JPH07178039A - Cover type endoscope - Google Patents

Abstract

PURPOSE:To obtain a good observation view field in the inspection, by preventing the floating and the attachment of dust between a lens cover at the tip of an endoscope cover and a cover lens at the tip of the endoscope for covering, when the cover is installed and the endoscope inspection is carried out. CONSTITUTION:At the tip composition 29 of an endoscope 7 for covering, a cover lens 32 for observation and a cover lens 34 for lighting are provided. At the cover tip 16 of an endoscope cover 10, a lens cover 36 for observation and a lens cover 37 for lighting which are formed of a transparent resin respectively provided corresponding to the cover lenses 32 and 34 are provided airtight. At the inner surface of the transparent lens covers 36 and 37, a charging preventive agent 39 is coated as a dust preventive means, and an adhesive 40 is coated to adhere the dust around the lens cover 36 for observation and the lens cover 37 for lighting at the inner surface of the cover tip, at the positions where the tip composition 29 of the endoscope 7 is not contacted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cover-type endoscope having an endoscope cover for preventing the insertion portion of the endoscope from being contaminated by body fluid or the like.

[0002]

2. Description of the Related Art In recent years, endoscopes have been widely used in industrial fields, medical fields, and the like. When an endoscope used in the medical field is inserted into a body cavity, a water pipe formed for cleaning not only the outer surface of the insertion section inserted into the body cavity but also the cover lens provided at the tip of the insertion section. Tracts and air lines,
Alternatively, body fluid or blood adheres to the inner surface of a built-in conduit such as a treatment instrument channel for suctioning unwanted body fluid or inserting a treatment instrument. For this reason, when the endoscope once used for a patient is reused, it has been necessary to sufficiently perform cleaning and disinfection in order to reliably prevent infections and the like through the endoscope. However, cleaning and disinfecting the endoscope is a laborious and time-consuming task.

Therefore, in recent years, a disposable type cover provided with an air supply conduit, a water supply conduit, a suction conduit, a forceps channel and the like necessary for endoscopic observation, and a disposable type cover that is sufficiently sterilized, only optical elements are provided. There has been proposed a so-called cover-type endoscope which covers and uses the endoscope provided with. In the case of this cover-type endoscope, the cover endoscope covered with the cover is inserted into the body cavity, and after the examination is completed, the cover endoscope that has been in contact with the body cavity or body fluid is discarded to clean the cover endoscope itself. It can be used continuously without disinfection.

When the cover endoscope is covered with an endoscope cover, the cover lens of the cover endoscope is closely attached to the transparent lens cover of the endoscope cover, or 0.1 to 0. It is fixed at intervals of about 5 mm so that a good observation visual field without flare or ghost can be obtained.

[0005]

However, when the cover endoscope is used in the process of inserting it into the endoscope cover or in the inspection after the cover is attached, dust and dirt adhering to the inner surface of the endoscope cover, The dust and dirt floating inside the endoscope cover or the dust and dirt adhering to the outer surface of the endoscope insertion section for the cover may be removed from the lens cover of the endoscope cover and the cover endoscope. Due to floating or adhesion with the cover lens, the observed image is blurred, and the illumination light is reflected by dust to cause flare and ghost, which makes it impossible to obtain a good observation visual field.

Therefore, in order to prevent foreign matter such as dust or dirt from entering the endoscope cover, a cover member is attached to the opening on the near side, which is the opening of the endoscope cover, or the mouth of the expansion tube. It has been proposed that the cover member is put on and the cover member is removed when the cover endoscope is mounted. However, this method has a problem in that it is not possible to remove dust that has entered the endoscope cover and dust that has adhered to the outer surface of the endoscope insertion portion for the cover when the endoscope cover is manufactured.

The present invention has been made in view of the above circumstances, and dust or dust floating in the endoscope cover or adhering to the endoscope for a cover is attached when the cover is attached and an endoscopic inspection is performed. At the same time, a cover-type endoscope that prevents floating or adhesion between the lens cover at the tip of the endoscope cover and the cover lens at the tip of the cover endoscope to obtain a good observation visual field during inspection. Is intended to provide.

[0008]

SUMMARY OF THE INVENTION A cover-type endoscope according to the present invention covers a cover endoscope in which a cover lens is provided at a distal end of an elongated insertion portion and an insertion portion of the cover endoscope. A cover-type endoscope including at least an endoscope cover provided with a transparent lens cover so as to be opposed to the cover lens, the lens cover of the endoscope cover and the cover endoscope. At least one of the endoscope cover and the cover endoscope is provided with dust removing means for preventing dust and dirt from adhering to the cover lens or floating.

[0009]

According to the present invention, the dust removing means provided on at least one of the endoscope cover and the cover endoscope adheres to the inside of the endoscope cover or the outer surface of the cover endoscope. Alternatively, by removing floating dust, etc., it is possible to prevent dust from floating or adhering between the lens cover at the tip of the endoscope cover and the cover lens of the cover endoscope, and perform a good observation. You can get a view.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 3 relate to a first embodiment of the present invention, FIG. 1 is a perspective view showing a schematic configuration in which a cover-type endoscope is connected to peripheral devices in a cart, and FIG. 2 is a cover in an endoscope cover. FIG. 3 is a cross-sectional view showing the configuration when the endoscope for use is attached, and FIG. 3 is an enlarged cross-sectional view of the tip of the cover type endoscope with the cover endoscope attached to the tip of the cover.

As shown in FIG. 1, the cart 1 is provided with peripheral equipment connected to the cover type endoscope. The cart 1 contains a light source device 2, a video processor 3, a fluid control device 4, an endoscope cover extender 5, a monitor 6, and the like.

A universal cord 8 extending from the cover endoscope 7 is connected to the light source device 2. Further, the video processor 3 is connected with a signal cable 9 for transmitting a signal output from an image pickup device section, which will be described later, arranged near the distal end of the insertion section of the cover endoscope 7. The cover endoscope 7 includes an endoscope cover (hereinafter abbreviated as a cover) 10
The cover 10 is composed of an insertion portion cover portion 11, an operation portion cover 12, and a universal cord cover 13.

Further, the endoscope cover expander 5 is provided for facilitating the mounting of the insertion portion of the cover endoscope 7 on the insertion portion cover portion 11, and is an expansion for sending air into the insertion portion cover portion 11. The tube 14 is adapted to be connected. That is, when the cover endoscope 7 is inserted into the cover 10,
The insertion section cover section 11 is held by the cover holder 15, the insertion section cover section 11 is expanded by the endoscope cover expander 5, and in this state, the cover endoscope 7 is inserted into the endoscope insertion channel. It is designed to work.

As shown in FIG. 2, the observation optical system 30 of the cover endoscope 7 is provided at the cover tip portion 16 of the insertion portion cover portion 11.
A transparent lens cover 17 is provided so as to be opposed to. The lens cover 1 is provided near the lens cover 17.
An air supply / water supply nozzle 18 that opens toward 7 is provided.

An insert cover 20 formed of a soft material for isolating the insert 19 of the cover endoscope 7 from the external environment is hermetically connected to the cover tip 16. Further, on the operator's hand side of the insertion portion cover outer skin 20, an endoscope operation portion having a forceps insertion opening 21, an expansion tube mouth 22 to which the expansion tube 14 provided in the endoscope cover expansion device 5 is connected, and the like. Mouth part for fixing (hereinafter abbreviated as mouth part)
23 is provided and is hermetically connected to the outer cover 20 of the insertion portion.

An opening portion 25 of an endoscope insertion channel 24 is formed on the operator's hand side of the mouth portion 23, and an air feeding conduit 26 communicating with the air feeding / water feeding nozzle 18 of the cover tip portion 16 and Conduit tubes forming the water supply conduit 27, the suction conduit 28, etc., project.

The insertion portion 19 of the cover endoscope 7 is
The tip forming portion 29 is adapted to be inserted into the insertion portion cover portion so as to fit into the inner concave portion of the cover tip portion 16.

As shown in FIG. 3, an optical lens group 31a and an image pickup device section 31 are provided in the tip forming section 29 of the cover endoscope 7.
Observation optical system 31 consisting of b and light guide fiber bundle 3
An illumination optical system 33 including 3a and an optical lens 33b is provided. An observation cover lens 32 is provided at the tip of the observation optical system 31, and an illumination cover lens 34 is provided at the tip of the illumination optical system 33. The observation cover lens 32 and the illumination cover lens 34 are arranged with an elastic light-shielding member 35 formed of a material having a high charging property such as silicon rubber interposed therebetween.

At the cover tip portion 16 of the endoscope cover 10, the observation cover lens 32 and the illumination cover lens 3 are provided.
No. 4, each having a thickness of 0.3 mm to 0.6 m
An observing lens cover 36 and an illumination light lens cover 37, which are made of a transparent resin such as m methacrylic resin (PMMA) or polycarbonate resin (PC), are arranged in an airtight manner with a light shielding portion 38 interposed therebetween.

Then, the transparent lens covers 36, 3
While the inner surface of 7 is coated with a siloxane-based or surfactant-based antistatic agent 39 as a dust removing means, the inner surface of the cover is surrounded by the observation lens cover 36 and the illumination lens cover 37. An adhesive 40 or a charging agent 41 is coated on the portion of the cover endoscope 7 that does not come into contact with the distal end configuration portion 29 to adhere floating dust.

It should be noted that the observation lens cover 36, the observation cover lens 32, the illumination lens cover 37, and the illumination cover lens 34 are in a state in which the elastic light shielding member 35 and the light shielding portion 38 of the cover tip portion 16 are in close contact with each other. Is 0.
A slight gap of about 1 to 0.5 mm is formed. Further, instead of coating the charging agent 41, the cover tip portion 16 may be molded with a highly chargeable resin material such as Zeonex or silicone resin.

The operation of the cover-type endoscope configured as described above will be described. When the cover 10 is attached to the cover endoscope 7, first, the insertion portion cover portion 11 is held by the cover holder 15, the extension tube 14 is attached to the extension tube mouth 22, and the endoscope cover extender 5 is attached. More air or the like is sent to expand the inside of the endoscope insertion channel 24. Next, the insertion portion 19 of the cover endoscope 7 is pushed from the opening 25 toward the tip of the endoscope insertion channel 24. Then,
As shown in FIG. 3, the elastic light-shielding member 35 contacts the light-shielding portion 38, and the insertion portion cover portion 11 is fixed to the cover endoscope 7 by the connecting member (not shown) provided on the proximal side to complete the positioning. Next, after the operation section cover 12 and the universal cord cover 13 are attached, the operation section cover 12 and the universal cord cover 13 are inserted into the body cavity and an inspection is performed.

At this time, the dust 42 in the endoscope cover is
Since the antistatic agent 35 is coated on the inner surface of the observing lens cover 36 and the illuminating lens cover 37 disposed at the endoscope cover distal end portion 16, the adhesive 36 and the charging agent 37 do not adhere to each other. The tip end portion 29 of the cover endoscope 7 is attached to a portion around the observation lens cover 36 and the illumination lens cover 37 on the inner surface of the tip portion of the cover that is not coated.

After the inspection, the cover 10 is removed from the cover endoscope 7 and discarded in the reverse order of the procedure for mounting the endoscope cover. When the inspection is subsequently performed, the cover endoscope 7 is used.
The inspection may be performed by attaching another new cover 10 to the.

As described above, the inner surfaces of the observation lens cover and the illumination lens cover arranged at the cover tip of the endoscope cover are coated with the antistatic agent as dust removing means, while the inner surface of the cover tip is observed. Dust that floats inside the endoscope cover by coating with an adhesive or a charging agent that attaches dust to the area around the lens cover for illumination and the lens cover for illumination that does not come into contact with the tip configuration part of the cover endoscope. Without adhering to the observation lens cover and illumination lens cover, attach it to the adhesive or charging agent coated around the observation lens cover and illumination lens cover to ensure good observation without flare or ghosts caused by dust. You can get a view.

The antistatic agent may be coated on at least the inner surface of the observation lens cover. Also,
The adhesive or charging agent on the inner surface of the endoscope cover does not necessarily need to be coated. Further, the lens cover may be an integrally molded product having no light shielding portion between the observation lens cover and the illumination lens cover. Further, a better effect can be obtained by coating the outer surface of the observation cover lens and the cover lens for illumination of the cover endoscope with an antistatic agent or by using a member such as glass which is less likely to be charged than other members. be able to.

FIG. 4 is an explanatory view showing a schematic structure of a cover type endoscope according to a second embodiment of the present invention. As shown in the figure, in the present embodiment, the mouth portion 23 of the insertion portion cover portion 11 is
Is attached to the outer surface of the insertion portion 19 of the cover endoscope 7 to be inserted into the insertion portion cover portion 11 formed of an expandable material such as urethane foam, gauze, absorbent cotton, and charged fibers on the inner peripheral surface of the A filter 44 is provided as a dust removing means for removing the unwanted matter 43 such as dust and water. The inner diameter of the filter 44 is slightly smaller than the outer diameter of the insertion portion 19 of the cover endoscope 7, and when the insertion portion 19 of the cover endoscope 7 is inserted through the filter, the cover endoscope Insertion part 1
The unnecessary material 43 adhered to the outer surface of the endoscope insertion portion 19 for a cover in close contact with 9 is removed.

Reference numeral 45 is a filter fixing member for fixing the filter, and reference numeral 46 is an insertion portion cover outer cover 20.
It is a fixing ring formed of a heat shrinkable tube, a hard ring, or the like, which prevents the joint portion from expanding when joining the mouth portion 23 and the mouth portion 23. Other configurations and operations are the same as those in the above-described embodiment, and the same members are designated by the same reference numerals and the description thereof will be omitted.

As described above, by disposing the filter, which is a dust removing means formed of an expandable material such as urethane foam and charged fibers, on the inner peripheral surface of the mouth portion, the cover endoscope insertion portion In the process of inserting the unwanted matter adhering to the outer surface into the insertion portion cover portion, it can be wiped by the filter, and dust and water droplets can be prevented from entering the cover.

Further, by removing water droplets adhering to the insertion portion of the cover endoscope, it is possible to prevent the insertability of the cover endoscope insertion portion into the insertion portion cover portion from being changed by water droplets. In addition, it is possible to prevent the abnormal field of view caused by the water droplet interposed between the observation lens cover and the observation cover lens.

Further, as shown in FIG.
The same effect can be obtained by providing a soft seal member 47 such as silicon rubber instead of. That is, as shown in (a) of the figure, the seal member 47 is formed of a hole 48 having a smaller diameter than the outer diameter of the cover endoscope insertion portion 19 and four notches 49. Other configurations are the same as those of the above-described embodiment, the same members are designated by the same reference numerals, and description thereof will be omitted.

(A) and (c) of the figure show the soft seal member 47 before the cover endoscope 7 is inserted, and (b) and (d) of the figure show the cover endoscope when it is inserted. The soft seal member 47. As shown in the drawing, rubbers such as silicone rubber have an adsorptive property, and when the insertion portion 19 of the cover endoscope 7 passes through the small-diameter hole of the soft seal member 47, the cover endoscope insertion portion 19 is inserted. The unnecessary substance 43 can be removed by closely contacting with. Also, the seal member for inflating and expanding the inside of the cover also serves as the dust removing means, so that the structure of the mouth portion 23 can be simplified and the diameter thereof can be reduced.
An adhesive or the like may be applied to the outer surface of the soft seal member 47 in order to improve the adsorptivity of the soft seal member 47.
Other functions and effects are similar to those of the above-mentioned embodiment.

FIG. 6 is an explanatory view showing a schematic structure of a cover type endoscope according to a third embodiment of the present invention. As shown in the figure, the cover-type endoscope of this embodiment is a side-viewing endoscope, and unlike the first embodiment, an observation lens cover 36 and an illumination lens cover 37 are arranged on the side surface of the cover tip. I have set up. Then, a suction hole 51 is opened on the near side of the observation lens cover 36, and this suction hole 51 communicates with a suction tube mouth 52 of the mouth body portion 23 on the near side of the cover.

A suction tube 54 is connected to the suction tube mouth 52 as dust removing means. The suction tube 54 is connected to the intake side of the air supply pump 53 via an intake air filter 54a, and an air supply tube 55 provided with an air supply air filter 55a from the air supply side of the air supply pump 53. Are connected to the expansion tube mouth 22. The air filters 54a and 55a for removing dust and the like in the air are arranged near the intake side tube 54 and the air supply side tube 55 of the air supply pump 53 in the endoscope cover dilator and are replaceable. It is installed in. Other configurations are the same as those of the above-described embodiment, the same members are designated by the same reference numerals, and description thereof will be omitted.

By constructing the cover-type endoscope as described above, when the insertion portion 19 of the cover endoscope 7 is inserted into the insertion portion cover portion, the insertion portion cover 11 is inserted through the air filter 55a. The clean air sent in expands the outer cover 20 of the insertion portion cover, and the insertion is performed while expanding the clearance with the insertion portion 19 for the cover endoscope. Furthermore, floating matter 5 floating in the endoscope cover
6 is sucked through the suction hole 51 and is removed by the air filter 54a provided in the intake side tube 54.

Reference numeral 57 is a tip fixing member made of elastic rubber, which is installed on the opposing surface of the observing lens cover 36 and the illuminating lens cover 37, and the tip forming portion 29 of the cover endoscope 7 is located inside. The force is applied so that the endoscope cover 10 is securely fixed to the cover tip portion 16 of the endoscope cover 10.

As described above, while inflating, the clean air is sent into the endoscope cover through the air filter, while the air in the endoscope cover in which the suspended matter is mixed is sucked and the air is passed through the air filter. Due to the structure that cleans and recirculates, the space between the cover lens of the cover endoscope and the lens cover of the endoscope cover is completed when the cover endoscope is completely attached to the endoscope cover. It is possible to completely remove the suspended matter floating in the. Further, by circulating the air in the endoscope cover, a damper due to an air pool cannot be formed at the tip of the cover outer cover, so that the insertability is greatly improved.

The air filter may be provided on either the intake side or the air supply side. In addition to the general mesh filter, the air filter may be a charged air filter in which dust is adsorbed by the charged fibers. Furthermore, an example is shown in which the expansion tube mouth for inflating, the suction hole, and the suction tube mouth are all provided on the insertion section cover section. However, by providing these on the cover endoscope side, the insertion section cover section is provided. It is possible to provide a low-cost endoscope cover by simplifying the configuration of. Other functions and effects are similar to those of the above-mentioned embodiment.

The present invention is not limited to the above-mentioned embodiment, and a highly chargeable plastic is used for the tip forming portion of the endoscope for the cover, the curved rubber, or the flexible tube portion, or the charging is performed. You may make it coat an agent and an adhesive. Further, the insertion portion is applicable to a cover-type laparoscope having a rigid type and a cover-type industrial endoscope other than the medical type, and the same effect can be obtained. Furthermore, the configurations and combinations of the first to third embodiments can be changed, and the endoscopic image transmission means of the observation optical system may be a so-called fiberscope using an image guide fiber bundle.

By the way, a circular through hole is formed in the distal end forming portion 29 of the cover endoscope 7 in order to dispose the observation optical system 31 and the illumination optical system 33. However,
The through-hole for disposing the observation optical system 33 does not necessarily have to be circular because the monitor screen is substantially quadrangular.
On the contrary, there is a disadvantage in that the bonding / joining area of the observation lens cover 36 provided on the endoscope cover is reduced by forming the through hole for arrangement in a circular shape. Therefore, the above-mentioned inconvenience can be solved by configuring as follows.

As shown in FIG. 8, the endoscopic image 65 displayed on the monitor 6 has a substantially quadrangular shape with R planes at the four corners due to the restrictions of the image pickup device section 31b. Therefore, as shown in FIG. 7, the through hole 61 (broken line portion) is formed into a substantially quadrangle in accordance with the shape of the display screen of the observation optical system 31, and the illumination lens opposite to the illumination optical system 33 (broken line). The cover 37 is arranged so as to be eccentric with respect to the illumination optical system 33. Here, when the observation lens cover 36 and the illumination lens cover 37 arranged at the cover tip portion 16 are viewed from the front, the hatched portions 63 and 64 show the observation lens cover 3.
6 and the illuminating lens cover 37 serve as a fixing surface for fixing the cover tip portion 16.

By making the through holes for arrangement non-circular according to the shape of the display screen displayed on the monitor, the circular shape (6
2) A fixed surface having a wider area can be secured. Therefore, by making the fixing surface a portion between the two-dot chain line and the substantially quadrangle, it is possible to reduce the diameter of the cover front end portion. Further, by eccentricizing the illumination cover lens to the outside, the fixing area can be sufficiently increased, and the periphery can be efficiently and widely illuminated.

By the way, on the outer circumference of the bending piece and the bending rubber forming the bending portion of the endoscope, there is a blade for preventing water leakage when the bending piece bites into the bending rubber and opens a hole. It was covered all around. However, since the connecting portion of the first and last pieces of the bending piece is configured to be fixed to the tip forming portion and the front mouthpiece of the flexible tube from the hand, both the inner and outer diameters are large, and the blade is soldered to this large diameter portion. Since it was attached, this connection portion had the largest diameter in the endoscope. In the case of the cover endoscope, the inner diameter of the endoscope cover is determined by the outer diameter of this portion. Therefore, as described below, the first bending piece of the endoscope bending portion is
By forming the piece and the final piece, it is possible to form a connection portion having a small diameter.

As shown in FIG. 9, the bending portion 7 of the endoscope insertion portion
The reference numeral 1 designates a distal end forming portion 72 and a proximal flexible tube portion 73.
A bending rubber 74 is watertightly fixed to the inside, and a plurality of bending pieces 75 are connected to the inside of the bending rubber 74. The first piece 75a and the last piece 75z of the bending piece 75 have a connecting portion connected to the tip forming portion 72 and the flexible tube portion 73,
On the other side of this connecting portion, a small diameter portion 76 having a one-step outer diameter is formed. Between the first bending piece 75a and the final bending piece 75z, a bending piece 7 having the same diameter as the small diameter portion 76 is provided.
5,75,75. ． ． Are connected, and the bending pieces 75, 7
5,75. ． ． A cylindrical blade 77, which is a mesh tube of thin stainless wire, is covered with the both ends, and both ends thereof are connected and fixed by a fixing member 78 such as solder or an adhesive.

The first bending piece 75a of the bending piece 75
In order to bend the bending portion 71 vertically and horizontally,
Four left and right traction bending wires (hereinafter referred to as wires) 79 are fixed. The wire 79 is inserted into four bending coils 80 that guide the wires 79 arranged on the distal end side of the flexible tube portion 73, and is connected to a bending operation portion (not shown). In addition, each bending piece 75, 7
5,75 ,. ． ． Are rotatably connected by rivets 81.

As described above, by forming the first bending piece and the final bending piece of the bending piece with the connecting portion and the small diameter portion, it is possible to prevent the connecting portion from having a large diameter due to the blade or the fixing member. In addition, it is not necessary to make the outer diameter of the insertion portion cover portion unnecessarily large, and it is possible to reduce the pain of the subject.

Further, the amount of bending between the first bending piece and the second bending piece and between the final bending piece and the bending piece in front of the final bending piece is smaller than the bending amounts of the bending pieces of other parts. Therefore, since the bending rubber is not bitten by the bending piece to form a hole, it is not necessary to provide a blade. In order to further increase the certainty, the bending amount between the first bending piece and the second bending piece and between the final bending piece and the bending piece before the final bending piece is further reduced, You may make it hard to bend by stopping the backlash work to improve movement.

Further, as shown in FIG. 10, the blade of the endoscope bending portion 71 for a cover may be fixed as follows. As shown in the figure, the small diameter portion 76 that does not cover the tip forming portion 72 of the first bending piece 75a and the bending pieces 75, 75, 75 ,. ． ． The blades are covered with and the ends are connected and fixed by a fixing member 78 such as soldering or an adhesive. At this time, the connected and fixed outer circumference is covered with a curved rubber 74 and is adhesively fixed to the tip forming portion 72, and a thin ring-shaped fixing member 82 formed of a metal such as stainless steel or a resin material such as Ultem is covered thereon. . The proximal end 82a of the ring-shaped fixing member 82 on the curved rubber 74 is smoothly chamfered by 30 ° or rounded to prevent damage to other members.

As described above, the curved rubber and the tip end forming portion 72 are fixed by bonding instead of the conventional bobbin bonding and by fixing with a thin ring-shaped fixing member, the variation of the outer diameter can be prevented and the inner diameter can be prevented. Improves slipperiness with the inner surface of the endoscope cover, and significantly improves durability.

If necessary, the outer surface of the ring-shaped fixing member may be roughened to improve the slipperiness of the surface.
Further, by dropping and processing only a part of the portion of the first bending piece that comes into contact with the endoscope cover, it is less likely that interference with built-in objects in the first bending piece occurs.

[0051]

As described above, according to the present invention, dust or dust floating in the endoscope cover or adhering to the endoscope for the cover can be removed when the cover is attached and when the endoscope is inspected. , A cover-type endoscope that prevents floating or adhesion between the lens cover at the tip of the endoscope cover and the cover lens at the tip of the cover endoscope, and provides a good observation field of view during inspection. Can be provided.

[Brief description of drawings]

1 to 3 relate to a first embodiment of the present invention,
FIG. 1 is a perspective view showing a schematic configuration in which a cover-type endoscope is connected to peripheral devices in a cart.

FIG. 2 is a cross-sectional view showing the configuration when the cover endoscope is mounted inside the endoscope cover.

FIG. 3 is an enlarged cross-sectional view of the tip of the cover-type endoscope with the cover endoscope attached to the cover tip.

FIG. 4 is an explanatory diagram showing a schematic configuration of a cover-type endoscope according to a second embodiment of the present invention.

FIG. 5 is a diagram showing a schematic configuration of a dust removing means according to a modification of the second embodiment.

FIG. 6 is an explanatory diagram showing a schematic configuration of a cover-type endoscope according to a third embodiment of the present invention.

FIG. 7 is a diagram illustrating a fixing surface of a lens cover.

FIG. 8 is a diagram showing an endoscopic image projected on a monitor screen.

FIG. 9 is a half cross-sectional view showing a configuration of a bending portion of an endoscope.

FIG. 10 is a half cross-sectional view showing another configuration of the bending portion of the endoscope.

[Explanation of symbols]

 Reference numeral 7 ... Cover endoscope 10 ... End endoscope cover 32 ... Observation cover lens 34 ... Illumination cover lens 36 ... Observation lens cover 37 ... Illumination lens cover 39 ... Antistatic agent (dust removing means)

Claims (1)

[Claims] 1. An endoscope for a cover having a cover lens arranged at a distal end of an elongated insertion portion, and a transparent lens for covering the insertion portion of the endoscope for a cover and facing at least the cover lens. In a cover-type endoscope including an endoscope cover having a cover, dust or dirt adheres or floats between the lens cover of the endoscope cover and the cover lens of the cover endoscope. A cover-type endoscope, wherein a dust removing means for preventing the above is provided on at least one of the endoscope cover and the cover endoscope.