JPH06315453A - Endoscope - Google Patents

Abstract

PURPOSE:To improve the water-tightness and washability of an endoscope by covering the head portion with the first outer sheath fixed to the head portion and the removable second outer sheath. CONSTITUTION:The cross section of the end near at hand of a removable head cover 8B is of almost C shape. A pair of extended click portions 64s surrounds a fixed head cover 8A, and these click extended ends are not connected. The fixed head cover is provided with click engaging grooves 63, with which the click portion is engaged so that it holds the click engaging grooves, when the removal head cover is slided from the head of the endoscope unit. The click engaging grooves are provided with a click stopper projection 65 at the center of them. When the click portion is engaged with the click engaging groove, the removal head cover is fixed to the head of the endoscope unit so that it does not move in the axial, right angle to the axis, and rotational direction.

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 distal end cover detachably attached to its distal end.

[0002]

2. Description of the Related Art Conventionally, the body of the distal end portion of an endoscope (base material constituting the distal end portion) has been covered with an exterior member fixed to the body of the distal end portion. The exterior member insulates the metal part of the tip body, makes the outer circumference of the tip body watertight, reinforces the weak portion of the connection between the tip body and other parts, etc. It has a function of easily inserting the outer peripheral shape of the main body into the body cavity and adjusting the shape so as not to damage the body cavity.

[0003]

Although such an exterior member is composed of one part and is fixedly adhered to the tip end main body, dirt is prevented from entering between the exterior member and the tip end main body. There is a manufacturing difficulty in completely filling the adhesive.

The germs near the entrance of the skimmer can be easily killed by the disinfectant solution, but it takes a lot of time to kill the germs at the back of the skimmer with the disinfectant solution. Further, in the endoscope in which the forceps raising base is provided at the outlet of the forceps channel, the forceps raising base is provided in the concave portion surrounded by the tip end body and the exterior member, and the dirt in the concave portion is prevented. In order to remove it, it took a lot of time such as immersing it in a cleaning solution for a long time.

On the other hand, there has been proposed a structure in which the exterior member is detachably attached to the tip end main body to facilitate cleaning of the inside of the recess. However, in the case where the exterior member is detachable, the level of electrical insulation when the exterior member is attached, the water tightness is deteriorated, and the connection between the tip end body and other parts such as There was a problem that the strength became weak.

The present invention has been made to solve the above problems, and an object of the present invention is to fix the first portion fixed to the tip end main body.
It is an object of the present invention to provide an endoscope capable of improving watertightness and cleanability by configuring the distal end body by covering the outer casing member and the detachable second outer casing member.

[0007]

In order to achieve such an object, the present invention provides an endoscope in which a tip body is covered with an exterior member, wherein the exterior member is the tip body. And a second exterior member that is detachably attached to the distal end portion main body.

[0008]

The exterior member is detachably attached to and attached to the distal end body of the endoscope while the first exterior member is left in the distal end body of the endoscope. .

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An endoscope according to a first embodiment of the present invention will be described below with reference to FIGS. As shown in FIG. 1, the endoscope 1 according to the present embodiment includes an operating portion 4 and an insertion portion 3 that extends from the operating portion 4 and that is insertable into and removable from a body cavity of a patient. ing.

The insertion portion 3 includes a flexible tube portion 7 and a bending portion 6.
And a tip portion 5. A plastic tip cover 8 is provided at the tip portion 5, and a plastic treatment tool lift base 9 is rotatably supported on the tip cover 8 via a plastic treatment tool lift base rotation shaft 10. Is provided.

As shown in FIGS. 2 to 4, the tip cover 8 is composed of a fixed side tip cover 8A and a second exterior member, that is, a detachable side tip cover 8B. A raising stand storage chamber 11 is provided. The treatment instrument raising base 9 described above is housed in the treatment instrument raising base storage chamber 11.

A distal end portion of a raising operation wire 12 made of a stainless stranded wire is rotatably connected to the treatment instrument raising base 9 via a raising operation wire connecting portion 13. The proximal end portion of the raising operation wire 12 is connected to the raising operation wire advancing / retreating operation device 14 via the raising operation wire connecting member 19, and the raising operation wire advancing / retreating operation device 14 is connected.
Are stored in the raising operation wire advancing / retreating operation device storage chamber 23 provided in the operation unit 4.

The distal end cover 8 is provided with a raising operation wire insertion hole and a treatment instrument insertion hole on the extension of the raising operation wire insertion channel 24 and the treatment instrument insertion channel 25 provided in the endoscope 1. ing.

The treatment instrument 2 is inserted through the treatment instrument insertion channel 25. The treatment instrument 2 has a tip cup 27 at its tip and a tip cup opening / closing section 29 at its base. It is provided, and these are connected via the sheath portion 28.

The tip cup 27 is constructed so as to be able to project outward from the tip cover 8 through the treatment instrument insertion hole, and can be opened and closed by operating the tip cup opening / closing section 29.

The distal end cover 8, the treatment instrument raising base 9, the treatment instrument raising base rotating shaft 10, the raising operation wire 12, and the raising operation wire connecting portion 13 are one set, and the endoscope main body tip portion 3 is provided.
It is detachably attached to 2.

This set is for single use and is delivered to the user after radiation sterilization in a peel pack. When the finger-holding knob 18 is rotated, this turning force rotates the pinion shaft 35 and the pinion 16 via the connecting rod 17. As a result, the rack 15, the raising operation wire connecting member 19, and the raising operation wire 12 move forward and backward to raise and lower the treatment instrument raising base 9.

The rack 15 is provided with stoppers 20 and 21, and the operating portion 4 is provided with a stopper 22. By these stoppers 20 to 22, the rack 15 and the raising operation wire connecting member 19 are moved forward and backward and their positions. The amount of movement is regulated.

The raising operation wire 12 is detachably connected to the rack 15 via a raising operation wire connecting member 19. The operation part 4 has a connection part storage chamber 30,
The raising operation wire connection member 19 is configured to be movable back and forth in the connection portion storage chamber 30.

A wire plug 33 made of an elastic member is provided at the opening on the proximal side of the raising operation wire insertion channel 24. When the raising operation wire 12 is inserted, the raising operation wire insertion channel 24 is inserted. The airtightness at the end is secured.

A brush portion 34 is provided in the middle of the raising operation wire 12, and when the raising operation wire 12 is removed from the raising operation wire insertion channel 24, the inside of the raising operation wire insertion channel 24 is removed. It is configured to brush and clean the peripheral surface. In particular, dirt may enter from the tip side of the raising operation wire insertion channel 24 during the endoscopic examination (note that the dirt is the wire plug 3).
3 does not invade to the proximal side of the raising operation wire insertion channel 24), and the dirt can be brushed and removed by the brush portion 34. The inner diameter of the raising operation wire insertion channel 24 is defined so that the brush portion 34 can be inserted therethrough.

A forceps plug 26 made of an elastic member is provided at the proximal end of the treatment instrument insertion channel 25.
The bending portion 6 is formed by connecting the node rings 38 supported by the node ring rotating shaft 39 (see FIGS. 2 and 3), and a bending operation knob (not shown) provided on the operation portion 4 is provided. It is configured to be bendable vertically and horizontally by operating.

In the tip portion 5, an objective lens, CC
D, a lighting window, an air / water supply channel, a water absorption channel system, etc. are built in. As shown in FIGS. 2 to 4, the cross-sectional shape of the proximal end of the removable front cover 8B is defined as a substantially C-shape as shown in FIG. That is, the pair of click portions 6 is provided so as to surround the fixed side tip cover 8A.
4, 64 extend, and the extending ends of the pair of click portions 64, 64 are not connected to each other and are cut off so as not to form a full circumference.

The fixed side tip cover 8A has a click portion 6
4 has a click portion fitting groove 63 corresponding to 4,
When the detachable side tip cover 8B is covered from the tip side of the endoscope body tip section 32, the click section 64 is fitted so as to grip the click section fitting groove 63.

The click portion fitting groove 63 is formed in the click portion fitting groove 63 so as to divide the click portion fitting groove 63 into two parts.
(See FIG. 4) are provided. As a result, when the click portion 64 is fitted in the click portion fitting groove 63, the detachable-side tip cover 8B is locked to the endoscope body tip portion 32 in the axial direction, the direction perpendicular to the axis, and the rotation direction. Be maintained in a closed state. Therefore, even when the pressing force generated when the treatment instrument raising base 9 is pressed in the distal direction by the protrusion of the treatment instrument 2 (see FIG. 1) or the reaction force of the treatment instrument when the treatment instrument is raised acts on the detachable side. The tip cover 8B is maintained in a locked state and does not fall off.

As described above, the detachable side end cover 8B is substantially C-shaped.
The click portion 64 can be increased in length due to the character shape. As a result, the click portion 64 is easily elastically deformed at the time of mounting, and the mounting property is also improved. Moreover, the rotation of the detachable-side tip cover 8B in the rotational direction can also be restricted.

In this embodiment, the substantially C-shaped portion (click portion 64) is provided at the end, but it does not have to be the end. Further, the angle of the click portion locking projection 65 does not have to be the left 90 ° direction as in the present embodiment, but may be more upward or downward.

Further, the click portion 6 is prevented from scratching the observation window 49 or the illumination window 54.
Since it is better that the lower end of 4 is located below the surface of the observation window 49 or the illumination window 54, the click portion locking projection 65
Is preferably formed on the lower side than the 90 ° left side.

It is also preferable that the tip ends of the pair of click portions 64, 64 are slightly separated from each other without being brought into contact with the click portion locking projections 65. Furthermore, the length of the pair of click portions 64 does not have to be uniform, and the number of click portions 64 may be one. Further, it is also preferable to dispose the pair of click portion fitting grooves 63 and the pair of click portions 64 at different positions in the axial direction.

Further, the fixed side tip cover 8A is provided with a locking projection 61, and the removable side tip cover 8B is provided with a locking recess 62 (see FIG. 3). The protrusion 61 and the locking recess 62 are configured to fit together.

The locking projections 61 and the locking recesses 62 are not circular but are defined, for example, in a substantially square non-circular shape. Therefore, the attaching / detaching side tip cover 8B is maintained in a state of being locked in both the direction perpendicular to the axis and the rotation direction by the engaging projection 61 and the engaging recess 62, and the detachable side end cover 8B is detached during use of the treatment tool. Prevention is secured.

Since the locking projection 61 is provided at the tip of the distal end portion 32 of the endoscope body, the locking effect of the detachable side tip cover 8B is great. Moreover, by providing the click portion 64 at the proximal end of the detachable side end cover 8B, the locking effect becomes extremely large.

The inner diameter of the above-mentioned raising operation wire insertion channel 24, that is, the inner diameters of the wire insertion rigid pipe 41 and the wire insertion flexible pipe 42 is defined to be a diameter through which the brush portion 34 (see FIG. 1) can pass. Has been done.

By providing the brush portion 34 on the raising operation wire 12 in advance, when the raising operation wire 12 is pulled out, at the same time, brushing in the raising operation wire insertion channel 24 is performed, so that operability is improved. Is achieved.

The position of the brush portion 34 does not have to be in the raising operation wire insertion channel 24, and may be arranged, for example, in the connection portion accommodating chamber 30 in order to reduce the amount of forward / backward force.

It is also preferable that the raising operation wire insertion channel 24 is brushed by using a dedicated brush other than the brush portion 34. Tip body 36
A part of it is covered with the fixed-side tip cover 8A, and other parts such as the tip surface shown in FIG. 2 and the right side surface shown in FIG. 4 are covered with the detachable-side tip cover 8B.

The distal end body 32 is attached to the distal end portion 32 of the endoscope main body.
There are weak parts such as the tip of the air / water nozzle 46, the light guide storage chamber closing member 59, and the curved portion covering rubber 37, which are connected to the air / water feeding tube 47 via 6, and these are fixed side tip covers. It is configured to be fixedly covered and protected by 8A.

Further, a filler filling portion 60 is appropriately provided on the outer periphery of the contact portion between the tip end main body 36 and the fixed side tip cover 8A, and a filler (not shown) is filled in the filler filling portion 60. By filling and applying, the tip body 36
It is ensured that the dirt is prevented from entering the joint gap formed between the fixed side tip cover 8A and the fixed side tip cover 8A.

The outer circumference of the joint between the wire insertion rigid pipe 41 and the distal end body 36, and the treatment instrument insertion rigid pipe 43.
The filler filling portion 60 is also provided on the outer periphery of the joint between the tip body 36 and
Is provided.

The curved portion covering rubber 37, the fixing thread and adhesive 40 for the curved portion covering rubber, the fixed side tip cover 8A, the air / water nozzle 46, the wire insertion rigid pipe 41, the treatment instrument insertion rigid pipe 43, and the observation window 49. , The illumination window 54, the light guide fiber 55, the objective lens 51, the CCD 52 to which the signal cable 53 is connected, the prism 50, and the like, the detachable side tip cover 8B, the treatment instrument raising base 9, and the tip left after removing the raising operation wire 12. The outer periphery of the endoscope body distal end portion 32 which is the portion 5 has an extremely smooth and simple shape, and there is no portion where dirt is stuck.

Further, the bottom portion of the click portion fitting groove 63 of the fixed side front end cover 8A is defined as an R shape, and
Since the root portion of the locking projection 61 is also defined as an R shape,
When the distal end portion 32 of the endoscope main body is washed, it can be easily and surely cleaned.

The outer periphery of the abutting portions of the fixed-side tip cover 8A and the detachable-side tip cover 8B are chamfered or R-chamfered with each other so as not to damage the body cavity when the insertion section 3 is inserted into the patient. ing.

As described above, the treatment instrument raising base 9 is housed in the treatment instrument raising base storage chamber 11. Specifically, the treatment instrument raising base storage chamber 11 includes the distal end main body 36 and the fixed side tip. It is positioned in a recess surrounded by the cover 8A and the detachable-side tip cover 8B.

By removing the detachable side tip cover 8B, the tip body 36 and the fixed side tip cover 8A forming the recess can be easily washed. Furthermore,
Cleaning of the treatment instrument raising base 9 fixed to the fixed-side tip cover 8A or the tip portion main body 36 also becomes easy.

Attachment / detachment side tip cover 8B and treatment instrument raising base 9
A treatment tool raising base locking member 45 having a function of locking the treatment tool raising base 9 at a predetermined position, for example, in an inverted state, is provided in advance. As a result, when the detachable-side tip cover 8B, the treatment instrument raising base 9, and the raising operation wire 12 are attached to the endoscope body tip portion 32, when the raising operation wire 12 and the raising operation wire connecting member 19 are connected to each other. The position of the raising operation wire 12 in the axial direction can be positioned with high accuracy.

The treatment instrument raising base locking member 45 is made of soft plastic and is detachable after the raising operation wire 12 is connected to the raising operation wire connecting member 19.

As shown in FIG. 2, the portion to be fitted into the treatment instrument insertion channel 25 is provided with the treatment instrument raising base locking member 4.
5 may be provided. The treatment tool raising base locking member 45 is defined to have a diameter larger than that of the curved portion 5, and is further provided with a prominent color such as red or yellow. Therefore, when the insertion portion 3 (see FIG. 1) is inserted into the patient, it is possible to prevent the adverse effect that the treatment tool raising base locking member 45 is still inserted.

The treatment instrument raising base locking member 45 fixes the treatment instrument raising base 9 and the detachable-side tip cover 8B to the endoscope body distal end portion 32, and raises the treatment instrument raising base 9. It is similarly effective when the operation wire 12 is detachably configured.

The tip of the wire insertion rigid pipe 41 is tapered. Further, between the wire insertion rigid pipe 41 and the wire insertion flexible pipe 42, between the wire insertion rigid pipe 41 and the distal end portion main body 36, and between the treatment instrument insertion rigid pipe 43 and the treatment instrument insertion flexible pipe 44. while,
The treatment instrument insertion rigid pipe 43 and the distal end portion main body 36 are water-tightly bonded between the distal end portion main body 36 and the curved portion covering rubber 37, respectively.

An adhesive is filled between the tip of the curved portion covering rubber 37, the fixing thread for the curved portion covering rubber and the adhesive 40 and the proximal end of the fixed side tip cover 8A so as to prevent dirt from entering. .

Air / water supply nozzle 46 and air / water supply tube 4
7, between the air / water nozzle 46 and the tip body 36, between the observation window 49 and the tip body 36, between the illumination window 54 and the tip body 36, and the light guide storage chamber closing member 5.
9 is water-tightly bonded to the tip end main body 36, and between the curved portion covering rubber 37 and the node ring 38.

The click portion fitting groove 63 and the click portion 64 of the fixed side tip cover 8A and the detachable side tip cover 8B are
The diameter is relatively thicker than the other portions, and the tip end sides of the click portion fitting groove 63 and the click portion 64 are gently tapered.

The wire insertion rigid pipe 41, the treatment instrument insertion rigid pipe 43, and the tip of the tip portion main body 36 are aligned in the same plane. Further, around the air / water feeding nozzle 46, an adhesive filling portion 48 is provided between the tip body 36 and the fixed-side tip cover 8A.

A light guide fiber 55 and a light guide fiber coating tube 56 are housed in a light guide housing chamber 57 provided in the tip body 36.
The light guide fiber 55 and the light guide fiber coating tube 56 are fixed by a filler 58. Further, the light guide storage chamber 57 is closed by a light guide storage chamber closing member 59, and the light guide storage chamber closing member 59 is further covered by the fixed side tip cover 8A.

The tip body 36, the wire insertion rigid pipe 41, the treatment instrument insertion rigid pipe 43, the air / water nozzle 46, and the light guide storage chamber closing member 59 are all made of stainless steel, while the wire insertion flexible pipe is provided. The flexible pipe 42, the treatment instrument insertion flexible pipe 44, and the air / water supply tube 47 are
Both are made of Teflon tubes.

As shown in FIG. 5, the rack 15 extends through the operating portion exterior member 66 toward the tip side,
A portion corresponding to the packing 68 provided on the operation portion exterior member 66 during the forward / backward operation is configured as a watertight portion 69 having a circular cross section. Further, a screw portion 70 is provided at the tip thereof.

The rack 15 includes a pinion 16 (see FIG. 1).
(Refer to FIG. 3), it is configured to move forward and backward but not rotate. Wire insertion flexible pipe 42
The proximal end of the wire is a wire insertion rigid pipe / wire plug attachment part 6
7, and the wire insertion rigid pipe / wire plug attachment portion 67 is water-tightly attached to the operation portion exterior member 66.

The ends of the wire insertion rigid pipe 41 (see FIG. 2) and the wire insertion rigid pipe / wire plug attachment portion 67 are formed in a tapered shape, and the raising operation wire insertion channel 24 (FIG. 2). (See) the inner diameter is changing slowly. Therefore, when the brush portion 34 (see FIG. 1) is passed through the raising operation wire insertion channel 24, the end portions of the wire insertion rigid pipe 41 and the wire insertion rigid pipe / wire plug attachment portion 67 are reliably cleaned. Is applied and is not left unwashed.

A threaded hole 71 and a wire fitting hole 72 are formed on both sides of the raising operation wire connecting member 19,
The sectional shape perpendicular to the axial direction is defined as a substantially quadrangular shape. Each of the screw hole 71 and the wire fitting hole 72 has a stop shape, and the wire fitting hole 72 is provided with a small diameter portion at two positions, an entrance and a back, and a large diameter portion in the middle. In the large diameter part,
One screw hole 73 is formed across it.

At the proximal end of the raising operation wire 12, a hard portion 75 is provided by a length corresponding to the wire fitting hole 72, and the end is formed in a hemispherical shape. The formation of such a hemisphere is performed by a plasma treatment method, while the formation of a hardened material is performed by a plasma treatment method, a high frequency treatment method, or a brazing method.

The length of the insertion portion 3 (see FIG. 1) is determined by the endoscope 1
There is some variation for each. Further, the length of the raising operation wire 12 also varies to some extent for each endoscope 1. Therefore,
In order to optimize the connection state between the endoscope 1 and the raising operation wire 12, the axial positions of the endoscope 1 and the raising operation wire 12 are adjusted at the time of connection.

The connection method will be described below. As shown in FIG. 2, a treatment instrument raising base 9 is connected to the removable tip cover 8B in advance via a treatment instrument raising base rotating shaft 10. The treatment instrument raising base 9 has a raising operation wire 12 Are connected. Further, a treatment instrument raising base locking member 45 is set on the detachable side tip cover 8B and the treatment instrument raising base 9, and the treatment instrument raising base 9 is locked in an inverted state.

In this state, the detachable side end cover 8B, the treatment instrument raising base 9, the raising operation wire 12, and the treatment instrument raising base locking member 45 are sealed in a peel pack in a sterilized state.
After the detachable-side tip cover 8B, the raising operation wire 12, the wire plug 33, the forceps plug 26, and the raising operation wire connecting member 19 are removed, a clean and sterilized endoscope 1 is prepared.

As shown in FIG. 5, the wire stopper 33 which has been cleaned and sterilized, the raising operation wire connecting member 19, and the pointed thumbscrew 7 are used.
Prepare 4. The insertion portion 3 of the endoscope 1 is positioned in a straight state together with the bending portion 6 and the flexible tube portion 7. Finger hold knob 1
8 is operated to position the rack 15 and the screw portion 70 at the uppermost position (on the right side in the plane of FIG. 5).

A raising operation wire connecting member 19 is attached to the screw portion 70.
After being screwed in until it hits, the wire plug 33 is attached to the wire insertion rigid pipe / wire plug attachment portion 67. With the peel pack open, the raising operation wire 12 is inserted into the wire insertion rigid pipe 41 from the proximal end.

Next, as shown in FIG. 3, the detachable side tip cover 8B is attached to the endoscope body tip portion 32 (fixed side tip cover 8).
It will be mounted along the outer periphery of A). At the time of mounting, the pair of click parts 64, 64 are fitted in the pair of click part fitting grooves 63, 63, and the locking recess 62 is locked. The mounting operation is performed until the protrusion 61 is locked.

As a result, the distal end of the treatment instrument raising base locking member 45 is fitted into the treatment instrument inserting rigid pipe 43, and the proximal end of the raising operation wire 12 serves also as the wire inserting rigid pipe as shown in FIG. It passes through the wire plug attachment part 67 and the wire plug 33 and projects into the connection part storage chamber 30.

Since the proximal end of the raising operation wire 12 is defined in a hemispherical shape, the inner circumference of the wire insertion flexible pipe 42 is not damaged during the mounting operation. Further, the passing operation of the wire plug 33 is easily performed.

As shown in FIG. 5, while the raising operation wire 12 is being introduced into the wire fitting hole 72, the finger-holding knob 18 is operated to move the rack 15 to the most inverted side (the left side facing upward in the plane of FIG. 5). Move to.

At this time, the raising operation wire connecting member 19 is
Since it is maintained in the most screwed state in the threaded portion 70, the proximal end of the raising operation wire 12 has a wire fitting hole 72.
I won't hit you deep inside. The length relationship and the adjustment allowance are set.

The raising operation wire connecting member 19 is moved while rotating to the left in the plane of the paper of FIG. 5, and it is felt by hand that the proximal end of the raising operation wire 12 comes into contact with the inside of the wire insertion hole 72.

Further, the raising operation wire connecting member 19 is rotationally moved in the same direction so that the screw holes 73 are arranged so as to face upward in the plane of FIG. Furthermore, the raising operation wire connecting member 19 is rotated twice in the same direction. As a result, the raising operation wire 12 is pushed in two to three times.

The pointed thumbscrew 74 is screwed into the screw hole 73 until the contacted portion 76 of the pointed thumbscrew 74 contacts the contacting portion 77 of the raising operation wire connecting member 19. Both ends of the hard portion 75 of the raising operation wire 12 are supported by the small diameter portion of the wire insertion hole 72, and a pressing force from the side is applied to the large diameter portion via the pointed thumbscrew 74. It joins, bends and transforms. Further, the tip of the pointed thumbscrew 74 slightly bites into the hard portion 75. As a result, the raising operation wire 12
Is firmly fixed to the raising operation wire connecting member 19.

Next, the treatment instrument raising base locking member 45 (see FIG. 2) is removed. By the above work, variations in the lengths of the endoscope 1 and the raising operation wire 12 are absorbed, and the optimum state is uniquely set.

That is, when the bending portion 6 or the flexible tube portion 7 is bent, the treatment instrument raising base 9 has a characteristic of being automatically raised, but the raising operation wire 12 is pushed in by a predetermined amount to be connected. Therefore, even if the bending portion 6 or the flexible tube portion 7 is bent,
The treatment instrument raising base 9 does not rise.

Further, even when the raising operation wire 12 is pushed too much and the raising operation and the inversion operation are repeated, the raising operation wire 12 is not broken in the treatment instrument raising base storage chamber 11.

Further, even if the pulling amount of the raising operation wire 12 is too small, the treatment instrument raising base 9 cannot be raised completely. That is, by operating the finger touch knob 18 until the stoppers 20 and 21 come into contact with the stopper 22, the treatment instrument raising base 9 is completely raised without being affected by the states of the bending portion 6 and the flexible tube portion 7. And can be completely inverted.

Attaching / detaching side tip cover 8B, treatment instrument raising base 9,
When removing the raising operation wire 12, first, the pointed thumbscrew 74 is removed, and then the detachable side tip cover 8B is strongly pulled toward the tip side in the axial direction.

At this time, when the detachable side tip cover 8B is for single use, the click portion 64 may be destroyed. Next, the detachable-side tip cover 8B, the treatment instrument raising base 9, and the raising operation wire 12 are discarded. Then, after removing the wire plug 33 and the rising operation wire connecting member 19, the endoscope 1, the wire plug 33, and the rising operation wire connecting member 19 are washed and disinfected.

As described above, according to this embodiment, the fixed-side tip cover 8A is fixed to the tip body 36, and the detachable-side tip cover 8B detachably covers the tip body 36. As a result, it is possible to provide an endoscope that can achieve improvement in watertightness and cleanability.

Next, an endoscope according to the second embodiment of the present invention will be described with reference to FIGS. 6 and 7. In the description of this embodiment, the same configuration as that of the first embodiment is
The same reference numerals are given and the description thereof is omitted.

As shown in FIGS. 6 and 7, the endoscope of this embodiment is a direct-viewing scope, and the detachable-side tip cover 8B.
Also serves as an air / water supply nozzle. Detachable side tip cover 8
B of the pair of click portions 64, 64 of B, FIG. 6 and FIG.
6, a nozzle base portion 80 is provided upward, and the nozzle base portion 80 extends to the left side (front end side) toward the paper surface of FIG. 6 and is bent to form a nozzle portion 79. . The inner diameter of the nozzle 79 is equal to that of the air / water supply pipe 78.
Of the observation window 49 and includes a front end opening of the observation window 49. The rest of the configuration and effects are similar to those of the first embodiment, so the description thereof will be omitted.

[0083]

According to the present invention, the tip body is covered with the first exterior member fixed to the tip body and the detachable second exterior member. It is possible to provide an endoscope that can achieve improved cleanability.

[Brief description of drawings]

FIG. 1 is a sectional view schematically showing a configuration of an endoscope according to a first embodiment of the present invention.

FIG. 2 is an enlarged sectional view showing a configuration of a portion of a tip cover shown in FIG.

FIG. 3 is an enlarged cross-sectional view schematically showing the configuration of the distal end portion of the endoscope.

FIG. 4 is a sectional view taken along line IV-IV in FIG.

FIG. 5 is an enlarged cross-sectional view schematically showing the configuration of the connection part storage chamber shown in FIG.

FIG. 6 is a sectional view schematically showing a configuration of a distal end portion of an endoscope according to a second embodiment of the present invention.

7 is a sectional view taken along line VII-VII of FIG.

[Explanation of symbols]

8A ... Fixed side tip cover, 8B ... Removable side tip cover, 6
3 ... Click portion fitting groove, 64 ... Click portion, 65 ... Click portion locking projection.

Claims (1)

[Claims] 1. An endoscope having a distal end body covered with an exterior member, wherein the exterior member includes a first exterior member fixed to the distal end body and the distal end body. An endoscope comprising: a second exterior member configured to be detachable.