JP2002017654A - Endoscope - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an endoscope which enables loading or unloading of an elastic distal end cover in safety without any damage to an endoscope, especially a cover member of a curved part while preventing damage to the parietals of a subject as caused by a leaked current from a grip part. SOLUTION: The body 102 of the distal end-constituting part 102 is provided with a retaining groove 112 and a rib 117 of the tip cover 115 is fitted into the retaining groove 112. The distal end cover 115 is mounted on the body of the distal end-consitiuting part body 102.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an endoscope in which a distal end cover is detachably attached to a distal end of an insertion portion to be inserted into a lumen to be inserted.

[0002]

2. Description of the Related Art Generally, for example, Japanese Patent Application Laid-Open No. 4-314439.
There is known a distal end cover detachable endoscope in which a distal end cover is detachably attached to a distal end portion of an insertion portion to be inserted into a lumen to be inserted, such as a side-view endoscope shown in Japanese Patent Application Publication ing. In this type of endoscope, the distal end cover is formed of a relatively hard material.

Further, Japanese Utility Model Laid-Open Publication No. Sho 51-103891 discloses an elastic insertion portion cover that covers the entire insertion portion of an endoscope. Furthermore, Japanese Patent Publication No. 2-4734 discloses an insert cover with a channel.

[0004]

However, in the above-mentioned conventional configuration, when the distal end cover is attached to and detached from the distal end portion of the distal end of the insertion portion, the endoscope to which the distal end cover is attached is attached. There is a problem that a relatively soft part such as a covering member of a curved portion and a flexible tube portion that is flexibly deformed, which is arranged behind the distal end portion, is easily damaged or damaged.

Further, Japanese Utility Model Laid-Open Publication No. Sho 51-103891,
In the insertion portion cover method that covers almost the entire insertion portion as disclosed in Japanese Patent Publication No. 2-54534, it is not necessary to clean the insertion portion itself of the endoscope after use of the endoscope. Since the length is long, there is a problem that the work of attaching and detaching the insertion section cover to and from the insertion section of the endoscope becomes troublesome.
Further, there is a problem that a long insertion portion cover requires a great deal of work for cleaning.

Further, when the insertion portion cover is made disposable, the insertion portion cover is expensive and the subject bears the cost, so that there is a problem that the treatment cost of the subject increases.

Further, when a hard tip cover as in Japanese Patent Application Laid-Open No. 4-314439 is attached to the tip component, the hard parts are fitted together, so that the fitting portion has looseness. . Therefore, if a displacement occurs in the fitting portion between the distal end cover and the distal end component during the endoscope inspection, the visual field of the endoscope may be obstructed by the distal end cover.

Here, if the fitting of the fitting portion between the tip cover and the tip component is set to be tight, it is very difficult to attach / detach the tip cover to / from the tip component. Excessive force is applied to the tip cover,
The tip cover may be damaged or deformed.

The present invention has been made in view of the above circumstances, and an object thereof is to dispose the distal end cover behind the distal end constituting portion when the distal end cover is attached to or detached from the main body of the distal end constituting portion of the insertion portion. There is no danger of damaging the relatively soft parts such as the covering member of the provided curved portion and the flexible tube portion, making a hole or the like, damaging or deforming the tip cover, and It is an object of the present invention to provide an endoscope that allows easy attachment and detachment of a tip cover and does not rattle at a fitting portion between the tip component main body and the tip cover.

[0010]

SUMMARY OF THE INVENTION The present invention is capable of being inserted into and removed from the main body of a distal end portion disposed at the distal end of an insertion portion inserted into a lumen to be inserted from the distal end side of the distal end portion main body. A tip cover made of an elastic material for covering the tip component main body, a locking portion provided on the insertion portion side for locking the insertion portion of the tip cover in a detachable manner, and the insertion portion. And a hand-holding portion disposed on a side near the locking portion.

[0011]

In the operation for attaching and detaching the distal end cover to and from the distal end component main body at the distal end of the insertion portion, the operation is carried out with the operator's fingers on the grip portion, so that the rear part of the distal end component main body can be operated. In addition, the tip cover is prevented from being damaged, and the attachment / detachment work of the tip cover is easily performed by elastic deformation of the tip cover.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a first embodiment of the present invention will be described with reference to FIGS.
This will be described with reference to FIG. FIG. 2 shows a schematic configuration of the entire system of the electronic endoscope apparatus 1. The electronic endoscope device 1 includes an electronic endoscope 2 provided with an imaging unit, a light source device 3 for supplying illumination light to the electronic endoscope 2, and an image signal obtained from the electronic endoscope 2. A video processor 4 for processing and a monitor 5 for displaying a signal processed by the video processor 4 on a screen are provided.

The electronic endoscope 2 is provided with an insertion portion 6 to be inserted into a lumen to be inserted. The insertion section 6 has an elongated flexible flexible tube section 7, a tip section 8 disposed at the tip of the insertion section 6, and the tip section 8 and the flexible tube section 7.
And a bending portion 9 that can be bent and deformed and is disposed between them.

Further, a proximal operation unit 10 is connected to the proximal end of the flexible tube unit 7. The operation unit 10 includes an operation knob 11 that bends the bending unit 9 to turn the distal end of the insertion unit 6 in a desired direction, and a forceps raising table operation lever that raises and lowers a forceps raising table 22 described below via an operation wire. 12 and the like, and the base end of the universal cord 13 is connected. A connection connector 14 is connected to the distal end of the universal cord 13.

The universal cord 13 is connected to the light source device 3 via the connector 14 and is connected to the connection cord 15 connected to the connector 14.
Is connected to the video processor 4 via the.

As shown in FIG. 1, the distal end portion 8 of the insertion portion 6 of the endoscope 2 includes a distal end portion main body 16 made of a highly corrosion-resistant metal material such as stainless steel, An end cover 17 made of an elastic material and covering an outer peripheral portion of the component body 16 is provided.

Here, a substantially planar notch 18 is formed in the distal end component main body 16 at one side of the outer peripheral surface on the distal end side. The notch 18 is provided with an optical system mounting portion 21 to which the illumination optical system 19 and the imaging optical system 20 are mounted, respectively, and also has a mounting hole 23 for the forceps raising base 22 shown in FIG. In this case, the illumination lens 24 of the illumination optical system 19 and the imaging optical system 2
0 imaging lenses 25 are juxtaposed along the axial direction of the insertion section 6. The mounting hole 23 of the forceps raising base 22 is arranged on the side of the side where the illumination lens 24 and the imaging lens 25 are juxtaposed.

Further, an output end of a light guide fiber 26 is provided below the illumination lens 24 in the optical system mounting section 21. The light guide fiber 26 is connected to the light source device 3 from within the insertion section 6 of the endoscope 2 through the operation section 10 and the universal cord 13. Then, the illumination light emitted from the light source device 3 is incident on the incident end of the light guide fiber 26, and passes through the inside of the light guide fiber 26 to form the distal end component main body 1.
The light is transmitted to the side 6 and emitted from the illumination lens 24 to the outside.

The imaging optical system 20 includes an imaging lens 25.
And an imaging device 28 such as a CCD for converting an observation image of a subject formed by the lens unit 27 into an electric signal. Here, the output signal from the imaging device 28 is transmitted to the insertion section 6 of the endoscope 2.
The signal is input from the inside to the video processor 4 via the lead wires provided in the operation unit 10 and the universal cord 13, and the signal processed by the video processor 4 is displayed on the screen of the monitor 5. .

Further, an air / water supply nozzle 29 is provided at a position near the imaging lens 25 in the distal end component main body 16. In this case, an air supply / water supply hole 30 is formed in the distal end component main body 16. And the air / water supply nozzle 29
Is an air / water supply pipe 3 fitted in the air / water supply hole 30.
1 is formed integrally with the tip.

The base end of the air / water supply pipe 31 protrudes from the rear end face of the main body 16 to the inside of the insertion section 6. An air / water supply pipe 32 is connected to a protruding end of the air / water supply pipe 31. In this case, the air / water supply nozzle 29 is incorporated into the air / water supply hole 30 of the distal end component main body 16 from the distal end side.
Is bonded and fixed with a filler 33 such as an adhesive. This prevents dirt and bacteria from entering the gap between the tip component main body 16 and the nozzle 29. Note that an ultra-fine cleaning brush can be inserted into the nozzle 29.

Further, a lid 35 for closing the mounting opening 34 of the light guide fiber 26 of the illumination optical system 19 is mounted on the lower surface of the distal end component main body 16. The lid 35 is adhered and fixed at a boundary surface with the peripheral portion of the opening 34 in the distal end component main body 16. The lid 35 is formed of an insulating material such as a synthetic resin.

The outer surface of the lid 35 is provided with a tip cover 17.
Locking projections 36 are provided integrally to protrude. The lid 35 may be formed of a metal material by means of, for example, aluminum die casting or the like, and may be fixed to the distal end component main body 16 by soldering.

Further, FIG.
As shown in (A), a screw hole 37 for fixing the light emitting end of the light guide fiber 26 to the distal end component main body 16 is formed. The light emitting end of the light guide fiber 26 is fixed to the distal end component main body 16 by a set screw 38 screwed into the screw hole 37.

The screw portion 39 on the base end side of the locking member 39 for locking the distal end cover 17 is provided on the outer end side of the screw hole 37.
a is screwed. This locking projection 39 is formed of an insulating material.

The base 22 of the forceps raising table 22 is shown in FIG.
As shown in FIG. 3, one side wall surface 23a (on the optical system mounting portion 21 side) of the forceps raising base mounting hole 23 in the distal end component main body 16.
And is rotatably supported via a raising pin 40.

Here, the side wall surface 23 of the tip component body 16
4A shows a fixing hole 4 of the raising pin 40 as shown in FIG.
1 is formed. The base end of the raising pin 40 is fitted in the fixing hole 41 and is firmly fixed by solder or an adhesive.

Further, a raising hole 42 for a raising pin 40 is formed at the base end of the forceps raising table 22. Then, the protruding portion 4 of the raising pin 40 protruding outside the fixing hole 41.
In a supporting state of the cantilever structure inserted into the raising hole 42 of the forceps raising table 22, the forceps raising table 22 is rotatably supported on the side wall surface 23 a via the raising pin 40. Has become.

Here, the elevating pin 40 is connected to the distal end component main body 1.
6 is disposed in a portion near the outer peripheral surface. Therefore, when the length of the raising pin 40 is increased,
The length of the raising pin 40 is limited to a relatively short length because the leading end of the zero protrudes outside the leading end component body 16. Therefore, by fixing the raising pin 40 to the side wall surface 23a while supporting the cantilever structure, the forceps raising table 22 is fixed.
The length of the sliding contact portion between the lifting pin 40 and the lifting pin 40 can be set relatively long. The length of the sliding contact portion between them becomes shorter, and it is possible to prevent rattling during the operation of the forceps raising table 22.

The raising pin 40 is connected to the distal end component main body 16.
The outer diameter of the fixing portion 40 b fitted and fixed in the fixing hole 41 of the projection portion 4 protrudes outside the fixing hole 41.
It is set to be larger than 0a so as to prevent misalignment of the raising pin 40 and increase the strength of the raising pin 40.

Further, a stopper 43 for preventing the forceps raising table 22 from coming off from the raising pin 40 is provided at the tip of the raising pin 40. Further, a plurality of continuous grooves 44 for disinfectant injection are formed around the raising hole 42 of the forceps raising table 22 as shown in FIG. A contact portion 45 with the raising pin 40 is formed by the tip of the portion between the continuous grooves 44. Therefore, two or more contact portions 45 are provided between the raising hole 42 of the forceps raising table 22 and the raising pin 40, and the contact with the raising pin 40 via the two or more contact portions 45. By doing so, rattling between the forceps raising table 22 and the raising pin 40 is prevented.

One of the continuous grooves 44 is formed by a deep groove 46 which is larger and deeper than the retaining portion 43 provided at the tip of the raising pin 40. In this case, the retaining portion 43 and the deep groove 46 are arranged in a positional relationship such that the forceps raising base 22 does not fall out of the raising pins 40 during a normal rotation operation of the forceps raising base 22 such as a raising operation of the forceps raising base 22. Have been. In addition, a raising pin 40 is provided on the lower surface of the forceps raising table 22.
Shaving part 4 which is shaved off the part other than the periphery of the connecting part with
7 are formed.

Further, a circular connection hole 49 is formed at the distal end of the forceps raising base 22 to which the distal end of the raising operation wire 48 is connected. The connecting operation hole 4 is provided in the connection hole 49.
A connecting shaft 50 fixed to the end of the connecting member 8 is slidably connected. In this case, a wire fixing hole 51 into which the tip of the raising operation wire 48 is inserted is formed in the axis of the connecting shaft 50.

Further, on the outer peripheral surface of the connecting shaft 50, a plurality of semicircular grooves 5 for injecting a disinfecting solution having a substantially semicircular shape along the circumferential direction.
2 are formed. A contact portion 53 between the semicircular groove 52 and the inner peripheral surface of the connection hole 49 is formed by the tip of the portion between the semicircular grooves 52.
Are formed. Therefore, two or more contact portions 53 are provided between the inner peripheral surface of the connection hole 49 of the forceps raising table 22 and the connection shaft 50, and the forceps raising table 22 is provided via the two or more contact portions 53. By contacting the inner peripheral surface of the connecting hole 49, rattling between the forceps raising base 22 and the connecting shaft 50 is prevented. Note that each semicircular groove 52 has a groove depth of 0.2 so that the disinfecting solution can be easily injected.
It is desirable to set it to about mm or more.

The proximal end of the raising operation wire 48 is connected to the forceps raising table operation lever 12 of the operation section 10.
Then, the raising operation wire 48 is pulled in accordance with the operation of the forceps raising table operation lever 12, and the forceps raising table 22 is moved from the standby position shown in FIG. It is designed to be rotated to the forceps raising position shown.

Further, the forceps channel connecting hole 5 communicated with the mounting hole 23 of the forceps raising base 22
4 are formed. The distal end of the forceps channel connection pipe 56 is inserted into the forceps channel connection hole 54,
It is fixed in the butted state. Then, the gap 57 between the abutting portion of the distal end portion of the forceps channel connecting pipe 56 and the distal end component main body 16 is filled with an adhesive.

Further, a working hole 58 is formed in the distal end component main body 16 between the forceps raising base 22 and the forceps channel connecting pipe 56. The hole 58 is provided to improve the workability of the application operation when applying the adhesive to the gap 57.

Above the working hole 58, a curved guide portion 59 having a smooth arc shape is formed to guide the bending of the forceps extended toward the forceps raising base mounting hole 23 through the forceps channel connection pipe 56. ing. Since the curved guide portion 59 is integrally formed with the distal end component main body 16 formed of a highly corrosion-resistant metal material such as stainless steel, the insertion of the forceps when the forceps raising base 22 is raised upward. It is designed to prevent shaving due to removal.

The distal end cover 1 of the distal end component main body 16
Reference numeral 7 is formed of a material having temperature resistance enough to withstand autoclave sterilization, biocompatibility, electrical insulation, and a higher tear strength, for example, a material such as silicon rubber or fluoro rubber.

Further, the distal end cover 17 is provided with a substantially cylindrical cover body 60 which is removably inserted into the distal end component main body 16 from the distal end side of the distal end component main body 16. At the distal end of the cover main body 60, a locking hole 62 that engages with a distal end cover locking projection 61 protruding from the distal end surface of the distal end component main body 16 is provided.

Here, the tip cover locking projection 61 is disposed at a position eccentric to the center axis of the tip component main body 16 on the tip surface of the tip component main body 16. The tip cover locking projection 61 is provided with a head portion 61a, a root portion 61b having a smaller diameter than the head portion 61a, and a male screw portion 61c protruding from the tip of the root portion 61b. The male screw portion 61 c of the tip cover locking projection 61 is screwed into a screw hole 63 formed on the tip surface of the tip component main body 16.

The engaging hole 62 of the cover body 60 engages with the large-diameter hole 62a engaged with the head 61a of the tip cover engaging projection 61, and the root 61b of the tip cover engaging projection 61. And a small-diameter hole portion 62b to be provided.

Further, the cover body 60 of the tip cover 17
In order to secure easy detachability and strength not to be damaged during the case, the rubber material has a rubber hardness within a range of 40 to 80 °, an optimum value is set to 70 °, and a wall thickness is about 0 °. .0
It is set to 5 to 3 mm. The inner diameter of the cover body 60 of the tip cover 17 is set to a ratio of 0.7 to 1 with respect to the outer diameter of the tip component main body 16. Therefore, by tightening the distal end component body 16 using the elasticity of the distal end cover 17, the back end of the distal end cover 17 is loosened,
It is designed to prevent falling off.

An opening 64 is formed in the cover main body 60 of the distal end cover 17 at a portion corresponding to the optical system mounting portion 21 and the forceps raising base mounting hole 23 of the distal end component main body 16. Then, the optical system mounting portion 21 is
The illumination lens 24, the imaging lens 25, and the forceps raising stand mounting hole 23 are exposed to the outside.

Further, a ring-shaped connecting portion 65 is provided at the insertion end on the rear end side of the cover main body 60. The connecting portion 65 has a width of at least 0.2 mm or more, and extends to a portion near a joint between the curved portion 9 and the distal end component main body 16. As a result, the entire connecting portion 65 can be firmly locked over the entire joining portion between the bending portion 9 and the distal end component main body 16.

The distal end component main body 16 is provided with a locking portion 66 for removably locking the insertion end of the cover main body 60 of the distal end cover 17. The locking portion 66 has a cover 35 of the light guide fiber mounting opening 34 described above.
Together with the locking projection 36 and the locking member 39 of the screw hole 37,
A pair of locking projections 67, 67 are provided.

Here, the pair of locking projections 67, 67 are shown in FIG.
As shown in (B), it is protruded from the outer peripheral portion of the substantially arc-shaped fixing member 68. The fixing member 68 is fitted and embedded in an arc-shaped fixing groove 69 formed on the outer peripheral surface of the distal end component main body 16.

The fixing groove 69 is provided in the air / water supply hole 3 into which the air / water supply pipe 31 provided in the distal end component main body 16 is fitted.
It is provided without avoiding zero. When fitting the air / water supply pipe 31 into the air / water supply hole 30, the air / water supply pipe 31 is fitted into the distal end component main body 16, and then the fixing groove 6 is inserted.
The sealing between the exposed portion of the air / water supply pipe 31 and the tip component main body 16 in FIG. 9 is filled with a filler such as an adhesive to ensure watertightness.

Further, a concave portion 70 is formed in the inner peripheral portion of the fixing member 68 to avoid a portion of the air / water supply pipe 31 projecting from the fixing groove 69. Accordingly, the fixing member 68 can be embedded in the relatively deep fixing groove 69 without adversely affecting the layout of the internal components of the distal end component main body 16, and the fixing member 6 can be embedded.
8 can be firmly fixed.

As shown in FIG. 5A, the locking projections 67 are provided with locking holes 71, 7 formed in the front cover 17.
1 so as to be detachably engaged. here,
The height of the locking projection 67 is set to be substantially equal to the position of the outer surface of the tip cover 17.

Further, as shown in FIG. 5 (D), each of the locking projections 67 is formed in a wedge shape in which the outside is thick and the inside is thin. In this case, as shown in FIG. 5 (C), each locking hole 71 of the front cover 17 is formed with a wedge-shaped peripheral wall that is large on the outside and small on the inside according to the shape of the locking projection 67. When the locking projection 67 is engaged with each of the locking holes 71 of the tip cover 17, the locking projection 67 does not easily come off.

Further, each locking projection 67 is formed of an insulating material, for example, resin, ceramics or the like.
7 is configured to be insulated from the front end component main body 16.

As shown in FIG. 3, an insulating portion 72 mounted above the curved guide portion 59 of the distal end component main body 16 is integrally formed on the inner end side of the connecting portion 65 of the cover main body 60 of the distal end cover 17. It is provided in. For example, at the time of high-frequency incision with a papillotome knife, the tip component main body 16 and the papillotome knife are prevented from coming into contact with each other, thereby preventing a short circuit.

Further, on the insulating portion 72, engaging convex portions 75, 76 which are engaged with engaging concave portions 73, 74 formed at the joint portion of the distal end component main body 16 with the insulating portion 72 protrude. The engaging portion forms a displacement preventing means 77 for preventing the displacement of the insulating portion 72 when the treatment tool is inserted and removed.

The tip cover 17 is provided with a projection 78 that is inserted into the working hole 58 of the tip component main body 16. The protrusion 78 prevents the distal end cover 17 from coming off, and prevents the treatment tool from being caught on the opening edge of the working hole 58 when a treatment tool (not shown) is inserted through the forceps channel.

FIG. 4B shows the configuration of the distal end component main body 16.
As shown in the figure, the side wall surface 23a on the opposite side to the side wall surface 23a on the side of the optical system mounting portion 21 that guides the lifting and lowering of the forceps raising table 22
A locking hole 79 is provided in b to constitute a drop-off preventing means for preventing the tip cover 17 from dropping off. A locking projection 80 projecting from the inner peripheral surface of the front cover 17 is engaged with the locking hole 79.

Further, a relatively hard reinforcing member 81 is fitted on the outer peripheral surface of the locking projection 80. This reinforcing member 8
1 includes a buried portion 81 a buried in a thin-walled portion 82 arranged on the side of the forceps raising table 22 on the periphery of the opening 64 in the distal end cover 17, and an outer peripheral surface of the locking projection 80. A tubular fitting portion 81b to be fitted is provided.

The reinforcing member 81 is formed by pressing or molding with a material having corrosion resistance, such as metal or resin, and has a suitable thickness of 0.1 to 1 mm. The reinforcing member 81 is insert-molded on the front cover 17.

Further, the embedded portion 81a of the reinforcing member 81
Is provided with a hole 83. And this reinforcing member 8
When 1 is insert-molded into the front cover 17, the rubber material of the front cover 17 enters the holes 83 to increase the peel strength between the front cover 17 and the reinforcing member 81.

Therefore, the embedded portion 8 of the reinforcing member 81
1a prevents not only the displacement of the reinforcing member 81 and the protrusion of the reinforcing member 81 from the tip cover 17 during the case, but also the displacement of the tip cover 17 in the axial direction and the rotation direction. Opening 6 at 17
In the case, the thin-walled portion 82 disposed on the side of the forceps raising base 22 at the periphery of the thinner 4 is cut off by raising and lowering the forceps raising base 22 in the case, or the forceps raising base 22 and the tip component main body 16 are cut off. The forceps raising table 22 is prevented from being malfunctioned by being sandwiched therebetween.

The inner peripheral surface of the tip cover 17 has a structure shown in FIG.
As shown in (A), a rib 84 is provided to be inserted into the forceps raising base mounting hole 23 of the distal end component main body 16. The rib 84 is formed corresponding to the shaved portion 47 of the forceps raising base 22 so as to prevent the tip cover 17 from shifting in the rotation direction.

The outer peripheral surface of the insertion portion 6 of the endoscope 2 near the connecting portion between the curved portion 9 and the distal end component main body 16 is provided at a position near the engaging portion 66 of the distal end cover 17. A hard grip portion 85 for attaching / detaching work is provided over the entire outer peripheral surface of the insertion portion 6. The handle 85 is formed of a material having electrical insulation, for example, a material such as synthetic resin or ceramics, and has a thickness of about 0.1 to 3 mm.

Further, a concave portion 86 for positioning is formed in the handle portion 85 at a position corresponding to the locking projection 67 of the fixing member 68. Here, at the rear end of the connecting portion 65 of the cover body 60 of the front end cover 17, a concave portion 86 of the handle portion 85 is provided.
Is formed with a convex portion 87 that is removably engaged with the projection.

The handle 85 is colored in a color different from that of the tip cover 17 so as to make it easy to distinguish the tip cover 17 from the tip cover 17. Further, a recessed step portion 88 is formed on the outer peripheral surface on the hand side of the handle portion 85. Here, the distal end portion of the curved covering member 89 covering the outer peripheral surface of the curved portion 9 is wound and fixed by the fixing thread 90 in a state of being in contact with the hand-side end surface of the handle portion 85, and is further fixed on the thread fixed portion. A fixing portion 91 to which an adhesive is applied is formed. The adhesive of the fixing portion 91 is applied to the recessed step portion 88 of the handle portion 85, and sufficient watertightness is secured.

In this embodiment, the locking projection 67 and the handle 85 are provided separately.
5 may be formed as a cylindrical integral part, or may be formed as an integral part with the lid 35 of the mounting opening 34 of the light guide fiber 26.

Next, the operation of the above configuration will be described.
First, a procedure for attaching the distal end cover 17 to the distal end component main body 16 will be described. At the time of attaching the distal end cover 17, the operator grips the hand grip 85 on the distal end side of the insertion section 6 of the endoscope 2 with one finger, and holds the distal end cover 1 with the other finger.
Have seven. In this state, the directions of the distal end component main body 16 and the distal end cover 17 are aligned, and the distal end cover 17 is fitted to the distal end component main body 16.

Subsequently, the opening 6 in the tip cover 17 is
4 and a thin portion 8 disposed beside the forceps raising table 22
2, the engaging projection 80 is fitted into the engaging hole 79 of the distal end component main body 16 and engaged.

Next, the engaging hole 62 of the distal end cover 17 is fitted and engaged with the distal end cover engaging projection 61 of the distal end component main body 16. Further, the convex portion 78 is fitted into the working hole 58 of the distal end component main body 16, and finally, the locking projection 36 of the lid 35 of the light guide fiber mounting opening 34, the locking member 39 of the screw hole 37, and the locking. Engagement hole 71 of tip cover 17 in projection 67
To complete the mounting.

On the other hand, when removing the distal end cover 17 from the distal end component main body 16, first, the locking projection 36 of the lid 35 of the opening 34 for mounting the light guide fiber through the locking hole 71,
The locking member 39 and the locking projection 67 of the screw hole 37 are pulled out.

Next, the opening 64 in the tip cover 17
Thin portion 82 arranged on the side of the forceps raising table 22 on the periphery of
, And the locking projection 80 is removed from the locking hole 79 of the distal end component main body 16. Further, the convex portion 78 is removed from the working hole 58 of the distal end component main body 16, and finally the distal end cover 17 is pulled out from the distal end component main body 16, so that the distal end cover locking projection 61 can be removed from the locking hole 62 of the distal end cover 17. Remove.

Therefore, the above configuration has the following effects. That is, for the attachment / detachment work of the distal end cover 17 on the outer peripheral surface near the connecting portion between the bending portion 9 and the distal end component main body 16 in the insertion portion 6 of the endoscope 2, at the position near the engaging portion 66 of the distal end cover 17. Since the hard handle 85 is disposed over the entire outer peripheral surface of the insertion section 6, when attaching and detaching the tip cover 17 to and from the tip component main body 16 for cleaning and disinfection after each case, The user can perform the operation with his / her fingers on the handhold 85. Therefore, the covering member 89 of the curved portion 9 disposed behind the distal end component 8
Also, there is no risk of damaging or damaging relatively soft parts such as the flexible tube portion 7 with the nails of the operator, making holes or the like, and damaging or deforming the end cover 17.

Further, the color of the handle portion 85 is changed to the tip cover 1.
7 or by changing the covering member 89 of the curved portion 9, it is possible to make it easier for the operator to visually recognize, and it is possible to make the boundary between the distal end cover 17 and the handle portion 85 easier to understand. Therefore, the work of attaching and detaching the tip cover 17 can be facilitated, and the workability can be improved.

Further, the cover body 60 of the tip cover 17
Since the insulating portion 72 mounted above the curved guide portion 59 of the distal end component main body 16 is integrally provided on the inner end side of the connecting portion 65 in the above, there is no possibility that the high frequency or the like will adversely affect the body wall.

Further, since the positioning recess 86 is formed at the position corresponding to the locking projection 67 of the fixing member 68 on the handle portion 85, the locking hole 71 of the tip cover 17 can be formed large, and the strength can be increased. Can be.

Further, the opening 6 in the tip cover 17
4 and a thin portion 8 disposed beside the forceps raising table 22
Since the buried portion 81a of the reinforcing member 81 is buried in 2, the tip cover 17 is not pinched between the forceps raising base 22 and the tip component main body 16 and can be used safely.

Further, the reinforcing member 81 is connected to the distal end component main body 16.
Therefore, the reinforcing member 81 does not protrude from the distal end cover 17 and is safe. Further, the reinforcing member 81
Is inserted into the front cover 17 so that the reinforcing member 81 does not fall off. Furthermore, since the fitting portion 81b of the reinforcing member 81 forms the locking portion, there is no possibility that the locking portion is torn off even when the tip cover 17 is repeatedly attached and detached.

Further, since the raising pin 40 is fixed to the side wall surface 23a in a supported state of the cantilever structure, the length of the sliding contact portion between the raising pin 40 and the forceps raising base 20 is set to the length of the raising pin 40. The forceps erecting base 20 can be made longer than in the case of a double-sided support structure, and there is no backlash of the forceps erecting base 20 and cannulation is easily performed.

Further, the raising pin 40 is connected to the main body 1
6 is set so that the outer diameter of the fixing portion 40b fitted and fixed in the fixing hole 41 is larger than the protruding portion 40a protruding outside the fixing hole 41. High strength such as strength.

Further, the curved guide portion 5 of the treatment tool at the forceps outlet is provided.
9 is provided integrally with the metal tip component main body 16 and the insulating part 72 is disposed on the upper part thereof.
It is possible to provide an inexpensive endoscope 2 that can prevent the scraping of the endoscope and has electrical insulation. Here, the insulating portion 72 is connected to the tip cover 1.
Since it is formed integrally with the cover body 60 of FIG. Further, the tip component main body 16 and the insulating portion 7
Since the displacement preventing means 77 is provided between the insulating member 72 and the second member 2, the insulating portion 72 does not shift due to insertion and removal of a treatment tool such as forceps.

Since the ring-shaped connecting portion 65 is provided all around the insertion end of the front cover 17 on the rear end side of the cover main body 60, the front end component main body 16 and the rear end of the cover main body 60 are provided. Strongly fixed with the insertion end on the side. Further, since the insertion end on the rear end side of the distal end cover 17 is provided on the distal end side from the bending portion 9, the distal end cover 17 which does not affect the bending operation can be provided.

The tip cover 17 and the tip component main body 1
The provision of the fixing portion with 6 prevents the tip cover 17 from falling off during the case, and enables a safe examination. Here, the fixing means is a cover 35 provided on the tip component main body 16 side.
And the projections such as the locking projection 36, the locking member 39, and the locking projection 67, and the hole 71 provided in the front cover 17,
Confirmation of the completion of the mounting of the tip cover 17 can be easily performed. Further, the locking projections 36, the locking members 39, and the locking projections 6 of the lid 35 on the distal end component main body 16 side are provided in the holes 71 of the distal end cover 17.
7 and the like are fitted into the projections and depressions.
Unevenness can be prevented from appearing on the outer surface side of the.

An arc-shaped fixing groove 69 is provided in a portion of the distal end component main body 16 where there is room for space, and a locking member 67 made of an insulating material embedded and fixed in that portion is provided.
, The outer diameter of the distal end component main body 16 does not need to be particularly large to form grooves, holes, and the like, and the diameter can be reduced.

The tip cover 17 and the tip component main body 1
The fixing means 6 is provided with at least two
The presence of the individual pieces prevents the tip cover 17 from peeling off. Further, since the fixing means for fixing the tip cover 17 and the tip component main body 16 is disposed at the end of the tip cover 17 having a relatively large space, a relatively large locking means is provided, and the fixing can be performed firmly. is there.

The tip cover 17 and the tip component main body 1
Since the fixing means 6 is disposed on the outer peripheral surface of the distal end component main body 16 on the imaging optical system 20 side, it is possible to prevent the field of view of the imaging optical system 20 from being disturbed by the displacement of the distal end cover 17. Furthermore, since the locking projection 39 is embedded and fixed in the screw hole 37 to form the fixing means, there is no need to perform any special processing for providing the locking projection 39, and the configuration can be made at low cost. The fixing means includes a locking projection 36, a locking member 39, and a locking projection 67 of the lid 35.
It can be strongly fixed by combining each fixing means such as.

Further, a plurality of continuous grooves 4 for disinfectant injection are provided in the sliding portion around the raising hole 42 into which the forceps raising pin 40 is inserted.
The provision of 4 makes it possible to disinfect the sliding portion between the raising hole 42 and the raising pin 40, which is sanitary. Here, since the plurality of continuous grooves 44 for injecting the disinfecting solution are provided around the raising hole 42, it is not necessary to further narrow the thin raising pin 40, and the strength of the raising pin 40 can be secured.

Also, since a plurality of semicircular grooves 52 for injecting the disinfecting liquid are formed on the outer peripheral surface of the connecting shaft 50 inserted into the connecting hole 49 of the forceps raising stand 22, the connecting hole 49 and the connecting shaft It is possible to disinfect the sliding portion between the sliding portion 50 and the sanitary portion. Here, since the semicircular groove 52 for injecting the disinfecting liquid is provided on the outer peripheral surface of the connecting shaft 50, the processing of the semicircular groove 52 becomes easy.

Further, since the inner diameter of the tip cover 17 is set at a ratio of 0.7 to 1 with respect to the outer diameter of the tip component main body 16, the tip cover 17 can be securely fixed to the tip component main body 16. Further, since the ring-shaped connecting portion 65 is provided all around the proximal end portion of the distal end cover 17 on the hand side, the distal end cover 17 that is hard to come off from the distal end component main body 16 can be provided.

The tip cover 17 is the weakest portion in the vicinity of the locking hole 71, and this portion is engaged last when attaching the tip cover 17, and first when removing the tip cover 17. By removing it, damage to the tip cover 17 can be prevented.

Further, by providing the handle portion 85 between the distal end cover 17 and the fixing portion 91, the assembling work in a state where the curved covering member 89 is abutted against the handle portion 85, that is, the fixing thread of the curved covering member 89 The fixing work by the fixing member 90 can be easily performed, and the adhesive of the fixing portion 91 does not flow into the joint surface between the front cover 17 and the front component main body 16 during the assembling operation, which may adversely affect the attaching and detaching work of the front cover 17. There is no.

FIGS. 6 to 8 show a second embodiment of the present invention. FIG. 6 shows the distal end of the insertion section 101 of the endoscope, and 102 is the main body of the distal end component.
As shown in FIG. 8, a forceps channel 103, an air / water supply channel 104, a guide channel 105 for a forceps raising wire, and the like are connected to the distal end component main body 102.

Further, an image pickup hole 107 for housing the image pickup device 106 is formed in the distal end component main body 102. Here, the imaging device 106 has a built-in optical lens 108 and a fitting portion 110 for matching the optical axis with the imaging optical lens 109 provided on the distal end component main body 102 side. There is provided a fixing portion 111 for screw application which is formed integrally with the portion 110.

The image pickup device 106 has an image pickup hole 107.
The fixing screw 114 is screwed into a screw hole 113 provided on the rear end side of a locking groove 112 described later
Is to be fixed by. Here, the screw hole 113 extends toward the center of the imaging device 106, and the fixing screw 114 screwed into the screw hole 113 abuts on the fixing portion 111 to fix the imaging device 106. Sometimes, the image pickup device 106 is
2 is prevented from rotating.

Further, the engaging projection 11 of the tip cover 115 made of an elastic material is provided on the tip of the tip component main body 102.
6 are provided. A rib 117 is protruded from the end of the front cover 115 all around.

The rib 117 is formed so as to fit into the locking groove 112 when the tip cover 115 is attached to the tip component main body 102. The width of the rib 117 is set at a ratio of about 0.7 to 1.3 with respect to the width of the locking groove 112.

FIG. 7A shows a part of the locking groove 112.
As shown in FIG. 11, the depth of the groove is shallower than the other portions.
8 are formed. When a part of the internal components of the distal end component main body 102, for example, the communication path 119 communicating with the guide channel 105 of the forceps raising wire interferes with the locking groove 112 due to the layout of the internal components of the distal end component main body 102. A built-in component such as a communication path 119 that interferes with the locking groove 112 is disposed in the shallow groove portion 118 of the locking groove 112.

The rib 117 of the tip cover 115 also has a recessed recess 120 at a position corresponding to the shallow groove 118 of the locking groove 112. Thereby, the front cover 11 can be formed without increasing the outer diameter of the front component main body 102.
5, a locking groove 112 as locking means is provided all around.
The front cover 115 can be firmly locked.

Further, a curved tube fixing portion 121 having a part extended therefrom protrudes from a rear end portion on the hand side of the distal end component main body 102. This curved tube fixing part 121 has a screw hole 12
4 are formed. Then, the bending tube 123 of the bending portion 122 disposed behind the distal end component main body 102 in the insertion portion 101 is screwed and fixed to the bending tube fixing portion 121 by a fixing screw 125 screwed into the screw hole 124. I have.

At the rear end side of the locking groove 112 in the distal end component main body 102, a hard handle 126 for attaching and detaching the distal end cover 115 is provided as shown in FIG. It is arranged around the circumference. here,
Tip cover 11 on outer peripheral surface of tip component main body 102
The contact surface 5 is formed with a positioning step 127 having a large-diameter portion on the front end side and a small-diameter portion on the rear end side. Then, the handle 126 is connected to the tip component main body 10.
The handhold portion 126 is positioned by the large-diameter portion on the distal end side of the step portion 127 when fitted and fixed to the outer peripheral surface of the distal end component main body 102 from the rear end side of the second. In addition,
The screw hole 113 is provided below the handle 126.

Further, an adhesive 128 is applied to the boundary between the distal end side of the handle 126 and the distal end component main body 102 to prevent infiltration of dirt between the handle 126 and the distal end component main body 102. As well as ensuring watertightness.

A distal end of a covering member 129 made of an elastic material for covering the outer peripheral surface of the curved portion 122 is fixed to the outer peripheral surface of the rear end of the distal end component main body 102. In this case, the tip of the covering member 129 is abutted against the rear end of the handle 126, for example, with an outer diameter of 0.1 to 0.1 mm.
A line 130 such as 5 mm cotton or fishing line is tightly tied, and an adhesive 131 is applied thereon to be firmly fixed.

When the distal end portion of the covering member 129 is wound around the outer peripheral surface of the distal end component main body 102 with the thread 130 and fixed, the handle portion 126 is bent by the elasticity (repulsive force) of the covering member 129 of the curved portion 122. Dropping to the side is prevented by the step 127 on the outer peripheral surface of the distal end component main body 102. Further, since the covering member 129 of the curved portion 122 is fixed on the outer peripheral surface of the distal end portion main body 102, watertightness can be reliably ensured.

A substantially flat notch 132 is formed on one side of the outer peripheral surface on the distal end side of the distal end component main body 102. An optical system mounting portion 135 to which the illumination optical system 133 and the imaging optical system 134 are mounted is provided in the notch 132.
And a mounting hole 137 of the forceps raising base 136 shown in FIG. 7B is formed. in this case,
The optical system mounting section 135 includes an illumination lens 138 of the illumination optical system 133 and an imaging optical lens 109 of the imaging optical system 134.
Are arranged side by side along the axial direction of the insertion portion 101. The mounting hole 137 of the forceps raising base 136 is connected to the illumination lens 1.
38 and the imaging optical lens 109.

The cover body 13 of the tip cover 115
9 has an opening 14 at a portion corresponding to the optical system mounting portion 135 and the forceps raising base mounting hole 137 of the distal end component main body 102.
0 is formed. Then, the illumination lens 138, the imaging optical lens 109, and the forceps raising base mounting hole 137 of the optical system mounting unit 135 are exposed to the outside through the opening 140.

Further, as shown in FIG. 7B, the forceps raising base 136 on the periphery of the opening 140 in the distal end cover 115.
The thickness T2 is 1.2 to
A thick part 141 about three times thicker is provided. For this reason, the thick portion 141 on the side of the forceps raising base 136 at the periphery of the opening 140 in the distal end cover 115 may move carelessly during a case, or the forceps raising base 136 and the tip component main body 10 may be moved.
2 is prevented.

As shown in FIG. 7B, the forceps raising base 136 has one of its base ends in one of the forceps raising base mounting holes 137 (on the optical system mounting part 135 side) in the distal end component main body 102.
Is rotatably supported by a side wall surface 137a via a raising pin 142.

The elevating pin 142 is used to
2 and is fitted and fixed in an elevating pin mounting hole 143 provided in the base 2. In this case, the mounting groove 145 of the light guide fiber 144 is provided in the optical system mounting portion 135 in the distal end component main body 102.
Are formed. A raising pin mounting hole 143 is formed so as to penetrate between the mounting groove 145 and the forceps raising base mounting hole 137.

Further, the raising pin mounting hole 143 is formed so that the side of the light guide fiber mounting groove 145 is thick and the side of the forceps raising base mounting hole 137 is narrow. The raising pin 142 is provided in the light guide fiber mounting groove 14.
It is inserted into the raising pin mounting hole 143 from the fifth side and fixed with solder, adhesive or the like. Thus, the raising pin 142 does not fall out of the distal end component main body 102. At the tip of the raising pin 142, a retaining portion 146 is provided similarly to the first embodiment so that the forceps raising base 136 does not easily come off.

[0108] The distal end of the forceps raising base 136 has a circular connection hole 1 to which the distal end of the raising operation wire 147 is connected.
48 are formed. A connection shaft 149 fixed to the distal end of the raising operation wire 147 is slidably connected to the connection hole 148.

Next, the operation of the above configuration will be described.
When the tip cover 115 is attached to the tip component main body 102, the tip cover 115 is fitted to the tip component main body 102. Subsequently, the distal end portion of the distal end portion main body 102 and the distal end portion of the distal end cover 115 are locked by locking means such as the locking projection 116 at the distal end of the distal end portion main body 102.
The mounting is completed by fitting the rib 117 of the distal end cover 115 into the locking groove 112 of No. 02.

Therefore, the above configuration has the following effects. That is, the distal end cover 115 is attached to the distal end component main body 102 by providing the engaging groove 112 in the distal end component main body 102 and fitting the rib 117 of the distal end cover 115 into the engaging groove 112. In addition, there is no need to provide a locking member such as a locking projection formed of an insulating material or the like on the distal end component main body 102, and the structure is inexpensive. In addition, the outer surface of the distal end cover 115 has no irregularities, so that it is possible to make it difficult to damage body tissues when the endoscope is inserted into a body cavity.

Further, a thick portion 141 whose thickness T2 is 1.2 to 3 times thicker than the thickness T1 of the other portion is disposed on the side of the forceps raising base 136 around the opening 140 in the front end cover 115. Therefore, the peripheral portion of the opening 140 in the distal end cover 115 is sandwiched between the forceps raising base 136 and the distal end component main body 102 during the case, which may cause a malfunction of the forceps raising base 136, There is no possibility that the peripheral portion of the opening 140 is damaged such as being cut off. Further, since it is not necessary to provide the reinforcing member 81 as in the first embodiment in the front end cover 115, it can be manufactured at low cost.

Further, a shallow groove portion 118 having a shallower groove depth than another portion is formed in a part of the locking groove 112, and the internal structure of the distal end component main body 102 depends on the layout of the internal component of the distal end component main body 102. , For example, the communication passage 119 communicating with the guide channel 105 of the forceps raising wire is formed in the locking groove 1.
12 and the shallow groove 11 of the locking groove 112
Since the internal components such as the communication passage 119 that interferes with the locking groove 112 are arranged at the portion 8, it is not necessary to increase the outer diameter of the distal end component main body 102, and the diameter can be reduced.

FIG. 9 shows a third embodiment of the present invention. This is because the distal end component main body 152 disposed at the distal end of the insertion section 151 of the endoscope and the distal end cover 153 made of an elastic material that covers the outer peripheral surface of the distal end component main body 152 are locked. The structure of the section is a combination of the first embodiment and the second embodiment.

That is, in the present embodiment, the tip component main body 1
A plurality of locking projections 154 formed of an insulating material protrude from the outer peripheral surface of the rear end of the projection 52, and a locking groove 155 is formed all around the rear end side. Here, an insulating coating 156 is applied to the vicinity of the locking projection 154, and the periphery of the surface of the locking projection 154 is insulated from the distal end component main body 152.

A rib 157 is provided on the inner peripheral surface of the distal end portion of the distal end cover 153 at a position corresponding to the locking groove 155 of the distal end component main body 152.
4 is provided with a locking hole 158.

A hard handle 159 for attaching and detaching the tip cover 153 is provided on the rear end side of the locking groove 155 in the tip component main body 152 over the entire outer peripheral surface of the tip component main body 152. ing. The handle portion 159 is formed by applying insulation coating to the distal end component main body 152.

Further, the outer diameter C of the tip component main body 152
The relationship between the outer diameter D of the locking groove 155 and the inner diameter E of the rib 157 is suitably C> E, E / D = 0.5-1.

Further, the outer diameter C of the distal end component main body 152,
The relationship with the inner diameter F of the tip cover 153 is set to F / C = 1 to 1.2. This can prevent the tip cover 153 from easily falling off the tip component main body 152. Reference numeral 160 denotes a covering member formed of an elastic material for covering the outer peripheral surface of the curved portion connected to the distal end component main body 152 of the insertion section 151 of the endoscope, and 161 denotes a distal end component main body 1
A fixing portion of the covering member 160 fixed on the outer peripheral surface of the cover 52.

Thus, the above configuration has the following effects. That is, since the tip component main body 152 is coated with an insulating material to form a hard handle 159 for attaching and detaching the tip cover 153, a separate handle 159 made of an insulating material is attached to the tip component main body 152. There is no need to fix it, which is effective in reducing the diameter and cost.

Further, the structure of the engaging portion between the outer peripheral surface of the distal end component main body 152 and the distal end cover 153 is configured by combining the first embodiment and the second embodiment. Can be more firmly fixed to the distal end component main body 152, and can be prevented from falling off in the case.

Further, the outer diameter C of the tip component main body 152
And the relationship between the inner diameter F of the tip cover 153 and F / C = 1 to
Since it is set to 1.2, the detachability of the tip cover 153 with respect to the tip component main body 152 can be improved.
Since the inner diameter E of the rib 157 is smaller than the outer diameter C of the distal component main body 152, the distal cover 153 does not fall off the distal component main body 152.

FIG. 10 shows a fourth embodiment of the present invention. This is because the locking groove 15 formed all around the rear end outer peripheral surface of the front end component main body 152 of the third embodiment.
5, a wide groove 171 is formed by enlarging the width of the groove.
2 is projected.

In this case, a wide rib 173 protrudes from the inner peripheral surface of the distal end portion of the distal end cover 153 at a position corresponding to the wide groove 171 of the distal end component main body 152. An engagement hole 174 is provided at a position corresponding to the engagement protrusion 172 of 152.

A hard handle 159 for attaching / detaching the tip cover 153 is provided on the rear end side of the locking groove 171 in the tip component main body 152 with an insulating coating over the entire outer peripheral surface of the tip component main body 152. It is formed by applying.

Therefore, the above configuration has the following effects. That is, since the tip component main body 152 is coated with an insulating material to form a hard handle 159 for attaching and detaching the tip cover 153, a separate handle 159 made of an insulating material is attached to the tip component main body 152. There is no need to fix it, which is effective in reducing the diameter and cost.

A wide rib 173 protrudes from the inner peripheral surface of the distal end portion of the distal end cover 153 at a position corresponding to the wide groove 171 of the distal end component main body 152, and the locking projection of the distal end component main body 152 at the rib 173. Since the locking hole 174 is provided at a position corresponding to 172, the rib 1
It is possible to increase the thickness of the fixing portion between the base member 73 and the wide groove 171 of the tip component main body 152. Therefore, the strength of the fixing portion between the tip cover 153 and the tip component main body 152 increases, and there is no possibility that the fixing portion between the tip cover 153 and the tip component main body 152 may be damaged and cut off during the case. In addition, the tip cover 153 can be prevented from falling off.

Further, the wide groove 1 of the tip component main body 152
The locking projection 172 of the tip cover 153 is provided at the approximate center of
And the locking projection 1 is provided on the rib 173 of the tip cover 153.
Since the locking hole 174 that engages with the 72 is provided, the outer diameter of the distal end cover 153 can be reduced.

FIG. 11 shows a fifth embodiment of the present invention. Here, an elastic member formed to have a length covering the distal end component main body 182 disposed at the distal end of the insertion portion 181 of the endoscope and the curved portion 183 connected to the rear of the distal end component main body 182. A tip cover 184 made of a material is provided.

Further, a locking groove is provided around the connecting portion between the rear end portion of the curved portion 183 and the front end portion of the flexible flexible tube portion 185 connected behind the curved portion 183. 186 are formed. In addition, the tip component main body 18
A plurality of locking projections 187 formed of an insulating material protrude from the outer peripheral surface of the rear end portion of the unit 2.

Further, on the inner peripheral surface of the insertion end of the distal end cover 153, the locking groove 186 is located at a position corresponding to the locking groove 186.
A rib 188 is provided so as to engage with and be detachable from the main body. Further, a locking hole 189 is provided on the distal end side of the distal end cover 153 at a position corresponding to the locking projection 187 of the distal end component main body 182 to engage with the locking projection 187 in a detachable manner.

Further, at the rear end side of the locking groove 186 at the connecting portion between the rear end portion of the curved portion 183 and the front end portion of the flexible tube portion 185, a handle 190 for attaching and detaching the front end cover 184 is possible. The distal end portion of the flexible tube portion 185 is provided over the entire outer peripheral surface.
The handle portion 190 is changed to a color different from that of the portion other than the distal end portion of the flexible tube portion 185 by applying a paint to the outer peripheral surface of the distal end portion of the flexible tube portion 185 or applying tape. is there.

The elastic material of the tip cover 184 is made of fluorine rubber, silicon rubber, EPT or the like. Further, the thickness of the portion of the distal end cover 184 covering the distal end component main body 182 is relatively thick at about 0.7 to 3 mm, and the thickness of the portion of the curved portion 183 covering the covering member 191 is 0.1 to 0. It is formed to be as thin as about 0.5 mm.
Of the coating member 191 around the cover member 191 and the bending portion 1
It is configured not to adversely affect the bending operation of 82. Further, the inner diameter of the distal end cover 184 is formed at a ratio of 0.6 to 1.3 with respect to the outer diameter of the covering portion such as the distal end component main body 182.

Therefore, the above configuration has the following effects. That is, the distal end cover 184 is
Is provided so as to cover up to the covering member 191, so that water leakage due to damage to the covering member 191 of the curved portion 182 is prevented,
The expensive imaging device can be protected, and repair and replacement of the covering member 191 of the bending portion 182 are not required.

Further, the handle portion is changed to a color different from that of the portion other than the distal end portion of the flexible tube portion 185 by applying a paint or a tape to the outer peripheral surface of the distal end portion of the flexible tube portion 185. Since the flexible tube portion 185 is provided, the flexible tube portion 185 and the handle portion 190 can be easily distinguished.
The workability of the attachment / detachment work of 84 can be improved. Also,
There are few irregularities on the outer periphery of the flexible tube portion 185, and there is little influence on the insertability of the endoscope.

It should be noted that the present invention is not limited to the above-described embodiments, and it goes without saying that various modifications can be made without departing from the spirit of the present invention.

Next, other characteristic technical matters of the present application will be additionally described as follows.

(Appendix 1) A distal end cover provided with a locking portion, a distal end cover detachably provided at the distal end of the endoscope insertion portion and capable of locking to the locking portion, An endoscope comprising a grip portion provided near the locking portion.

(Additional Item 2) The endoscope according to Additional Item 1, wherein the grip portion is provided with an insulating means insulated from at least a metal constituting a distal end portion of the endoscope insertion portion.

(Purpose of Supplementary Item 2) The attachment and detachment of the elastic distal end cover can be performed safely without damaging the endoscope, particularly, the covering member of the curved portion, and the body wall of the subject due to leakage current from the grip portion and the like. It is an object of the present invention to provide an endoscope that can prevent damage to the endoscope.

(Additional Item 3) The endoscope according to Additional Item 2, wherein the insulating means is provided by an insulating member.

(Purpose of Supplementary Item 3) An object of the present invention is to provide an endoscope provided with a grip portion which is inexpensive and easy to assemble.

(Additional Item 4) The endoscope according to Additional Item 1, wherein the distal end cover is made of an elastic member.

(Purpose of Supplementary Item 4) It is an object of the present invention to provide an endoscope with a detachable tip cover that can be easily attached and detached and does not play or slip when it is attached.

(Supplementary Note 5) A cover portion that is rotatably mounted on the distal end component portion and covers at least a part of the forceps raising base that moves up and down as the forceps raising wire retreats, or at least a part of the forceps raising wire. An endoscope comprising: a detachable distal end cover made of an elastic body having a rigid reinforcing member provided at least in the cover portion.

(Conventional Examples of Supplementary Items 5, 6, and 7) As shown in Japanese Utility Model Laid-Open Publication No. Sho 51-103891, the elastic type cover does not have a forceps raising base and does not need to provide reinforcing means. . On the other hand, a detachable distal end cover-type side-view endoscope having a forceps raising device has a distal end cover provided with a relatively hard member as shown in Japanese Patent Publication No. 2-54534 and requires a reinforcing member. There is no disclosure and there are no disclosure examples.

In the above-mentioned conventional configuration, there is a portion where a wall surface for holding the cover is not provided in the elastic end cover type side-view endoscope having the forceps raising base. In particular, when the cover is pressed by the body wall or the like and deformed when the cover is pressed by the body wall, a part of the cover is caught between the tip component and the forceps raising table, Malfunction or cover damage.

(Purpose of Supplementary Item 5) In the case, the elastic distal end cover is sandwiched between the forceps raising base and the distal end component to prevent malfunction of the forceps raising base and prevent the elastic distal end cover from being damaged. It is to provide an endoscope which can do it.

(Operation of Supplementary Items 5 and 7) The strength of the distal end cover is increased by the reinforcing member provided on the distal end cover provided with the elastic member, and the cover is not carelessly deformed.

(Additional Item 6) The endoscope according to Additional Item 5, wherein the reinforcing member is insert-molded on the distal end cover.

(Purpose of Supplementary Items 6 and 7) An endoscope capable of securely locking the elastic distal end cover to the distal end component and preventing the reinforcing member from jumping out of the elastic distal end cover during a case. To provide.

(Additional Item 7) The distal end component has a first locking portion, and the reinforcing member has a second locking portion lockable to the first locking portion. 6. The endoscope according to claim 5, wherein

(Additional Item 8) The endoscope according to Additional Item 5, wherein the first and second locking portions are a convex portion, a concave portion, or a hole.

(Additional Item 9) A locking concave portion or a locking convex portion provided substantially in the radial direction on the distal end component portion, and a locking convex portion or a locking concave portion at a position corresponding to the locking concave portion or the locking convex portion. Alternatively, the distal end cover is formed by fitting the locking concave portion or the convex portion of the distal end component and the locking convex portion or the concave portion or the locking hole of the distal end cover. An endoscope, wherein the endoscope is locked in a circumferential direction and an axial direction with respect to a portion.

(Conventional Examples of Supplementary Items 9, 10 and 11) The locking means in the insertion portion cover is, for example, the one described in Japanese Utility Model Application Laid-Open No. 61-203.
No. 716, it was provided near the boundary between the insertion section and the operation section. In the case where the distal end portion is provided by a hard member, for example, as shown in Japanese Patent Application Laid-Open No. 4-314439, the locking means at the distal end portion is indicated by a groove and a projection at the cover end portion. There is no disclosure example in the side-viewing endoscope.

In the above-mentioned conventional configuration, Japanese Patent Laid-Open No.
When the locking means of the distal end cover provided by a hard member as disclosed in Japanese Patent No. 314439 is applied to the elastic distal cover attaching / detaching method, the locking force of the locking portion is weak and easily falls off.
Therefore, the means for locking the elastic end cover had to be provided.

(Purpose of Supplementary Item 9) Provided is an endoscope that can securely increase the safety by securely locking the elastic distal end cover to the distal end component and preventing the distal end cover from shifting or falling off in a case. It is in.

(Supplementary Note 10) The distal end portion includes a distal end portion having a retaining convex portion at the distal end portion, and a distal end cover having a retaining concave portion or a retaining hole at a position corresponding to the retaining convex portion. An endoscope, wherein the distal end component and the distal end cover are locked by fitting the locking concave portion or the locking hole.

(Purpose of Supplementary Item 10) An endoscope which prevents displacement of the distal end portion and the distal end portion of the elastic distal end cover, ensures the visual field, and can effectively use the dead space is provided. It is in.

(Additional Item 11) An additional item 9 wherein a plurality of locking portions each comprising a locking convex portion and a locking concave portion or a locking hole formed on the distal end constituting portion and the distal end cover are provided. An endoscope according to additional item 10.

(Purpose of Supplementary Item 11) An endoscope capable of preventing displacement of the elastic distal end cover in the rotation direction, ensuring a visual field, and preventing the side surface of the distal end component from being exposed during a case. Is to provide.

(Additional Item 12) The endoscope according to Additional Item 9 or Item 10, wherein the locking concave portion or the locking hole has an interference with the locking convex portion.

(Supplementary Item 13) In the forceps raising table rotatably mounted on the distal end component and the treatment tool bending guide section located near the operation section side of the forceps raising table, the treatment tool bending guide section is An endoscope comprising: a first guide portion integrally formed with a distal end portion; and a second guide portion insulated from the first guide portion and the distal end portion.

(Conventional Example of Supplementary Item 13) Conventionally, the bending guide portion has fixed the anti-scraping means provided separately.

In the above-mentioned conventional structure, expensive materials such as ceramics had to be used for the material which also served as the insulating means and the chipping prevention.

(Purpose of Supplementary Item 13) Provided is an endoscope provided with means for inexpensively preventing a contact portion with a treatment tool from being scraped when the treatment tool is inserted and removed with the forceps raising table raised. Is to do.

(Function of Supplementary Item 13) By guiding the bending of the forceps by the guide portion provided integrally with the distal end portion, scraping can be prevented and the cost can be reduced.

(Additional Item 14) Fixed to the distal end component,
An endoscope in which a forceps raising stand is rotatably mounted, wherein the raising stand axis has means for preventing the forceps raising stand from falling off.

(Conventional Example of Supplementary Item 14) As shown in Japanese Utility Model Application Laid-Open No. 63-93901, a conventional raising table shaft has a double-supported structure with respect to the distal end component. The fitting portion of the elevator was formed very short.

In the above-mentioned conventional structure, the fitting portion between the forceps raising base and the forceps shaft is very short, so that the forceps raising base rattles, and it is difficult to perform fine adjustment during cannulation.

(Purpose of Supplementary Item 14) It is an object of the present invention to provide an endoscope which can prevent play when the forceps raising base is rotated and can prevent the forceps raising base from falling off.

(Function of Supplementary Item 14) By forming the forceps raising base shaft to have a cantilever structure, a long fitting portion can be obtained, and play can be prevented when the forceps raising base is operated.

(Additional Item 15) A hole for rotatably fitting a first shaft provided at the distal end of the operation wire connected to the hand operation portion and a second shaft provided at the distal end portion. In a forceps raising device comprising a forceps raising table having 1 and a hole 2,
Fitting portion 1 of the first shaft and hole 1 or second shaft and hole 2
An endoscope characterized in that at least one of the fitting portion 1 and the fitting portion 2 of the fitting portions 2 is constituted by two or more contact portions.

(Conventional Example of Additional Item 15) As shown in Japanese Patent Application Laid-Open No. 4-314439, there is no gap between the fitting portion between the rotating shaft and the elevator.

In the above-mentioned conventional structure, the disinfecting solution could not be brought into contact, and when bacteria entered the fitting portion, disinfection could not be performed.

(Purpose of Supplementary Item 15) An object of the present invention is to provide an endoscope capable of improving disinfecting around an axis.

(Function of Supplementary Item 15) By providing a gap between the shaft of the forceps raising stand and the fitting hole, the fitting surface can be filled with the disinfecting liquid.

(Additional Item 16) A tip cover detachably provided to the tip component, a tip component having a covering portion covered with the tip cover, and an imaging optical unit provided in the tip component At the distal end of the endoscope insertion section including a set mounting hole and an imaging optical section set detachably fitted in the nuclear imaging optical section set mounting hole, the imaging optical section set is held in the imaging optical section set mounting hole. An endoscope, wherein a holding unit is provided on the operation unit side with respect to the covering unit.

(Conventional Example of Supplementary Item 16) There is no specific disclosure of the fixing means of the image pickup device in the side-viewing endoscope with detachable tip cover, and it is generally located in the fitting hole of the tip component. I was

In the above-mentioned conventional configuration, in the case of cleaning and disinfecting with the distal end cover removed, fine moisture may enter through the screw holes serving as fixing means, which may adversely affect the imaging apparatus.

(Purpose of Supplementary Item 16) Without displacing the optical axes of the imaging optical system on the distal end component side and the optical system of the imaging device,
In addition, an object of the present invention is to provide an endoscope that can protect an imaging device by ensuring watertightness.

(Operation of Supplementary Item 16) By providing the means for fixing to the distal end component of the imaging apparatus closer to the hand than the elastic distal end cover mounting part, reliable watertightness can be ensured.

[0182]

According to the present invention, the handle portion is provided in the vicinity of the locking portion on the insertion portion side. , Or a relatively soft component such as a flexible tube portion or a covering member of a curved portion disposed behind the distal end portion,
There is no risk of damaging the tip cover or damaging or deforming the tip cover, and the work of attaching and detaching the tip cover is easy, and the fitting part between the tip component body and the tip cover is loose. Can be prevented.

[Brief description of the drawings]

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

FIG. 2 is a schematic configuration diagram of the entire electronic endoscope apparatus.

FIG. 3 is a longitudinal sectional view showing an attached state of a forceps raising stand of the endoscope.

4A is a sectional view taken along line L1-L1 of FIG. 1, and FIG.
3 is a sectional view taken along line L2-L2 in FIG.

FIG. 5A is a perspective view showing a state in which a distal end cover is removed from a distal end portion of the endoscope, and FIG. 5B is a perspective view showing a state in which a fixing member and a conduit pipe are removed from the distal end portion. (C) is a perspective view showing a locking hole of the tip cover,
(D) is a perspective view showing a locking projection of the distal end component.

FIG. 6 is a longitudinal sectional view showing a configuration of a main part of an endoscope according to a second embodiment of the present invention.

7A is a sectional view taken along line L1-L1 of FIG. 6, and FIG.
7 is a sectional view taken along line L2-L2 in FIG.

FIG. 8 is an exploded perspective view of a distal end portion of an insertion section of the endoscope.

FIG. 9 is a perspective view of a main part showing a third embodiment of the present invention.

FIG. 10 is a perspective view of a main part showing a fourth embodiment of the present invention.

FIG. 11 is a perspective view of a main part showing a fifth embodiment of the present invention.

[Explanation of symbols]

6, 101, 151, 181 insertion portion, 8 tip configuration portion, 16, 102, 152, 182 tip configuration body,
17, 115, 153, 184: tip cover, 66: locking portion, 88, 126, 159, 190: hand-held portion.

Claims (5)

[Claims] An endoscope insertion portion provided with a locking portion; a distal end cover detachably provided at the endoscope insertion portion and capable of locking to the locking portion; and the locking portion. An endoscope comprising a grip portion provided in the vicinity. 2. The endoscope according to claim 1, wherein the grip portion is provided with an insulating means insulated from at least a metal constituting a distal end of the endoscope insertion portion. 3. The endoscope according to claim 2, wherein said insulating means is provided by an insulating member. 4. The endoscope according to claim 1, wherein the distal end cover is made of an elastic member. 5. A distal end of an endoscope insertion portion provided with a locking portion, a distal end cover removably provided on the distal end of the endoscope insertion portion and lockable to the locking portion, and the locking portion. An endoscope comprising a grip portion provided in the vicinity, wherein an insulating means is disposed between the grip portion and a metal constituting a distal end of the endoscope insertion portion.