JPH09173281A - Endoscope - Google Patents

Abstract

PROBLEM TO BE SOLVED: To well perform the sending of water and suction by increasing the outer diameter of the insertion part of an endoscope having a washing sheath provided thereto. SOLUTION: The inner diameter of a sheath insertion part is made larger than the outer diameter of a tip hard part 4 and an opening part 31 is provided in a sheath tip part 16. Further, an object lens 32 is provided in the tip of the tip hard part 4 of an endoscope and a nozzle 33 is provided to the sheath tip part 16. In such a state that the object lens washing sheath is attached to the insertion part, a clearance 34 is provided between the insertion part and the sheath insertion part. The cap communicating with the clearance 34 is provided in the sheath main body and a tube is connected to the cap and the sending and suction of washing water are performed through the tube to wash the object lens 32.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an endoscope, and more specifically to a tubular cleaning sheath for cleaning an objective lens, which covers an insertion portion and a distal rigid portion and cleans an objective lens provided in the distal rigid portion. The present invention relates to a wearable endoscope.

[0002]

2. Description of the Related Art In recent years, endoscopes have come to be widely used for surgical operations and the like. Under the operating environment in the field of surgery, there is a problem that the objective lens of the endoscope is contaminated due to intraoperative bleeding and the field of view is obstructed.

As a conventional technique for solving this, for example, an objective lens cleaning sheath as described in Japanese Utility Model Publication No. 5-11841 and Japanese Patent Application No. 6-326019 previously filed by the present applicant is introspected. There is a method of cleaning the objective lens of an endoscope by mounting it on a mirror. In addition, in one kind of the endoscope,
It is known that there is a bending electronic endoscope that has a bending portion in a part of the insertion portion, and a tip rigid portion provided on the distal end side of the bending portion has an objective lens system and a solid-state imaging device (CCD) built-in. ing.

In this prior art, when the objective lens cleaning sheath is mounted on the endoscope, a clearance is provided between the outer periphery of the insertion portion of the endoscope and the inner periphery of the objective lens cleaning sheath.

Then, the cleaning water is guided through the clearance to the objective lens to clean the objective lens.
At this time, both the outer diameter of the endoscope insertion portion and the inner diameter of the objective lens cleaning sheath are constant over the entire length of the insertion portion.
Therefore, the clearance is also constant over the entire length of the insertion part. The clearance is set to a minimum in order to reduce the outer diameter of the endoscope insertion portion when the objective lens cleaning sheath is attached to the endoscope.

[0006]

However, if the clearance is narrow and constant over the entire length of the endoscope insertion portion, the pipe frictional resistance becomes large, and the response of the washing water to the water supply / suction operation is delayed, or the water supply / suction is performed. Problems with water supply and suction such as defects will occur.

[0007] On the other hand, in an endoscope used especially for a surgical operation or the like, it is desired that the outer diameter of the endoscope insertion portion be made smaller in order to minimize the burden on the patient and the skin incision mark. Therefore, if the clearance is easily increased to solve the above-mentioned problem, the outer diameter of the endoscope insertion portion equipped with the objective lens cleaning sheath is increased, which is against the needs of the endoscope user. .

Further, in order to obtain a desired high-quality image, the objective lens system installed at the tip of the endoscope insertion portion and the solid-state image pickup device arranged at the image forming position have a certain outer diameter or more. However, there is a limit to making the outer diameter of the endoscope insertion portion thin because the material is required.

The present invention has been made in view of the above circumstances, and an endoscope having a good water supply and suction function without increasing the outer diameter of the insertion portion of the endoscope equipped with the objective lens cleaning sheath is provided. It is intended to provide a mirror.

[0010]

An endoscope of the present invention has an elongated insertion portion and a distal end hard portion connected to a distal end portion of the insertion portion, and the insertion portion and the distal end hard portion are provided. In an endoscope in which a cleaning sheath for cleaning a cylindrical objective lens for covering the objective lens provided on the rigid tip portion can be attached, the outer diameter of the insertion portion is at least the maximum outer diameter of the rigid tip portion. It is made thinner than the diameter.

In the endoscope of the present invention, the outer diameter of the insertion portion is made smaller than at least the maximum outer diameter of the distal end hard portion, so that the outer diameter of the insertion portion of the endoscope equipped with the cleaning sheath can be reduced. It is possible to satisfactorily perform water supply and suction without increasing the thickness.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

First, a first embodiment of the present invention will be described. 1 to 4 relate to a first embodiment of the present invention, FIG. 1 is a configuration diagram showing a configuration of an endoscope and an objective lens cleaning sheath, and FIG. 2 is a diagram showing the objective lens cleaning sheath of FIG. Sectional drawing which shows the longitudinal cross section of the front-end | tip part of an endoscope,
3 is a configuration diagram showing a configuration of a modified example of the endoscope and the objective lens cleaning sheath of FIG. 1, and FIG. 4 is a cross-sectional view showing a longitudinal cross section of the distal end portion of the endoscope having the objective lens cleaning sheath of FIG. It is a figure.

(Structure) As shown in FIG. 1, an endoscope 1 of the present embodiment is a curable rigid electronic endoscope, and an operating portion 2 is provided.
The elongated insertion portion 3 is connected to the distal end side, and the insertion portion 3 is composed of a distal end hard portion 4, a curved portion 5, and a rigid insertion portion 6 having a diameter smaller than that of the distal end rigid portion 4. The outer diameter of the curved portion 5 is preferably smaller than that of the hard tip portion 4.

Although not shown in the figure, the tip end hard portion 4 is not shown.
A solid-state image sensor is built in the objective lens system and its image forming position. The rigid insertion portion 6 can be made thinner than the distal rigid portion 4 because the components inside the rigid insertion portion 6 are mainly a signal cable for transmitting a video signal, a light guide fiber for transmitting illumination light, and a curved portion. This is because it is a wire wire for operating the, and even if the outer diameters of them are summed, they are thinner than the outer diameters of the objective lens system and the solid-state imaging device.

The objective lens cleaning sheath 11 mounted and used on the endoscope 1 is composed of a sheath insertion portion 12 mounted on the insertion portion 3 and a sheath body 13 mounted on the operation portion 2.

The sheath insertion portion 12 has a sheath rigid portion 14 connected to the sheath body 13, a sheath flexible portion 15 provided on the distal end side of the sheath rigid portion 14 for covering the bending portion 5 of the endoscope, and the sheath flexible portion 15. The sheath distal end portion 16 is provided on the distal end side of the sheath flexible portion 15 and is attached to the distal end rigid portion 4 of the endoscope 1. A resin tube made of polyurethane, vinyl chloride or the like is used for the sheath flexible portion 15.

A substantially L-shaped cam groove 18 is provided at the rear end of the side surface of the sheath body 13 so as to engage with a pin 7 provided on the side surface of the operating portion 2 of the endoscope 1. It has become. That is, the pin 7 advances in the axial direction of the objective lens cleaning sheath 11 along the cam groove 18 and then reaches the locking position by rotating in the circumferential direction. As a result, the objective lens cleaning sheath 11 is moved to the endoscope 1 Positioned and fixed with respect to.

As shown in FIG. 2, the inner diameter of the sheath insertion portion 12 is larger than the outer diameter of the distal end hard portion 4. The sheath distal end portion 16 is provided with an opening portion 31. Further, an objective lens 32 is provided at the tip of the rigid tip portion 4 of the endoscope, and a nozzle 33 is provided at the sheath tip portion 16. When the objective lens cleaning sheath 11 is attached to the insertion portion 3, the insertion portion 3 and the sheath insertion portion 12
A clearance 34 is provided between and.

Returning to FIG. 1, the sheath body 13 is provided with a mouthpiece 17 communicating with the clearance 34. A tube (not shown) is connected to the mouthpiece 17, and the washing water is fed and sucked through the tube. With objective lens 3
It is supposed to wash 2.

(Operation) In the present embodiment having such a configuration, the washing water sent from the mouthpiece 17 passes through the clearance 34 to the objective lens 32 from the nozzle 33 provided in the sheath distal end portion 16. Is ejected to wash away the dirt on the objective lens 32. In addition, the objective lens 32
The washing water remaining on the top is sucked from the nozzle 33, and is discharged from the mouthpiece 17 in a route opposite to the case of water feeding.

At this time, since the outer diameter of the rigid insertion portion 6 is smaller than that of the distal end rigid portion 4, the clearance 34 between the insertion portion 3 and the sheath insertion portion 12 is larger than that of the distal end rigid portion 4 by the rigid insertion portion 6.
Is wider. Further, the ratio of the rigid insertion portion 6 to the entire length of the insertion portion 3 is larger than that of the distal end rigid portion 4. Therefore, the pipe frictional resistance is reduced as compared with the conventional one, the response to the water supply / suction operation is quick, and the malfunctions of the water supply, suction and air supply functions are less likely to occur.

(Effect) As described above, in the present embodiment,
By making the rigid insertion portion 6 of the insertion portion 3 thinner than the distal end rigid portion 4, even when the outer diameter of the insertion portion of the endoscope 1 equipped with the objective lens cleaning sheath 11 is the same as the conventional one, each of water supply, suction and air supply is performed. The responsiveness to the operation can be ensured and improved.

In the present embodiment, the endoscope 1 is a curable rigid electronic endoscope having the insertion portion 2 and the bending portion 5 and the rigid insertion portion 6. However, as shown in FIG. It may be a rigid electronic endoscope without the portion 5.

That is, as a modification of the first embodiment, as shown in FIG. 3, the insertion portion 3 connected to the operation portion 2 of the endoscope 1 includes a distal end rigid portion 4 and a distal end rigid portion 4 from the distal end side. The rigid insertion portion 6 has a smaller diameter than the rigid portion 5. The objective lens system (not shown) and the solid-state image sensor at the image forming position thereof are built in the distal end rigid portion 5 as in the first embodiment.

The objective lens cleaning sheath 11 is also the same as in the first embodiment (FIG. 1) (FIG. 1), and the sheath insertion portion 12 attached to the insertion portion 3 and the sheath body 13 attached to the operation portion 2. Composed of and.

Further, as shown in FIG. 4, as in the first embodiment, the sheath insertion portion 12 is provided with a nozzle 33, and the inner diameter of the sheath insertion portion 12 is outside the distal end hard portion 4. It is larger than the diameter. Further, the sheath insertion portion 12 is provided with an opening 31 having a diameter that does not block the field of view of the endoscope 1 and the illumination light emitted from the distal end of the insertion portion 3.

It goes without saying that the modified example of the first embodiment having such a configuration also has the same operation and effect as those of the first embodiment.

Next, a second embodiment of the present invention will be described. 5 and 6 relate to the second embodiment of the present invention. FIG. 5 is a cross-sectional view showing a longitudinal cross-section of the distal end portion of an endoscope equipped with an objective lens cleaning sheath, and FIG. −
It is sectional drawing which shows the A line cross section.

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

(Structure) As shown in FIG. 5, the endoscope 1 is a curable rigid electronic endoscope as in the first embodiment.
A groove 41 is provided in the longitudinal direction in the distal end hard portion 4 of the insertion portion 3. The groove 41 is a notch formed by a flat surface, and is symmetrically formed so that the shape of the insertion portion 3 when viewed from the front surface direction of the insertion portion 3 is a substantially regular hexagon.

As shown in FIG. 6 which is a cross section taken along the line AA of FIG. 5, the inner diameter of the sheath distal end portion 11 is formed to be the same as the maximum outer diameter of the distal end rigid portion 4, and further the sheath distal end portion 16 is formed. A flow path 42 is formed by the inner diameter of the groove and the groove 41.

Returning to FIG. 5, an inclined portion 43 is provided at the distal end of the sheath distal end portion 16, and when the objective lens cleaning sheath 11 of the endoscope 1 is mounted, the distal end of the distal end hard portion 4 is inclined. It is in contact with the portion 43. And the tip hard part 4
A water supply port 44 is formed between the groove 41 and the inclined portion 43 at the contact portion between the inclined portion 43 and the inclined portion 43. Further, the sheath tip portion 16
The opening 31 has a diameter that does not block the field of view of the endoscope 1 and the illumination light emitted from the tip of the insertion section 3.

The groove 41 is not limited to a flat surface and may be concave. Although the number of the grooves 41 is six in FIG. 6, the number is not limited to this and may be at least one.

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

(Operation) The flow path 42 has the clearance 34.
Similarly to the first embodiment, the cleaning water sent from the base 17 passes through the flow path 42 to the objective lens 32 from the water supply port 44 formed in the sheath distal end portion 16 as in the first embodiment. It is jetted toward the surface to wash away dirt on the objective lens 32. Further, the cleaning water remaining on the objective lens 32 is sucked from the water supply port 44, and the base 1
It is discharged from 7.

(Effect) As described above, in this embodiment,
Similar to the first embodiment, the pipe frictional resistance is reduced as compared with the conventional example, the response to water supply and suction operation is quick, and
This has the effect that defects in the suction and air supply functions are unlikely to occur.

In addition to the effects of the first embodiment,
Since the inner diameter of the sheath distal end portion 16 is provided to be the same as the outer diameter of the distal end rigid portion 4 of the endoscope 1, the outer diameter portion of the endoscope insertion portion in which the objective lens cleaning sheath 11 is mounted can be made thinner. .

Further, since the water supply port 44 is formed between the groove 41 and the inclined portion 43, it is not necessary to provide the nozzle 33 provided in the first embodiment and its modification. Therefore, the cleanability of the distal end of the sheath insertion portion 12 can be improved and the manufacturing cost can be reduced. Further, since the grooves 41 are provided at six symmetrical positions, the objective lens 3
Water can be delivered evenly with respect to 2.

Further, in the present embodiment, since the outer diameter of the distal end hard portion 4 and the inner diameter of the sheath insertion portion 12 are provided to be the same, there is little backlash, and the opening 31 is visible when the objective lens cleaning sheath 11 is attached. It does not block the field of view of the mirror 1 or the illumination light.

In this embodiment, the endoscope 1 is first
As described in the embodiment, the bending-type rigid electronic endoscope having a bending portion has been described. However, as in the modification of the first embodiment, the endoscope includes the rigid insertion portion 6 in which the bending portion 5 is omitted. The same applies to a rigid electronic endoscope composed of the distal end rigid portion 4 and the sheath insertion portion 12 in this case does not include the sheath flexible portion 15.

[Supplementary Note 1] (Supplementary Note 1-1) An elongated insertion portion and a distal end hard portion connected to a distal end portion of the insertion portion are provided to cover the insertion portion and the distal end hard portion. In an endoscope in which a cleaning sheath for cleaning a cylindrical objective lens for cleaning an objective lens provided in a distal end rigid portion can be attached, an outer diameter of the insertion portion is at least smaller than a maximum outer diameter of the distal end rigid portion. An endoscope characterized by being formed.

(Additional Statement 1-2) The rigid tip portion includes the objective lens and a solid-state imaging device arranged at an image forming position of the objective lens.
The endoscope according to 1.

(Additional Item 1-3) The additional portion is characterized in that the insertion portion has a hard portion at least in part.
The endoscope according to 1.

(Additional Item 1-4) The endoscope according to Additional Item 1-1, wherein the insertion portion has a rigid portion and a curved portion.

(Additional Item 1-5) The endoscope according to Additional Item 1-2, wherein at least one notch is provided in the longitudinal direction on the outer peripheral surface of the distal end hard portion.

(Additional Item 1-6) The endoscope according to Additional Item 1-5, wherein the outer diameter of the distal end hard portion and the inner diameter of the cleaning sheath are formed to have the same size.

(Additional Item 1-7) The endoscope according to additional item 1-5, wherein the cutout portion is formed of a flat surface.

(Additional Item 1-8) The endoscope according to Additional Item 1-5, characterized in that the notch portion is provided at a plurality of positions symmetrically on the outer peripheral surface of the distal end rigid portion.

By the way, conventionally, an endoscope is wrapped in an endoscopic wrapping material for storage and the like, but the conventional endoscopic wrapping material is disclosed in, for example, Japanese Patent Laid-Open No. 3-140135. As is apparent from the above, an escape portion that is sufficiently wider than the outer diameter of the endoscope was formed between the distal end portion of the endoscope and the packaging material.

However, in such a conventional technique, since the relief portion is formed to be sufficiently wider than the outer diameter of the endoscope, when the endoscope is taken out, a portion vulnerable to external force is erroneously grasped and taken out. However, there is a drawback in that gripping force may be applied to a portion that is weak against external force and it may be damaged.

Therefore, at the time of taking out the endoscope, it is necessary to prevent a force from being applied to a portion vulnerable to an external force, to avoid grasping and taking out a portion vulnerable to an external force, and to prevent the portion of the endoscope vulnerable to an external force from being damaged. The endoscopic wrapping material that can be used will be described.

7 to 14 relate to an embodiment of the packaging material for an endoscope capable of preventing damage to a portion of the endoscope which is weak against external force when the endoscope is taken out, and FIG. 7 is an endoscope. And a configuration diagram showing the configuration of the endoscope packaging material, FIG. 8 is an enlarged configuration diagram showing the configuration of the endoscope packaging material of the portion accommodating the curved portion of FIG. 7, and FIG. 9 is the camera connector portion of FIG. 8 is an enlarged configuration diagram showing the configuration of the packaging material for an endoscope in the portion for storing
FIG. 11 is an enlarged configuration diagram showing the configuration of a first modified example of the endoscope packaging material of the portion that accommodates the curved portion of FIG. 11, and FIG. 11 is the second endoscope packaging material of the portion that accommodates the curved portion of FIG. FIG. 12 is an enlarged configuration diagram showing the configuration of a modified example of FIG. 12, FIG. 12 is an enlarged configuration diagram showing the configuration of a third modified example of the endoscope packaging material of the portion accommodating the bending portion of FIG. 8, and FIG. FIG. 14 is an enlarged configuration diagram showing the configuration of a fourth modified example of the endoscope packaging material that accommodates the curved portion, and FIG. 14 is a modified example of the endoscope packaging material that accommodates the camera connector portion of FIG. 9. 3 is an enlarged configuration diagram showing the configuration of FIG.

(Structure) As shown in FIG.
An insertion portion 3 including a distal end rigid portion 4, a curved portion 5, and a rigid insertion portion 6 is provided, and an operation portion 2 is provided at the proximal end of the insertion portion 3. A universal cord portion 51 extends at the rear end of the operation portion 2, and a light source connector portion 52 is provided at the other end of the universal cord portion 51. Also, the light source connector section 5
A camera cable 53, which is an electric system cable built in the universal cord section 51, branches from 2, and a camera connector section 54 is provided at the end of the camera cable 53.

The endoscopic wrapping material 61 for accommodating such an endoscope 1 is provided with an accommodating groove 62 corresponding to the shape of the endoscope 1 to be accommodated.

As shown in FIG. 8, in the endoscope packaging material 61, a portion that is vulnerable to an external force of the endoscope 1, for example, a storage groove 62 in which the bending portion 5 is to be stored, has a size such that a finger cannot enter. The escape portion 63 is provided. The width of the escape portion 63 is 2 mm
10mm is good. Since the curved portion 5 has a structure in which ring-shaped members are connected and covered with rubber, it is weak against external force.

Further, as shown in FIG. 9, even in the storage groove 62 matching the shape of the camera connector 54 to be stored, the portion where the external force of the endoscope is weak, for example, the camera cable end portion 53a is stored. The groove 62 is provided with an escape portion 63 having a size that does not allow a finger to enter. The width of the escape portion 63 is preferably 2 mm to 10 mm. The camera cable end 5
3a is easily subjected to an external force such as pulling or bending, and there is a risk of disconnection due to repeated application of external force.

(Operation) In the endoscope packaging material 61 thus configured, the interference between the portion of the endoscope 1 which is weak against the external force and the endoscope packaging material 61 is eliminated, and the escape portion 63 is provided. Prevent your fingers from getting in.

(Effect) Therefore, when taking out the endoscope 1,
It is possible to provide a packaging material for an endoscope that can prevent the endoscope 1 from being damaged without being damaged because it is possible to prevent the force from being applied to the portion weak to the external force and to grasp and remove the portion weak to the external force.

As a first modification of the endoscopic wrapping material, as shown in FIG. 10, in the endoscopic wrapping material 61, in particular, the relief portion 63 is filled with a flexible wrapping material 65. You may. With this configuration, it is difficult to visually confirm the escape portion 63, and it is possible to more reliably prevent a finger or the like from accidentally entering the escape portion 63.

As a second modified example of the endoscope wrapping material, as shown in FIG. 11, in the endoscope wrapping material 61, in particular, a cover 66 is provided on the upper surface of the escape portion 63. May be. By doing so, it is possible to prevent the escape portion 63 from being visually confirmed, and a finger or the like may be mistaken for the escape portion 63.
You can definitely prevent entering.

Further, as a third modified example of the endoscope wrapping material, as shown in FIG. 12, in the endoscope wrapping material 61, in particular, the escape portion 63 is provided in the bending portion 5 of the endoscope 1. It may be configured to extend over the hard tip portion 4. With this configuration, the interference between the portion of the endoscope 1 which is weak against external force and the distal end rigid portion 4 and the endoscope packaging material 61 is eliminated, and
Prevents fingers from entering the escape portion 63. As a result, in addition to the effect of the above-described embodiment of the packaging material for an endoscope, it is possible to avoid the bending portion 5 from being bent because the distal end hard portion 4 is difficult to come out particularly when the endoscope is taken out. It is possible to prevent 5 from being damaged.

As a fourth modified example of the endoscopic wrapping material, as shown in FIG. 13, a portion of the endoscopic wrapping material 61 that is further resistant to the external force of the endoscope, for example, a rigid insert. A grip portion 71 having a size such that a finger can be inserted into the storage groove 62 in which the portion 6 is to be stored may be provided. Further, as shown in FIG. 14, a grip portion 71 of a size that allows a finger to be inserted may be provided in the storage groove 62 in which the camera connector 54 is to be stored. At this time, the clearance between the rigid insertion portion 6 and the camera connector 54 and the grip portion 71 is preferably 10 mm or more.

By providing the grip portion 71 in this manner, the portion of the endoscope 1 which is strong against external force can be grasped and taken out. That is, in addition to the action and effect of the above-described embodiment of the packaging material for an endoscope, the endoscope 1 can be taken out more safely by making it possible to grasp the portion strong against external force.

[Additional remark 2] (Additional remark 2-1) An endoscope accommodation groove for accommodating an endoscope is provided, and a portion of the endoscope accommodation groove that is vulnerable to an external force of the endoscope is accommodated. A packaging material for an endoscope, characterized in that a first space portion, which is a narrow space in which a portion weak against the external force is movable, is provided in the endoscope storage groove.

(Additional Item 2-2) The packaging material for an endoscope according to Additional Item 2-1 characterized in that the first space portion is filled with a flexible packaging material.

(Additional Item 2-3) The cover material for an endoscope according to Additional Item 2-1 is characterized in that a cover is provided on the upper surface of the first space portion.

(Additional Item 2-4) The endoscope according to Additional Item 2-1 in which the first space portion is extended to the storage groove in which the distal end portion of the endoscope is to be stored. Packaging material.

(Additional Item 2-5) The endoscope housing having an endoscope housing groove for housing an endoscope, and housing a portion of the endoscope housing groove that is weak against external force of the endoscope. The endoscope storage groove for storing a portion of the endoscope storage groove that is strong against the external force of the endoscope, by providing the groove with a first space portion that is a narrow space in which the portion weak against the external force can move. The packaging material for endoscopes, further comprising a second space portion which is wider than the first space portion.

(Appendix 2-6) The appendixes 2-1, 2-2 and 2 are characterized in that the portion vulnerable to the external force is the bending portion of the endoscope or the joint portion between the connector and the cable.
The packaging material for an endoscope according to any one of -3, 2-4, and 2-5.

(Additional Item 2-7) The additional item 2 characterized in that the width of the first space portion is 2 mm to 10 mm.
The packaging material for an endoscope according to any one of -1, 2-2, 2-3, 2-4 or 2-5.

[0072]

As described above, according to the endoscope of the present invention, since the outer diameter of the insertion portion is formed to be smaller than at least the maximum outer diameter of the hard tip portion, the endoscope having the cleaning sheath attached thereto can be used. There is an effect that water supply and suction can be favorably performed without increasing the outer diameter of the insertion portion of the mirror.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing a configuration of an endoscope and an objective lens cleaning sheath according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a longitudinal cross section of the distal end portion of the endoscope equipped with the objective lens cleaning sheath of FIG.

3 is a configuration diagram showing a configuration of a modified example of the endoscope and the objective lens cleaning sheath of FIG.

FIG. 4 is a cross-sectional view showing a longitudinal cross section of the distal end portion of the endoscope equipped with the objective lens cleaning sheath of FIG.

FIG. 5 is a cross-sectional view showing a longitudinal cross section of a distal end portion of an endoscope equipped with an objective lens cleaning sheath according to a second embodiment of the present invention.

6 is a cross-sectional view showing a cross section taken along the line AA of FIG.

FIG. 7 is a configuration of an endoscope packaging material and an endoscope packaging material according to an embodiment of the present invention, which is capable of preventing damage to a portion of the endoscope that is weak against external force when the endoscope is taken out. Configuration diagram showing

8 is an enlarged configuration diagram showing a configuration of a packaging material for an endoscope in a portion for accommodating a curved portion in FIG.

9 is an enlarged configuration diagram showing a configuration of a packaging material for an endoscope in a portion that houses the camera connector portion of FIG.

FIG. 10 is an enlarged configuration diagram showing a configuration of a first modified example of the endoscope packaging material of the portion that houses the bending portion of FIG.

FIG. 11 is an enlarged configuration diagram showing a configuration of a second modified example of the endoscope packaging material of the portion that houses the bending portion in FIG.

FIG. 12 is an enlarged configuration diagram showing a configuration of a third modified example of the endoscope packaging material of the portion that houses the bending portion in FIG.

FIG. 13 is an enlarged configuration diagram showing a configuration of a fourth modified example of the endoscope wrapping material in the portion that houses the bending portion in FIG.

FIG. 14 is an enlarged configuration diagram showing a configuration of a modified example of a packaging material for an endoscope in a portion for accommodating a camera connector portion in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Endoscope 2 ... Operation part 3 ... Insertion part 4 ... Tip hard part 5 ... Bending part 6 ... Hard insertion part 7 ... Pin 11 ... Objective lens cleaning sheath 12 ... Sheath insertion part 13 ... Sheath body 14 ... Sheath hard part 15 ... Sheath soft part 16 ... Sheath tip part 17 ... Base 18 ... Cam groove 31 ... Opening part 32 ... Objective lens 33 ... Nozzle 34 ... Clearance 41 ... Groove 42 ... Flow path 43 ... Inclined part 44 ... Water supply port

Claims (1)

[Claims] 1. An objective lens having an elongated insertion portion and a tip hard portion connected to a tip portion of the insertion portion, the objective lens being provided on the tip hard portion and covering the insertion portion and the tip hard portion. In an endoscope in which a cleaning sheath for cleaning a cylindrical objective lens for cleaning the body can be mounted, an outer diameter of the insertion portion is formed to be at least smaller than a maximum outer diameter of the distal end hard portion. mirror.