endoscope - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [0001] BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an endoscope for a cover.
The present invention relates to a cover-type endoscope covered with a cover. [0002] 2. Description of the Related Art In recent years, endoscopes are widely used in the medical field and the like.
Became used. Endoscopy in the medical field
Use a clean endoscope that has been thoroughly cleaned and disinfected prior to testing.
Need to be used. Therefore, when using an endoscope,
After use, wash or sterilize to prevent infectious diseases.
It is necessary to completely sterilize, etc.
Is time-consuming, which may reduce the efficiency of using endoscopes.
Problem. [0003] Therefore, the labor for cleaning and disinfecting the endoscope is reduced.
Endoscope with the cover attached to the endoscope body.
Inspection and after inspection, replace only the cover as disposable
The endoscope itself will not become dirty after use.
The endoscope of the cover method which made the hygiene consideration unnecessary
Proposed. A cover type endoscope is generally an endoscope for a cover.
The insertion part of the main unit must be mounted inside the flexible insertion part cover.
Then, the outer surface of the endoscope insertion portion is covered with the insertion portion cover,
The endoscope body is always kept clean. Therefore,
Insert a cover-type endoscope covered with a sterile cover at the time of use.
Even if the entrance is contaminated, the inside of the cover is separated by the isolation effect of the cover
The mirror insertion part itself is not contaminated and the cover is clean.
By exchanging it, infection to the patient can be prevented. [0005] In such a cover-type endoscope, the endoscope camera is provided.
In use condition with the bar attached, cover inside the endoscope cover.
It is necessary to prevent the bar endoscope from shifting. For example
Japanese Unexamined Patent Publication (Kokai) No. 3-193023 discloses insertion of a cover endoscope.
To insert the insertion part into the endoscope cover and fix them
The front end of the cover to the front end of the insertion section of the endoscope.
A locking means is provided, and the tip of the cover and the tip of the insertion
Inspection is performed with the stage fixed, and after the inspection is completed
Locking means by pinching the cover tip with your fingertip
Release the cover, remove the tip of the insert and the tip of the insertion
Cover type that removes the endoscope cover from the endoscope
An endoscope is disclosed. [0006] Similarly, Japanese Utility Model Laid-Open No. 3-101901
Just press the top of the cover and press
Insert the locking projection provided at the tip of the cover that fixed the tip
The engagement of the locking groove provided at the tip of the part can be released, and the cover
Disclosure of removable endoscope cover from mirror
Have been. [0007] Problems to be Solved by the Invention
The prior art disclosed in Japanese Patent Application Publication No. 3 (1999) -1995 discloses a distal end of an endoscope provided at the distal end of an insertion portion.
Of the sheath covering the insertion part so that it is locked to the body of the part
The tip cover provided at the end has locking means,
This locking means is released only by pressing the tip cover.
U. Therefore, when using the endoscope of this publication in a body cavity,
If used in the lower digestive tract, insert the endoscope
Abutting the tip of the endoscope on the intestinal wall
Pressure on the endoscope tip due to bowel movements
If a force is applied to the tip of the endoscope,
If force is applied to the distal end of the endoscope due to
The stopper is released, and the insertion part cover covers the insertion part
There was a risk of becoming unobservable at worst. [0008] Further, Japanese Utility Model Laid-Open No. 3-101701 discloses a technique.
Press the endoscope cover tip in the same manner in the conventional example shown.
The rigidity of the endoscope cover tip and the hardness of the endoscope tip
Japanese Patent Application Laid-Open No. H3-1930
There is a possibility of falling into the same danger as in the publication No. 23. In the above-mentioned cover type endoscope,
Generally, variations in dimensions such as component tolerances occur, so
Ensure that the cover end and the endoscope end are firmly
Is difficult to fix and the rattle is as small as possible
It is necessary to manufacture parts and assembly dimensions with high accuracy
Yes, the equipment cost increases. Especially disposable
Endoscope cover that uses only a few times
The cost of the endoscopy will significantly increase the cost of endoscopy
Connect. Due to variations in dimensions of the endoscope cover and the like,
If there is a space between the endoscope optics and the cover tip,
When the endoscope optics and cover are close enough or in close contact
Cannot be maintained in a state, and the observation optical system and illumination optical
Optical defects such as ghosts and flares between the bar
There was a fear of swaying. The present invention has been made in view of the above points.
The end of the cover endoscope and the end of the endoscope cover
It is easy and improper to fix and release the
A cover-type endoscope that does not remove the endoscope cover even when unexpected external force
Its primary purpose is to provide. Also, the distal end of the endoscope for a cover and the endoscope camera are provided.
Make sure that there are no optical defects with the tip of the bar.
To provide a cover-type endoscope that can actually be held
Is a second object. [0013] [Means for Solving the Problems]The present inventionSlender insertion section
An endoscope having at least an insertion portion of the endoscope.
Endoscope cover to cover, the endoscope cover is the
A distal end cover member is fitted to the distal end of the insertion section of the endoscope.
The end of the endoscopeInto shape
Made, saidInclined with respect to the longitudinal direction of the endoscope insertion section
Locking portion having an inclined surface portion, and the tip cover memberInto shape
Done,Before one end is fixed to the body of the tip cover member
The other end of the endoscope extending in the longitudinal direction of the insertion section is elastic.
An elastically deformable portion,SaidElastic deformation partFormed into
WasAn engagement portion having a slope portion engaged with the slope portion of the locking portion;
Joint part and the elastic deformation partThe elastic deformation disposed outside
A slope portion of the engagement portion formed in the shape portion and a tip of the endoscope;
The engagement with the slope of the locking portion formed at the end is maintained.
LikeRegulating means for regulating the deformation of the elastic deformation portion,
Of the regulating meansFormed on the elastically deforming part,
The formed slope portion of the engaging portion and the end portion of the endoscope are shaped.
The engaged state of the engaging portion with the slope portion is released.
SaidA regulation release means for releasing the regulation of the regulation means,With
It is characterized by having. [0014] [0015] [0016] BRIEF DESCRIPTION OF THE DRAWINGS FIG.
Will be explained. (First Embodiment) FIGS. 1 to 10 show a first embodiment of the present invention.
FIG. 1 is a perspective view showing an overall configuration of a cover-type endoscope.
Figures and 2 show the detailed configuration of the distal end of the insertion section of the cover type endoscope.
FIG. 3 is a cross-sectional view taken along line AA of FIG.
4 is a sectional view taken along the line BB of FIG. 3, and FIGS.
Insert or remove from the tip cover member
It is explanatory drawing explaining the state at the time of leaving. The cover type endoscope 1 of the present embodiment is shown in FIG.
The endoscope for cover 2 and the endoscope for cover 2
Combination with endoscope cover 4 covering at least insertion portion 3
It is composed of The endoscope 2 for cover is a base of the elongated insertion portion 3.
An operation section 5 also serving as a grip section is continuously provided on the end side,
A distal end component 6 is provided on the distal end side. Meanwhile, endoscope
The mirror cover 4 is an insertion portion cover that covers the insertion portion 3
7 and an operation unit cover 8 that covers the operation unit 5.
You. The insertion portion cover 7 is attached to the tip of the soft tubular outer skin 9.
A tip cover member 1 which is provided on the end side with the tip component 6
0 is continuously provided, and engages with the operation portion 5 on the base end side of the outer skin 9.
Mouth part 11 for connecting and fixing
You. The operation unit cover 8 is made of a thin and soft member such as chloride.
It is formed of a film member of a polymer material such as vinyl. this
All of these covers are sterilized before use. Next, referring mainly to FIGS.
Of the distal end of the insertion section 3 and the insertion section cover 7 of the endoscope 2
A detailed configuration will be described. FIG. 2 shows the insertion section cover on the insertion section 3.
FIG. 3 shows a state in which the mounting of the mounting member 7 is completed, and FIG.
FIG. 4 is a sectional view taken along line BB of FIG.
FIG. The insertion portion cover 7 is made of cylindrical urethane or salt.
The book is made up of an outer skin 9 made of a thin tube made of vinyl chloride, etc.
The body (cover body) is constituted, and the tip end of the outer skin 9
The front end cover member 10 is provided in an airtight
ing. For example, at one location on the side periphery of the tip cover member 10
Extended the arm to the proximal end side in the longitudinal direction of the insertion portion 3
An elastic deformation portion 12 is provided, and the elastic deformation portion 12
One end serving as a proximal end is fixed to the distal end cover member 10,
With one end serving as a fulcrum, the other end (that is, the rear end)
Elastically deformable or movable in the radial direction
(The elastic deformation portion 12 is the same member as the tip cover member 10.
Or another member different from the tip cover member 10 may be used first.
It may be provided on the end cover member 10 by bonding or the like). The other end of the elastic deformation portion 12 has a radial direction
An inwardly protruding engaging portion 13 is provided, while a cover
Radially outward on the outer peripheral side of the distal end component 6 of the endoscope 2
A protruding locking portion 14 is provided, and as shown in FIG.
Engagement of the locking portion 14 with the locking portion 13 allows the cover to be viewed endlessly.
The distal end of the mirror 2 is positioned and fixed to the distal end of the endoscope cover 4
I can do it. For example, the engaging portion 13 and the locking
The protruding amount of the portion 14 in the radial direction is preferably about 0.3 to 0.5 mm.
No. The outer surface of the elastic deformation portion 12 is covered with a peripheral tip cover.
-An arc shape having the same outer diameter as the outer diameter of the member 10
It is. The locking portion 14 of the distal end component 6 is
A protruding portion that is formed by cutting out the outer peripheral surface of the tip configuration portion 6 and protruding.
And an engaging portion of the tip cover member 10.
13 is a projection projecting from the inner peripheral surface of the tip cover member 10.
From the outermost circumference circle of the tip cover member 10.
It is provided so as to be convex inward. Outside the elastic deformation portion 12, this elastic deformation
A part of the part 12 and an outer cover
And a restricting means (or a restricting means for restricting the deformation of the elastic deformation portion 12)
A cylindrical member 15 having a function as a regulating member is provided.
Have been. Between the outside of the elastic deformation portion 12 and the outer skin 9,
A space corresponding to the thickness of the cylindrical member 15 is formed. Toes
And the proximal end side of the distal end cover member 10 is more circular than the distal end side.
The diameter is reduced by the thickness of the cylindrical member 15,
The cylindrical member 15 is housed in the space thus formed.
ing. The cylindrical member 15 is a thin metal pipe.
And the diameter of the outermost circumference circle of the tip end cover member 10.
Has the same or smaller outer diameter than the diameter of the outermost circle
You. The cylindrical member 15 applies a force so as to be pinched by a finger.
The material and the thickness are such that it can be deformed when it is obtained. This place
In this case, the thickness of the cylindrical member 15 is, for example, 0.15 to 0.25.
mm is good. The cylindrical member 15 applies a force from outside.
When applied, it deforms and when applied is stopped (not applied), a circle
It is composed of an elastic member having elasticity returning to a cylindrical shape.
You. The engaging portion 13 and the locking portion 14 are provided on both sides.
Easy contact and engagement even if dimensional differences such as product tolerances occur.
The surfaces on which the engaging portions 13 and the locking portions 14 are engaged are inclined with respect to each other.
Slopes 13a and 14a are formed, and there is a dimensional difference.
Even if the error occurs, the engaging part 13 and the locking part 14
It is constituted so that it may shift in the direction which fits. That is, the locking portion 1 protruding radially outward.
4, the proximal end side of the insertion portion protrudes toward the proximal end.
The inclined surface 14a or the tapered surface is shaped so that the output is small.
Front of the engaging portion 13 which is formed and protrudes radially inward.
A distal end is provided on the distal end side of the insertion portion engaged with the locking portion 14.
As the tip cover member 10 protrudes,
An inclined surface 13a or a tapered surface is formed. The locking portion 14 is closer to the inclined surface 14a.
The lower end side stores the engaging portion 13 with respect to the engaging portion 13.
Recess is formed. In addition, the engagement portion 13
The distal end side of the inclined surface 13a of the
As shown in the figure, a concave portion for accommodating the locking portion 14 is formed.
As shown in FIG. 2, the two inclined surfaces 13a and 14a are brought into contact with each other and engaged.
The part 13 and the locking part 14 can be locked or fixed.
ing. The angle of inclination of the slopes 13a, 14a is, for example, 3
0 ° to 45 ° is good. Further, the locking portion 14 is far from the insertion portion distal end side.
So that the outer diameter of the distal end component 6 becomes smaller as it comes to the lower end.
An inclined surface 14b is formed. Also, the elastic deformation portion 12
The outer peripheral surface on the proximal end side of the
An inclined surface 12a having a small outer diameter 12 is formed. Further, as shown in FIG.
The distal end portion of the cover endoscope 2 is provided on the inner peripheral surface on the distal end side of the cover.
Thick to fit with the outer peripheral surface near the tip of 6, and to support the tip side
A support portion 16 is formed, a portion of which protrudes radially inward.
ing. Then, as shown in FIG.
In a state in which the end configuration portion 6 is engaged, the two closely contact each other.
That can be prevented. As shown in FIG.
Is the objective optical system that forms the observation subject image from the tip side
(Or observation optical system) 18 (the first lens at the tip
17), an illustration of converting the subject image into an electric signal
Imaging unit with built-in solid-state imaging device such as CCD
28, image processing of the image signal from the imaging unit 28
To an image control unit (not shown)
A signal cable 29 is provided, and the objective optical system 18 is provided.
Illumination light is transmitted from a light source device (not shown) almost parallel to the optical axis of
Light guide 52 and the transmitted illumination light to the subject
An illumination optical system 53 for irradiation is provided. Tip cover
The first lens of the objective optical system 18 is provided on the distal end surface of the member 10.
These optical systems cover the lens 17 and the illumination optical system 53.
And a lens cover 19 is provided. The lens cover 19 has an objective optical system 18.
To separate the first lens 17 from the illumination optical system 53
A light-shielding portion 54 for shielding light is provided, and an illumination optical system 53 is provided.
Leakage of the illumination light emitted from the
The light is shielded by the light shielding portion 54 to prevent the occurrence of flare. What
In addition, as shown in FIG.
Air supply tube 25 forming a pipe, forming a water supply pipe
Water supply tube 26, a forceps insertion channel forming a forceps insertion passage
A channel tube 27 is provided. Also, in this embodiment, the deformation of the elastic
The cylindrical member 15 as a regulating member for regulating the shape is deformed.
The restriction release mechanism that releases the restriction by
It is formed as follows. For example, as shown in FIG.
10 has a first member for deforming the cylindrical member 15 inward.
For example, two notches 50 for forming a space are formed in an arc shape.
Has been established. This notch 50 is
The position of the elastic deformation part 12 is rotated by about 90 ° with respect to the center axis.
It is provided at two opposing locations at such positions. The notch 50 is the outer peripheral surface of the tip cover member 10.
As shown in Fig. 3 so that the cross section becomes elliptical.
Thereby, the inner peripheral surface of the cylindrical member 15 which is usually cylindrical
And an arc between the outer peripheral surface of the elliptical tip cover member 10
(Notches 50) are provided so as to form
You. Then, for example, in the mounting state of FIG.
Pick up the outer skin 9 with your fingers from the direction of BB.
The cylindrical member 15 is flattened inward toward the notch 50 of FIG.
To remove the space created by the notch 50
(2) The cylindrical member 15 is formed such that its inner peripheral surface is
When it is deformed so as to contact the outer peripheral surface of the ellipse of
Is at least the outer periphery of the elastic deformation portion 12 as shown in FIG.
The elastic deformation portion 12 is deformed radially outward on the surface side
This creates a space 51 in which the elasticity is increased.
A configuration capable of elastically deforming the deformable portion 12
And a restriction release mechanism for releasing the restriction. In other words, for example, in the direction of BB in FIG.
Applying a pinching force with a finger to the outer skin 9 to move the cylindrical member 15 inside
When deformed into an elliptical shape flattened to the side,
FIG. 6 shows a portion of the material 15 in the direction of the major axis of the ellipse.
As shown in FIG.
A new position on the material 10 that is symmetric with the elastic deformation
The configuration is such that the space 51 can be created.
You. Then, the cover for the endoscope cover 4 is provided.
By performing the operation of pulling the endoscope 2 side, the locking portion 14
The engaging portion 13 of the locked elastic deformation portion 12 is moved radially outward.
Of the endoscope cover
ー 4 and the endoscope for cover 2 can be removed.
ing. Restriction release machine when removing from the mounted state of FIG.
I explained the function of the structure, but when installing it as described later
Also applies. As can be seen from this description, the size of the space 51
That is, at least the elastic deformation portion 12 is deformed and the engagement portion 13
And a size enough to release the engagement between the
When the cylindrical member 15 is deformed, the notch 50
The size of the gap creates a gap, and the cross-sectional shape of the notch 50 is
Cylindrical member 15 when cylindrical member 15 is deformed into an elliptical shape
The same shape as the elliptical shape of the inner peripheral surface, or the cylindrical member 15
Flat with a shorter minor axis than the shape when deformed into an ellipse
A good elliptical shape is good. For example, the engaging portion 13 and the locking portion 1
Notch when the radial protrusion amount of No. 4 is 0.3 to 0.5 mm
The largest part of the radial width of 50 is at least 0.3
mm or more is required. As shown in FIG. 2, the front end cover member 10
As the positioning of the cylindrical member 15 on the proximal end side, for example,
Retaining portion 55 formed by a projection protruding radially outward
Is provided on the proximal end side of the cylindrical member 15 and has a distal end
As a positioning to the side, for example, a stop with an enlarged diameter
A female part 56 is provided on the distal end side. In addition, the elasticity
FIG. 4 shows that the deforming portion 12 is smoothly deformed.
As shown in FIG.
A space is provided between the skins 10. Next, the operation of this embodiment will be described with reference to FIGS.
Description will be made with reference to 0 and the like. FIG.
FIG. 7 shows a state immediately before insertion into the bar member.
10 and a state in which the distal end component 6 is inserted into the distal end cover 10
The state in which the distal end component 6 is being removed from the member 10
FIG. 9 shows the front cover member 10 with a front end structure.
Insert the component 6 and complete the engagement of the engaging portion 13 and the locking portion 4
The leading end component 6 from the leading end cover member 10
When removing, the cylindrical portion is deformed so that the elastic deformation portion 12 can be deformed.
FIG. 4 is an axial cross-sectional view showing a state where a material 15 is deformed.
6, 8, and 10 are CCs of FIGS. 5, 7, and 9, respectively.
It shows DD and EE cross sections, respectively. In the configuration of this embodiment, the endoscope for a cover
Insertion section for mounting the insertion section 3 of 2 on the insertion section cover 7
When inserting the insertion part 3 into the insertion part cover 7,
The distal end component 6 advances inside the insertion portion cover 7, and eventually the distal end
Reaching near the cover member 10, the tip component 6
Is fitted to the tip cover member 10 halfway. At this time,
The stop portion 14 comes into contact with the engagement portion 13, but the elastic deformation portion 12
Since the deformation is regulated by the cylindrical member 15,
Above, the distal end component 6 cannot be advanced. Then, the cylindrical member 15 is cut as shown in FIG.
Deforms inward (presses with your finger so that it does) toward the notch 50
Then, the cylindrical member 15 is deformed into an elliptical shape, and FIGS.
The elastic deformation portion 12 is deformed outside the elastic deformation portion 12 as shown in FIG.
A space 51 is formed, and the tip component 6 is inserted as it is.
Then, the inclined surface 14b of the locking portion 14 is engaged as shown in FIG.
The elastic deformation part 12 is deformed by pressing the part 13 radially outward.
(In this case, after the elastic deformation portion 12).
The outer surface of the end is a notched inclined surface 12a
And without hitting the outer cylindrical member 15.
The rear end side of the sex deformable portion 12 can be deformed outward). Continue ahead
As the end component 6 is inserted, the engagement portion 13
Override the locking part 14 by the elastic restoring force of the elastic deformation part 12
The engaging portion 13 and the engaging portion 14 are engaged. Here, the positions of the engaging portion 13 and the locking portion 14 are determined.
Even if there is a dimensional difference in the parts
13 and the inclined surface 14a of the locking portion 14 overlap each other.
The slope is set so that there is a dimensional difference in the mating direction.
13a and the inclined surface 14a are in a state where the elastic deformation portion 12 is deformed.
And the tip cover member 10 and the tip component 6 are engaged.
It will be stopped. Next, deformation of the cylindrical member 15 into the notch 50
To return the cross-sectional shape of the cylindrical member 15 to a circle.
Therefore, as shown in FIG. 2, the cylindrical member 15 is
The elastically deforming part 12 is in a state of being covered with the cylindrical part.
The material 15 is in a state where the deformation is restricted. In other words,
The mating portion 13 abuts on the locking portion 14 or the elastic deformation portion 12
It is securely engaged in the radially inward direction by the
The mating state is maintained, and the tip side is fixed without rattling
Is done. Then, the tip end portion 6 and the tip end cover 6
Endoscopy can be performed with the member 10 fixed.
You. When removing the insertion portion cover 7, a cylindrical member
15 again inwardly toward the notch 50
As shown in FIGS. 9 and 10, the elastic deformation portion 12 is elastically deformed to the outside.
There is a space 51 in which the part 12 can be elastically deformed. But this
If the cylindrical member 15 is simply deformed as described above,
The engaging portion 13 is not disengaged and the distal end component 6 is covered with the distal end cover.
While still being locked to the member 10, the tip component 6 and the tip
The cover member 10 does not come off. Next, as shown in FIG.
And pulls out the distal end component 6 toward the proximal end side of the insertion portion 3
And the locking portion 14 push up the engaging portion 13, and the elastic deformation portion 12
Is deformed in the space 51, and the engagement between the locking portion 14 and the engaging portion 13 is performed.
Is released, the fixing at the tip is released, and as shown in FIG.
The distal end component 6 can be removed from the cover member 10 and the insertion portion 3
The removal of the insertion section cover 7 becomes possible. This embodiment has the following effects. This embodiment
In the configuration described above, the tip cover member 10 and the tip
Even if there is a dimensional difference about the part tolerance
The surfaces with which the portions 14 engage are provided with slope portions 13a and 14a.
Therefore, these errors are absorbed and the two come into contact / engagement.
I can do it. At this time, the elastic restoring force of the elastic deformation portion 12 causes
When the engaging portion 13 presses the locking portion 14, the leading end constituting portion
6 is urged toward the front end of the cover, and in this state,
Since the cylindrical member 15 is covered, the elastic deformation portion 12
And a tip cover portion (at a position facing the elastic deformation portion 12)
The cylindrical member 15 comes into close contact with the material 10 and is packaged.
Therefore, the engagement state can be more firmly maintained. Further, even when there is no dimensional difference, the engagement with the engagement portion 13 is also possible.
The stop portion 14 is securely engaged to cover the cylindrical member 15.
Therefore, it can be reliably held in the engaged state. Also, elastic deformation part
Engagement by restricting deformation of 12 by cylindrical member 15
The movement of the part 13 is restricted, and the engaging part 13 is
That it gets over and gets disengaged.
I'm preventing. Tip configuration on tip inner surface of tip cover member 10
When the part 6 is in contact and biased,
Can be set. Therefore, the cover type with the cover attached
Even if the insertion portion of the endoscope 1 is bent or looped
Both tip members (tip component 6 and tip cover member 10) are missing
It can be fixed and held securely without being caught. The tip cover member 10 and the tip component
6 and the distance from the abutting surface to the locking portion 14 on the endoscope side.
Distance from the abutting surface to the engaging portion 13 on the endoscope cover side
By appropriately setting the separation, the tip cover member 10 and
The lens cover 19 and the tip cover 6 are
The first lens 17 of the object optical system 18 is close enough or dense
The clearance is a predetermined value (for example,
0.1 mm or less).
Generation of rare or ghost can be prevented. The outer peripheral surface of the distal end portion 6 is cut out and the locking portion is formed.
14, and a front end cover is
The engagement portion 13 is provided inside the outer peripheral circle of the member 10.
The space for the locking portion 14 and the engaging portion 13 is newly added.
Has the effect of reducing the diameter of the insertion section without requiring
I do. In the tip cover member 10, the cylindrical member 1
5 has a small diameter by the thickness of the cylindrical member 15.
So that the thickness of the cylindrical member 15 corresponds to the thickness of the insertion portion cover.
There is no possibility that the outer diameter becomes large. Further, the cylindrical member 15
Since it does not protrude outward, the outer skin 9 is broken by the cylindrical member 15.
Loss, and the resistance of the outer skin 9 can be reduced.
It has the effect that removal is easy. Further, the cylindrical member 15 and the tip cover member 1
0, deformed inward with the cylindrical member 15 and elastically deformed
The elastic deformation portion 12 can be deformed in the vicinity of the portion 12 and engage with the engagement portion 13.
Notch to create space 51 just enough to disengage stop 14
By providing the part 50, the tip of the endoscope cover 4 can be
Pull out the insertion part 3 while holding it with
Just remove the endoscope cover 4 with a light force
Can be inserted into the insertion section cover 7,
When the force is applied, the cylindrical member 15 is deformed,
There is a space 51 outside the elastic deformation portion 12 that can be deformed.
Even if the engagement between the engaging portion 14 and the locking portion 13 is maintained,
That the fixing on the tip side is released.
The endoscope cover 2 came off during the inspection
The worst situation, such as disability, cannot occur,
A full inspection can be taken. Further, in the present embodiment, the tip
The tip surface is in the distal end direction on the inner surface of the tip cover member 10.
For the abutting part, for example, as shown in FIG.
19, the lens cover 19 and the elastically deformable portion 12 and the engagement.
The tip cover member having the portion 13 is
In the same manner as the bright member,
May be provided integrally with the tip cover member 10. Also, the part that abuts as shown in FIG.
A cover member having an elastic deformation portion 12 and an engagement portion 13
The light shielding unit 54 provided integrally with the lens cover 19 may be used.
Are separate and the lens cover 19 is in contact with the tip cover member 10.
The lens cover 19 is provided with the lens cover
The distal end component 6 or the objective lens 17 abuts
In comparison with the case, the strength is improved, and the tip component 6 is
Even when biased toward the distal end side by the elastic force of the elastic deformation portion 12,
It has the effect of being hard to break. Further, the cylindrical member 15 is cut as shown in FIG.
On the outer surface of the outer skin 9 of the portion deformed inward toward the cutout 50
An index 57 serving as a mark such as a white circle may be provided.
This has the effect of making it easier for the operator
You. In addition, in FIG.
There is a display of numbers indicating the length of
So that you can see how much you inserted
You. The notch 50 has a cylindrical shape with the tip cover member 10.
As shown in FIG.
Inner surface, and the inner end cover member 10 and the end structure
It may be provided between the unit 6. In this case, the notch 5 in FIG.
0 and the tip cover member 10 between the tip component 6
Since there is no need to provide, the advantage is that the diameter can be reduced accordingly.
There is a (Second Embodiment) FIGS. 15 to 17 show the present invention.
FIG. 15 shows the insertion of a cover-type endoscope according to the second embodiment of the present invention.
FIG. 16 is a radial cross-sectional view showing the detailed configuration of the tip of the portion, and FIG.
It is the same sectional view explaining the inside operation. In the second embodiment
Therefore, the second embodiment is almost the same as the first embodiment.
The same reference numerals are used for the description, and the description is omitted. As shown in FIG. 15, the notch 50 is
2 and within 90 ° with respect to the center axis of the tip cover member 10.
So that the notch 50 and the vicinity of the elastic deformation portion 12
Cylindrical member 15 other than the outer peripheral surface connected at a distance and tip cover
The cylindrical member 15 is connected to the joining portion 58 where the material 10 contacts.
The front cover member 10 is joined by means such as adhesion. The notch 50 faces the notch 50.
When the cylindrical member 15 is deformed inward by the
And a new space 51 is formed outside of
At least the size of the space 51 is changed by the elastic deformation portion 12.
Large enough to disengage the engaging part 13 and the engaging part 14
The notch 50 may be formed by the cylindrical member 15.
It is a size that creates a space. Next, the operation of this embodiment will be described. FIG.
The cylindrical member 15 is deformed inward toward the notch 50
Then, as shown in FIG. 16, the cylindrical member 15 and the tip cover
The cylindrical member 15 of the joint portion 58 to which the member 10 is fixed
Is not deformed, and the cylindrical member 15 on the outer peripheral portion of the elastic deformation portion 12 is not deformed.
Is deformed to have a non-circular shape outward, and the elastically deforming portion 12
Can be deformed as long as the engagement between the locking portion 14 and the engaging portion 13 is released.
A space 51 is generated. At this time, the distal end component 6 is connected to the distal end cover member 1.
0, the inclined surface of the locking part 14 is elastically deformed.
The engaging part 13 is pushed up by deforming the part 12 and
First, the engagement portion 13 is engaged by the elastic restoring force of the elastic deformation portion 12.
After passing over the stop portion 14, the locking portion 14 and the slope portions 13a, 14
a. Then, deformation of the cylindrical member 15
By stopping the elastic deformation portion 12 and the elastic deformation portion 1
A cylindrical portion is formed at the tip cover member 10 corresponding to the position 2
The material 15 is covered, and the elastic deformation portion 12 is
Deformation is restricted, and the engaging portion 13 is locked.
Engagement of the part 14 is ensured. Similarly, the cylindrical member 15 is deformed.
When the tip cover member 10 is pulled out in the state, the locking portion 14
Push up the engaging part 13 and pull it out to complete
The engaging portion 14 and the engaging portion 13 are disengaged from the
7 can be removed from the insertion part 3. This embodiment has the following effects. 1st real
Same as the embodiment, except for the outside of the elastic deformation portion 12.
And a cylindrical shape in the vicinity thereof and in portions other than the notch 50
By fixing the member 15 and the front cover member 10,
Cylindrical member 1 deformed inward toward the notch 50
All the deformation amounts of 5 are deformed outward near the elastic deformation portion 12.
Therefore, with a small amount of deformation, a space is formed outside the elastic deformation portion 12.
51 can be created. In other words, a small pushing amount
It is only necessary to press one place again,
You. Further, as shown in FIG.
Even if the cylindrical member 1 is fixed at the joint portion 58 at the opposite position,
5 is elastically deformed toward the notch 50
Deformation amount 12 is deformed outward at the outside and in the vicinity thereof.
Therefore, the detachment operation can be performed with a small pushing amount. Also cylindrical
The member 15 is made of a resin such as polycarbonate or acrylic.
It may be molded integrally at the joining part
Therefore, a similar effect can be obtained. (Third Embodiment) FIG. 18 to FIG.
FIG. 18 shows the insertion of a cover type endoscope according to the third embodiment of the present invention.
19 is a longitudinal sectional view showing the detailed configuration of the distal end of the portion, FIG.
FIG. 20 is a sectional view taken along the line GG of FIG. 18, and FIG.
FIG. 21 is a sectional view taken along line HH of FIG.
You. The same components as those in the first and second embodiments have the same reference numerals.
And the description is omitted. As shown in FIG. 18 and FIG.
0, two sets of locking portions 14 and engaging portions 1
3. An elastic deformation portion 12 is provided.
At a position rotated by about 90 ° about the center axis of zero.
Notches 50 are provided at two places. The notch 50 is directed toward the notch 50
When the cylindrical member 15 is deformed, the notch 50
Direction of rotating the bar member 10 by approximately 90 ° about the central axis
Outside the elastic deformation part 12
Is configured so that a new space 51 is generated in each space 5.
The size of 1 is such that at least the elastic deformation portion 12 is deformed and engaged.
It is sufficient if the portion 13 and the locking portion 14 are disengaged.
The notch 50 causes the cylindrical member 15 to create a space corresponding thereto.
The size has become. Next, the operation will be described. 18 and FIG.
In the state, the cylindrical member 15 is inserted toward the notch 50.
As shown in FIGS. 20 and 21,
The notch 50 is approximately 9
Deformed in an elliptical flat shape in the direction rotated by 0 °, each bullet
Sexually deforming part 12 is disengaged from locking part 14 and engaging part 13
Only the space 51 that can be deformed is generated. At this time, the distal end component 6 is connected to the distal end cover member 1.
0, the inclined surface of the locking portion 14
Is pushed up while deforming the elastic deformation portion 12, and
When proceeding, the engaging portion 13 makes the locking portion 14 elastically deformable by the elastic deformation portion 12.
The locking portion 14 and the slope portions 13a, 14a are brought into contact by the restoring force
So that they are engaged. And cutting of the cylindrical member 15
By stopping the deformation to the notch 50, the
As shown, a cylindrical member 15 is provided on each elastic deformation portion 12.
As a result, the engagement between the engaging portion 13 and the locking portion 14 is ensured. Similarly, the cylindrical member 15 is deformed.
When the tip cover member 10 is pulled out in the state,
Pushes up the engaging portion 13 and removes it as it is,
The engaging portion 14 and the engaging portion 13 are completely disengaged and the insertion portion cover
7 can be removed from the insertion part 3. This embodiment has the following effects. 1st real
Same as the embodiment, except that in the first embodiment,
When the elastic member 15 is deformed into an elliptical shape,
The vicinity of the side and the elastic deformation portion 12
The tip cover member 10 and the circle are located at positions opposite to the center axis.
A space 51 composed of the cylindrical member 15 is generated, but as a function
Uses only one space 51 generated outside the elastic deformation part 12
Space 51 on the opposite side is useless.
Was. On the other hand, in this embodiment, two empty
The front cover member 10 and the front end component 6 correspond to the gap 51.
And two sets of the engaging portion 13, the locking portion 14, and the elastic deformation portion 12.
By providing, the engaged portion becomes two places,
Although the operation itself is the same as in the first embodiment, it is more robust.
The front cover member 10 and the front end component 6 can be engaged with each other.
There is an effect that rattling can be suppressed. (Fourth Embodiment) FIG. 22 and FIG.
FIG. 22 shows the insertion portion of the cover type endoscope according to the fourth embodiment.
FIG. 23 is a radial cross section showing the configuration of the end, and FIG.
It is the same sectional view explaining the operation of. First to third embodiments and
The same components are denoted by the same reference numerals, and the description thereof is omitted.
Abbreviate. As shown in FIG. 22, the elastically deforming portion 12, the engaging portion 1
3, the locking portion 14 and the notch 50 are the same as those shown in FIG.
Is a range within 90 ° around the central axis of the tip cover member 10.
The one notch 50
Has an air supply tube 2 made of an elastic member such as Irax
5. Water supply tube 26 and forceps insertion channel 27 are arranged
Have been. Next, the operation of this embodiment will be described. FIG.
(But not the tip component 6)
The cylindrical member 15 toward the notch 50
Tube 25 and forceps insertion channel 27 are elastically deformed together
When this is done, as shown in FIG.
° The direction of rotation about the central axis of the tip cover member 10,
That is, the position outside the elastic deformation portion 12 and its point-symmetric position
A space 51 is generated. At this time, the distal end component 6 is connected to the distal end cover member 1.
0, the engaging portion 14 elastically deforms the engaging portion 13.
Push up while deforming the shape part 12 and proceed as it is
The joint portion 13 is provided with an elastic restoring force of the elastic deformation portion 12 by the locking portion 14.
So that the locking portion 14 and the slope portions 13a, 14a come into contact with each other.
Is engaged. Then, the notch 50 of the cylindrical member 18 is
By stopping the deformation, the cylindrical member 15 is
It is externally provided, and the engagement between the engaging portion 13 and the locking portion 14 is ensured.
You. At this time, the air supply tube 25 and the forceps insertion channel 2
7 also returns to its original shape when the deformation is stopped, and the wearing state of FIG.
Can be set to Similarly, the cylindrical member 15 is deformed,
The air supply tube 25 and the forceps insertion channel 27 are deformed.
When the tip cover member 10 is pulled out in the
4 pushes up the engagement portion 13 and removes it as it is.
The engaging portion 14 and the engaging portion 13 are completely disengaged and the insertion portion cover
-7 can be removed from the insertion section 3. This embodiment has the following effects. 1st real
Same as the embodiment, but further includes forceps insertion channel 27
The notch 50 is provided by notching the peripheral portion of
Forceps insertion channel 27, air supply tube 25, water supply tube
Space is saved by sharing the part where the
Can be measured. Further, in this embodiment, the cylindrical member 15 is
The forceps insertion channel 27 and the air supply tube
25, any one of the water supply tubes 26
It is also good to arrange in the notch 50
25, water supply tube 26, forceps insertion channel 27
Either one or all may be used, and the tip is fixed and fixed
When releasing, perform air supply, water supply, suction, and insertion of forceps.
Because I do not know, the air supply tube 25, water supply tube 26, forceps
No problem occurs even if the child insertion channel 27 is deformed.
No. In addition, the air supply tube 25, the water supply tube 26, the forceps insertion
Since the channel 27 can be deformed with a light force,
Tube 25, water supply tube 26, forceps insertion channel
Even if it deforms 27 together, the operational feeling does not decrease in particular. In the first to fourth embodiments described above,
As shown in FIG. 24, the locking portion 14 is formed by cutting out the distal end portion 6.
The locking portion 14 is provided as a concave portion provided, and this locking portion 14 is
You may make it engage with the engagement part 13. Also, as shown in FIG.
The engagement portion 13 is provided by cutting the inner surface side of the elastic deformation portion 12.
Even if it is engaged with the locking portion 14 protruding outward as a concave
good. By the way, as explained in the above-mentioned section of the prior art.
Endoscope due to variations in dimensions of the endoscope cover etc.
If there is a space between the optical system and the tip of the cover,
Keep the optical system and cover sufficiently close or in close contact.
Can not be held, and the observation optical system and illumination optical system of the endoscope and the cover
Optical defects such as ghosts and flares may occur between
There is. In view of these circumstances, an endoscope for a cover
Make sure that the tip and the endoscope cover tip are securely fixed.
Cover type after the fifth embodiment focusing on holding
The endoscope will be described below. FIGS. 26 to 29 show endoscopes for covers and
Both ends of the endoscope cover can be reliably maintained in a fixed state
FIG. 26 shows an overall configuration of a cover-type endoscope according to the fifth embodiment.
FIG. 27 is a perspective view showing the distal end of the insertion portion of the cover type endoscope.
FIG. 28 is a longitudinal sectional view showing a detailed configuration of FIG.
FIG. 29 is a sectional view taken along line A′-A ′, and FIG.
Longitudinal section showing the state during insertion of the mirror insertion part
FIG. The cover type endoscope 1 of this embodiment is shown in FIG.
As shown, the cover endoscope 2 and the cover endoscope 2
With endoscope cover 4 covering at least insertion portion 3
It is composed of The cover endoscope 2 has a base for the elongated insertion portion 3.
An operation section 5 also serving as a grip section is continuously provided on the end side,
A distal end component 6 is provided on the distal end side. Meanwhile, endoscope
The mirror cover 4 is an insertion portion cover that covers the insertion portion 3
7 and an operation unit cover 8 that covers the operation unit 5.
You. The insertion portion cover 7 is attached to the tip of the soft tubular outer skin 9.
Tip cover member 1 externally inserted into tip component 6 on the end side
0 is connected to the operating portion 5 at the base end of the outer skin 9.
The mouth part 11 to be fixed is provided continuously. operation
The section cover 8 is made of a thin and soft material such as vinyl chloride.
It is formed of a polymer material film member. These covers
Are all sterilized before use. Next, referring to FIG. 27 to FIG.
The detailed configuration of the distal end portion of the mirror insertion section 3 and the insertion section cover 7 will be described.
I will tell. FIG. 27 shows the endoscope insertion section 3 with the insertion section cover 7 mounted thereon.
FIG. 29 shows the endoscope in the insertion portion cover 7 after the attachment is completed.
Each length in the state of inserting the insertion part 3
FIG. 28 is a radial cross section of the distal end portion (FIG. 27).
(A′-A ′ section of FIG. 2). The insertion section cover 7 is made of cylindrical urethane or salt.
The cover 9 is made of a thin tube made of vinyl chloride, etc.
-The main body is composed, and the tip of the outer skin 9 is
The cover member 10 is provided in an airtight manner. Destination
At the side peripheral portion of the end cover member 10, the rear end side in the longitudinal direction of the insertion portion
An elastically deforming portion 12 is provided extending from the elastically deforming portion.
12 has one end fixed to the tip cover member 10 and a fulcrum
The other end is movable in the insertion portion radial direction.
The other end of the elastic deformation portion 12 has an engagement portion 13 projecting inward.
Is provided, while on the outer peripheral side of the distal end component 6 of the endoscope.
An outwardly protruding locking portion 14 is provided, and these engaging portions are provided.
13 and the engaging portion 14 are engaged with each other. The locking portion 14 of the distal end component 6 is
A projection is formed by cutting out the outer peripheral surface of the tip component 6.
The engaging portion 13 of the tip cover member 10 is
A protrusion is formed protruding from the inner peripheral surface of the bar member 10 and
It is provided inside the outermost circumference circle of the cover member 10. In the vicinity of the elastic deformation portion 12, the length of the insertion portion
Part of the elastically deformable portion 12 and the front cover portion
A cylindrical member 15 extrapolated outside the material 10 is provided.
I have. The elastic deformation portion 12 and the outer skin 9 near the elastic deformation portion 12
Between them, there is a space corresponding to the thickness of the cylindrical member 15, and this space
The rear end of the front cover member 10 is smaller than the front end by the space.
It has a small diameter. The cylindrical member 15 is made of resin.
The tip cover member 1 is formed of a thin metal pipe material or the like.
0 has an outer diameter smaller than the diameter of the outermost circle. The engaging portion 13 and the locking portion 14 are provided on both sides.
Even if dimensional differences such as product tolerances occur,
The surfaces where the engaging portions 13 and the engaging portions 14 are engaged form slopes with each other.
Even if there is a dimensional difference, the error is
The locking portions 14 are configured to be shifted in the overlapping direction.
You. In addition, a distal end is provided on the distal end side of the insertion portion of the locking portion 14.
The inclined surface 1 so that the outer diameter of the tip component 6 becomes smaller as
4b is formed to engage with the locking portion 14 of the engaging portion 13.
The proximal end side of the insertion section has a distal end cover
The inclined surface 13a is formed so that the inner diameter of the member 10 is reduced.
At the proximal end on the outer peripheral surface on the proximal end side of the elastic deformation portion 12.
Inclined surface 12a in which the outer diameter of the elastic deformation portion 12 becomes smaller
Is formed. [0091] The distal end side of the distal end cover member 10 has an inner side.
Thick support that fits with the distal end component 6 of the endoscope and supports the distal end
A part 16 is formed. The inside of the distal end component 6 is observed from the distal end side.
Optical system 9 or observation optical system for forming a subject image)
8 (the first lens at the tip is denoted by reference numeral 17),
An imaging unit 28 for converting a body image into an electric signal;
An image control unit that converts the image signal from the knit 28
(Not shown) signal cable 29 is provided.
And illumination optics (not shown) substantially parallel to the observation optical system 18.
A system is provided. On the distal end surface of the distal end cover member 10
Is the first lens 17 of the observation optical system 18 and the illumination optics
Lens cover facing these optical systems to cover the system
19 are provided. In the configuration of the present embodiment, an endoscope for a cover
In order to attach the insertion part cover 7 to the insertion part 3 of the
When inserting the mirror insertion portion 3 into the insertion portion cover 7, the insertion portion
Inserting the cover 7 to the bottom of the endoscope storage section completes the insertion.
At the stage immediately before completion, the distal end component 6 is
To the supporting portion 16. At this time, as shown in FIG.
In addition, the locking portion 14 of the distal end portion 6 is engaged with the elastic deformation portion 12.
Abutment portion 13 and the inclined surface 14b of the locking portion 14
3 is pushed up in the radial direction. As the insertion proceeds further to the distal end, the engaging portion 13
The engaging part 13 and the engaging part 14 are engaged
The tip cover member 10 and the tip component 6 are locked together.
Fixed. Next, as shown in FIG.
Extrapolating the cylindrical member 15 to part or all of 2
Thus, the deformation of the elastic deformation portion 12 is restricted, and the engagement portion 13 is engaged.
Engagement state is ensured in the state of being in close contact with or biased to the stop portion 14.
Will be retained. As a result, the insertion portion cover 7 is
Be attached to the insertion part 3 of the endoscope 2 so that there is no play
The tip is fixed. At this time, the cylindrical member 15 is elastically deformed.
The elastic body is plastically deformed, and the elastically deformable portion 12 and the tip cover
It is extrapolated to the member 10. Note that the elastic deformation portion 12 is deformed.
When the cylindrical member 15 is fitted in the
Also, an inclined surface 12a is provided on the outer peripheral surface of the elastic deformation portion 12.
Therefore, the cylindrical member 15 is smoothed along the inclined surface 12a.
And can be extrapolated to the
The mating portion 13 presses against the locking portion 14. When removing the insertion portion cover 7, the cylindrical portion
Inserting part so that material 15 is out of the deformation range of elastic deformation part 12
By moving in the axial direction, the elastic deformation portion 12 can be deformed.
It works. When the endoscope insertion section 3 is pulled out in this state,
The locking portion 14 of the end configuration portion 6 has a base end portion and a front end portion of the elastic deformation portion 12.
The engaging portion 13 is formed with the fixed portion with the cover member 10 as a fulcrum.
Push up to deform the elastic deformation part 12 and remove the cover
Is possible. In the structure of this embodiment, the front cover member 1
0, a dimensional difference of about the component tolerance occurs in the tip component 6
However, the surface where the engagement portion 13 and the engagement portion 14 are engaged is a slope.
The two absorb the error, making it easier for the two to abut and engage.
I have. At this time, due to the elastic restoring force of the elastic deformation portion 12,
When the joining portion 13 presses the locking portion 14,
It is urged toward the cover tip, and in this state, the cylinder
The elastic member 15 is elastically deformed or plastically deformed and expanded.
Since it is extrapolated in a bent shape, the elastic deformation
Extrapolating the cylindrical member 15 in close contact with the bar member 10
Thereby, the engagement state can be held firmly. Also, elastic deformation part
Engagement by restricting deformation of 12 by cylindrical member 15
The movement of the portion 13 is restricted, and the engaging portion 13 rides on the locking portion 14.
To prevent disengagement from
You. Further, the supporting portion 16 of the distal end cover member 10 is
The tip of the tip cover member 10 is
The distal end component 6 is brought into contact with and urged against the inner surface of the end.
A secure fixation without any damage can be performed. So put on the cover
Even if the insertion section is bent or looped in the
The ends are securely fixed without shifting. Then, the tip cover member 10 and the tip component
6 and the distance from the abutting surface to the locking portion 14 on the endoscope side.
Distance from the abutting surface to the engaging portion 13 on the endoscope cover side
By appropriately setting the separation, the tip cover member 10 and
The lens cover 19 is viewed in a state where the tip component 6 is engaged.
The first lens 17 on the front of the observation optical system 18 is sufficiently close
Or a predetermined value (e.g.,
(For example, 0.1 mm or less).
Flares and ghosts can be prevented. Further, the engaging portion 13 on the cover side and the engaging portion 13 on the endoscope side
Since a slope portion is provided for each of the stop portions 14,
When the cylindrical member 15 as a step is in the deformation range of the elastic deformation portion 12,
Can be easily released by removing the cover.
The operability is good because the attachment and removal of the
Therefore, the loading / unloading operation can be performed easily and smoothly. Further, the outer peripheral surface of the distal end portion 6 is cut out.
Locking portion 14 is provided.
An engaging portion 13 is provided inside the outer circumferential circle of the end cover member 10.
As a result, the space for the locking portion 14 and the engaging portion 13 is newly added.
The effect of reducing the diameter of the insertion section without the need for a pace
Have fruit. Further, the distal end cover member 10 has a cylindrical shape.
The part where the member 15 is located is the thickness of the cylindrical member 15
Since the diameter of the cylindrical member 15 is small, the thickness of the insertion portion
There is no possibility that the outer diameter of the bar becomes large. Further cylindrical members
15 does not protrude outward, so the outer shell of cylindrical member 15
9 can be prevented, and the resistance of the outer skin 9 can be reduced.
Therefore, there is an effect that attachment and detachment become easy. Further, the inclined surface 1 is formed on the outer peripheral surface of the elastic deformation portion 12.
Instead of providing 2a, the insertion portion distal end of the cylindrical member 15
Inclined so that the wall thickness decreases toward the distal end on the inner side
Similar effects can be obtained by providing a surface. As described above, according to the present embodiment, the cover
No backlash between the endoscope tip and cover tip
Secure fixing can be realized and this fixed state can be maintained
It becomes possible. Also, the objective lens system of the endoscope distal end component
The end surface is in close contact with or sufficiently close to the inner surface of the lens cover
Optical problems such as flare
Can be prevented. In addition, a cylinder is formed from the outside of the cover through the outer skin 9.
To improve the operability when inserting and removing the cylindrical member,
The member may be configured as shown in FIG. FIG. 30 shows an example of a structure in which a cylindrical member and an outer cover are connected to each other.
In order to reduce the resistance, fit the outer circumference to the inner
Provided with a polygonal cylindrical member 15a.
You. According to this configuration, the outer skin 9 and the cylindrical member 15a
Since the number of contact points is reduced, the contact with the outer skin 9 of the cylindrical member 15a is reduced.
The frictional resistance between the members is reduced, and the cylindrical member 15a is smoothed.
The elastic deformation part 12 and the tip cover member 10
Operability is improved. FIGS. 31 to 34 show a sixth embodiment of the present invention.
FIG. 31 shows details of the distal end of the insertion portion of the cover-type endoscope.
FIG. 32 is a longitudinal sectional view showing the structure, and FIG.
B 'line sectional view, FIG. 33 shows an endoscope inserted inside the endoscope cover
Longitudinal sectional view showing a state in the middle of inserting the part,
FIG. 34 is a sectional view taken along line C'-C 'of FIG. The sixth embodiment is different from the fifth embodiment in that
This is an example in which the configuration of the locking portion is changed and a concave portion is provided as an engaging portion.
You. The distal end cover member 20 of the insertion portion cover includes
Although the elastic deformation portion 21 is provided similarly to the fifth embodiment,
On the proximal end side of the elastically deforming portion 21 of FIG.
In addition, an engagement portion 22 having a recess formed inside is provided.
You. On the other hand, on the outer peripheral side of the distal end component 23 of the endoscope,
Protruding locking portions 24 are provided, and these engaging portions 22 and
The locking portion 24 is to be engaged. In this embodiment, the front cover member is
Instead of providing a support that supports the endoscope distal end component,
The distal end of the distal end component 23 holds the distal end of the endoscope insertion portion.
Holding portion 125 is provided.
You. The engaging portion 22 and the locking portion 24 are provided on both sides.
Even if dimensional differences such as product tolerances occur,
The surfaces where the engagement portions 22 and the engagement portions 24 are engaged form slopes with each other.
It is configured. Further, the insertion portion proximal end of the engagement portion 22
On the side, the thickness of the elastic deformation portion 21 becomes thinner toward the proximal end.
The inclined surface 22a is formed so that the locking portion 24 is inserted.
The distal end side of the distal end portion 23
The inclined surface 24a is formed so as to have a small diameter, and the holding portion 1
The distal end side of the distal end portion 2
(3) The inclined surface 125a is formed so that the outer diameter is small.
You. The elastic deformation portion 21 and the front cover member 20
The cylindrical member 126 extrapolated to the outside is, as shown in FIG.
A notch 12 in which a part of the circumference is cut out in the axial direction of the insertion portion.
7. The configuration of other parts is the same as in the fifth embodiment.
The description is omitted. In the structure of this embodiment, the inside of the cover
In order to attach the insertion section cover 7 to the insertion section 3 of the endoscope 2,
When inserting the endoscope insertion section 3 into the insertion section cover 7,
Insert the end cover member 20 to the bottom of the endoscope storage section
When the insertion is completed, the distal end component 23 becomes the distal end cover member.
20 is fitted. At this time, as shown in FIG.
The holding part 125 and the locking part 24 of the component part 23 are elastically deformable parts.
21 abuts against the inclined surface 22a of the engaging portion 22 and the holding portion 12
5 and the inclined surface 24a of the locking portion 24 are in order.
Then, the engaging portion 22 is pushed up in the radial direction. As the insertion proceeds further to the tip, the engagement portion 22
The distal end side rides over the locking portion 24 and the engaging portion 22 and the locking portion
24, and the front cover member 20 and the front constituent portion 23
Are locked and fixed. Next, as shown in FIG. 31 and FIG.
Part or the entirety of the cylindrical member 126
The cylindrical member 126 is positioned so that the thick portion is located.
By extrapolating to the front end cover member 20, the elastic deformation portion 21
Is restricted from being deformed, and the engaging portion 22
Is securely held in the biased state, and the insertion portion
The cover 7 is attached to the insertion section 3 of the endoscope 2 for cover.
Thus, both ends are fixed. When removing the cover, the cylindrical member 126
Is rotated in the circumferential direction, and as shown in FIG.
33 is located in the deformation area of the elastic deformation portion 21,
As shown in (2), the elastic deformation portion 21 can be deformed. this
When the endoscope insertion section 3 is pulled out in the state,
The locking portion 24 includes a base end portion of the elastically deforming portion 21 and the front end cover member 2.
0 and push up the engaging portion 22 with the fixed portion at
The deformable part 21 is deformed and the cover can be removed.
You. In the structure of this embodiment, the fifth embodiment is different from the fifth embodiment.
Similarly, the tip of the cover endoscope and the tip of the cover are lifted.
It can be fixed securely without sticking. In the sixth embodiment,
Elastic deformation by rotating the cylindrical member 126 in the circumferential direction
Since the regulation of the part 21 can be released, the work of attaching and detaching the cover is easy.
Can be. FIGS. 35 to 37 show a seventh embodiment of the present invention.
FIG. 35 shows details of the distal end of the insertion portion of the cover-type endoscope.
FIG. 36 is a longitudinal sectional view showing the structure, and FIG.
D 'line sectional view, FIG. 37 shows the endoscope inserted inside the endoscope cover
FIG. 7 is a longitudinal sectional view showing a state in the middle of inserting the part.
is there. The seventh embodiment is different from the fifth embodiment in that the engaging portion and the locking portion
This is an example in which a groove portion is provided as a locking portion by changing the configuration of FIG. The distal end cover member 30 of the insertion portion cover includes
Engaging part 3 protruding inward to the proximal end side as in the fifth embodiment
2 is provided. On the other hand endoscope
The projection of the fifth embodiment is provided on the outer peripheral side of the distal end component 33 of the mirror.
A locking portion 34 having a groove formed in place of the portion is provided.
The engaging portion 32 and the engaging portion 34 are engaged with each other.
I have. The surfaces on which the engaging portions 32 and the engaging portions 34 are engaged
The slope is formed. Further, instead of the cylindrical member, an elastic deformation portion
In the vicinity of the elastic deformation portion 31, there is a shift in the radial direction of the insertion portion.
The outer diameter for regulating movement is the outer circumference of the tip cover member 30.
And the inner diameter is the same as that of the arc surface outside the elastic deformation portion 31.
Pressing member 3 whose surface is formed in an arc shape as shown in FIG.
5 are provided. The structure of the other parts is the same as that of the fifth embodiment.
Yes, description is omitted. In the configuration of the present embodiment, the endoscope for a cover
In order to attach the insertion part cover 7 to the insertion part 3 of the
When inserting the mirror insertion section 3 into the insertion section cover 7,
When the bar member 30 is inserted to the bottom of the endoscope housing section,
At the stage when the insertion is completed, the distal end component 33 is
Fits. At this time, as shown in FIG.
The tip of the portion 33 is on the proximal end side of the engaging portion 32 of the elastic deformation portion 31.
It comes into contact with the inclined surface and pushes up the engaging portion 32 in the radial direction. Sa
When the insertion proceeds further to the distal end, the engaging portion 32 and the locking portion 34
Engage, the tip cover member 30 and the tip component 33 are locked
It is fixed. Next, as shown in FIG. 35 and FIG.
The pressure member 35 contacts a part or the whole of the elastic deformation part 31
Axially to a position where it can be
Get into the space. To the proximal end side of the insertion part in the tip configuration part
When a directional force is applied, the elastically deforming portion 31 moves radially outward.
Deformation is attempted, but by engaging the pressing member 35
The elastic deformation of the pressing member 35 and the outer skin 9
31 is pressed in the center direction to restrict the deformation,
2. Engagement state is reliably maintained in a state where the locking portion 34 is urged.
Then, the insertion section cover 7 is inserted into the insertion section 3 of the cover endoscope 2.
Attached to. When removing the cover, press the pressing member 35
By moving from the deformation area of the elastic deformation part 31, elastic deformation
The deformation of the endoscope insertion portion 3 is enabled in this state.
Is pulled out, the distal end forming part 33 becomes the elastic deforming part 31 base end.
Engaging portion with a fixed portion between the shaft and the tip cover member 30 as a fulcrum
The cover can be removed by pushing up on 32
Becomes In the structure of this embodiment, the pressing member 35
The engaging portion 32 comes into close contact with the locking portion 34 by the elastic force of the
Or they are urged and there is no play due to the engagement of both
Reliable fixing can be achieved, and the same effect as in the fifth embodiment can be obtained.
You. In the seventh embodiment, the pressing member 35
The shape is not limited to a circular cross section, but a flat plate
When the elastic deformation portion 31 is deformed,
Is only large enough to transmit the biasing force of
Just do it. FIGS. 38 to 40 show an eighth embodiment of the present invention.
FIG. 38 shows details of the distal end of the insertion portion of the cover-type endoscope.
FIG. 39 is a longitudinal sectional view showing the configuration, and FIG.
Longitudinal state showing the state during insertion of the endoscope insertion part into the
FIG. 40 shows the endoscope insertion portion from the endoscope cover.
FIG. 5 is a longitudinal sectional view showing a state in the middle of removal.
You. In the eighth embodiment, the shape of the engaging portion in the fifth embodiment is changed.
This is a further example. The tip cover member 40 of the insertion portion cover includes
As in the fifth embodiment, an engaging portion protruding inward to the proximal end side
An elastic deformation portion 41 having an inner portion 42 is provided.
A projection projecting outward is provided on the outer peripheral side of the distal end component 43 of the endoscope.
A stopping portion 44 is provided, and the engaging portion 42 and the locking portion 44 are provided.
Are adapted to engage. [0129] The inner surface of the engagement portion 42 on the proximal end side of the insertion portion is provided with a hook.
Compared to the slope of the slope where the mating portion 42 and the locking portion 44 are engaged.
A gentle slope 42a with a gentle inclination of 5 ° to 30 °
Is formed. The configuration of other parts is the same as in the fifth embodiment.
The same is true, and the description is omitted. In the structure of the present embodiment, the inside of the cover
In order to attach the insertion section cover 7 to the insertion section 3 of the endoscope 2,
When inserting the endoscope insertion section 3 into the insertion section cover 7,
Insert the end cover member 40 to the bottom of the endoscope storage section
When the insertion is completed, the distal end component 43 is connected to the distal end cover member.
40 is fitted. At this time, as shown in FIG.
The locking part 44 of the constituent part 43 is the engaging part 42 of the elastic deformation part 41.
And the distal end side inclined surface of the locking portion 44 is in contact with the gentle inclined surface 42a.
44a gradually pushes up the engaging portion 42 in the radial direction. As the insertion proceeds further to the distal end, the engaging portion 42
The engaging portion 42 and the engaging portion 44 are engaged with each other after the
When the tip cover member 40 and the tip component 43 are locked,
And fixed. At this time, the circle restricting the deformation of the elastic deformation portion.
The cylindrical member 15 is provided with the engaging portion 4
It is extrapolated to the position shown in FIG.
However, at the time of insertion, as shown in FIG.
Since the slope of the engaging portion 42 on the side of
, The engaging portion 42 is pushed up and the elastic deformation portion 41 is deformed.
Then, it engages with the locking portion 44. In the state of FIG. 38 where the engagement is completed, the elastic deformation
When the portion 41 is elastically deformed, the elasticity of the elastically deformable portion 41
The engaging portion 42 presses the locking portion 44 by the restoring force, and
By urging the component 43 toward the distal end, the elastically deforming portion
41 is not elastically deformed and the engaging surface of the engaging portion 42 and the engaging portion 44
In the case of close contact, the engaging portion 42 and the locking portion 44 are completely engaged.
Alignment ensures that the distal end component 43 and the distal end
The fixed state of the bar member 40 is maintained. When the engagement is complete
In the state in which the engaging portion 42 is engaged with the locking portion 44,
Since the slope of is steep, the engaging portion 42 is pushed from this state.
To raise it requires more force than at the time of insertion.
The distal end component 43 and the distal end cover member 40
Can be fixed securely. When removing the cover, in the state shown in FIG.
Since a large amount of force is required for removal, as shown in FIG.
Then, the cylindrical member 15 is moved to the distal end side of the insertion portion to be elastically deformed.
By expanding the variable range of the shape portion 41, the elastic deformation portion 41
Can be deformed with a lighter force. Insert the endoscope in this state
When the part 3 is pulled out, the locking part 44 of the distal end constituent part 43 is engaged.
The elastic deformation portion 41 is deformed by pushing up the portion 42 and the engaging portion 4
2 can get over the locking part 44 and the cover can be removed.
is there. In the structure of this embodiment, the fifth embodiment is different from the fifth embodiment.
Similarly, the tip of the cover endoscope and the tip of the cover are lifted.
It can be fixed securely without sticking. In addition to this,
In this embodiment, when attaching the cover, the cylindrical member 15
Without moving it, place it in the position shown in FIG.
Since it only needs to be moved when leaving, one time is saved when mounting
This has the effect of making the mounting operation easier. FIGS. 41 to 43 show a ninth embodiment of the present invention.
FIG. 41 shows details of the distal end of the insertion portion of the cover-type endoscope.
FIG. 42 is a longitudinal sectional view showing the configuration, and FIG.
Longitudinal section showing the state when inserting the endoscope insertion part into the
43 is an enlarged view of the fixing pin portion of the elastic deformation portion.
FIG. The ninth embodiment is similar to the seventh embodiment.
The engaging portion of the elastic deformation portion is formed separately from the tip cover member.
This is an example. [0137] To the tip cover member 150 of the insertion portion cover
Is provided with an elastic deformation portion 151 extending to the rear end side of the insertion portion.
Have been. On the proximal end side of the elastic deformation portion 151, a large diameter
A fixed pin hole 152 composed of a small diameter two-stage hole is provided.
The fixing pin 153 engages with the fixing pin hole 152 of the
It protrudes inside the shape part 151. On the other hand, the endoscope
The outer peripheral side of the forming part 154 corresponds to the fixing pin 153.
A locking portion 155 having a groove formed at a position where
When the fixing pin 153 and the locking portion 155 are engaged
I have. The surface of the locking portion 155 that engages with the fixing pin 153 is inclined.
And the corner of the outer periphery of the tip of the fixing pin 153
A slope is formed. The configuration of other parts is the seventh implementation
This is the same as the example, and the description is omitted. In the structure of this embodiment, the endoscope for a cover is used.
In order to attach the insertion part cover 7 to the insertion part 3 of the
When inserting the mirror insertion section 3 into the insertion section cover 7,
When the bar member 150 is inserted to the bottom of the endoscope storage section,
When the insertion is completed, the distal end component 154 is moved to the distal end cover member.
150 is fitted. At this time, as shown in FIG.
The tip of the end component 154 contacts the fixing pin 153,
As the component 154 is inserted, the diameter of the fixing pin 153 is changed.
Push up in the direction. FIG. 43 is an enlarged view of the fixing pin 153.
FIG. As the insertion proceeds further,
The fixed pin 153 and the locking part 155 are engaged with each other, and the tip cover part is formed.
The material 150 and the tip component 154 are locked and fixed.
You. Next, from the state of FIG. 42, as shown in FIG.
Pressing member 35 is partially or entirely at the end of fixing pin 153.
Axially to a position where it can contact the
Enter 150 spaces. Insertion part proximal end side to tip component
When a force in the direction of pulling out is applied to the fixing pin 153,
Attempts to move radially outward, but engages pressing member 35
By doing so, the elastic force of the pressing member 35 and the outer skin 9
The fixing pin 153 is pressed toward the center, and
Contacting and biasing, the engagement can be reliably maintained,
The entrance cover 7 is attached to the insertion section 3 of the endoscope 2 for cover.
Can be When removing the cover, press it as shown in FIG.
The pressure member 35 is moved from the moving area of the fixing pin 153.
Thus, the cover can be removed. Configuration of the present embodiment
In the same manner as in the seventh embodiment, the tip of the cover endoscope is
And the cover tip must be securely fixed without play.
Can be. FIGS. 44 to 46 show a tenth embodiment of the present invention.
FIG. 44 shows an example of a distal end component and a distal end of a cover type endoscope.
FIG. 45 is a perspective view showing the structure of the cover member, and FIG.
Insertion part with component part and tip cover member engaged
FIG. 46 is a cross-sectional view in the radial direction, and FIG.
FIG. 7 is a perspective view showing a state in the middle of engaging with. In the tenth embodiment, the distal end component of the endoscope and the distal end
This is an example in which the configuration of an engagement portion with a cover member is changed. This
Here, only the configuration of the tip component and the tip cover member are shown.
The other parts are almost the same as in the fifth embodiment.
Therefore, the description is omitted. One end of the tip cover member 60 has a tip cover.
-Then is fixed to the member 60 and the other end side extends to the rear end side of the insertion portion.
Elastic deformation portion 61 which is movable in the circumferential direction
ing. At the proximal end side of the elastically deforming portion 61, a circumferential side
An engaging claw 62 protruding from the portion is provided. On the other hand endoscope
Protrudes radially outward on the outer peripheral side of
A locking portion 64 that engages with the engaging claw 62 is provided.
You. The surface where the engaging claw 62 and the engaging portion 64 engage is a part
Even if there are dimensional differences such as tolerances, mutual contact
It is formed with a slope. A circle for restricting deformation of the elastic deformation portion 61
A cylindrical member 65 is provided, and the cylindrical member 65
The elastically deformable portion 61 is fitted to the outside of the elastically deformable portion 61.
In the vicinity. Engaged with the cylindrical member 65
In this state, the engaging claw 62 and the locking portion 64 are sandwiched from both sides.
As shown in FIG.
You. At the distal end side of the insertion portion distal end side of the locking portion 64,
As the thickness of the protrusion decreases in the circumferential direction.
A slope 64a is formed, and the insertion portion proximal end of the elastic deformation portion 61
On the side opposite to the engaging claw 62 on the side, the protrusion becomes closer to the proximal end.
The inclined surface 61a is formed so that the circumferential thickness of the portion is reduced.
And the insertion end of the engaging claw 62 at the proximal end side as well as at the proximal end.
As the thickness of the protrusion decreases in the circumferential direction.
A slope 62a is formed. In the structure of the present embodiment, the tip cover
When inserting the distal end component 63 into the member 60, as shown in FIG.
As described above, the engaging portion 64 of the distal end portion 63 is
By pressing the slope 62a in the circumferential direction, the engagement claw 62 is
Are deformed in the circumferential direction. As the insertion proceeds further to the tip, the engagement claw 62
The engaging claw 62 and the locking portion 64 are engaged with each other over the locking portion 64.
44, the tip cover member 60 and the tip component
63 is locked and fixed. In this state, the cylindrical member 65 is moved
1 and extrapolated to the gripper 66 as shown in FIG.
The engaging claw 62 and the locking portion 64 from both sides.
By fitting the cylindrical member 65, the elastic deformation portion 61 is formed.
Deformation can be controlled, and
Can be. The state where the elastic deformation portion 61 is deformed
Even when the cylindrical member 65 is fitted with
An inclined surface 61a is provided at the proximal end of the deforming portion 61.
Therefore, the locking portion 64 and the inclined surface 61a of the elastic deformation portion 61
The holding portion 66 abuts and is fitted along the inclined surface 61a,
The claw 62 and the locking portion 64 are sandwiched. At this time, the elastic deformation
The engaging claw 62 urges the locking portion 64 by the elastic force of the shape portion 61.
Then, the engaging claw 62 and the locking portion 64 are securely engaged.
ing. The distal end component 63 is removed from the distal end cover member 60.
At the time of withdrawal, the gripping part 66 is in the deformation area of the elastic deformation part 61.
The cylindrical member 65 is moved in the axial direction to a position outside the
This allows the elastic deformation portion 61 to freely deform,
The pawl 62 gets over the locking part 64 and the cover can be removed
Noh. The configuration of this embodiment is the same as that of the fifth embodiment.
Between the end of the cover endoscope and the end of the cover
It can be fixed securely without failure. The fifth to tenth embodiments described above
In addition, as shown in FIG. 47 or FIG.
Alternatively, a regulating member consisting of a pressing member can be
Providing fixing means to prevent the restriction member from falling off
it can. A first example of the regulating member fixing means shown in FIG.
Is formed on the inner peripheral portion of the regulating member 70 from a convex portion (or a concave portion).
The engaging portion 71 is provided in the vicinity of the distal end cover member 72.
A locking portion 73 composed of a concave portion (or a convex portion) is provided on the outer peripheral portion of the end.
Provided by the engaging portion 71 and the locking portion 73.
The fixed part is configured. The engaging portion 71 and the locking portion 73
By engaging, the regulating member 70 and the tip cover member
72 can be fixed to prevent the restriction member 70 from falling off.
In addition, the locking portion 73 on the tip cover member side is
72 on the outer periphery of the proximal end of the
A position where the restricting member 70 is not extrapolated to the elastically deforming portion when being worn
Can be fixedly held. A second example of the regulating member fixing means shown in FIG.
Is that the regulating member 70 extrapolates to the elastic deformation
In accordance with the position where the shape is regulated,
A locking portion 74 composed of a concave portion (or a convex portion) is provided on the peripheral portion.
Have been. The engaging portion 71 and the locking portion 74 are engaged with each other.
When the cover is completely attached, the endoscope end
While maintaining the engagement between the component and the tip cover member,
The control member 70 can be fixed to the distal end cover member 72. Further, the first example and the second example are combined.
At the same time, the locking portions 73,
74, the position before and after the movement of the regulating member 70 is reduced.
The positioning can be easily performed, and the regulating member 70 can be reliably moved.
be able to. Further, as shown in FIG. 49 and FIG.
A fall prevention member is provided separately to prevent the control member from falling.
You can also go. FIG. 49 shows a longitudinal section of the distal end of the insertion portion.
FIG. 50 is a sectional view taken along line E'-E 'of FIG. In this configuration example, the tip cover member 80
Outer peripheral portion on the proximal side from the portion where the regulating member 81 is located
A fall prevention member 82 is provided separately from the tip cover member 80.
It is fitted and fixed. In this way, the fall prevention member
82, the proximal end side of the insertion portion of the regulating member 81.
Can be restricted and the restriction member 81 can be prevented from falling off.
You. Incidentally, the falling-off prevention member 82 is provided at the tip cover portion.
Instead of the entire circumference of the material 80, as shown in FIG.
The effect of preventing falling off can be obtained by providing only in the portion. this
In this case, there is no dropout prevention member
Operation to deform the elastic deformation part or move the regulating member.
It keeps the operability good without getting in the way when you work
There are effects that you can In the above embodiment, the lens cover 19
Although the objective lens 17 is in close contact, the configuration of the optical system
Therefore, the gap with the cover is a gap of about 0.2 mm or less.
Can prevent flare, etc., so flare, etc. can be prevented.
In the range, the lens cover 19 and the objective lens 17 are directly
With the tip cover member around the lens cover without
A configuration in which the end surface of the tip component around the objective lens is brought into contact with
You may. In this case, the lens cover is in contact with the objective lens.
Since it does not touch, the occurrence of scratches on the optical component can be prevented. Also,
With lens cover and tip cover member or objective lens
Since the stress on the joint of the tip component is reduced, the lens cover
Of the lens and the objective lens can be prevented. According to the fifth to tenth embodiments,
An endoscope, and at least an interior covering the insertion portion of the endoscope.
An endoscope cover, wherein the endoscope cover is inserted with the endoscope.
Cover having a distal end cover member for fitting the distal end of the inlet portion
In the endoscope, the endoscope distal end portion is an endoscope insertion portion.
A locking portion having a slope inclined with respect to the longitudinal direction of the
The end cover member has one end connected to the end cover member.
Fixed to the body and extended in the longitudinal direction of the endoscope insertion section
The other end has an elastically deformable portion that is elastically deformable.
A slope portion which engages with the slope portion of the locking portion near the other end of the shape portion.
An engagement portion having a movable portion near the elastic deformation portion.
Regulating means for regulating the deformation of the elastic deformation portion
Between the endoscope distal end and the distal end cover member.
The fixed state between them can be reliably maintained. The present invention is not limited to the first to tenth embodiments.
Some elements are not limited to the examples (including the modified examples, etc.)
By omitting the simplified structure and the contents of each embodiment,
Naturally, it may be changed, or within the scope of the present invention.
Various modifications can be made. [Appendix] As described in detail above, the present invention
According to the aspect, the following configuration can be obtained.
That is, 1. An endoscope having an elongated insertion portion;
An endoscope cover for covering an insertion portion of the endoscope.
The endoscope cover is to be fitted with the tip of the insertion section of the endoscope.
In a cover-type endoscope having an end cover member,
The tip of the endoscope is inclined with respect to the longitudinal direction of the insertion section of the endoscope.
A locking portion having a slanted slope portion;
The material has one end fixed to the body of the tip cover member,
The other end of the endoscope extending in the longitudinal direction is elastically deformed.
Having an elastically deformable portion that can be formed, near the other end of the elastically deformable portion.
An engaging portion having a slope portion that engages with the slope portion of the locking portion;
The deformation of the elastic deformation portion is provided near the elastic deformation portion.
Regulating means for regulating, and a regulating means near the regulating means.
A regulation release means for releasing the regulation of the step is provided.
Cover type endoscope. Objective: Additions 1, 3, 3 ', 15, 23-44 are covers
Between the distal end of the medical endoscope and the distal end of the endoscope cover.
Can be securely held without causing any trouble
To provide a cover type endoscope. Purpose: Supplementary notes 1, 2, 2 ', 4 to 22 are endoscopes for covers
Of the distal end of the endoscope and the distal end cover of the endoscope cover
It is easy to perform the operation of fixing and releasing
Providing a cover-type endoscope that does not remove the endoscope cover even with external force
To do. According to the above configuration, the distal end portion of the endoscope for a cover
Between the endoscope cover and the tip of the endoscope cover.
Optical problems such as ghosts and flares
A cover-type endoscope that does not generate can be provided. Also for cover
Fixing the endoscope and endoscope cover at the distal end, and fixing
Removal is easy, operability is good, and unexpected
ー Even if it gets over the tip of the endoscope, the two will not come off
A cover-type endoscope can be provided. 2. Outside the regulation means as the regulation release means
And the second space where the elastic deformation portion is free to deform
A first space is provided for deforming the regulating means inward to create
47. The cover according to claim 1 or 46, wherein
Type endoscope. 2 '. The restricting means is movable near the elastic deformation portion.
2. The cover-type endoscope according to claim 1, wherein the cover-type endoscope is provided. 3. As the restriction release means, the deformation of the elastic deformation portion
Move the regulating means from the deformation area of the elastic deformation part to be free
The cover according to claim 1, wherein a space is provided for allowing the
-Endoscope. 3 '. The cylindrical member is an elastic member.
47. The cover-type endoscope according to item 47. 4. The first space is between the regulating means and the tip cover member.
The cover-type endoscope according to supplementary note 2, characterized in that it is provided in
mirror. 4 '. The space is a member constituting the endoscope cover.
It is characterized in that it is provided between a certain outer skin and the tip cover member.
3. The cover-type endoscope according to claim 3, wherein [0164] 5. The first space is provided with a regulating means and a tip cover.
-Characterized by being provided between the member and the tip component
3. The endoscope according to claim 2. Purpose: Space saving at the end of the endoscope cover. 5 '. The space has a size in which the regulating unit is located.
The cover-type endoscope according to Supplementary Notes 3, 6, and 12, wherein
mirror. 6. A pipe for performing air supply, water supply, and suction in the first space;
2. The method according to claim 2, wherein at least one is provided.
Cover type endoscope. Purpose: Space saving at the end of the endoscope cover. 7. The first space comprises one.
3. The endoscope according to claim 2. 8. The first space is composed of two spaces.
3. The endoscope according to claim 2. 9. That the first space is provided at an opposite position.
A cover-type endoscope according to attachment 8, wherein the endoscope is characterized in that: Purpose: To facilitate the operation of cylindrical members. 10. The deformed shape of the regulating means is a non-circular shape
2. The cover-type endoscope according to claim 2, wherein: 11. The deformation shape of the regulating means is elliptical.
2. The cover-type endoscope according to claim 2, wherein: Purpose: To facilitate the operation of cylindrical members. 12. The first space is a side surface not opposed to the elastically deformable portion.
The cover-type endoscope according to supplementary note 7, characterized in that the cover-type endoscope is provided in
mirror. 13. The first space has a tip cover with respect to the elastic deformation portion.
-In the direction rotated at right angles from the center of the member
The cover according to Supplementary Notes 9 and 12, wherein the cover is provided.
Type endoscope. Purpose: To facilitate the operation of cylindrical members. 13 '. The engaging portion provided on the elastic deformation portion is the outer skin.
The elastic force of the above and said regulating means
Press the locking part to urge the endoscope end to the cover end
14. The cover-type endoscope according to supplementary note 13, wherein 14． At least the second space is deformed by the elastic deformation portion.
Large enough to disengage the locking part and the engaging part
2. The cover-type endoscope according to claim 2, wherein
mirror. 15. Radial size of locking part and engaging part
Is from 0.3 to 0.5 mm.
Cover type endoscope. 16. The size of the second space is small in the radial direction at the maximum width.
Supplementary note 14 characterized by being at least 0.3 mm or more.
The cover type endoscope according to the above. 17． The first space is formed by cutting the tip cover member into an arc shape.
In the cover type described in Supplementary Note 4, characterized in that the cover type is provided.
Endoscope. 18. The first space extends from a tip cover member to a tip component.
Characterized by being cut out in an arc shape over
6. The endoscope according to claim 5. Purpose: To facilitate the operation of cylindrical members. 19. The first space is formed by cutting the tip cover member in a straight line.
In the cover type described in Supplementary Note 4, characterized in that the cover type is provided.
Endoscope. 20. Is the first space a tip cover member?
That it was notched linearly from
A cover-type endoscope according to Supplementary Note 5 characterized by the above-mentioned. 21. The first space has the regulating means in the first space inward.
When deformed, the restricting means that satisfies Appendix 14 will move outward.
The cover according to Supplementary Note 2, wherein the cover has a size to be formed.
-Endoscope. 22. The first space has at least a maximum radial width.
The cover according to Supplementary Note 21, wherein the cover is 0.3 mm or more.
-Endoscope. 23. The regulating means is separate from the tip cover member.
2. The cover-type endoscope according to claim 1, wherein 24. The regulating means is provided integrally with the tip cover member.
2. The cover-type endoscope according to claim 1, wherein: Purpose: Cylindrical member deforms outward only near the outside of the elastic deformation part
Shaping. 25. The cylindrical member is a metal pipe
4. The cover-type endoscope according to claim 3, wherein: 26. The metal pipe is made of stainless steel
25. The cover-type endoscope according to Supplementary Note 25. 27. The metal pipe is made of spring steel.
25. The cover-type endoscope according to Supplementary Note 25. Purpose: more solid bullet
To cover the sexually deformed part. 28. The wall thickness of the stainless steel metal pipe is 0.15
26. The power according to claim 26, wherein
Bar endoscope. 29. The length of the stainless steel metal pipe is 2
The cover type described in Supplementary Note 26, wherein the length is about 4 mm.
Endoscope. 30. The cylindrical member is made of resin
4. The cover-type endoscope according to claim 3, wherein: 31. The cylindrical member is made of polycarbonate
30. The cover-type endoscope according to attachment 30, wherein: 32. The cylindrical member is made of acrylic,
33. The cover-type endoscope according to attachment 31. 33. The regulating means and the tip cover member are
27. The cover according to claim 24, wherein the cover is adhered at a portion.
-Endoscope. Purpose: Cylindrical member deforms outward only near the outside of the elastic deformation part
Shaping. 34. The regulating means and the tip cover member are integrally formed.
25. The cover-type endoscope according to supplementary note 24, wherein: Purpose: Cylindrical member deforms outward only near the outside of the elastic deformation part
Shaping. 35. The regulating means and the tip cover member are
27. The cover according to claim 24, wherein the cover is welded at the portion.
-Endoscope. Purpose: Cylindrical member deforms outward only near the outside of the elastic deformation part
Shaping. 36. The engagement portion provided in the elastic deformation portion is a cylindrical portion
Presses the locking part engaged with the slope by the elastic force of the material
And biasing the tip component toward the tip.
3. The cover-type endoscope according to Supplementary Note 1 or 3 ′. Purpose: The engaging part and the locking part engage more firmly,
Fix the front end component and the front cover member. 37. The locking portion is configured by a convex portion, and the engaging portion is
The power according to claim 1 characterized by being constituted by a convex portion.
Bar endoscope. 38. The locking portion is a concave portion, and the engaging portion is a convex portion.
In the cover type described in Supplementary Note 1,
Endoscope. 39. The locking portion is a convex portion, and the engaging portion is a concave portion.
In the cover type described in Supplementary Note 1,
Endoscope. 40. Inserted into the insertion portion proximal end side of the engagement portion
Featured on an inclined surface that is inclined with respect to the longitudinal direction of the part
37. The cover-type endoscope according to supplementary notes 37 and 38. Purpose: To facilitate insertion of the tip component into the tip cover member
thing. 41. At the proximal end of the insertion section,
Supplementary note 37 and Supplementary note 39, characterized in that inclined planes are provided.
The cover type endoscope according to the above. Purpose: To facilitate insertion of the tip component into the tip cover member
thing. 42. One locking part, one engaging part and one elastic deformation part
2. The cover-type endoscope according to claim 1, wherein: Purpose: Tip the tip part more firmly to avoid rattling
To be locked to the end cover member. 43. A plurality of locking parts, engaging parts and elastic deformation parts are provided
2. The cover-type endoscope according to claim 1, wherein: 44. Insertion length on the inner surface on the proximal end side of the insertion portion of the elastic deformation portion
It is characterized by having an inclined surface inclined to the hand direction.
39. The cover-type endoscope according to attachment 39. Purpose: To facilitate insertion of the tip component into the tip cover member
thing. 45. An engaging portion provided on the elastic deformation portion
Is engaged at the slope by the elastic force of the elastically deforming portion.
Press the locking part, and place the endoscope tip on the cover tip side
The cover-type endoscope according to supplementary note 1, wherein the cover-type endoscope is biased toward
mirror. In this configuration, the distal end portion of the endoscope is
Both are fixed in a state of contact or close enough to
Therefore, occurrence of flare and the like can be prevented. 46. The restricting means includes a tip cover including the elastic deformation portion.
-Supplementary note 1 consisting of a regulating member fitted to the outer surface of the member
Cover type endoscope. 47. The restricting means includes a tip cover including the elastic deformation portion.
46. The supplementary note 46, comprising a cylindrical member extrapolated to the member.
Cover type endoscope. 48. The cylindrical member has a large deformation area of the elastic deformation portion.
It has a cutout part with a part cut out to a size larger than the size,
When attaching / detaching the endoscope distal end portion and the distal end cover member,
The notch is located at a position including the deformation area of the elastic deformation part.
48. The cover-type endoscope according to attachment 47, further comprising: 49. The cylindrical member includes the endoscope cover.
The contact surface with the outer skin which is one of the components
47. A cover according to claim 47, wherein the outer peripheral portion is formed in a polygonal shape.
-Endoscope. 50. Inserted into the inner surface of the insertion portion at the distal end side in the regulating means
Supplementary note 46 provided with an inclined surface inclined with respect to the longitudinal direction of the part
Cover type endoscope. 51. Inserted into the outer surface of the elastic deformation portion at the proximal end side of the insertion portion
Supplementary note 46 provided with an inclined surface inclined with respect to the longitudinal direction of the entrance.
The cover type endoscope according to the above. With the configuration of Supplementary Notes 49 to 51
In this case, the movement operation of the regulating means is facilitated. 52. The regulating means is inserted in a deformation area of the elastic deformation portion.
Regulating member, and attaching the regulating member to the elastic deformation portion.
2. A cover-type endoscope according to claim 1, comprising a biasing biasing member.
mirror. 53. The urging member is an outer member constituting the endoscope cover.
53. The cover-type endoscope according to attachment 52, wherein the endoscope is made of leather. 54. The regulating member is a flat member.
53. A cover-type endoscope according to attachment 52. 55. The restricting member has an arc-shaped section.
53. The cover-type endoscope according to paragraph 52. 56. The engagement portion is movable separately from the elastic deformation portion.
Is provided in the endoscope distal end portion and the distal end cover member.
At the time of attachment / detachment, to the position where the engaging part does not engage with the locking part
2. The cover-type endoscope according to claim 1, wherein the cover-type endoscope is disposed.
mirror. 57. The elastically deformable portion inserts the engagement portion into the endoscope.
Appendix 1 can be deformed to move in the radial direction of the part
Cover type endoscope. 58. The elastically deformable portion inserts the engagement portion into the endoscope.
Appendix 1 can be deformed to move in the circumferential direction of the part
Cover type endoscope. 59. The restricting means is provided for the elastic deformation portion.
The elastic deformation portion fits into the deformation area and holds the elastic deformation portion.
Having a fitting part provided near the shape part and the engaging part,
Supplementary note consisting of a regulating member extrapolated to the tip cover member
58. The cover-type endoscope according to 58. 60. The regulating means fits into the elastic deformation portion and
The elastic deformation portion and the engagement portion are configured to hold the deformation portion.
The front cover member has a fitting concave portion provided in the vicinity.
The inside of the cover type described in Supplementary Note 58 consisting of a regulating member to be extrapolated
Endoscope. 61. An engaging projection is provided on the outer peripheral surface of the tip cover member.
An engagement recess engaging with the projection on the inner surface of the regulating member.
53. The cover-type endoscope according to attachment 46 or 52, further comprising a portion. 62. Engage with the outer peripheral surface of the tip cover member
A concave portion for engaging the concave portion on the inner surface of the regulating member.
53. The cover according to Supplementary Note 46 or 52, wherein the cover has a projection for engagement.
Type endoscope. In the configuration of Supplementary Note 61 or 62,
It is possible to prevent falling off and to position the regulating member, which improves operability.
Is improved. 63. The regulating member is moved in the longitudinal direction of the endoscope insertion portion.
53. A cover-type endoscope according to appendix 46 or 52, which is movable.
mirror. 64. The regulating member moves in a circumferential direction of the endoscope insertion portion.
55. The cover-type endoscope according to attachment 48 or 55, wherein the endoscope is capable of being used. 65. The elastic deformation portion has an outer diameter of a peripheral tip cover member.
The power of claim 1 formed in an arc shape having the same outer diameter as
Bar endoscope. 66. The restricting means always controls the deformation area of the elastic deformation portion.
If at least a part of the elastic deformation portion is
Or the entire endoscope is restricted,
Deformation area of the elastic deformation part only when it is removed from the cover member
Cover type according to attachment 65, further comprising a regulating member that moves more.
Endoscope. In the configuration of Supplementary note 65 or 66, the endoscope cover
The mounting and dismounting operation can be performed with light force, and the work of attaching and detaching the cover
It will be easier. 67. An inclined surface provided on a surface where the engaging portion and the locking portion engage.
The angle of the other inclined surface is smaller than the angle of the surface.
45. A cover-type endoscope according to any one of notes 40 to 44
mirror. 68. The endoscope tip is attached to the tip cover member.
With the end portions engaged, the distal end outer peripheral portion of the endoscope distal end portion
Endoscope so that the inner peripheral surface of the tip cover member abuts on the endoscope.
The projecting portion for supporting the distal end of the insertion portion is
2. The cover-type endoscope according to claim 1, wherein the cover-type endoscope is provided on an inner peripheral portion of the material. Note
In the configuration of 67 or 68, the endoscope distal end portion and the distal end cover portion
The rattling with the material can be eliminated, and the two can be securely fixed.
Can be done. 69. The endoscope tip is attached to the tip cover member.
With the end portions engaged, the distal end outer peripheral portion of the endoscope distal end portion
Endoscope so that the inner peripheral surface of the tip cover member abuts on the endoscope.
The projecting portion for supporting the distal end of the insertion portion is provided at the distal end of the endoscope.
2. The cover-type endoscope according to claim 1, wherein the cover-type endoscope is provided on an outer peripheral portion of the endoscope. 70. An endoscope having an elongated insertion portion, at least
An endoscope cover that covers an insertion portion of the endoscope,
The endoscope cover is fitted over the distal end of the insertion section of the endoscope.
In a cover type endoscope having a distal end cover member,
A locking portion formed at a distal end portion of the endoscope; and the distal end cover portion
The material has one end fixed to the body of the tip cover member,
The other end of the endoscope extending in the longitudinal direction is elastically deformed.
Having an elastically deformable portion that can be formed, near the other end of the elastically deformable portion.
An engaging portion that engages with the locking portion;
In the vicinity, regulating means for regulating the deformation of the elastically deforming portion,
In the vicinity of the restriction means, there is a restriction for releasing the restriction of the restriction means.
A cover-type endoscope comprising a release means. Purpose: The end component of the endoscope endoscope cover and the endoscope cover
-Fix and release the tip with the tip cover member.
Easy to perform and the endoscope cover does not come off under unexpected external force
To provide a cover type endoscope. According to the above configuration, the distal end of the cover endoscope and the endoscope camera
It can be easily fixed and released from the bar tip,
Operability is good, and unexpected force is applied to the end of the cover type endoscope.
Cover endoscope that does not come off even when
Can be provided. [0180] As described above, according to the present invention,, Mosquito
Between the tip of the bar endoscope and the tip of the endoscope cover
The fixed state can be reliably maintained, and there is no play,
Providing a cover-type endoscope that does not cause optical problems such as rare
it can. Also, the tip of the cover endoscope and the endoscope cover
Easy to fix and release at the part, good operability
And unexpected force is applied to the tip of the cover-type endoscope.
To provide a cover-type endoscope that does not come off
Can be.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing the entire configuration of a cover type endoscope. FIG. 2 is a longitudinal sectional view showing a configuration of a distal end side of an insertion portion of the cover type endoscope according to the first embodiment of the present invention. FIG. 3 is a sectional view taken along line AA of FIG. 2; FIG. 4 is a sectional view taken along line BB of FIG. 3; FIG. 5 is a longitudinal cross-sectional view showing a state in the middle of inserting the insertion portion of the cover endoscope into the endoscope cover. FIG. 6 is a sectional view taken along line CC of FIG. 5; FIG. 7 is a longitudinal cross-sectional view showing a state in which the insertion portion of the endoscope for a cover is further inserted into the endoscope cover than in FIG. 5; FIG. 8 is a sectional view taken along line DD of FIG. 7; FIG. 9 is a longitudinal sectional view showing a state in which the insertion portion of the endoscope for a cover is further inserted into the endoscope cover than in FIG. 7 and the engagement portion and the engagement portion are engaged. FIG. 10 is a sectional view taken along line EE of FIG. 9; FIG. 11 is a longitudinal sectional view showing the configuration of the distal end side of the insertion portion of the cover-type endoscope according to a first modification of the first embodiment. FIG. 12 is a cross-sectional view showing a configuration of a distal end side of an insertion portion of a cover-type endoscope according to a second modification of the first embodiment and a cross-section taken along line FF. FIG. 13 is a perspective view showing an insertion portion of a cover-type endoscope according to a third modification of the first embodiment. FIG. 14 is a radial cross-sectional view showing the configuration of the distal end side of the insertion section of the cover-type endoscope according to a fourth modification of the first embodiment. FIG. 15 is a radial cross-sectional view showing the configuration of the distal end side of the insertion section of the cover-type endoscope according to the second embodiment of the present invention. FIG. 16 is a sectional view for explaining the operation of FIG. 15; FIG. 17 is a sectional view for explaining an operation in a modification of the second embodiment. FIG. 18 is a longitudinal sectional view showing a configuration of a distal end side of an insertion portion of a cover-type endoscope according to a third embodiment of the present invention. FIG. 19 is a sectional view taken along line GG of FIG. 18; FIG. 20 is a longitudinal sectional view of the cover-type endoscope according to the third embodiment in a state where a notch on the distal end side of an insertion portion is pressed. FIG. 21 is a sectional view taken along line HH of FIG. 20; FIG. 22 is a radial cross-sectional view showing the configuration of the distal end side of the insertion section of the cover-type endoscope according to the fourth embodiment of the present invention. FIG. 23 is a radial cross-sectional view showing the cross-sectional shape of the distal end side of the insertion portion when the notch is pressed in FIG. 22; FIG. 24 is a longitudinal sectional view showing a configuration of a part of the distal end side of an insertion portion of a cover-type endoscope according to a modified example such as the fourth embodiment. FIG. 25 is a longitudinal sectional view showing a configuration of a part of the distal end side of an insertion portion of a cover-type endoscope according to a modified example such as the fourth embodiment. FIG. 26 is a perspective view showing the overall configuration of a cover-type endoscope according to a fifth embodiment of the present invention. FIG. 27 is a longitudinal sectional view showing a detailed configuration of a distal end portion of an insertion portion of a cover-type endoscope according to a fifth embodiment. FIG. 28 is a sectional view taken along line A′-A ′ of FIG. 27; FIG. 29 is a longitudinal sectional view showing a state in the middle of inserting the endoscope insertion portion into the endoscope cover according to the fifth embodiment. 30 is a radial cross-sectional view of a modified example of the configuration of the cylindrical member shown in FIG. 28. FIG. 31 is a longitudinal sectional view showing a detailed configuration of a distal end portion of an insertion portion of a cover-type endoscope according to a sixth embodiment of the present invention. FIG. 32 is a sectional view taken along the line B′-B ′ of FIG. 31; FIG. 33 is a longitudinal sectional view showing a state in the middle of inserting the endoscope insertion portion into the endoscope cover according to the sixth embodiment. FIG. 34 is a sectional view taken along line C′-C ′ of FIG. 33; FIG. 35 is a longitudinal sectional view showing a detailed configuration of a distal end portion of an insertion portion of a cover-type endoscope according to a seventh embodiment of the present invention. FIG. 36 is a sectional view taken along line D′-D ′ of FIG. 35; FIG. 37 is a longitudinal sectional view showing a state in the middle of inserting the endoscope insertion portion into the endoscope cover according to the seventh embodiment. FIG. 38 is a longitudinal sectional view showing a detailed configuration of a distal end portion of an insertion portion of a cover-type endoscope according to an eighth embodiment of the present invention. FIG. 39 is a longitudinal sectional view showing a state in the middle of inserting an endoscope insertion section into the endoscope cover according to the eighth embodiment. FIG. 40 is a longitudinal sectional view showing a state in the middle of removing the endoscope insertion portion from the endoscope cover according to the eighth embodiment. FIG. 41 is a longitudinal sectional view showing a detailed configuration of a distal end portion of an insertion portion of a cover-type endoscope according to a ninth embodiment of the present invention. FIG. 42 is a longitudinal sectional view showing a state when an endoscope insertion portion is inserted into an endoscope cover according to a ninth embodiment. 43 is an enlarged cross-sectional view showing a portion of a fixing pin of the elastic deformation portion shown in FIG. 42; FIG. 44 is a perspective view showing a configuration of a distal end portion and a distal end cover member of a cover type endoscope according to a tenth embodiment of the present invention. FIG. 45 is a radial cross-sectional view of the insertion portion in a state where the distal end component and the distal end cover member of FIG. 44 are engaged. FIG. 46 is a perspective view showing a state where the distal end component and the distal end cover member according to the tenth embodiment are being engaged. FIG. 47 is a longitudinal sectional view of an insertion portion showing a first example of a regulating member fixing means. FIG. 48 is a longitudinal sectional view of an insertion portion showing a second example of the regulating member fixing means. FIG. 49 is a longitudinal sectional view of the insertion portion showing an example in which a stopper member of the regulating member is provided separately. FIG. 50 is a sectional view taken along the line E′-E ′ of FIG. 49; [Description of Signs] 1 ... Cover type endoscope 2 ... Endoscope for cover 3 ... Insertion section (endoscope insertion section) ... Tip cover member 12... Elastic deformation portion 13... Engaging portions 13 a, 14 a.

Claims (1)

(57) [Claim 1] An endoscope having an elongated insertion portion, and an endoscope cover for covering at least the insertion portion of the endoscope, wherein the endoscope cover is In a cover-type endoscope having a distal end cover member fitted with a distal end portion of the insertion portion of the endoscope, formed at a distal end portion of the endoscope, with respect to a longitudinal direction of the insertion portion of the endoscope. A locking portion having a slanted slope portion , and the other end formed on the distal end cover member , one end of which is fixed to the main body of the distal end cover member and extends in the longitudinal direction of the insertion portion of the endoscope. an elastically deformable elastic deformation portion, which is formed on the elastic deformation portion, and the engaging portion and a slope portion that engages the inclined surface of the locking portion, disposed outside the elastic deformation portion , Shaped into the elastic deformation part
The formed slope portion of the engaging portion and the end portion of the endoscope are shaped.
Regulating means for regulating the deformation of the elastic deformation portion so as to maintain the engaged state with the inclined surface of the locking portion; and the elastic deformation provided outside the regulating means. Part shaped
The formed slope portion of the engaging portion and the end portion of the endoscope are shaped.
The engaged state of the engaging portion with the slope portion is released.
Cover endoscope, characterized in that cormorants equipped with a restriction releasing means for releasing the restriction of the regulating means.