JPH1099260A - Endoscope device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate replacement work by replacing only the top end part and no requiring the focus adjustment of an optics replaced when the optics of the top end of an endoscope is broken by an external impact. SOLUTION: When a screw member 35 is screwed, an insulating member 32, an optical frame member 31a, and a spacer 33 which are fixed to a second optical frame member 25 in one body are attached to a first optical frame member 24 and pressed against a first optical member 29. In a top end body 16a, the first optical frame member 24 is gripped between a top end cover 37 and the second optical frame member 25. A side hole 39 is filled with a filler.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an endoscope, and more particularly to an endoscope characterized by a connection portion of an optical member exposed to the outside from a distal end portion.

[0002]

2. Description of the Related Art In recent years, endoscopes that can be inserted into a body cavity to observe or treat an affected part have been widely used.
In such an endoscope, an illumination light transmitting means such as a light guide fiber bundle for transmitting illumination light for irradiating the affected part and an image transmitting means for transmitting an image of the affected part are inserted into the elongated insertion portion. Have been.

The image transmitting means includes a relay lens, an image guide fiber bundle, and the like, and transmits an observation image of the affected part to an eyepiece provided at a base end of the endoscope so that an operator can observe the affected part. I can do it. Recently, a solid-state image sensor, for example, a CCD or the like, is arranged as an image transmission means in the distal end portion of the insertion section, an observation image of an affected part is taken and output as an electric signal, and the electric signal is processed to be a monitor or the like. Electronic endoscopes, which can display an image of an affected part, have also become widespread.

In these endoscopes for observing an image of an affected part with an eyepiece or an electronic endoscope for taking an image of an affected part with a CCD or the like, an incident end face of a relay lens or an image guide fiber bundle, or an imaging surface of a CCD. An objective optical system for forming an image of the affected area is provided at the distal end of the insertion section.

Since this objective optical system is exposed at the distal end of the insertion portion, it is easily damaged by external force or the like. Therefore, for example, Japanese Unexamined Utility Model Publication No. Sho 62-96617 and Japanese Unexamined Patent Publication No. Hei 6-1541.
As shown in No. 63, there has been proposed an endoscope in which an optical member frame for supporting an objective optical system can be detachably attached to a distal end of an insertion portion.

[0006]

However, Japanese Unexamined Utility Model Publication No. Sho 62-96617 and Japanese Unexamined Patent Publication No. Hei 6-15416 disclose the above.
In the endoscope shown in No. 3, the optical frame member for attaching the optical member exposed to the outside is configured to be detachable from the distal end component, so that the optical member exposed to the outside, Are optically positioned via the distal end component. For this reason, there is a problem that the processing tolerance of the distal end component is added to the distance between the optical members and the like. Therefore, there is a problem that high-precision processing is required for the distal end component, and the distal end component becomes expensive.

Further, when an optical member exposed to the outside is damaged, the optical member and the optical frame member to which the optical member is attached are exchanged. At this time, the optical frame member is also exchanged. However, in the above-described related art, since the distance between the optical members is determined by the combination of the optical frame member and the distal end component, there is also a problem that the focus adjustment of the optical member group is required again.

The present invention has been made in view of the above circumstances, and when an optical member at the distal end portion of an endoscope is damaged by an external impact or the like, repair can be performed by replacing only the most distal end portion. It is another object of the present invention to provide an endoscope that does not require focus adjustment of an optical member at the time of repair and can easily perform a replacement operation.

[0009]

An endoscope according to the present invention is provided with an optical system comprising a plurality of optical members and an optical frame member for mounting the optical system in a watertight manner at a distal end portion. In the endoscope, the plurality of optical members are attached to a plurality of optical frame members, and the plurality of optical frame members adhere and fix the first optical member exposed to the outside of the distal end component at least in a watertight manner. A first optical frame member attached to the first optical frame member, and a second optical frame member attached to a second optical member that is not attached to the first optical frame member. And the second optical frame member are fitted to each other, and the first optical frame member is configured to be detachable from the second optical frame member.

In the endoscope according to the present invention, the first optical frame member and the second optical frame member are fitted to each other, and the first optical frame member is detachably attached to the second optical frame member. If the optical member at the distal end of the endoscope is damaged by external impact, etc., it can be repaired by replacing only the tip, and there is no need to adjust the focus of the optical member at the time of repair Thus, the replacement operation can be easily performed.

[0011]

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

FIGS. 1 to 5 relate to a first embodiment of the present invention. FIG. 1 is a configuration diagram showing a configuration of an endoscope apparatus provided with an endoscope, and FIG. 2 is an endoscope of FIG. Perspective view showing the appearance of
FIG. 3 is a cross-sectional view showing a cross-sectional configuration of the distal end component in FIG.
FIG. 5 is a first explanatory view for explaining the assembling of the first optical frame member and the second optical frame member of FIG. 3, and FIG. 5 is a diagram illustrating the assembly of the first optical frame member and the second optical frame member of FIG. It is a 2nd explanatory view explaining assembly.

As shown in FIG. 1, an electronic endoscope 1 according to the present embodiment includes a solid-state image pickup device (not shown) that is inserted into a body cavity and captures an image of a diseased part, for example, an insertion portion 2 having a CCD at its tip. An operation unit 3 connected to the proximal end of the insertion unit 2 and held by an inspector for performing various operations; and an operation unit 3
, A connector 5 provided at the end of the universal cord 4 is connected to a light source device 6, and a signal code 7 branched from the connector is connected to a camera control unit (hereinafter referred to as CC).
U) 8).

In the light source device 6, the illumination light supplied by the lamp 9 is converted by the condenser lens 10 into the universal cord 4.
By condensing the light on the incident surface of the light guide 11 inserted through the inside of the insertion section 2, the illumination light is transmitted to the distal end of the insertion section by the light guide 11 and illuminates an affected part (not shown). The illuminated image of the affected area is captured by a CCD, and the captured signal is transmitted to the CCU 9 that performs various signal processings via the insertion section 2, the universal code 4, and the signal code 7. I have. The CCU 9 includes a monitor 12 for displaying an image of the affected part, a VTR deck 13 for recording the image, and a video printer 14.
And the video disk 15, respectively, so that an image of the affected part can be observed and recorded.

As shown in FIG. 2, the insertion portion 2 has a configuration in which a distal end forming portion 16, a bending portion 17 for directing the distal end forming portion 16 upward, downward, leftward and rightward, and a soft flexible tube 18 are continuously provided from the distal end. Has become. The operating section 3 includes a bending section 17.
The vertical bending operation knob 19a, the vertical bending braking lever 19b, the left / right bending operation knob 19c, the left / right bending braking lever 19d, and the air supply channel and the distal end configuration portion 16 that pass through the insertion section 2 (not shown). A gas supply button 20 for controlling a gas supply function provided by a gas supply nozzle provided, a suction button 21 for controlling a suction function by a suction channel inserted through the insertion section 2 (not shown);
A switch 22 for remotely controlling a video recording function of the R deck 13 and the like and a light amount adjustment of the light source device 6 is provided. The suction channel that passes through the insertion section 2 is
Is connected to the treatment tool base 2a provided on the base end side, and a treatment tool (not shown) is inserted through the suction channel from the treatment tool base 2a, and protrudes from the distal end component portion 16. Various treatments and treatments can be performed on the affected part.

As shown in FIG. 3, a cylindrical through hole 23 is formed in the distal end body 16a constituting the distal end forming portion 16, and a first optical frame member 24 is formed in the through hole 23. And a second optical frame member 25 and a plurality of optical members attached thereto are arranged, one end of the optical member is exposed to the outside at the tip end, and the other end is a solid-state imaging device such as CC
D27.

The first optical frame member 24 has an observation window 28 located at the outermost position of the optical member, and the first optical member 2
9 is hermetically attached. Also, the first optical frame member 24
Is formed so that the outer diameter becomes small at a part on the tip side. The other end, which is not formed with a small outer diameter, has a first end.
A cylindrical portion 24a (see FIG. 4) is formed, a groove is formed on the outer peripheral surface of the first cylindrical portion 24a, and an elastic ring 30 is disposed here.

The second optical frame member 25 includes a second optical member 31 composed of a plurality of optical members, an optical frame member 31a for directly attaching the second optical member 31, and an insulating member composed of ceramics or the like. 32 and a spacer 33 disposed between the optical members. A second cylindrical portion 25a (see FIG. 4) is formed on the distal end side of the second optical frame member 25, and the outer diameter of the second cylindrical portion 25a is equal to the first cylindrical portion 24.
It has a fitting dimension with the inner diameter of a. In addition, one end of the second optical frame member 25 where the second cylindrical portion 25a is not formed has an outer diameter fitted to the inner diameter of the through hole 23.

The second optical member 31 is fixed to the optical frame member 31a by attachment and bonding, and the spacer 33 is fixed to the optical frame member 31a by bonding and the like.

On the other hand, the tip body 16a of the tip component 16
A screw member 35 is screwed toward the through hole 23, and the tip of the screw member 35 projects into the through hole 23. A V-shaped groove 36 is formed on the outer peripheral surface of the second optical frame member 25 at a position where the tip of the screw member 35 projects into the through hole 23. Where
The screw member 35 is disposed at the position of the tip main body 16a such that the top abuts on the slope on the first optical member 29 side of the two slopes of the V-shaped groove 36.

A distal end cover 37 is fixed to the distal end of the distal end body 16a by an adhesive or the like with an insulating material such as resin, and has the same center as the through hole 23, and is provided outside the distal end cover 37. A hole having a diameter smaller than the diameter is opened, and a flange 38 is formed therefrom. In addition, the distal end of the first optical frame member 24 is formed to have a small outer diameter in part.
This outer diameter is smaller than the inner diameter of the hole in the flange 38.

At the side wall of the tip cover 37 and at the same position as the screw member 35 provided on the tip body 16a, a side hole 39 which is a through hole having an inner diameter larger than the outer diameter of the screw member 35 is provided. Have been. In the product state, the side holes 39
Is filled with a filler such as silicon in a watertight manner.

Next, the operation of the present embodiment configured as described above will be described.

As shown in FIG. 4, the first optical frame member 24
Are combined with the second optical frame member 25 without displacement of the center axis by fitting the inner peripheral surface of the first cylindrical portion 24a and the outer peripheral surface of the second cylindrical portion 25a.

When the second optical frame member 25 is inserted into the first optical frame member 24, the tip of the spacer 33 fixed to the second optical frame member 25 is moved to the first optical frame member 24. To the first optical member 29 attached to the first optical member 29. here,
The distance when the first optical member 29 and the second optical member 31 are combined is determined by the spacer 33.

When the first optical frame member 24 and the second optical frame member 25 are inserted into the through holes 23 provided in the distal end body 16a, the outer peripheral surface of the second optical frame member 25 and the through holes 23 The inner peripheral surfaces of the first optical frame member 24 and the second
(The outer peripheral surface of the first optical frame member 24 is attached to the inner peripheral surface of the through-hole 23, and the elastic ring 3).
0 is only due to the elastic force).

The step formed by the small outer diameter portion provided on the distal end side of the first optical frame member 24 abuts on the flange 38 from the through hole 23 side.

Next, when the screw member 35 is screwed into the tip end body 16a through the side hole 39, as shown in FIG. 5, the screw member 35 moves the front inclined surface of the V-shaped groove portion 36 in the direction of arrow B. Press At this time, the second optical frame member 25 cannot be moved in the direction B because it is fitted in the through hole 23,
It moves in the A direction.

That is, the insulating member 32, the optical frame member 31 a, and the spacer 33 integrally fixed to the second optical frame member 25 are attached to the first optical frame member 24 according to the screwing of the screw member 35. Then, it is pressed against the first optical member 29. Thereby, the first optical frame member 24 is sandwiched between the distal end cover 37 and the second optical frame member 25 with respect to the distal end body 16a. Then, the side holes 39 are closed by the filler.

Conversely, when the filler in the side hole 39 is broken and the screw member 35 is removed with a driver or the like, the second optical frame member 2 is removed.
5 can be taken out rearward from the through hole 23 formed in the tip end body 16a.

The first optical frame member 24 can be taken out from the through hole 23 by pushing it in from the front of the front cover 37.

As described above, in the present embodiment, the observation window 28
Is damaged by impact or the like, the second optical frame member 25 and the first optical frame member 24 are taken out, and a new first optical frame member 24 and the first optical member 29 attached thereto are removed. Second
Replacement and repair is possible only by fitting the optical frame member 25 to the optical frame member 25.

Further, since the first optical member 29 and the second optical member 31 have the spacer 33 directly in contact with the optical member, the distance between the optical members can be determined, and the new first optical member 29 and the second optical member 31 can be determined. The influence of the dimensional tolerance on the part processing by the frame member 24 is small.

Further, the second optical member 31 is a CCD 27
And the entire focus adjustment including the first optical member 29 is completed at the time of assembly. Therefore, focus adjustment at the time of repair and replacement is not required, and the replacement operation is simple. 6 and 7 relate to a second embodiment of the present invention. FIG. 6 is a cross-sectional view showing a cross-sectional configuration of a distal end component, and FIG. 7 is a diagram showing a first optical frame member of FIG. FIG. 4 is an explanatory diagram for explaining a method of rotating the center axis with respect to the center axis.

Since the second embodiment is almost the same as the first embodiment, only different points will be described, and the same components will be denoted by the same reference numerals and description thereof will be omitted.

As shown in FIG. 6, in the present embodiment, a step portion 51 is formed at a portion where the inner diameter of the through hole 23 is different, and the step portion 51 is provided with the second optical frame member 25. The step portion where the second cylindrical portion 25a is formed abuts.

As in the first embodiment, a V-shaped groove 36 is formed on the outer peripheral surface of the optical frame member 25, and a screw member 35 screwed to the distal end body 16a is formed in the V-shaped groove. 3
The second optical frame member 25 is held between the stepped portion 51 and the front side inclined surface 6 by pressing.

The first optical frame member 24 has a second
Similarly to the optical frame member 25, a V-shaped groove portion 36 is provided.

A screw member 35 is screwed into a tip end main body 34 where the top abuts on the rear slope of the V-shaped groove 36 provided in the first optical frame member 24.

The outer periphery of the distal end body 34 in which the screw member 35 is disposed, which is in contact with the V-shaped groove 36 formed in the second optical frame member 25, is covered with an extensible curved clothing rubber. .

The side wall of the tip cover 37 is fixed to the outer peripheral surface of the screw member 35 on which the screw member 35 is provided, which is in contact with the V-shaped groove 36 formed in the first optical frame member 24. A side hole 39 is formed at the position of the screw member 35. The side hole 39 is in a product state.
A filler made of silicon or the like is provided in a watertight manner.

The end cover 37 has the same center as the through hole 23 and has a through hole which has the same diameter as the through hole 23 or a diameter larger than the through hole 23.

The outer circumference of the first optical frame member 24 has the same diameter over the entire length, and at least two
A plurality of concave portions 52 are formed.

The other structure is the same as that of the first embodiment.

Next, the operation of the present embodiment thus configured will be described.

The first optical frame member 24 and the second optical frame member 25 are formed by the inner peripheral surface of the first cylindrical portion 24a and the second cylindrical portion 25.
a The outer peripheral surface is fitted.

The first optical frame member 24 and the second optical frame member 25 are integrally inserted from the rear of the through hole 23, and are formed on the outer peripheral surface of the second optical frame member 25 and the inner peripheral surface of the through hole 23. It is attached coaxially with the through hole 23 by fitting.

Next, the second optical frame member 25 abuts on the step portion 51 by screwing the screw member 35, and is held between the tip end body 16a.

The first optical frame member 24 is provided on the outer peripheral surface of the first optical frame member 24 by screwing the other screw member 35 in reverse to the second optical frame member 25. Pressing the rear slope of the V-shaped groove 36 acts to move the first optical frame member 24 rearward.

Thus, the first optical frame member 24 is fixed to the second optical frame member 25 to which the spacer 33 is fixed by the contact between the first optical member 29 and the spacer 33.

The second optical frame member 25 is fixed to the distal end body 16a by the screw member 35, and accordingly, the first optical frame member 25
The optical frame member 24 is fixed to the distal end portion main body 16a.

Conversely, when the filler in the side hole 39 is broken and the screw member 35 is removed with a driver or the like, the first optical frame member 2 is removed.
4 can be removed in a forward direction from the through hole 23.

The first optical frame member 24 can be inserted into the through-hole 23 through the through-hole opened in the front-end cover 37 from the front of the front-end cover 37. By screwing the screw member 35 with the
The optical frame member 24 can be fixed to the distal end body 16a.

Further, as shown in FIG. 7, a first optical frame member 2 is formed by using a tool 53 having a convex portion engaging with the concave portion 52.
4 can be rotated with respect to the center axis of the second optical member 31, so that the deviation of the observation range due to an error in the combination of the first optical member 29 with the second optical member 31 can be easily adjusted.

Other operations are the same as those of the first embodiment.

As described above, in this embodiment, in addition to the effects of the first embodiment, when the observation window 28 is damaged by impact or the like, the first optical frame member 24 is moved forward of the front cover 37. Can be replaced and repaired, eliminating the need to disassemble other parts. In addition, the deviation of the observation direction by the first optical member 29 can be easily corrected.

FIGS. 8 to 10 relate to a third embodiment of the present invention. FIG. 8 is a structural view showing the structure of a first optical frame member and a second optical frame member. FIG. The first is the main part
FIG. 10 is an enlarged configuration diagram showing the configuration of the cylindrical portion of FIG.
It is explanatory drawing explaining assembly of an optical frame member and a 2nd optical frame member.

Since the third embodiment is almost the same as the first embodiment, only different points will be described, and the same components will be denoted by the same reference numerals and description thereof will be omitted.

As shown in FIG. 8, in the present embodiment, a spring receiving groove 70 having a smaller diameter is formed in the first cylindrical portion 24a all around the outer peripheral portion. Further, a plurality of bearing holes 71, which are through holes, are opened in the spring receiving groove 70 toward the center of the first optical frame member 24.

As shown in FIG. 9, the spacer 3 is formed on the outer peripheral surface of the second cylindrical portion 25a on which the first cylindrical portion 24a is fitted.
A V-shaped groove 72 formed in a substantially V shape is formed at a position where the bearing hole 71 faces when the third optical member 29 is in contact with the third optical member 29.

The V-shaped groove 72 is formed at a position such that the center of the bearing hole 71 faces the inclined surface of the V-shaped groove 72 on the side where the first optical member 29 is attached. The width of 72 is formed larger than the diameter of the bearing hole 71.

A ball bearing 73 having substantially the same outer diameter as the inner diameter of the bearing hole 71 is inserted into the bearing hole 71.
A C-shaped band spring 74, which is a C-shaped spring member having an inner diameter smaller than the groove bottom diameter of 0, is provided.

The depth of the bearing hole 71 is smaller than the diameter of the ball bearing 73 minus the amount of protrusion N into the V-shaped groove 72. The distance M from the outer peripheral surface of the first cylindrical portion 24a to the outer peripheral surface of the C-shaped band spring 74 has a relationship of N> M.

The C-shaped band spring 74 is not limited to the C-shaped spring member, but may be a ring-shaped elastic member made of rubber or the like.

The other structure is the same as that of the first embodiment.

Next, the operation of the present embodiment thus configured will be described.

The first optical frame member 24 and the second optical frame member 25 are connected to the inner peripheral surface of the first cylindrical portion 24a and the second cylindrical portion 25.
a The outer peripheral surface is fitted. Then, as shown in FIG. 10, the ball bearing 73 is urged toward the second optical frame member 25 by the C-shaped band spring 74.

The ball bearing 73 pushes the inclined surface of the V-shaped groove 72 on the side where the first optical member 29 is attached in the direction F in FIG. Then, the force F ′ for pushing the second cylindrical portion 25a toward the first optical member 29 by the force F is applied to the V-shaped groove 72.
Occurs. As a result, the second optical frame member 25 is
Is always pressed against the optical member 29.

Thereafter, the first optical frame member 24 and the second optical frame member 25 are integrally inserted from the rear of the through hole 23,
The outer peripheral surface of the second optical frame member 25 and the inner peripheral surface of the through hole 23 are fitted to be coaxial with the through hole 23.

Further, even if a second pulling force is applied to the second optical frame member 25 in the state where the second optical frame member 25 is attached to the through-hole 23, the C-shaped band-shaped spring 74 is moved through the first cylindrical portion by the through-hole 23. 2
4a does not spread beyond the outer peripheral surface.

The ball bearing 73 can move in the direction of the outer peripheral surface of the first cylindrical portion 24a only by the distance M, and because of N> M, the ball bearing 73 and the V-shaped groove 72 also interfere in this state. Therefore, when the first optical frame member 24 and the second optical frame member 2 are attached to the through-hole 23,
5 does not come off.

The other operations are the same as in the first embodiment.

As described above, in this embodiment, in addition to the effects of the first embodiment, the connection between the first optical frame member 24 and the second optical frame member 25 is established by the first cylindrical portion 24a and the second optical frame member 25. 2 and the ball bearing 73 and C
Since the operation is completed only by assembling the mold band spring 74, the operation is simple.

Further, since the second optical frame member 25 is urged toward the first optical member 29 by the spring material, the first
There is no need to provide a means for fixing or urging the optical frame member 24, and the configuration can be simplified.

Further, since the ball bearing 73 is a minute member, it is possible to reduce the complexity of work by using a member having no directivity such as a ball bearing.

Further, the first optical frame member 2 is
4. Second optical frame member 25 and C connected thereto
When the CD 27, the signal cable, and the like are removed, the means for fixing the second optical frame member 25 to the through hole 23 is removed, and the second optical frame member 25 is simply pulled backward, so that the first optical frame 25 is pulled out. The member 24 can also be removed, and the work of disassembly is simple.

FIGS. 11 and 12 relate to a fourth embodiment of the present invention. FIG. 11 is a structural view showing the structure of a first cylindrical portion, and FIG. 12 explains a modification of the pressing member of FIG. FIG.

Since the fourth embodiment is almost the same as the third embodiment, only different points will be described, and the same components will be denoted by the same reference numerals and description thereof will be omitted.

As shown in FIG. 11, in the present embodiment,
In the spring receiving groove 70, one end of a cylindrical member having an outer diameter smaller than the inner diameter of the bearing hole 71 is subjected to spherical processing, and a pressing member 75 in which the other end is formed with a flange having an outer diameter larger than the bearing hole 71 is formed. Is inserted.

The outer periphery of the pressing member 75 is pressed toward the inner peripheral direction of the first cylindrical portion 24a by a C-shaped band spring 74.

The pressing member 75 may be fixed integrally with a C-shaped band spring 74 as shown in FIG. Here, the C-shaped band spring 74 may be an elastic member made of rubber or the like formed in a ring shape, and a pressing member 75 made of a hard member may be integrally fixed when the C-shaped band spring 74 is molded. . In addition, the pressing member 75 may be formed of an elastic member.

The other structure is the same as that of the third embodiment.

Next, the operation of the present embodiment thus configured will be described.

The pressing member 75 has a flange portion in contact with the bearing hole 71, and the first cylindrical portion 24a and the second cylindrical portion 25
Before connecting a, it is possible to attach it to the first cylindrical portion 24a. Therefore, the first cylindrical portion 2
4a, a pressing member 75 and a C-shaped band spring 74 are assembled, and then the first cylindrical portion 24a is replaced with the second cylindrical portion 25a.
The first optical frame member 24 and the second optical frame member 25 can be connected to each other.

The pressing member 75 and the C-shaped band spring 74 are integrated, so that the pressing member 75 is attached to the first cylindrical portion 24a.
, The pressing member 75 and the C-shaped band spring 74 can be assembled to the first cylindrical portion 24a at one time.

The other operations are the same as in the third embodiment.

As described above, in the present embodiment, in addition to the effects of the first embodiment, before the second cylindrical portion 25a is fitted into the first cylindrical portion 24a, the pressing member 75 is moved to the first cylindrical portion 24a. Since it can be assembled to the cylindrical portion 24a, at the time of repair, the work is completed only by fitting the second cylindrical portion 25a and the first cylindrical portion 24a. 73, the C-shaped band spring 74 is
This eliminates the complexity of mounting after a is fitted into the first cylindrical portion 24a.

In the case shown in FIG. 12, the pressing member 7
5 and the C-shaped band spring 74 are integrated,
The workability of attaching to the cylindrical portion 24a is simplified.

FIG. 13 is a configuration diagram showing the configuration of the distal end portion according to the fifth embodiment of the present invention.

Since the fifth embodiment is almost the same as the first embodiment, only different points will be described, and the same components will be denoted by the same reference numerals and description thereof will be omitted.

As shown in FIG. 13, in the present embodiment,
An elastic member 81 made of fluorine rubber or the like is disposed between the flange 38 formed on the front end cover 37 and a step formed by a small outer diameter portion formed at the front end of the first optical frame member 24. .

The other structure is the same as that of the first embodiment.

Next, the operation of the present embodiment thus configured will be described.

The first optical member 29 mounted on the first optical frame member 24 is urged by the spacer 33 fixed to the second optical frame member 25 by the elastic force of the elastic member 81.

When the pacer 33 is excessively pushed into the first optical member 29 due to excessive tightening of the screw member 35, the force applied to the first optical member 29 is buffered by the elastic force of the elastic member 81. Further, even if the second optical frame member 25 moves slightly backward due to the loosening of the screw member 35, the first optical frame member 24 is always urged from the front by the elastic member 81, and the first optical member 29 is always kept. And the spacer 33 abut.

The other operations are the same as in the first embodiment.

As described above, in the present embodiment, in addition to the effects of the first embodiment, fine adjustment of the tightening amount of the screw member 35 is not required during replacement and repair work when the observation window 28 is damaged at the time of assembly. Required, and the assembling work is simple. Further, even if the screw member 35 is loosened over time, no optical failure occurs.

FIG. 14 is a configuration diagram showing the configuration of the distal end component according to the sixth embodiment of the present invention.

Since the sixth embodiment is almost the same as the first embodiment, only different points will be described, and the same components will be denoted by the same reference numerals and description thereof will be omitted.

As shown in FIG. 14, in the present embodiment,
The flange 38 is formed separately from the tip cover 37,
The fixing member 91 is formed as a continuous surface with the outer surface formed by the distal end cover 37 after screwing. The outer diameter of the fixing member 91 is formed larger than 27. The fixing member 9
At least two non-through holes 92 in one surface
Are formed.

The other structure is the same as that of the first embodiment.

Next, the operation of the present embodiment thus configured will be described.

The fixing member 91 can be detached from the front end cover 37 by using a forked tool such as tweezers, inserting the tip of the tool into the small hole 92 and rotating the tool.
Then, after removing the fixing member 91, the first optical frame member 24 can be removed in the distal direction.

Conversely, after the first optical frame member 24 is inserted into the through hole 23, the fixing member 91 is screwed into the distal end cover 37, so that the first optical frame member 2 is
4 is held and fixed by the second optical frame member 25.

The other operations are the same as those of the first embodiment.

As described above, in this embodiment, in addition to the effects of the first embodiment, when the observation window 28 is damaged by impact or the like, the first optical frame member 24 is moved from the front of the front cover 37. It can be replaced and repaired, eliminating the need to disassemble other parts.

In addition to the effects of the second embodiment, there is no need to use many screw members 35, and the configuration is simple.

This embodiment may be applied to the third to fifth embodiments.

In the first to sixth embodiments, the first optical frame member 24 may be formed of an insulating material such as a resin. As an effect in this case, when a treatment tool such as a high-frequency wave is used, current can be prevented from flowing into the first optical frame member 24 from the portion exposed to the outside. The fixed insulating member 32 can be eliminated, and the configuration of the second optical frame member 25 can be simplified.

As shown in FIG. 15, in the first to sixth embodiments, a detachable cover 101 which is detachably provided at the tip of the tip component 16 may be provided.

FIG. 15 is a configuration diagram showing the configuration of the distal end of the distal end portion according to a modification of the first to sixth embodiments.

That is, as shown in FIG. 15, the distal end component 16 at this time includes an observation window 28 for obtaining an observation image, an air supply / liquid supply pipe 102 serving as a pipe for supplying air / liquid, and An illumination optical system 103 and a suction port 104 for drawing out a treatment tool for sucking a body fluid or the like or treating an inspection site are configured.

[0113] The suction port 104 is
Is open at the end face of the connection protruding part 105 formed so as to protrude from the end face. A positioning notch 106 formed by partially cutting the side wall is formed on the outer peripheral surface of the distal end component 16.

Here, the detachable cover 101 is formed of a resin or the like whose outer diameter is substantially the same as that of the distal end portion 16. Further, the detachable cover 101 has a connection hole 107 formed of a through hole having substantially the same shape as the shape of the connection protrusion 105, the observation window 28, and the observation cover glass 10 covering the illumination optical system 103.
8, illumination cover glass 109, observation cover glass 10
Nozzle 11 with nozzle opening 110a towards 8
0 are integrally arranged.

Further, a tongue-shaped protruding member is provided on a part of the outer peripheral surface of the detachable cover 101, and the positioning notch 106
And a positioning projection 111 that engages with the first projection.

The projecting length of the connection projecting portion 105 from the end face of the distal end forming portion 16 is equal to or longer than the length of the detachable cover 101 in the thickness direction.

It is sufficient that at least the suction port 104 is provided in the connection projecting portion 105. In addition to the suction port 104, the observation window 28 and the illumination optical system 103 may be further provided. In the detachable cover 101, the connection hole 107
Is formed of an elastic material such as an elastomer, and the shape of the connection hole 107 is
The shape may be a tighter shape.

In the configuration shown in FIG.
1 is connected to the distal end component 16 at one position by fitting the connection hole 107 and the connection projection 105, and the positioning notch 106 and the positioning projection 111 are engaged and fixed. At this time, the observation window 28 and the observation cover glass 108, the illumination optical system 103 and the illumination cover glass 10
9. The air / liquid supply line 102 and the nozzle 110 abut each other.

As a result, the illumination light is transmitted to the illumination optical system 103.
The light is emitted forward through the illumination cover glass 109. The observation image is passed through observation window 2 through observation cover glass 108.
It is led to 8. Further, the gas and liquid sent from the gas supply / liquid supply pipe 102 are ejected to the surface of the observation cover glass 108 through the nozzle 110.

In this combined state, even when the insertion section 2 is inserted into the body cavity or the like and the body fluid is sucked through the suction port 104, dirt or the like intrudes between the detachable cover 101 and the distal end component section 16. Nothing.

Further, by forming the connection hole 107 by an elastic member, the detachable cover 101 is firmly fixed to the distal end constituting portion 16 more than the mounting strength between the positioning notch portion 106 and the positioning convex portion 111. be able to.

By forming the distal end component 16 as shown in FIG. 15, the detachable cover 10 in which the nozzle 110 is integrally arranged is provided.
1, the detachable cover 101 is provided near the suction port 104.
It is possible to reduce the intrusion of waste into the space between the tip and the tip component 16.

[Supplementary Note 1] (Supplementary Note 1-1) In an endoscope in which an optical system including a plurality of optical members and an optical frame member for attaching the optical system are provided in a water-tight manner at a distal end portion. The plurality of optical members are attached to a plurality of optical frame members, and the plurality of optical frame members are attached and fixed at least in a watertight manner to a first optical member exposed to the outside of the distal end component. A first optical frame member, and a second optical frame member for attaching a second optical member that is not attached to the first optical frame member. With the optical frame member of
An endoscope, wherein the first optical frame member is configured to be detachable from the second optical frame member.

(Additional Item 1-2) The second optical member attached to the second optical frame member is adjusted in focus in advance on a solid-state imaging device or an image fiber bundle and is fixed in a watertight manner. The first frame attached to the first optical frame member;
The endoscope according to additional item 1-1, wherein the optical member is adjusted in advance in focus with respect to the second optical member attached to the second optical frame member.

(Additional Item 1-3) The first optical frame member is characterized in that a concave lens and at least a lens adjacent to the concave lens are attached to the first optical frame member. Endoscope.

(Additional Item 1-4) The additional optical system according to additional item 1-1, wherein the first optical frame member and the second optical frame member are fitted and abutted and arranged in the distal end constituting portion. The endoscope as described.

(Additional Item 1-5) The additional optical system according to additional item 1-1, wherein the second optical frame member is fitted and abutted on the first optical member and is disposed in the distal end constituting portion. Endoscope.

(Additional Item 1-6) The endoscope according to Additional Item 1-1, wherein the first optical frame member is detachably attached to a distal end side of the distal end component. mirror.

(Additional Item 1-7) The inner peripheral surface of the through hole formed in the distal end component through which the first and second optical frame members are inserted, and the outer peripheral surface of the second optical frame member are fitted. 7. The endoscope according to Supplementary Items 1-1 to 1-6, wherein the endoscope is combined.

(Additional Item 1-8) The first optical frame member is sandwiched and fixed between the second optical frame member and the distal end component, and is attached. The endoscope according to 1-7.

(Additional Item 1-9) An additional item 1 is characterized in that a screw member is provided at the distal end portion, and the second optical frame member is fixed to the distal end portion by the screw member. The endoscope according to -8.

(Additional Item 1-10) The distal end of the screw portion has a conical shape, and a substantially V-shaped portion is formed on the outer peripheral surface of a portion of the second optical frame member which engages with the screw member. The endoscope according to Additional Items 1-9, wherein a groove is formed on the entire circumference, and the tip of the screw portion is located on a tip side slope of the substantially V-shaped groove. .

(Supplementary Item 1-11) A contact portion is provided between the first optical frame member and a through hole formed in the distal end portion for inserting the first optical frame member. An endoscope according to additional item 1-8, wherein:

(Additional Item 1-12) The endoscope according to Additional Item 1-11, wherein the abutting portion is provided on a distal end side of the through hole formed in the distal end constituting portion.

(Additional Item 1-13) The contact portion includes a flange portion provided in the inner diameter direction of the through hole and a flange portion provided in the outer diameter direction of the first optical frame member. An endoscope according to additional item 1-11, characterized in that:

(Supplementary Item 1-14) An elastic member is provided between the first flange portion provided in the through hole and the second flange portion provided in the first optical frame member. 13. The endoscope according to additional item 1-11, wherein:

(Additional Item 1-15) A screw member is provided at the tip end portion, and the first member is formed by the screw member.
7. The endoscope according to claim 1, wherein the optical frame member is fixed to the distal end component.

(Additional Item 1-16) The distal end of the screw portion has a conical shape, and a substantially V-shaped portion is formed on an outer peripheral surface of a portion of the second optical frame member which engages with the screw member. The endoscope according to claim 1-6, wherein a groove is formed on the entire circumference, and the tip of the screw portion is located on a slope on the tip side of the substantially V-shaped groove. .

(Additional Item 1-17) The endoscope according to Additional Item 1-1, wherein the first optical frame member is formed of a material having low conductivity such as resin.

By the way, with an endoscope, observation often becomes difficult due to adhesion of bodily fluids or dirt to the observation window, and air or water is blown away each time. It is difficult to remove from a window, and even if removed by air, a body fluid or the like immediately adheres, and it is difficult to obtain a good observation state.

Therefore, for example, Japanese Utility Model Publication No. 57-54801 discloses an endoscope in which a water-repellent area is provided around an observation window so that once removed washing water or body fluid does not return to the observation window again. ing.

In Japanese Patent Application Laid-Open No. 2-129613, a water-repellent coating is applied to the entire surface of the observation window, and the lens is provided after the water-repellent coating in order to prevent the water-repellent coating from adhering to the outer diameter of the lens. Has proposed an endoscope that performs outer diameter processing.

However, in Japanese Utility Model Publication No. 57-54801, a water-repellent area is formed around the observation window.
At the boundary between the observation window and the water-repellent area, there is a point that the water supply liquid remains and water droplets are generated on the observation window.

When the amount of air supplied from the nozzle is reduced due to a decrease in the air supply function, water droplets on the observation window cannot be sufficiently removed, and water droplets remaining on the observation window increase. .

Further, the water droplets drawn into the hydrophilic portion are only a part of the water droplets on the observation window, and cannot remove all the water droplets.

On the other hand, in JP-A-2-129613, as described above, a water-repellent coat is applied to the entire surface of the observation window, and the water-repellent coat is prevented from adhering to the outer diameter of the lens. The outer diameter processing of the lens is performed after the water coating, but in this case, there is a possibility that the water-repellent coat is peeled off during the outer diameter processing of the lens.

Therefore, an endoscope will be described which does not affect the observation of a subject even if water drops remain on the observation window.

FIGS. 16 and 17 relate to the first embodiment of the endoscope which does not affect the observation of the subject even if water drops remain on the observation window. FIG. FIG. 17 is an explanatory view illustrating a water-repellent coat on the observation window in FIG. 16.

Since the present embodiment is almost the same as the embodiment shown in FIGS. 1 to 5, only different points will be described, and the same components will be denoted by the same reference numerals and description thereof will be omitted.

As shown in FIG. 16 (a), the tip component 1
6, an observation window 28 for obtaining an observation image, and a nozzle 1 having a nozzle opening 151a for feeding air and liquid toward the observation window 28 are provided.
51, an illumination optical system 152, a suction port 153 for drawing out a treatment tool for sucking a body fluid or treating an examination site
Is configured.

As shown in FIG. 16B, the observation window 28 has an outer diameter larger than the light beam 154 which is the outermost of the observation range. In addition, as shown in FIG. 17, fluorine, PT
A water-repellent coat 155 such as FE is provided.

The other structure is the same as that of the embodiment shown in FIGS.

In the present embodiment configured as described above,
After the liquid is sent by the nozzle 151, water droplets remaining on the water-repellent coat 155 of the observation window 28 are removed by the water-repellent coat 155.
It becomes a spherical water droplet with a large contact angle. After this, nozzle 1
When air is supplied from the water repellent 51, the water droplet has a large contact angle on the water repellent coat 155, and thus slides on the water repellent coat 155, and the observation window 2
8 moves to a range where the water-repellent coat 155 is not coated.

As described above, in the present embodiment, water droplets in the observation visual field range are immediately removed by air supply, and the visual field is always kept good.

Further, since the coating is not applied to the area other than D within the visual field range of the observation window 28, the observation window 28 can be fixed to the distal end component 16 by bonding or the like.

In addition, since the side surface of the observation window 28 is not coated, there is no need to remove the coating during assembly.

FIG. 18 is a view for explaining a water-repellent coat on the observation window according to the second embodiment of the endoscope which does not affect the observation of the subject even if water drops remain on the observation window. FIG.

This embodiment is almost the same as the embodiment shown in FIGS. 16 and 17, and therefore only different points will be described, and the same components will be denoted by the same reference numerals and description thereof will be omitted.

As shown in FIG. 18, in the present embodiment, in FIG.
A hydrophilic coat 161 is applied to portions other than the portion D shown in FIG.

The other structure is the same as that of the embodiment shown in FIGS.

In the present embodiment configured as described above,
Water droplets remaining on the boundary of the water-repellent coat 155 are drawn to the hydrophilic coat 161 which is a hydrophilic part.

Therefore, in the present embodiment, in addition to the effects of the embodiment shown in FIGS. 16 and 17, even if the air supply capacity is reduced due to the deformation of the nozzle opening 151a of the nozzle 151, the visual field is reduced. Water droplets in the area can be effectively removed.

[Supplementary Note 2] (Supplementary note 2-1) An optical system composed of a plurality of optical members is provided at the distal end component, and an image obtained from this optical system is formed on the end face of the image fiber bundle or the solid-state image sensor. In an endoscope for imaging and obtaining an observation image, the outer diameter of the optical member exposed to the outside is made larger than the light receiving area on the optical member, and further, on the surface exposed to the outside of the optical member, and
An endoscope characterized in that at least a light receiving area is coated with a water-repellent coating.

(Additional Item 2-2) The endoscope according to Additional Item 2-1 wherein the water-repellent coating agent is a fluorine-based coating agent.

(Additional Item 2-3) The inner surface of the additional item 2-1 wherein an exposed surface of the optical member exposed to the outside is coated with a hydrophilic coating in an area other than a light receiving area. Endoscope.

On the other hand, Japanese Utility Model Laid-Open No. 55-131701 proposes an endoscope having a nozzle in which the nozzle is locked to a main body of the distal end portion. The nozzle is a tiny part, the opening is small, and the opening position with respect to the observation window is slightly displaced. There is.

An endoscope that can easily align the direction of the opening of the nozzle with the observation window when mounting and fixing the nozzle will be described.

FIGS. 19 to 21 relate to a first embodiment of an endoscope which can easily align the direction of the opening of the nozzle with the observation window in mounting and fixing the nozzle.
19 is a configuration diagram showing a configuration of a nozzle for cleaning an observation window provided at the distal end of the distal end component, FIG. 20 is a cross-sectional view showing a cross section of the distal end component and the nozzle of FIG. 19, and FIG. 21 is a nozzle of FIG. It is a block diagram which shows the structure of the modification of FIG.

This embodiment is different from the embodiment shown in FIGS.
Since the present embodiment is almost the same as the embodiment shown in FIG. 1, only different points will be described, and the same components will be denoted by the same reference numerals and description thereof will be omitted.

As shown in FIG. 19, the nozzle 171 has
In addition to the nozzle opening 171a, an engaging projection 172, which is a hard member formed in an arm shape, is integrally provided. That is, the engagement convex portion 172 is formed by the nozzle opening 171a.
The nozzle 171 is formed at a position other than the position where is formed.

As shown in FIG. 20, a groove formed in the same shape as the engaging projection 172 is formed around the distal end of the first optical frame member 24 to which the observation window 28 is attached. Are provided.

An air / liquid supply conduit 174 is opened in a part of the engagement concave portion 173, and the body of the nozzle opening 171a is fitted around the opening of the gas / liquid supply conduit 174. It has such a hole shape. Further, the gas supply / liquid supply line 17
A fixing screw 175 which is a male screw is screwed into the hole-shaped portion of the four openings from the side surface.

When the fixing screw 175 is provided, a through hole larger than the outer diameter of the fixing screw 175 is opened on the side surface of the tip cover 37 at the same position.

The engaging projection 172 is not limited to the arm shape, but may be a ring shape surrounding the first optical frame member 24 as shown in FIG.

The other structure is the same as that of the embodiment shown in FIGS.

In the present embodiment configured as described above,
Since the engaging projection 172 and the nozzle 171 are integrally formed, the nozzle opening 171 formed in the nozzle 171 is formed.
The position a is one point with respect to the engagement convex portion 172.

Since the engaging concave portion 173 is formed in the same shape as the engaging convex portion 172, the engaging convex portion 172 is located at one mounting position with respect to the engaging concave portion 173.

Since the engagement recess 173 is formed with respect to the first optical frame member 24 to which the observation window 28 is attached, the positional relationship between the observation window 28 and the engagement recess 173 is one.

Therefore, the engaging projection 172 is replaced with the engaging recess 173.
, And the fixing screw 175 is tightened to press the outer peripheral surface of the nozzle 171, so that the nozzle 171 is
Can be fixed. In this state, the nozzle opening 1
71 a can be positioned with respect to the observation window 28.

Since the engaging projection 172 is provided in a portion other than the portion where the nozzle opening 171a is formed, the nozzle opening 171a is provided.
And the observation window 28 can be shortened.

Therefore, in the present embodiment, the nozzle 171
The nozzle opening 17 is fixed when the nozzle opening 17
The position of 1a can be easily determined with respect to the observation window 28 by the engagement between the engagement projection 172 and the engagement recess 173.

Further, when the nozzle 171 is attached, fine adjustment of the nozzle opening 171a is unnecessary. Further, since the nozzle opening 171a and the observation window 28 are close to each other, the ability to remove dirt on the surface of the observation window 28 is large.

FIGS. 22 and 23 relate to a second embodiment of an endoscope which can easily align the direction of the opening of the nozzle with the observation window when the nozzle is mounted and fixed. FIG. FIG. 23 is a configuration diagram showing a configuration of a nozzle for cleaning an observation window provided at a distal end of a component, and FIG. 23 is a cross-sectional view showing a cross section of the distal component and the nozzle in FIG. 22.

This embodiment is similar to the embodiment shown in FIGS.
Since the present embodiment is almost the same as the embodiment shown in FIG. 1, only different points will be described, and the same components will be denoted by the same reference numerals and description thereof will be omitted.

As shown in FIG. 22, the engagement projection 172 is formed of a resin or elastomer or the like formed in an annular shape.
It is made of an elastic member.

On the inner peripheral surface of the engaging convex portion 172, the engaging concave portion 1 is provided.
23 has a slope in the direction of insertion into 73, and on the side where this slope is not formed, as shown in FIG. 23, a locking recess 181 having a groove shape is formed.

Further, on the outer peripheral surface of the first optical frame member 24, a locking convex portion 182 having a slope in the front end direction and having an increased outer diameter of the first optical frame member 24 is provided. .

In the present embodiment configured as described above,
When the engagement protrusion 172 is inserted into the engagement recess 173, the engagement protrusion 182 pushes the inner peripheral surface of the engagement protrusion 172 so that the engagement protrusion 172 is elastically deformed. When further insertion is performed, the locking projection 182 is engaged with the locking recess 181, and the engagement projection 172 is locked with the engagement recess 173. As a result, the nozzle 171 is fixed to the distal end component 16.

Therefore, in this embodiment, the fixing screw 175 shown in FIG. 20 is not required, and the workability is improved accordingly. Also, in repair and replacement, workability is improved because it is not necessary to handle the fixing screw 175 which is a minute screw.

[Supplementary Note 3] (Supplementary note 3-1) At least an observation system is provided at the distal end of the endoscope.
In an endoscope having an optical member group of an illumination system and a nozzle for cleaning the observation system, the optical member of the observation system,
Alternatively, an endoscope is provided in which the nozzle is provided with an engaging portion that engages with an optical frame member to which the optical member is attached.

(Additional Item 3-2) The endoscope according to Additional Item 3-1 wherein the engaging portion is provided at a position other than an opening of the nozzle toward the observation system.

(Additional Item 3-3) The additional item 3-1 is characterized in that the engaging portion is disposed at a portion that does not interfere with the visual field range of the observation system and the illumination light range of the illumination system. The endoscope as described.

(Additional Item 3-4) The endoscope according to Additional Item 3-1 wherein the shape of the engaging portion differs depending on the combination of the nozzle and the endoscope.

By the way, the endoscope generally feeds a suction channel through which a treatment instrument is inserted or a body fluid or the like, or an air / liquid feeding channel connected to a nozzle for washing an observation window into the insertion portion. However, these channels are generally cleaned before and after surgery.

However, since the inner diameter of each channel is different, the conventional cleaning method has a problem that the channels cannot be cleaned at the same time.

Therefore, Japanese Patent Laid-Open Publication No. Sho 59-192345 proposes an endoscope for solving the above problem.

However, the above-mentioned Japanese Patent Application Laid-Open No.
Since the publication No. 345 is intended for all pipelines,
Due to the balance between the inner diameters of the air supply, liquid supply, and suction pipes, there is a problem that it is not possible to obtain a flow rate sufficient for cleaning the respective pipes.

That is, the cleaning liquid generally flows into the suction pipe having the largest inner diameter, and a sufficient cleaning effect of the air / liquid feeding pipe and the nozzle connected thereto cannot be obtained.

In general, when a high pressure is applied to the air / liquid supply pipe, each connection portion of the pipe and the pipe itself may be damaged.

[0200] Next, an endoscope capable of satisfactorily removing the liquid remaining in the air / liquid supply pipe will be described.

FIGS. 24 to 27 relate to an embodiment of an endoscope capable of satisfactorily removing liquid remaining in an air / liquid supply line, and FIG. 24 shows a tube configuration inside the endoscope. FIG. 25 is an enlarged view of the vicinity of the distal end component of FIG. 24, and FIG. 26 is a configuration diagram showing the configuration of a button member in which the liquid supply closing button and the air supply closing button of FIG. 24 are integrated. FIG.
FIG. 7 is a configuration diagram showing a configuration of a suction closing button for closing the suction channel of FIG.

This embodiment is similar to the embodiment shown in FIGS.
Since the present embodiment is almost the same as the embodiment shown in FIG. 1, only different points will be described, and the same components will be denoted by the same reference numerals and description thereof will be omitted.

As shown in FIG. 24, inside the endoscope, an air supply pipe 201 and a liquid supply pipe 202 formed of a tube body.
A gas supply line 174 formed by merging the gas supply line 201 and the liquid supply line 202; a nozzle 171 connected to the gas supply line 174; a suction line 203; An air / liquid feeding cylinder 204 to which an air / liquid feeding button 20 for controlling each function of the air / liquid feeding is connected to the liquid feeding pipe 201 and the liquid feeding pipe 202, and a suction for connecting the suction pipe 203 to control the suction function. Suction cylinder 20 to which button 21 is attached
5 are arranged.

A cap member 208 partially connected to the decompression pump 207 via the connection tube 206 is fitted and fixed to the distal end component 16.

The fitting portion of the cap member 208 is formed of a member having elasticity, and is hermetically attached on the outer peripheral surface of the distal end forming portion 16. In a portion where the cap member 208 is not fitted and fixed to the distal end component 16, a contact portion 209 formed integrally with the inner peripheral surface is formed as a convex portion that comes into contact with the end surface of the distal end component 16. Note that at least a portion of the cap member 208 that is not fitted and fixed to the distal end component 16 is made of a hard material.

Further, as shown in FIG.
Is integrally provided with a lid member 210 which is inserted into the suction port 104 which is an opening of the suction pipe 203 and hermetically closes the suction port 104.

[0207] The end surface of the tip component 16 and the cap member 208
The decompression space 211, which is a space formed on the inner surface, is arranged so as not to block the nozzle 171 and the nozzle opening 171a.

On the other hand, the air / liquid feeding cylinder 204 is
6 (a) and (b), the liquid supply closing button 21
A button member in which the air supply block 2 and the air supply closing button 213 are integrated is attached. The liquid supply closing button 212 and the gas supply closing button 213 are fitted with the gas supply closing button 213 having a through hole at the center on the inner peripheral surface of the liquid supply closing button 212.

Each of the liquid supply closing button 212 and the gas supply closing button 213 has a through hole opened on the side surface, and each of the holes has an air supply and liquid supply cylinder 20 as shown in FIG.
4 is arranged so as to be conductive only when the air supply closing button 213 is pressed in.

The liquid supply closing button 212 is formed so as to fit with the inner peripheral surface of the gas supply liquid supply cylinder 204, and the through hole provided on the side surface of the liquid supply closing button 212 has an air supply liquid supply cylinder When connected to 204, it is formed so as to be electrically connected to the liquid sending pipeline 202.

Further, the through hole provided at the center of the air supply / closing button 213 is connected to the air supply / liquid supply cylinder 204, and when the air supply / closure button 213 is pushed in, the through hole is provided.
The bottom surface of the air / liquid supply cylinder 204 is formed so that the bottom surface of the air / liquid supply cylinder 204 abuts on the bottom surface of the gas / liquid supply cylinder 204.

Note that, instead of the lid member 210, as shown in FIG. 27, a suction blockage button 215 which is fitted to the inner peripheral surface of the suction cylinder 205 and closes the suction conduit 203 opened toward the suction cylinder 205 is provided. May be attached.

Further, the lid member 210 and the suction cylinder 20
The orifice 5 may be an orifice through which the suction pipe 203 and the decompression space 211 communicate with each other by a fine hole, and the diameter of the fine hole may be completely reduced to serve as the closing means.

In the present embodiment configured as described above,
When the vacuum pump 207 is operated, the connection tube 206
The pressure in the depressurized space 211 is reduced through.

The decompression space 211 is not deformed because the cap member 208 is formed of a hard member, and does not collapse because the cap member 208 is in contact with the distal end component 16 by the contact portion 209, so that the decompression space 211 has a constant volume. Be attached.

Since the fitting portion between the cap member 208 and the distal end component portion 16 is airtightly attached by an elastic member, even if the inside of the decompression space 211 is decompressed, the inside of the decompression space 211 is moved into the decompression space 211. There is no inflow of outside air.

Further, since the suction conduit 203 is closed by the lid member 210 or the suction closing button 215,
No air flows into the decompression space 211 from the suction pipe 203.

Therefore, outside air flows from the nozzle opening 171a into the decompression space 211 through the gas supply / liquid supply cylinder 204, the gas supply conduit 201, the liquid supply conduit 202, and the gas supply / liquid supply conduit 174. This makes it possible to remove water from the air supply pipe 201 and the liquid supply pipe 202.

If the nozzle opening 171a is clogged with impurities contained in water or the like, the pressure reducing pump 2
At 07, the pressure in the decompression space 211 is reduced, and the nozzle opening 1
The impurities clogged in 71a can be sucked out.

Further, an air supply line 201 and a liquid supply line 202
If it is desired to perform one of the water removal,
26A, the liquid supply closing button 212 and the gas supply closing button 213 are connected to each other, and if the gas supply blocking button 213 is not pushed in as shown in FIG. 26A, water can be removed only from the gas supply pipe 201, and FIG. If the air supply closing button 213 is pushed in as in b), it is possible to remove water only from the liquid supply conduit 202.

Therefore, in the present embodiment, it is possible to remove water without applying a positive pressure to each of the gas supply and liquid supply pipes of the endoscope, which may cause damage to the pipes.

Further, it is possible to remove impurities adhered to the opening of the nozzle, and it is possible to always ensure good air / water supply capacity.

[Supplementary Note 4] (Supplementary item 4-1) The operating section of the endoscope provided with the air supply line, the liquid supply line, and the suction line includes the air supply line and the liquid supply line. A suction cylinder connected to the suction pipe, the suction port communicating with the suction pipe at the distal end of the insertion portion of the endoscope, and the suction pipe. And a nozzle communicating with the liquid supply pipe, and a connector of a light guide cable connected to the operation unit, a suction port body communicating with the suction pipe, and an air supply communicating with the air supply pipe. In the endoscope provided with a liquid body and a liquid supply port communicating with the liquid supply conduit, a cap member that can be hermetically attached to and detached from the distal end of the insertion portion is provided, and the flow rate of the suction conduit is adjusted. And a pressure reducing means communicating with the inside of the cap member. The endoscope according to claim.

(Additional Item 4-2) The orifice means of the suction conduit is an elastic member provided inside the cap member, and when the cap member is connected to the distal end of the endoscope, the orifice means is provided. 4. The endoscope according to Additional Item 4-1, wherein the endoscope is arranged to be fitted into the mouth.

(Additional Item 4-3) The orifice means of the suction conduit is connected to the suction cylinder portion, and comprises a button member that opens to the suction cylinder portion and closes the suction conduit on the insertion portion side. The endoscope according to Additional Item 4-1 characterized by the above-mentioned.

(Additional Item 4-4) The endoscope according to Additional Items 4-1 to 4-3, wherein the orifice means is a means for completely closing a pipe.

(Additional Item 4-5) The endoscope according to Additional Item 4-1 wherein the decompression means is a suction pump.

(Supplementary Note 4-6) A button connected to the air / liquid supply cylinder and opened to the gas / liquid supply cylinder, the air supply line on the insertion portion side, and a button for selectively closing the air supply line The endoscope according to Additional Item 4-1 comprising a member.

(Additional Item 4-7) The cap member may be
4. The endoscope according to Additional Item 4-1, wherein the endoscope is formed of a hard member and has a convex portion that comes into contact with an end surface of the distal end portion of the endoscope.

[0230]

As described above, according to the endoscope of the present invention, the first optical frame member and the second optical frame member are fitted to each other, and the first optical frame member is connected to the second optical frame member. Since it is configured to be detachable from the frame member, if the optical member at the end of the endoscope is damaged due to external impact, etc., it can be repaired by replacing only the top end, and at the time of repair There is an effect that the focus adjustment of the members is not required, and the replacement operation can be easily performed.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing a configuration of an endoscope apparatus including an endoscope according to a first embodiment of the present invention.

FIG. 2 is a perspective view showing the appearance of the endoscope of FIG. 1;

FIG. 3 is a cross-sectional view showing a cross-sectional configuration of a tip component of FIG. 2;

FIG. 4 is a first explanatory view illustrating assembly of the first optical frame member and the second optical frame member of FIG. 3;

FIG. 5 is a second explanatory view for explaining the assembly of the first optical frame member and the second optical frame member of FIG. 3;

FIG. 6 is a cross-sectional view illustrating a cross-sectional configuration of a distal end component according to a second embodiment of the present invention.

FIG. 7 is an explanatory diagram illustrating a method of rotating the first optical frame member of FIG. 6 with respect to the center axis of the second optical member.

FIG. 8 is a configuration diagram showing a configuration of a first optical frame member and a second optical frame member according to a third embodiment of the present invention.

9 is an enlarged configuration diagram showing a configuration of a first cylindrical portion which is a main portion of FIG. 8;

FIG. 10 is an explanatory view illustrating assembly of the first optical frame member and the second optical frame member in FIG. 8;

FIG. 11 is a configuration diagram showing a configuration of a first cylindrical portion according to a fourth embodiment of the present invention.

FIG. 12 is an explanatory view illustrating a modification of the pressing member of FIG. 11;

FIG. 13 is a configuration diagram showing a configuration of a distal end configuration portion according to a fifth embodiment of the present invention.

FIG. 14 is a configuration diagram showing a configuration of a distal end configuration portion according to a sixth embodiment of the present invention.

FIG. 15 is a configuration diagram illustrating a configuration of a distal end of a distal end portion according to a modification of the first to sixth embodiments.

FIG. 16 is a configuration diagram showing a configuration of a distal end portion according to the first embodiment of the endoscope which does not affect observation of a subject even if water drops remain on an observation window;

FIG. 17 is an explanatory view illustrating a water-repellent coat on the observation window in FIG. 16;

FIG. 18 is an explanatory diagram illustrating a water-repellent coat on the observation window according to the second embodiment of the endoscope which does not affect the observation of the subject even if water drops remain on the observation window.

FIG. 19 is an observation provided at the distal end of the distal end component according to the first embodiment of the endoscope, which can easily align the direction of the opening of the nozzle with the observation window when the nozzle is mounted and fixed. Configuration diagram showing the configuration of the nozzle that cleans the window

FIG. 20 is a cross-sectional view showing a cross section of the tip component and the nozzle of FIG. 19;

FIG. 21 is a configuration diagram showing a configuration of a modified example of the nozzle of FIG. 19;

FIG. 22 is an observation provided at the distal end of the distal end component according to the second embodiment of the endoscope, which can easily align the direction of the opening of the nozzle with the observation window in mounting and fixing the nozzle. Configuration diagram showing the configuration of the nozzle that cleans the window

FIG. 23 is a cross-sectional view showing a cross section of the tip component and the nozzle of FIG. 22;

FIG. 24 is a configuration diagram showing a pipe configuration inside the endoscope according to an embodiment of the endoscope capable of satisfactorily removing liquid remaining in the air / liquid supply pipe;

FIG. 25 is an enlarged view in which the vicinity of the tip component of FIG. 24 is enlarged;

26 is a configuration diagram showing a configuration of a button member in which the liquid supply closing button and the air supply closing button of FIG. 24 are integrated.

FIG. 27 is a configuration diagram showing a configuration of a suction blockage button for blocking the suction line in FIG. 24;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Electronic endoscope 2 ... Insertion part 2a ... Treatment tool base 3 ... Operation part 4 ... Universal code 5 ... Connector 6 ... Light source device 7 ... Signal code 8 ... CCU 9 ... Lamp 10 ... Condenser lens 11 ... Light guide 12 ... Monitor 13 ... VTR deck 14 ... Video printer 15 ... Video disk 16 ... Tip end part 16a ... Tip end body 17 ... Bending part 18 ... Flexible tube 19a ... Vertical bending operation knob 19b ... Vertical bending braking lever 19c ... Left / right bending operation Knob 19d: Left and right curved braking lever 20: Air supply and liquid supply button 21 ... Suction button 22 ... Switch 23 ... Through hole 24 ... First optical frame member 24a ... First cylindrical portion 25 ... Second optical frame member 25a ... Second cylindrical portion 27 CCD 28 Observation window 29 First optical member 30 Elastic ring 31 Second optical member 31 a Optical frame member 32 Edge member 33 ... spacer 35 ... screw member 36 ... V-shaped groove 37 ... front cover 38 ... flange 39 ... lateral hole

Claims (1)

[Claims] 1. An endoscope in which an optical system including a plurality of optical members and an optical frame member for attaching the optical system are provided in a distal end portion in a watertight manner. A plurality of optical frame members, wherein the plurality of optical frame members are: A second optical frame member for attaching a second optical member which is not attached to the first optical frame member, wherein the first optical frame member and the second optical frame member are fitted together. An endoscope, wherein the first optical frame member is detachably attached to the second optical frame member.