JPH08126605A - Endoscope - Google Patents

Abstract

PURPOSE: To provide the tip part of an endoscope improved in washing power and the removal capacity of residual water because water and air are ejected toward the surface of an observation window from a nozzle and the surface of the observation window is smooth and good in surface accuracy and capable of being produced inexpensively in large quantities. CONSTITUTION: In the cover part 5 of an insertion part having air and water sending pipelines 14, 15 and a lens cover part 3 having an observation window, nozzle upper surface parts 52, 53 are composed of a tip part main body 51 and nozzle rear surface parts 54, 56 are integrally constituted along with the lens cover part 35 to obliquely eject a fluid toward the surface of the observation window.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an endoscope having a fluid nozzle for ejecting fluid to an optical window.

[0002]

2. Description of the Related Art In an endoscope apparatus in which the surface of an objective cover glass is washed with water jetted from a washing nozzle and water droplets are removed by the jetted gas, the surface of the objective cover glass is surely washed. Alternatively, in order to remove water droplets, it is desirable that the direction in which the fluid is ejected from the cleaning nozzle is not parallel to the surface of the objective cover glass but toward the surface.

As a cleaning nozzle in which the opening of the cleaning nozzle is directed to the surface of the objective cover glass, Japanese Patent Publication No. 61-110 is available.
In Japanese Patent Publication No. 86, one end of a pipe is formed to be flat and the tip is used as a jet port, and the flat portion is bent at an angle of 90 ° or more in the vicinity of the tip so that the jet port faces the surface of the objective cover glass. A method of manufacturing the above-described products is disclosed.

However, for cutting thin pipes,
Since it is necessary to perform a bending process, the manufacturing method is troublesome, and automation of manufacturing is also difficult, which is expensive.

As an example in which the washing nozzle of such a manufacturing method is not used, Japanese Utility Model Publication No. 57-36165 discloses that a protruding piece is directed from the hood provided at the tip end to the outlet of the feeding passage for feeding water and water. It is disclosed that the projection lens is made to project and the projection angle is made to be an acute angle toward the exit of the feeding passage to direct the fluid to the surface of the objective lens to effectively clean the objective lens.

However, since the hood must be manufactured separately from the distal end portion of the endoscope and there is a labor for assembling, the distal end portion of the endoscope cannot be manufactured at low cost. Further, since the hood is externally fitted to the distal end portion of the endoscope, there is a drawback that the outer diameter becomes large. In addition, water was easy to collect in the hood, and the drainage was poor.

[0007] Further, the one in which the nozzle and the objective cover glass are integrally formed to form one component is disclosed in Japanese Utility Model Laid-Open No. 57-42803, but it has the following drawbacks.

(1) Since the inner surface of the upper part of the ejection port is a plane parallel to the observation window, the ejected water and air do not eject toward the observation window, and most of the water and air are directed to the observation window. Since it jets out in a horizontal direction, the width of the water to be sent and the width of the air do not widen, and there is a drawback in that good washing power and ability to remove residual water cannot be obtained.

(2) To form the inner surface of the ejection port,
When molding by a general injection molding method, the inner surface of the jet outlet that is the undercut portion must use a slide mold, and when the outer surface of the cover glass and the inner surface of the jet outlet are continuous surfaces, During the opening process, the slide mold for forming the ejection port moves along the outer surface of the cover glass. Therefore, the slide mold is apt to be scratched by the outer surface of the cover glass, the dimensional accuracy of the outer surface of the cover glass is deteriorated, and desired optical performance cannot be obtained. In addition, the washability and the ability to remove residual water deteriorate.

On the other hand, the endoscope is cleaned and disinfected after being used in the body cavity of a patient, but this cleaning and disinfection takes a very long time. Therefore, in recent years, when performing an endoscopic examination, a disposable cover-type endoscope has been proposed instead of the conventional repeatedly-used endoscope.

This cover-type endoscope comprises a combination of an endoscope cover for covering the outer periphery of the endoscope insertion portion and the like, and a cover endoscope to be inserted into the endoscope cover.

This cover-type endoscope is packed in a soft packing material so that the sterilized state can be maintained. Therefore, the mounting bag for mounting the endoscope cover is stored in the container. However, since the mounting bag is stored in a spiral shape, the volume of the container is large.

Since the endoscope cover is in principle thrown away for each examination, a large number of endoscope covers are used in hospitals and examination institutions. When the volume of the container is large, a very large space is required for the transportation and storage of the container before and after the inspection. In addition, when it is discarded, it is bulky, and there is a problem that the disposability is poor.

The container is made of a hard material in order to prevent the contents from being deformed or damaged, or the container itself is made of a material having a function as a cushioning material against an external shock, or However, there is a problem that the cost of the container is increased because a cushioning material must be built in.

Further, since the endoscope cover is housed in a spiral shape, the insertion section cover has a bending tendency or a bending tendency, and it is difficult to insert the insertion section of the cover type endoscope into the insertion section cover. In addition, there is a problem that the bending performance is adversely affected during bending operation during inspection.

[0016]

As described above, in the conventional nozzle structure, it is necessary to cut a thin pipe or perform a bending process, or to manufacture a hood separately from the distal end portion of the endoscope. However, it is expensive because it takes time and labor to manufacture and automation of manufacturing is difficult.

Further, the above-mentioned structure in which the nozzle and the objective cover are integrally formed is likely to be manufactured at a relatively low cost, but in order to facilitate the manufacturing, the inner surface of the upper portion of the ejection port serves as an observation window. Since they are formed in parallel to each other, most of the water and air are jetted in a direction horizontal to the observation window, resulting in insufficient washing force and residual water removal capability.

Furthermore, since the slide mold used for molding by a general injection molding method moves along the outer surface of the cover glass, scratches are formed on the outer surface of the cover glass, and the dimension of the outer surface of the cover glass. There is a drawback that the accuracy becomes poor and the desired optical performance cannot be obtained. In addition, the washability and the ability to remove residual water deteriorate.

The present invention has been made in view of the above circumstances. Since water and air jetted from the nozzles are jetted toward the surface of the observation window, and the surface of the observation window is smooth and has high surface accuracy, It is an object of the present invention to provide an endoscope that has good cleaning power and ability to remove residual water and that can be manufactured in large quantities at low cost with a nozzle portion.

[0020]

SUMMARY OF THE INVENTION An endoscope of the present invention includes a fluid path for transferring a fluid, a tip forming member provided at the tip of an insertion section, and an optical window provided at the tip of the insertion section. In the endoscope having an optical window member having, and at least one fluid nozzle for ejecting a fluid to the optical window provided at the tip of the fluid path, a part of the tip constituting member, The fluid nozzle is configured from a part of the optical window member or at least one of the nozzle forming members, and the direction of ejecting the fluid toward the surface of the optical window is oblique to the surface of the optical window. At least one of the fluid nozzle and the optical window member is arranged and configured.

[0021]

According to the structure of the present invention, a tip forming member, an optical window member having an optical window, and a fluid nozzle are provided at the tip of the insertion portion, and a part of the tip forming member and the optical window member are provided. Of the fluid nozzle and at least one of the nozzle forming members, and since the inside of the fluid nozzle does not undercut during molding, a slide mechanism for molding the fluid nozzle is not required and the manufacturing is easy. In addition, it can be manufactured inexpensively and in large quantities by, for example, the injection molding method.

Further, according to the configuration of the present invention, by the arrangement and configuration of at least one of the fluid nozzle and the optical window member,
The direction in which the fluid is ejected is obliquely forward from the optical window toward the surface of the optical window. Therefore, it is possible to easily wash body fluid and dirt attached to the optical window and remove the attached water droplets.

[0023]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 7 relate to a first embodiment of the present invention, and FIG. 1 is a configuration diagram showing an overall configuration of an endoscope apparatus, FIG.
Is a front end side perspective view of the insertion section cover part, FIG. 3 is a front end side vertical sectional view of the cover type endoscope, FIG. 4 is a front end side vertical sectional view of the cover type endoscope, and FIG. 6 is a vertical cross-sectional view for explaining the flow of water, and FIG. 6 is a front view of the tip for explaining the flow of water.
FIG. 7 is a front view of the tip for explaining the flow of air supply.

The endoscope apparatus of this embodiment comprises a cover-type endoscope 1 and a fluid control device 2 to which the cover-type endoscope 1 is connected. The cover-type endoscope 1 includes a combination of an endoscope cover 3 and a cover endoscope 4 attached to the endoscope cover 3.

When performing an endoscopic inspection, the insertion portion of the cover endoscope 4 is covered by the clean endoscope cover 3, and the endoscope cover 3 is discarded after the inspection. on the other hand,
The cover endoscope 4 is covered with a new clean endoscope cover 3 and is used repeatedly.

The endoscope cover 3 includes a flexible insertion section cover section 5, a distal end cover section 6 provided at the tip of the insertion section cover section 5, and a base provided at the proximal end of the insertion section cover section 5. It is composed of the end component 7.

The tip cover portion 6 is provided with an air supply nozzle 8, a water supply nozzle 9 and a suction port 10.

A suction pipe line 11 is inserted through the insertion portion cover part 5. The suction pipe line 11 communicates with the suction port 10 on the distal end side, and the proximal end portion 7 on the proximal end side. It is communicated with the forceps insertion port 12 provided in the and is extended to the outside from the proximal end forming portion 7. The forceps insertion port 12 has a forceps plug 1
3 is detachably provided to block communication between the forceps insertion opening 13 and the atmosphere. Further, the air supply pipe line 14 and the water supply pipe line 15 are inserted into the insertion portion cover portion 5,
The tip side communicates with the air supply nozzle 8 and the water supply nozzle 9, respectively, and extends to the outside from the base end configuration portion 7.

The fluid control device 2 includes a suction control valve 1
6, a suction leak valve 17, an air supply control valve 18, an air supply leak valve 19, and a water supply control valve 20 are provided. These valves are configured by so-called pinch valve type electromagnetic valves that sandwich a flexible tube, through which a fluid forming the suction conduit 11 or the like flows, between valve bodies and open and close the flow path by crushing the flexible tube. ing.

Further, the fluid control device 2 has a control section 2 which controls the operation of these electromagnetic valves to perform air supply, water supply, and suction operations.
1, and an air supply pump 22 that sends air to the air supply line 14 and the like,
A light source 23 that supplies illumination light to the cover endoscope 4 is provided.

The cover endoscope 4 includes an elongated insertion portion 2
4 and an operating portion 25 which also serves as a grip portion and which is connected to the base end portion of the insertion portion 24. A universal cord 26 extends from a side portion of the operation portion 25, and a connector 27 is provided at an end portion of the universal cord 26, and the cover endoscope 4 is connected to the fluid control device 2 via the connector 27. It is supposed to be done.

The insertion section 24 and the operation section 2 of the cover endoscope 4
5, Inside the universal cord 26, the light guide 2
8 is provided, and the illumination light supplied by the light source 23 is guided by a light guide 28 to an illumination optical system 29 provided at the distal end portion of the endoscope 4, and the distal end of the endoscope cover 3 is provided. 2 which corresponds to an optical window provided in the cover portion 6
Through the lens cover part 35 shown in FIG. 3, the body cavity can be illuminated with the site to be examined.

An objective optical system 30 is arranged at the tip of the insertion section 24, and CC is placed at the image forming position of the objective optical system 30.
An image pickup device 31 such as D is arranged, and an optical image is formed on the image pickup surface of the image pickup device 31 by the objective optical system 30. This optical image is photoelectrically converted into an electrical signal by the image pickup device 31, is input to a signal processing device 33 such as a video processor through an image signal line 32, is converted into a standard video signal, and an endoscopic image is converted into an endoscopic image. It is adapted to be output to the monitor 34 for display. The signal processing device 33 and the light source 23 may be separate devices from the fluid control device 2.

The suction pipe line 11 is detachably attached to the suction control valve 16 and its proximal end side is connected to a suction bottle 46 provided near the fluid control device 2. This suction bottle 46
A suction source 45 is connected to the other side of the. Further, the suction pipeline 11 is branched from a suction leak pipeline 47 whose one end is open on the suction source 45 side with respect to the suction control valve 16, and the suction leak pipeline 47 is located in the middle of the opening with the suction pipeline 11. It is detachably attached to the suction leak valve 17.

The air supply line 14 is detachably attached to the air supply control valve 18, and the air supply pump 2 is installed more than the air supply control valve 18.
An air supply leak conduit 41 having an opening at one end is branched on the second side, and the air supply leak conduit 41 is detachably attached to the air supply leak valve 19 on the way to the opening. Also,
The air supply line 14 has an air supply pump 22 rather than the air supply control valve 18.
Inside the branch connector 42 provided on the side, a water supply pressurizing pipeline 44 having an open end connected to the water supply tank 43 branches, and then the base end side is connected to the air supply pump 22.

The water supply conduit 15 is detachably attached to the water supply control valve 20, and the base end side is connected to the water supply tank 43.

The endoscope operation section 25 is provided with an air / water supply switch 48 for instructing operation of air supply and water supply, and a suction switch 49 for instructing operation of suction.

The air / water supply switch 48 is composed of a two-stage switch. When the switch is pushed in one step, the switch (not shown) is turned on, and when pushed in two steps, the switch (not shown) is turned on. These switches are control signal lines 5 arranged in the universal cord 26.
Is electrically connected to the control unit 21 of the fluid control device 2 via 0, and air supply and water supply are performed via the control unit 21 by remote control from the air supply / water supply switch 48 and the suction switch 49.
It is possible to control suction.

2 to 4 show the structure of the distal end cover portion 6 of the insertion portion cover portion 5.

The tip cover portion 6 is composed of a lens cover portion 35 which is the optical window member and a tip portion main body 51 which is the tip constituent member in which the endoscope tip portion 36 is housed. As shown in FIG. 4, the lens cover portion 35 is integrally provided with an air supply nozzle upper surface portion 52 and a water supply nozzle upper surface portion 53, and is injection molded with a transparent optical resin such as PMMA, PC, PS or the like. It is molded by the method. An air supply nozzle lower surface portion 54 is integrally provided on the tip portion main body 51, and an air supply port 55 communicating with the air supply pipeline 14 is opened. In addition, the water jet nozzle lower surface 5
6 is provided, and a water supply port 57 communicating with the water supply pipeline 15 is opened. Further, a suction port 10 communicating with the suction pipe line 11 is provided.

The lens cover portion 35 is watertightly and airtightly joined to a lens cover receiving portion 58 provided on the tip end main body 51 by adhesion or welding. The air supply nozzle 8 is formed from the air supply nozzle upper surface portion 52 and the air supply nozzle lower surface portion 54 in a state where the lens cover portion 35 and the tip end portion main body 51 are joined. The water supply nozzle 9 is formed from the water supply nozzle upper surface portion 53 and the water supply nozzle lower surface portion 56.

A part of the water supply nozzle upper surface portion 52 and a part of the water supply nozzle upper surface portion 53 are formed as an inclined surface having an angle α with respect to the surface of the lens cover portion 35, for example, 5 ° to 30 °. There is.

Further, a part of the air supply nozzle lower surface portion 54 and a part of the water supply nozzle lower surface portion 56 are formed as an inclined surface having an angle β with respect to the surface of the lens cover portion 35, for example, an angle of 0 ° to 30 °. ing. For this reason, the outflow direction of the fluid of the air supply nozzle 8 and the water supply nozzle 9 is configured to flow out obliquely in front of the lens cover portion 35 with respect to the surface of the lens cover portion 35.

Further, as shown in FIG. 3, the air supply nozzle 8 and the water supply nozzle 9 open toward substantially the same point in the center of the observation visual field range 59 on the surface of the lens cover portion 35.

In the above structure, when blood in the body cavity, body fluid such as mucus, or dirt adheres to the observation visual field range 59 on the surface of the lens cover portion 35 during the inspection, the water supply nozzle 9
It is removed by sending water from.

When a water supply operation is instructed by the air supply / water supply switch 48 provided in the operation section 25, the cleaning water pressure-fed by the fluid control device 2 is supplied from the water supply port 57 through the water supply pipe 15 to the water supply nozzle. 9 is pumped. 5 and 6
As shown in FIG. 5, the washing water has its flow direction changed by the water supply nozzle upper surface portion 53 and the water supply nozzle lower surface portion 56, and is jetted obliquely from the front side to the surface of the lens cover portion 35.

The sprayed cleaning water is collected by the lens cover portion 35.
The width of the flow is enlarged by hitting the lens obliquely from the front, and then the observation visual field range 5 is formed along the surface of the lens cover portion 35.
9 to wash away body fluids and dirt attached to the observation visual field range 59.

If body fluid or dirt on the surface of the lens cover portion 35 is washed away by a water supply operation, water droplets attached to the surface of the lens cover portion 35 may remain in the observation visual field range 59. This is removed by air supply from the nozzle 8.

That is, when the air supply / water supply switch 48 provided on the lens cover 35 is instructed to supply air,
The air pressure-fed by the fluid control device 2 is the air feeding line 14
Via the air supply port 55 to the air supply nozzle 8 under pressure. As shown in FIGS. 5 and 7, air has its flow direction changed by the air supply nozzle upper surface portion 52 and the air supply nozzle lower surface portion 54, and is jetted obliquely forward from the surface of the lens cover portion 35.

The jetted air hits the lens cover portion 35 obliquely from the front to widen the width of the flow.
The water flows along the surface of the lens cover portion 35 toward the observation visual field range 59 and blows off water droplets attached to the observation visual field range 59.

According to the above structure, in the present embodiment, the air supply nozzle 8 includes the air supply nozzle upper surface portion 52 and the air supply nozzle lower surface portion 54.
Further, the water supply nozzle 9 is divided into a water supply nozzle upper surface portion 53 and a water supply nozzle lower surface portion 56, and the lens cover portion 35 is integrally provided with the air supply nozzle upper surface portion 52 and the water supply nozzle upper surface portion 53, and the tip portion main body 51. Further, the lower surface portion 54 of the air supply nozzle and the lower surface portion 56 of the water supply nozzle are integrally provided. With this configuration, the internal space of the air supply nozzle 8 or the water supply nozzle 9 does not become an undercut portion as in the conventional example, and therefore a slide mechanism that may move on the surface of the lens cover portion 35 and damage the surface, or a complicated structure. The air supply nozzle 8 and the water supply nozzle 9 can be easily formed without using a slide mechanism, and the optical performance is not affected. Further, since the air supply nozzle 8 and the water supply nozzle 9 are formed by assembling the lens cover portion 35 and the tip end portion main body 51, the number of parts forming the tip end cover portion 6 is reduced and the labor for assembling is reduced. The tip cover portion 6 can be manufactured very inexpensively.

Further, the air supply nozzle upper surface portion 52, the water supply nozzle upper surface portion 53, the air supply nozzle lower surface portion 54, the water supply nozzle lower surface portion 5
Since a part of 6 is inclined with respect to the surface of the lens cover portion 35, water and air are jetted toward the surface of the lens cover portion 35, so that the lens cover portion 35 is washed and air is supplied. Water drops can be reliably removed. Further, since the width of the water supply and the width of the air supply can be widened, it is possible to surely clean the lens cover portion 35 over a wide range and remove the water droplets. Further, since the air supply nozzle 8 and the water supply nozzle 9 are opened toward the center of the observation visual field range, the entire visual field range 59 can be reliably washed, and they remain attached to the visual field range. Water drops can be reliably removed. Therefore, the observation performance is good, and it can be manufactured at low cost.

Further, since it is not necessary to provide a cord or the like at the tip portion, the diameter of the tip portion can be reduced and water does not collect, so that water droplets can be easily removed.

8 and 9 relate to the second embodiment of the present invention. FIG. 8 is a perspective view of the distal end side of the insertion section cover, and FIG. 9 is a longitudinal sectional view of the distal end side of the cover type endoscope.

The second embodiment is different from the first embodiment only in the structure of the joint portion between the lens cover portion 35 and the tip portion main body 51. Other configurations and operations similar to those of the first embodiment are designated by the same reference numerals and description thereof will be omitted.

As shown in FIGS. 8 and 9, the lens cover portion 3
The outer diameter of 5 is substantially the same as the outer diameter of the tip body 51, and a convex portion 60 is formed on the back surface and outer periphery of the lens cover portion 35. A concave portion 61, into which the convex portion 60 of the lens cover portion 35 is fitted, is provided on the outer periphery of the joint surface with the lens cover portion 35 in the distal end portion main body 51.

In the lens cover portion 35 and the tip portion main body 51, the air supply nozzle upper surface portion 52 and the air supply nozzle lower surface portion 54 form a flow path, and the water supply nozzle upper surface portion 53 and the water supply nozzle lower surface portion 56. Positioned so as to form a flow path, the back surface of the lens cover portion 35 and the tip portion main body 51 are water-tightly and airtightly connected and fixed by means such as adhesion or welding.

When the lens cover portion 35 and the tip portion main body 51 are connected to each other, the surface of the lens cover portion 35 is formed as a continuous surface up to the outer peripheral surface of the tip portion main body 51. There is no joint or step in the vicinity of the observation visual field range 59 on the surface of 35.

In the above structure, the vicinity of the visual field range 59 has a smooth surface without seams or steps, so that even if body fluid or dirt adheres to the lens cover portion 35, if water is sent, Since it does not adhere to seams or steps, these can be easily washed and removed. Similarly, it is difficult for water drops to adhere due to the water supply, and even if the water drops adhere, the water drops can be easily removed by air supply from the air supply nozzle 8. Other functions are the same as those in the first embodiment.

In this embodiment, in addition to the effects of the first embodiment,
Further, dirt and body fluids attached to the lens cover portion 35 can be easily washed, water droplets remaining on the lens cover portion 35 due to water supply can be prevented from remaining, and water droplets can be easily removed by air supply to maintain good observation performance. be able to.

10 and 11 relate to the third embodiment of the present invention. FIG. 10 is a front view of the distal end of the insertion portion cover portion, and FIG. 11 is a longitudinal sectional view of the distal end side of the cover type endoscope.

The third embodiment is different from the first embodiment only in the structure of the tip cover portion 6, and in other respects, the same structures and operations as those in the first embodiment will be designated by the same reference numerals. Omit it.

As shown in FIGS. 10 and 11, the tip cover portion 6 is a lens cover portion 35 which is an optical window made of a transparent optical resin such as PMMA, PC, PS, and the like. With low reflectance, for example, colored PMM such as black
A tip body 51 made of a resin such as A, PC, PS, modified PPO, or polysulfone is integrally molded at the time of molding. That is, the tip cover 6 is composed of the lens cover-integrated tip portion main body 67 which is the tip constituting member integrally formed by an injection molding method such as a two-color molding method or an insert molding method, and a nozzle forming member 68. There is.

In order to prevent flare from occurring, the distal end main body 51 blocks the optical path of the illumination light passing through the cross section of the lens cover portion 35 in the vicinity of the observation visual field range 59 to prevent the illumination light from entering the objective optical section 30 and to prevent flare. The light shielding member 63 is provided. or,
The tip portion main body 51 is provided with an air supply nozzle lower surface portion 54 and a water supply nozzle lower surface portion 56.

On the other hand, the nozzle forming member 68 is integrally provided with the air supply nozzle upper surface portion 52 and the water supply nozzle upper surface portion 53, and is injection-molded by a resin such as PMMA, PC, PS, modified PPO, or polysulfone. Is molded by.

The nozzle forming member 68 is fixed to the lens cover-integrated front end portion main body 67 by means such as adhesion or welding, and in the fixed state, the air supply nozzle upper surface portion 52.
The air supply nozzle 8 is formed from the air supply nozzle lower surface 54 and the water supply nozzle upper surface 53 and the water supply nozzle lower surface 56.
Thus, the water supply nozzle 9 is formed.

The lens cover portion 3 is provided on the opening side portion of the air supply nozzle upper surface portion 52 and the opening side portion of the water supply nozzle upper surface portion 53.
5 is formed as an inclined surface having an angle α, for example, an angle of 5 ° to 30 °. Therefore, the outflow direction of the fluid from the air supply nozzle 8 and the water supply nozzle 9 is configured to flow obliquely from the front of the lens cover portion 35 with respect to the surface of the lens cover portion 35.

The rest of the configuration, function and effect are the same as those of the first embodiment, and the explanation is omitted.

12 to 14 relate to the fourth embodiment of the present invention, FIG. 12 is a front view of the insertion portion cover portion, and FIG. 13 is a longitudinal sectional view of the distal end side of the cover type endoscope at a position including an optical system. Figure,
FIG. 14 is a vertical cross-sectional view of the tip of the cover-type endoscope at the position including the nozzle.

The fourth embodiment is different from the first embodiment only in the structure of the tip cover portion 6, and in other respects, the same structures and operations as those in the first embodiment will be designated by the same reference numerals. Omit it.

As shown in FIGS. 12 to 14, the tip cover portion 6 is made of a transparent optical resin such as PMMA, PC, PS or the like, and the lens cover portion 35 formed by injection molding and the PMMA, It has a tip portion main body 51 molded by injection molding with a resin such as PC, PS, modified PPO, or polysulfone. An objective lens cover portion 66 is provided in the lens cover portion 35 at a position facing the front end side of the objective optical system 30 of the cover endoscope 4.

At the front end surface of the lens cover portion 35,
The objective lens cover portion 66 is configured to protrude toward the front end side within a range of, for example, about 0.1 to 0.3 mm from the other portions of the lens cover portion 35. Lens cover part 3
Reference numeral 5 covers the objective optical system 30 and the illumination optical systems 29, 29 with a single member, so that the surface area is large, and the lens cover portion 3 is used for water supply by the water supply nozzle or air supply by the air supply nozzle.
It is difficult to reliably cover the entire surface of No. 5.

Therefore, the air supply nozzle 8 and the water supply nozzle 9
Is directed toward the objective lens cover portion 66, but in this case, water droplets due to water supply may adhere to the body fluid or dirt that cannot be washed and removed on the outer peripheral portion of the lens cover portion 35, and water droplets may not be removed even by air supply. is there. During the inspection, these water droplets cause the observation visual field range 5 of the objective lens cover portion 66.
Moving to 9, water droplets enter the observation visual field, which hinders observation. However, in the configuration of the present embodiment, the objective lens cover portion 66 is configured to project toward the tip side more than the other portions of the lens cover portion 35, and therefore the objective lens cover portion 66 and the lens cover portion 35. A water drop is caught on a step between the other parts of the above, and the water drop moves over the step and moves onto the surface of the objective lens cover portion 66 and does not adhere to it, so that a good visual field can be secured.

The tip portion main body 51 accommodates the endoscope tip portion 36 and is provided with the suction port 10 which communicates with the suction conduit 11.

Further, the tip end main body 51 is provided with an air supply nozzle upper surface portion 52 and a water supply nozzle upper surface portion 53. A part of the air supply nozzle upper surface part 52 and a part of the water supply nozzle upper surface part 53 are configured as an inclined surface having an angle α with respect to the surface of the lens cover part 35, for example, an angle in the range of 5 ° to 30 °. . Further, a lens cover receiving portion 58 which is a joint portion of the lens cover portion 35 is provided.

The lens cover portion 35 is the lens cover portion 35.
Is arranged so as to face the upper surface portion 52 of the air supply nozzle and the upper surface portion 53 of the water supply nozzle extending on the surface of the above, and is water-tightly and airtightly connected and fixed to the tip end main body 51 by means such as adhesion or welding. . In this fixed state, the air supply nozzle upper surface portion 52 and the water supply nozzle upper surface portion 53 extend on the outer surface of the lens cover portion 35. Of the outer surface of the lens cover portion 35, the portion covered by the air supply nozzle upper surface portion 52 extending on the outer surface constitutes an air supply nozzle lower surface portion 54, and the air supply nozzle upper surface portion 52 and the air supply nozzle lower surface. The air supply nozzle 8 is formed from the portion 54. Further, the water supply nozzle 9 is similarly formed from the water supply nozzle upper surface portion 53 and the water supply nozzle lower surface portion 56.

According to the structure of this embodiment, the air supply nozzle 8 is divided into the air supply nozzle upper surface portion 52 and the air supply nozzle lower surface portion 54, and the water supply nozzle 9 is divided into the water supply nozzle upper surface portion 53 and the water supply nozzle lower surface portion 56. The tip portion main body 51 is integrally provided with the air supply nozzle upper surface portion 52 and the water supply nozzle upper surface portion 53, respectively, and the lens cover portion 35 is integrally provided with the air supply nozzle lower surface portion 54 and the water supply nozzle lower surface portion 56, thereby forming a lens. The air supply nozzle 8 and the water supply nozzle 9 are formed when the cover portion 35 and the tip portion main body 51 are assembled. Therefore, when molding the lens cover portion 35, there is no need for a slide mechanism that moves on the surface of the lens cover portion 35 and may damage the surface, as in the conventional example, and thus the optical performance is affected. Never give.

If a slide mechanism is used during the molding of the tip portion main body 51, the water or air in the air supply nozzle 8 or the water supply nozzle 9 is more than the space inside the air supply nozzle 8 or the water supply nozzle 9 as in the present embodiment. It is possible to form a narrower opening from which the water is ejected. Therefore, in the conventional example, the slide mechanism for molding the inside cannot be used, and the molding cannot be performed by the injection molding with the resin. On the other hand, according to the configuration of this example, the air feeding nozzle 8 and the water feeding can be easily performed. The nozzle 9 can be formed.

Further, the lens cover portion 35 and the tip portion main body 51
Since the air supply nozzle 8 and the water supply nozzle 9 are formed by assembling the above, the number of parts forming the tip cover portion 6 can be reduced and the labor for assembling can be reduced. Therefore, the tip cover portion 6 can be manufactured at a very low cost. It is possible. Further, since a part of the air supply nozzle upper surface portion 52 and a part of the water supply nozzle upper surface portion 53 are configured as an inclined surface with respect to the surface of the lens cover portion 35, during air supply operation and water supply operation, Water and air are surely jetted toward the surface of the lens cover portion 35. Therefore, it is possible to easily wash the objective lens cover portion 66 with water and remove water droplets with air.

Further, since the width of the water supply and the width of the air supply can be widened on the surface of the lens cover portion 35, it is possible to reliably wash the wide range of the objective lens cover portion 66 and remove the water droplets.

Further, since the air supply nozzle lower surface portion 54 and the water supply nozzle lower surface portion 56 and the outer surface of the lens cover portion 35 are flat and continuous surfaces without stepped portions or gaps, body fluid or dirt adheres to them. However, it can be easily washed, water droplets do not easily adhere, and even if they adhere, they can be easily removed.

Further, since the lens cover portion 35 is abutted and fixed to the air supply nozzle upper surface portion 52 and the water supply nozzle upper surface portion 53, the lens cover portion 35 is unlikely to drop into the body cavity.

FIG. 15 is a vertical sectional view of the distal end side of the cover type endoscope according to the fifth embodiment of the present invention.

In the fifth embodiment, the shapes of the air supply nozzle upper surface portion 52 and the water supply nozzle upper surface portion 53 provided on the tip end portion main body 51 of the tip end cover 6 and the shape of the lens cover portion 35 are different from each other. The same configurations and operations as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted.

As shown in FIG. 15, the air supply nozzle upper surface portion 52 and the water supply nozzle upper surface portion 5 provided on the tip portion main body 51.
3 is provided as a surface substantially horizontal to the tip surface of the tip body 51.

The lens cover portion 35 is water-tightly and airtightly connected and fixed to the lens cover receiving portion 58 provided on the distal end portion main body 51 by means such as adhesion or welding, and in this state, the lens cover portion 35. Is formed as an inclined surface having an angle α with respect to the air supply nozzle upper surface portion 52 and the water supply nozzle upper surface portion 53, for example, an angle in the range of 2 ° to 30 °. Further, the air supply nozzle upper surface portion 52 and the water supply nozzle upper surface portion 53 respectively extend on the surface of the lens cover portion 35.

Of the outer surface of the lens cover portion 35, the portion covered by the air supply nozzle upper surface portion 52 extending on the outer surface constitutes the air supply nozzle lower surface portion 54. A portion covered by the water supply nozzle upper surface portion 53 extending in the same manner constitutes a water supply nozzle lower surface portion 56.

The air supply nozzle 8 is formed by the air supply nozzle upper surface portion 52 and the air supply nozzle lower surface portion 54, and the water supply nozzle upper surface portion 53 and the water supply nozzle lower surface portion 56 are formed by the water supply nozzle 9. .

The objective optical system 30 provided on the cover endoscope 4 36 may be a perspective optical system for observing a direction inclined by the angle α with respect to the tip direction of the endoscope tip portion 36.
If the angle α is small, the distance between the objective optical system 30 and the lens cover portion 35 is small, and there is no optical adverse effect. Therefore, it is used as a direct-view optical system for observing the distal direction of the endoscope distal end portion 36. Good.

The air supply nozzle lower surface portion 54 is the air supply nozzle upper surface portion 52 extending on the outer surface of the lens cover portion 35.
It may be constituted by a portion covered by the above and a part of the tip portion main body 51.

The rest of the configuration, functions and effects are the same as those of the fourth embodiment, and the explanation thereof is omitted.

The present invention is not limited to the endoscope cover of the cover type endoscope, and the same effect can be obtained by using the same configuration at the tip portion of a normal endoscope.
That is, in each embodiment, the lens cover portion 35 of the cover endoscope 4 is used as the most advanced optical lens of the objective optical system provided at the distal end portion of the endoscope, and the distal end body 51 of the cover endoscope 4 is used. May be configured as a distal end main body of an endoscope that houses the optical members such as the objective optical system and the illumination optical system, the solid-state image pickup device, and the like.

Further, not only a flexible endoscope but also a rigid endoscope having a hard insertion portion or a cover type rigid mirror may be used, and an optical window member having an optical window at its tip and an optical window member separate from each other may be used. A fluid nozzle is formed from a part of the optical window member and a part of the tip forming member, and a fluid ejected from the nozzle is ejected obliquely forward from the optical window toward the surface of the optical window. It suffices that the nozzle has an upper surface portion and a lower surface portion.

Further, the number of fluid nozzles may be one instead of plural, and the air supply pipe and the water supply pipe are merged in the vicinity of the tip end so as to communicate with one nozzle so that water and air are ejected from one nozzle. It may be configured to be possible.

The optical window member such as the lens cover portion 35 is not limited to the optical resin and may be made of optical glass as long as a part of the nozzle can be integrally formed. The tip forming member such as the nozzle forming member 68 may be made of not only resin but also metal, ceramic or the like as long as a part of the nozzle can be integrally formed.

Next, a sixth embodiment will be described. FIG.
6 to 18 show a package 70 for housing, transporting and storing the endoscope cover 3.

As shown in FIG. 17, this package 70 includes a sterilization pack 71 for storing the endoscope cover 3 in a sterilized state, PET (polyethylene taffetalate) and PE (polyethylene) for storing the sterilization pack 71. And a bag member 72 made of a recyclable polymer material.

As shown in FIG. 18, the sterilization pack 71 is
At least partially breathable but impermeable to bacteria,
The base member 73 is made of a polymer material or paper having a ventilation hole of 0.2 μm or less, and the lid member 74 is made of a recyclable polymer material such as PET or PE.

The endoscope cover 3 is a flexible insertion portion cover portion 5.
Is held by the base member 73 in a state of being held at a natural length, the distal end cover portion 6 and the base end constituent portion 7 are fixed to the base member 73 by the fixing tape member 75, and the lid member 74 is covered.

Further, the outer edge portion of the lid member 74 is attached to the base member 7
The outer edge portion of 3 is attached by welding such as heat sealing or adhesion to seal the endoscope cover 3.

The sterilization pack 71 is sterilized by means such as ethylene oxide sterilization after the endoscope cover 3 is sealed, and the endoscope cover sealed in the sterilization pack 71 is sterilized. Is kept sterile until it is opened.

The sterilization pack 71 is stored in the bag member 72 after being sterilized. After the air inside the bag member 72 is degassed, the bag member 72 is fed with at least an amount of gas that is not toxic to the human body, such as carbon dioxide gas or nitrogen gas, which is equal to or larger than the volume of the bag member 72 in the natural state. Then, the edge portion of the opening of the bag member is bonded by means such as welding or adhesion, and the sterilization pack 71 and the enclosed gas are sealed while the inside of the bag member 72 is pressurized.

When the inside of the endoscope cover 3 has moisture, the cover endoscope 4 is attached to the endoscope cover 3 and
When the inspection is performed, the lens cover portion 35 may be fogged so that the observation cannot be performed. Therefore, in the present embodiment, the bag member 72 is filled with the desiccant 76 to keep the inside of the bag member 72 and the inside of the endoscope cover 3 in a dry state. Therefore, the lens cover portion 35 does not fog during the inspection.

In the above structure, since the package 70 is kept under pressure during transportation and storage, the outer shape of the flexible bag member is maintained, so that the package 70 can be easily handled even when it is packed in a cardboard or the like. In addition, the package 70 is not crushed, and the enclosed gas absorbs the impact from the outside, so that the endoscope cover 3 is not damaged.

Since the endoscope cover 3 is fixed so that the insertion portion cover portion 5 has a natural length, the package 7
Since the endoscope cover 3 is not exposed inside the 0 and the insertion portion cover portion 5 is not crushed or broken, there is no tendency to bend or break.

When the package 70 is damaged during transportation or storage, the gas sealed in the bag member 72 under pressure is ejected from the damaged part to the outside, so that the package 7
Since 0 is a deflated state, the endoscope cover 3 which may not be kept sterilized can be recognized at a glance, and the endoscope cover 3 which is not sterilized is not used for inspection. It's safe.

During endoscopic inspection, the bag member 72 is opened and the sterilization pack 71 is taken out.
One end of the endoscope is opened, and the insertion section 24 of the cover endoscope 4 is inserted into the endoscope cover 3 from the proximal end configuration section 7 in a state of being fixed inside the sterilization pack 71 through the opened mouth. With the cover 3 still covered with the sterilization pack 71, the mounting of the endoscope cover 3 and the cover endoscope 4 is completed.

When the cover endoscope 4 with the endoscope cover 3 attached thereto is pulled out from the sterilization pack 71 immediately before the start of the inspection,
The fixing tape member 75 is disengaged, the endoscope cover 3 is disengaged from the base member 73, and the sterilization pack 71 can be detached from the cover endoscope 4 to which the endoscope cover 3 is attached, and the inspection can be started. it can.

By removing the sterilization pack 71 from the endoscope cover 3 immediately before the inspection, it is possible to prevent the endoscope cover 3 from being contaminated when the endoscope cover 3 is attached to the cover endoscope 4. Since it is possible to use the sterilized endoscope cover 3 with certainty, there is no risk of contamination of the patient, which is safe.

Sterilized pack 71 and bag member 7 removed
When the content 2 is empty, it becomes a simple sheet-like form, so that it has almost no volume and little space for disposal. Even when these are collected and reused, there is little space for transportation and storage.

According to the above-mentioned structure, the insertion portion cover portion 5 is not bent or bent, and the cover endoscope 4 and the endoscope cover 3 can be easily attached, and the bending operation can be performed. Since the bending performance is not adversely affected even at times, it is possible to provide an endoscope device with good operability.

Further, since the endoscope cover 3 which is not in a sterilized state is not used for inspection, a safe endoscope device can be provided. Further, it is possible to provide an inexpensive endoscope cover package that has good disposability, has a small storage space and a small space for transportation.

[0113] The endoscope cover is not damaged during transportation and storage, has a small space for transportation and storage, and is a disposable and inexpensive endoscope cover package. Can be provided.

Further, it is possible to provide a safe endoscope cover package that can be used for inspection in a state where the endoscope cover is surely sterilized.

[Appendix] As described in detail above, according to the embodiment of the present invention, the following constitution can be obtained.
That is, (1-1) a fluid path for transferring a fluid, a tip constituent member provided at the tip of the insertion portion, an optical window member having an optical window, and the optical window provided at the tip of the fluid path. In the endoscope having at least one fluid nozzle for ejecting a fluid to, the fluid nozzle is formed from a part of the tip forming member and at least one of the optical window member or the nozzle forming member. At least one of the fluid nozzle and the optical window member is arranged such that the direction of ejecting the fluid toward the surface of the optical window is oblique to the surface of the optical window. ,Endoscope.

(1-2) An endoscope having an optical system and an endoscope cover for covering the insertion part of the endoscope are provided, and a fluid path for transferring a fluid and the insertion part of the insertion part. In the endoscope cover, a tip forming member that covers the tip, an optical window member having an optical window arranged to face the optical system, at least one fluid nozzle for ejecting a fluid to the optical window, and the endoscope cover. In the provided cover-type endoscope, the fluid nozzle is formed from a part of the tip forming member and at least one of a part of the optical window member or a nozzle forming member, and on the surface of the optical window. A cover-type endoscope in which at least one of the fluid nozzle and the optical window member is arranged so that the direction in which the fluid is ejected is oblique to the surface of the optical window.

(2) The fluid path for transferring the fluid, the tip forming member provided at the tip of the insertion portion, the optical window member having the optical window, and the optical window provided at the tip of the fluid path. At least one fluid nozzle for ejecting fluid,
In the endoscope having, the fluid nozzle has a nozzle lower surface portion in which one end of the fluid passage is opened, and a nozzle upper surface portion facing the nozzle lower surface portion and changing the flow direction of the fluid flowing out from the opening of the fluid passage. And the upper surface of the nozzle is a part of the tip forming member, or a part of the optical window member or a nozzle forming member, the lower surface of the nozzle is a part of the tip forming member or the optical window member. At least one of the fluid nozzle and the optical window member is arranged such that the fluid nozzle is formed of at least one part and the direction of ejecting the fluid toward the surface of the optical window is oblique to the surface of the optical window. The endoscope that is configured.

(3) An endoscope having an optical system and an endoscope cover for covering the insertion portion of the endoscope are provided, and a fluid path for transferring a fluid and a tip of the insertion portion are provided. Provided on the endoscope cover, a tip forming member for covering, an optical window member having an optical window arranged to face the optical system, at least one fluid nozzle for ejecting a fluid to the optical window, and the endoscope cover. In the covered endoscope, the fluid nozzle includes a nozzle lower surface portion having one end of the fluid passage opened, and a nozzle facing the nozzle lower surface portion and changing a flow direction of a fluid flowing out from the opening of the fluid passage. And an upper surface portion, the nozzle upper surface portion is a part of the tip component member or a part of the optical window member or a nozzle forming member,
The lower surface of the nozzle comprises at least one of a part of the tip forming member and a part of the optical window member, and the direction of ejecting the fluid toward the surface of the optical window is oblique to the surface of the optical window. Thus, the cover-type endoscope in which at least one of the fluid nozzle and the optical window member is arranged and configured.

(4) The endoscope or the remark 1-wherein the optical window member and the tip forming member are integrally formed.
The cover-type endoscope described in 2.

(5) The optical window member and the tip forming member are integrally formed, the portion corresponding to the tip forming member is made of an optically opaque resin, and the portion corresponding to the optical window member is transparent. The endoscope or appendix 1 according to appendix 1-1, which is integrally formed by a two-color injection molding method using a resin.
-2.

(6) The endoscope according to appendix 1-1 or the cover-type endoscope according to appendix 1-2, wherein the optical window member is arranged so as to cover the entire front surface of the tip constituting member.

The endoscope or cover-type endoscope described in appendix 6 eliminates gaps, steps, or adhesive protrusions near the outer surface of the optical window, so that body fluids and dirt can be collected near the outer surface of the optical window. Is less likely to adhere, the fluid such as water does not collect, the residual water removal performance is good, and it can be manufactured in large quantities and at low cost.

(7) The endoscope according to appendix 2 or the cover according to appendix 3, wherein the upper surface of the nozzle is formed of the nozzle forming member, and the lower surface of the nozzle is formed of a part of the tip forming member. Type endoscope.

With the structure described in appendix 7, since the inside of the fluid nozzle is not undercut during molding, a slide mechanism for molding the fluid nozzle is not required, and the mold for molding is simple. It is inexpensive and can be manufactured in large quantities.

(8) The endoscope or appendix 3 according to appendix 2, wherein the upper surface of the nozzle comprises a part of the optical window member and the lower surface of the nozzle comprises a part of the tip forming member. The cover-type endoscope described in.

With the structure described in appendix 8, since the inside of the fluid nozzle is not undercut during molding, a slide mechanism for molding the fluid nozzle is not required, and the mold for molding becomes simple. It is inexpensive and can be manufactured in large quantities.

(9) The additional surface of the nozzle is formed of the nozzle forming member, and the lower surface of the nozzle is formed of a part of the tip forming member integrally formed with the optical window member. Or the cover-type endoscope according to Appendix 3.

(10) The endoscope according to appendix 2 or the cover according to appendix 3, wherein the upper surface of the nozzle comprises a part of the tip forming member and the lower surface of the nozzle comprises a part of the optical window member. Type endoscope.

(11) The endoscope or the statement according to Appendix 2, wherein at least the opening side of the fluid flow path in which the fluid is ejected is formed obliquely to the surface of the optical window in the nozzle upper surface portion. The cover-type endoscope according to item 3.

(12) In the nozzle upper surface portion, at least the opening side of the fluid flow path through which the fluid is ejected is formed obliquely with respect to the tip surface of the tip component member.
Or the cover-type endoscope according to Appendix 3.

(13) The endoscope or the appendix according to appendix 2, wherein at least the opening side of the fluid flow passage in which the fluid is ejected is formed obliquely to the surface of the optical window in the lower surface of the nozzle. The cover-type endoscope according to item 3.

(14) In the lower surface portion of the nozzle, at least the opening side of the fluid flow path from which the fluid is ejected is formed obliquely to the tip surface of the tip component member.
Or the cover-type endoscope according to Appendix 3.

(15) The endoscope according to appendix 2 or the appendix 3, wherein the surface of the optical window of the optical member is obliquely arranged with respect to the flow path of the fluid in the upper surface of the nozzle. Cover-type endoscope.

(16) The endoscope according to appendix 2 or the cover according to appendix 3, wherein the surface of the optical window of the optical member is arranged obliquely with respect to the tip surface of the tip forming member. Type endoscope.

(17) The endoscope according to appendix 1-1, wherein two or more fluid nozzles are provided, and the openings of the fluid nozzles open toward substantially the same point on the surface of the optical window. ,
Any one of the cover-type endoscope described in Appendix 1-2, the endoscope described in Appendix 2, or the cover-type endoscope described in Appendix 3.

The endoscope or cover-type endoscope described in appendix 17 has, for example, a nozzle for supplying water and a nozzle for supplying air as the two fluid nozzles, and these nozzles are located at the center of an optical window, for example, an observation window. Since the openings are directed toward substantially the same point, the ejection of gas from the air supply nozzle and the ejection of water from the water supply nozzle are performed in substantially the same area of the optical window. Therefore,
The optical window member has good cleaning ability in the visual field range and ability to remove residual water, and can be manufactured in large quantities and at low cost.

(18) The cover-type endoscope according to appendix 1-2 or appendix 3, wherein the insertion portion of the endoscope is made of a flexible member, and the endoscope cover is made of a flexible member.

(19) The cover-type endoscope according to appendix 1-2 or appendix 3, wherein the insertion portion of the endoscope is made of a hard member, and the endoscope cover is made of a hard member.

(20) An endoscope cover package for transporting and storing an endoscope cover that covers the insertion portion of the endoscope, wherein the endoscope cover package is made of a soft bag member having airtightness. Endoscope cover package.

(21) The endoscope cover package according to attachment 20, wherein after the endoscope cover is housed, gas is sealed in the bag member so that the inside of the package is in a pressurized state.

In the structure described in appendix 21, since the inside of the flexible bag member is filled with gas so as to be in a pressurized state and the endoscope cover is housed, impact from the outside during transportation and storage. Since the enclosed gas is absorbed, the endoscope cover is not damaged.

Further, after the endoscope cover is taken out, the package loses gas and becomes a sheet form and is discarded.

(22) With the endoscope cover stored,
21. The endoscope cover package according to attachment 20, wherein a sterilization pack for sterilizing the endoscope cover is stored in the bag member.

(23) The endoscope cover package according to attachment 20, wherein the sterilized pack has air permeability in at least a part thereof and also has air holes through which bacteria cannot pass.

In the structure described in Appendix 22 or Appendix 23,
Since the endoscope cover is kept sterile until just before use,
It is hygienic because the endoscope cover can be used from the sterilized state.

(24) The inside of the appendix 20 in which the endoscope cover is housed in a state where the length of the insertion portion cover portion that covers the endoscope insertion portion of the endoscope cover is kept at a natural length. Endoscope cover package.

(25) Note 20 provided with a fixing member for fixing the distal end constituent portion and the proximal end constituent portion of the endoscope cover in place.
The endoscope cover package described in.

(26) The endoscope cover package according to attachment 20, wherein the bag member is provided with an opening for inserting the endoscope cover and the insertion portion of the endoscope when the endoscope is mounted.

(27) The endoscope cover package according to attachment 21, wherein the gas sealed in the bag member is carbon dioxide gas.

(28) The endoscope cover package according to attachment 21, wherein the gas sealed in the bag member is nitrogen gas.

(29) The endoscope cover package according to attachment 20, wherein the cover package is made of a recyclable polymer material.

In the structure described in appendix 29, the material used for the package can be recycled and the disposability can be improved.

(30) The endoscope cover package according to attachment 20, wherein the bag member has a desiccant enclosed therein.

With the configurations described in appendices 20 to 30, the endoscope cover is not damaged, the space for transportation and storage is small, the cost is low and the disposability can be improved.

With the structure described in appendix 30, the inside of the package can be dehumidified to prevent the optical member of the endoscope cover from being fogged, and the observation performance of the endoscope can be kept good.

[0156]

As described above, according to the endoscope of the present invention, the ability of cleaning the observation window by supplying water from the nozzle and removing water droplets adhering to the surface of the observation window by supplying air from the nozzle are improved. Therefore, the manufacturing observation performance can be improved, and the nozzle portion can be mass-produced at low cost.

[Brief description of drawings]

1 to 7 relate to a first embodiment, and FIG. 1 is a configuration diagram showing an overall configuration of an endoscope apparatus.

FIG. 2 is a front perspective view of an insertion portion cover portion.

FIG. 3 is a front view of the front end side of the cover type endoscope.

FIG. 4 is a vertical cross-sectional view of the distal end side of the cover type endoscope.

FIG. 5 is a vertical cross-sectional view for explaining the flow of air and water.

FIG. 6 is a front view of the tip for explaining the flow of water supply.

FIG. 7 is a front view of the tip for explaining the flow of air supply.

8 and 9 relate to the second embodiment, and FIG. 8 is a perspective view of the distal end side of the insertion portion cover portion.

FIG. 9 is a vertical cross-sectional view of the distal end side of the cover type endoscope.

10 and 11 relate to a third embodiment, and FIG.
0 is a front view of the tip of the insertion portion cover portion.

FIG. 11 is a vertical cross-sectional view of the distal end side of the cover type endoscope.

12 to 14 relate to a fourth embodiment, and FIG. 12 is a front view of an insertion portion cover portion.

FIG. 13 is a vertical cross-sectional view of the distal end side of the cover-type endoscope at a position including an optical system.

FIG. 14 is a vertical cross-sectional view of the distal end side of the cover-type endoscope at a position including a nozzle.

FIG. 15 is a vertical cross-sectional view of the tip side of the cover type endoscope according to the fifth embodiment.

FIG. 16 is an external view of a package according to the sixth embodiment.

FIG. 17 is a cutaway view showing the structure of the package.

FIG. 18 is an explanatory view of a combination of a sterilization pack and a bag member.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Cover-type endoscope 3 ... Endoscope cover 4 ... Cover endoscope 5 ... Insert part cover part 11, 14, 15 ... Suction, air supply, water supply pipe line 8 ... Air supply nozzle 9 ... Water supply nozzle 35 ... Lens cover part 51 ... Tip part main body 52 ... Air supply nozzle upper surface part 54 ... Air supply nozzle lower surface part 53 ... Water supply nozzle upper surface part 56 ... Water supply nozzle lower surface part

Claims (1)

[Claims] 1. A fluid path for transferring a fluid, a tip forming member provided at a tip portion of an insertion portion, an optical window member having an optical window, and a fluid at the optical window provided at a tip portion of the fluid path. In the endoscope having at least one fluid nozzle for ejecting the fluid, the fluid nozzle is configured by a part of the tip forming member and at least one of the optical window member and the nozzle forming member. At the same time, at least one of the fluid nozzle and the optical window member is arranged so that the direction of ejecting the fluid toward the surface of the optical window is oblique to the surface of the optical window. An endoscope characterized by.