JPH08243076A - Endoscope - Google Patents

Abstract

PURPOSE: To provide an endoscope with a raising bed, a raising shaft and wire fixing member, on which fouling is hard to be accumulated, to be easily cleaned, by forming a notch on an operative instrument raising bed so as to expose both or either of a wire fixing member and/or a raising shaft. CONSTITUTION: An operative instrument raising bed 26 to guide an operative instruments to an affected part is mounted in the front side of an operative instrument channel. This is rotatably held around a raising shaft 35, and the tip of a raising wire 27 is fixed on the tip side of the operative instrument raising bed 26 by a wire fixing member 48. The raising bed 26 has a slope like a slide, a lateral hole 60 to be inserted by a raising shaft 35 is constructed on the rear end side F, and fitting holes 61 and 62 are used for engaging a wire fixing member 48 to fix the raising wire 27. In adjacency of holes 60, 61 and 62 used for engaging the raising shaft 35 and the wire fixing member 48 by fitting, a notch 63 which the central part is cut off to remain both sides is constructed.

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 treatment instrument raising base for controlling the protruding direction of the treatment instrument inserted in a treatment instrument insertion passage on the distal end side.

[0002]

2. Description of the Related Art As is well known, medical endoscopes such as gastroscopes and duodenal scopes are used for observing and treating an affected part by inserting the insertion part into the body cavity of the patient. A mechanism for directing a forceps to a desired affected part when a biopsy tissue is collected or treated using the forceps while observing the affected part is a treatment tool raising device. Basically, a treatment instrument raising device is disclosed in Japanese Patent Laid-Open No. 6-14
As disclosed in 873, it comprises a treatment tool raising base rotatably provided around the raising shaft at the distal end portion of the insertion portion, and a raising operation wire (also referred to as raising wire) connected to the treatment instrument raising base. The direction of the forceps is determined by adjusting the angle of the treatment tool raising base by moving the raising operation wire forward and backward with the hand operation portion.

When the endoscope is used, a wire fixing member connected to the fitting shaft of the raising shaft of the treatment instrument raising base and the tip forming portion and the end portion of the raising operation wire is connected to the treatment instrument raising base. The liquid in the body cavity enters the fitting part. Therefore, it is necessary to wash after use. In particular, cleaning the wire fixing member and the raising shaft is very troublesome.

[0004]

As described in the prior art, since the raising base and the raising shaft and the raising base and the wire fixing member are fitted to each other, dirt is likely to be accumulated on the fitted portion for cleaning. It took a lot of work.

The present invention has been made in view of the above points, and an object of the present invention is to provide an endoscope having a raising base, a raising shaft, and a wire fixing member in which dirt does not easily accumulate and cleaning is troublesome. And

[0006]

Means and Actions for Solving the Problems A tip forming section body disposed at a tip of an insertion section, a tip cover detachable from the tip forming section body, and an affected section formed in the insertion section. A treatment instrument insertion passage for guiding a treatment instrument for treatment to the distal end side opening portion of the insertion portion, and a wire for operating in a direction arranged in the vicinity of the opening portion of the treatment instrument insertion passage and projecting the treatment instrument. In an endoscope having a treatment instrument raising base that guides through the treatment instrument, a wire fixing member that attaches the distal end portion of the raising operation wire to the treatment instrument raising base, and the treatment instrument raising base is rotatably supported. By forming a notch in the treatment tool raising base so that both or one of the raising shafts is exposed, dirt accumulated between the raising base, the raising shaft, and the wire fixing member can be easily removed with a brush or the like. Clean the part that can be washed Omitting the trouble of cleaning.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below with reference to the drawings. 1 to 12 relate to a first embodiment of the present invention,
FIG. 1 shows the entire configuration of an endoscope apparatus including the first embodiment, and FIG. 2 shows a front view (A) of a distal end constituent portion of an insertion portion and a vertical sectional view (B) taken along the line AA. FIG. 3 shows B of FIG.
A cross-sectional view taken along line -B shows a cross-sectional structure of the tip forming portion, and FIG.
Shows a cross-sectional view of the rear end side of the distal end constituent portion, FIG. 5 shows a structure of the treatment instrument raising base in a perspective view from above (A) and a perspective view from below (B), and FIGS. Shows a cross-sectional structure in the vicinity of the treatment instrument raising base in the distal end configuration part, FIG. 8 shows a structure of the storage cover in a perspective view (A) and a cross-sectional view (B) in the C plane, and FIG. 9 shows an insertion part. Shows the storage cover that covers up to the base end,
FIG. 10 shows another configuration example of the two storage covers, and FIG.
Reference numeral 1 shows still another storage cover, and FIG. 12 shows a plan view of the tip component main body provided with an escape portion.

As shown in FIG. 1, an endoscope apparatus 1 having the first embodiment is an electronic endoscope 2 as an endoscope of the first embodiment.
And a light source device 3 for supplying illumination light to the electronic endoscope 2.
A video processor 4 for performing signal processing on an image pickup device built in the electronic endoscope 2, and a color monitor 5 for displaying a video signal output from the video processor 4.
An air supply device 6 and a water supply device 7 for supplying air and water for cleaning the observation window of the electronic endoscope 2, and a VTR deck 8 connected to the video processor 4 for recording and reproducing a video signal. , A video disk 9 which is a large-capacity recording device for recording video signals, and a video printer 10 for obtaining a hard copy of an endoscopic image displayed on the color monitor 5.
Have and.

The electronic endoscope 2 has an elongated insertion portion 11 having flexibility, a wide operation portion 12 formed at a rear end of the insertion portion 11, and a universal portion extended from the operation portion 12. The connector 14 having the cord 13 and provided at the end of the universal cord 13 can be detachably connected to the light source device 3.

The insertion portion 11 has a hard tip forming portion 15, a bendable bending portion 16 and a long flexible portion 17 which are sequentially formed from the tip end side, and a grip portion 18 provided on the operation portion 12 is formed. The bending portion 16 can be bent in the up-down direction, the left-right direction, or the like by gripping and operating the angle knob 19 to rotate. An engagement lever 20 for fixing the bending angle of the bending portion 16 is coaxially provided on the angle knob 19.

By connecting the connector 14 to the light source device 3, illumination light from a lamp (not shown) of the light source device 3 is supplied to a light guide fiber 42 (see FIG. 2) in the electronic endoscope 2, and this light guide is provided. The illumination light transmitted by the fiber 42 is emitted through the illumination lens 21 shown in FIG. 2 and the like of the distal end constituting section 15 and illuminates a subject such as a diseased part. The illuminated subject is imaged on its focal plane by an objective lens system 22 formed adjacent to the illumination lens 21,
Photoelectric conversion is performed by a solid-state image sensor such as a CCD arranged on the focal plane.

The solid-state image pickup device is connected to the video processor 4 via a signal cable in the electronic endoscope 2 and a scope cable 23 connected to the connector 14. The signal photoelectrically converted by the solid-state image pickup device is stored in the video processor 4. Signal processing circuit to convert the signal into a standard video signal and display the endoscopic image in color on the display screen of the color monitor 5.

A treatment instrument insertion port 2 for inserting a treatment instrument such as forceps near the base end of the insertion portion 11 or the front end of the grip portion 18.
4A is provided. The treatment instrument insertion port 24A communicates with a treatment instrument channel 24 (see FIG. 3) that serves as a treatment instrument insertion passage, and the distal end opening of the treatment instrument channel 24 is a treatment instrument channel opening 25 provided in the distal end forming portion 15. (Fig. 1,
(See FIG. 3).

Therefore, by inserting a treatment tool such as forceps through the treatment tool insertion opening 24A, the treatment tool channel 24 is obtained.
The treatment tool can be guided by and the distal end side of the treatment tool guided from the channel opening 25 can be projected to perform treatment for medical treatment or the like.

Further, as shown in FIG. 3, a treatment instrument raising base 26 is housed in the distal end opening portion 25.
By performing an operation of rotating a treatment instrument raising lever 28 (provided on the operation portion 12) connected to the rear end side of the raising wire 27 via the raising wire 27 having the tip thereof connected to 6 , The raising wire 27 pushes and pulls (or pulls / relaxes)
As a result, the treatment instrument raising base 26 can be raised and inverted, and the protruding direction of the treatment instrument on the distal end side can be controlled. The treatment instrument insertion port 24A is closed by a treatment instrument plug 29 when the treatment instrument is not used.

In addition, the operation part 12 supplies air to the outer surface of the objective lens system 22 of the tip forming part 15 to supply air.
Water supply piston 30 and suction piston 31 for suction
Are provided. By operating the air / water feeding piston 30, air from the air feeding device 6 or washing water from the water feeding device 7 is jetted from the air / water feeding nozzle 32 (see FIG. 2) to the surface side of the opposing objective lens system 22, Objective lens system 22
It is possible to remove deposits that adhere to the surface of the and obstruct the observation.

Further, a switch 33 such as a freeze switch for controlling the video processor 4 to instruct the endoscope image to be a still image is provided on the top of the operation unit 12. A break-preventing portion 34 for preventing breakage is provided near the proximal end of the insertion portion 11 in front of the treatment instrument insertion opening 24A.

As shown in FIGS. 2 and 3, the tip forming portion 15 is formed.
Is composed of a tip forming section main body 36 and a tip cover 37 which is attachable to and detachable from the tip forming section main body 36. As shown in FIG. 2, the tip component body 36 is provided with the illumination lens 21, the objective lens system 22, the water for cleaning the surface of the objective lens system 22, and the air / water nozzle 32 for sending air. .

Further, in the body 36 of the tip forming portion, the illumination lens 21, the objective lens system 22, and the air / water feeding nozzle 32 shown in FIG. As shown, a treatment tool raising mechanism is provided. The treatment instrument raising base 26 or the like forming this treatment instrument raising mechanism is the tip opening portion 2.
It is stored in 5.

The tip cover 37, which is detachably attached to the tip component main body 36 from its tip side, is formed of an elastic member such as rubber, and as a preferred specific example, is formed of silicon rubber having a rubber hardness of 70 °. There is.

As shown in FIG. 3, on the front side of the treatment instrument channel 24, there is provided a treatment instrument raising base 26 for guiding the treatment instrument 77 (see FIG. 20) which has been inserted through the treatment instrument channel 24 to the affected part. Has been. The treatment instrument raising base 26 is rotatably held around a raising shaft 35, and the treatment instrument raising base 2 is provided.
The tip of the raising wire 27 is fixed to the tip side of 6 by a wire fixing member 48.

The raising wire 27 is inserted into the insertion portion 11
Operation unit 12 through a wire channel (not shown)
Is connected to a treatment instrument raising lever 28 provided on the operating instrument raising lever 28. By operating the treatment instrument raising lever 28, the raising wire 27 is pushed and pulled to raise the treatment instrument raising base 26.
5, the treatment tool raising base 26 can be raised from the state shown by the solid line in FIG. 3 as shown by the chain double-dashed line, or can be inverted from the raised state.

As shown in FIG. 4, locking pins 38 made of an insulating material such as polysulfone are provided at two positions on the rear end side of the tip forming portion main body 36, and each locking pin 38 has a tip cover 37. The distal end cover 37 is locked to the distal end component body 36 by being engaged with the corresponding locking holes 39 provided at two positions.

The locking pin 38 is provided at the vertical position of the rear end of the tip forming body 36. The upper locking pin 38 is higher than the lower locking pin 38 and has a larger diameter.
Outer surface 40 and inner surface 41 of tip cover 37 have different properties, and outer surface 40 has better slipperiness. The thickness of the tip cover 37 around the locking hole 39 is 1 mm, for example.
As shown in FIG. 2B, below the illumination lens 21, a light guide fiber 42 for transmitting the illumination light from the light source device 3 to the distal end side of the insertion portion 11 has a U-shaped cross section. 43 (see FIG. 3) is filled with an adhesive 44 and fixed.

As shown in FIG. 2B, the objective lens system 2
Reference numeral 2 denotes a first lens 22a that closes the observation window, a prism 22b arranged inside the first lens 22a, and an optical path is changed by the prism 22b in the axial direction of the insertion portion. Rear lens group 22c arranged
And an image is formed on a solid-state imaging device (not shown) in the solid-state imaging device 45 through these optical systems.

This solid-state image pickup device includes a signal cable (not shown) inserted in the insertion portion 11 and the connector 1 shown in FIG.
4 is connected to the video processor 4 via a scope cable 23 extended from the signal line 4, and the signal photoelectrically converted by the solid-state image sensor is processed by the video processor 4 to reproduce an image on the color monitor 5.

As shown in FIG. 2 (A), the air / water feeding nozzle hole 46 provided in the tip cover 37 is provided with the air / water feeding hole 46.
It is designed to be smaller than the opening 47 of the air / water nozzle so as to adjust the amount of air / water supplied from the water / water nozzle 32. Then, the tip cover 37 having different sizes of the air / water feeding nozzle holes 46 can be selected from several types and used so that the user can obtain a desired air / water feeding amount.

As shown in FIGS. 2B and 3, at the rear end of the main body 36 of the front end forming portion, the angle knob 1 of the operating portion 12 is
A bending portion 16 that is bent by the bending operation of 9 is formed, and the bending portion 16 is formed by rotatably connecting bending tubes 49 to each other. The outside of each bending tube 49 is a bending rubber that protects the bending tube 49. It is covered with 50.

The curved rubber 50 is engraved with the product number of the tip cover 37 applicable to the tip component body 36.
The curved rubber 50 is wound around the ring 51 made of an insulating member such as polysulfone attached to the body 36 of the tip end portion so that the tip end surface is closely adhered to the thread wound adhesive 52 (that is, after the thread is tightly wound, an adhesive is applied to prevent the thread from fraying). Attached) is fixed. The ring 51 has the same black color as the tip cover 37.

The tip cover 37 is a treatment instrument 77 or the like used.
Several types are prepared so that the electronic endoscope 2 can be used properly according to its use and function. For example, when using a tube having a high rigidity such as a pancreaticocholangiography tube, the treatment instrument 7
When 7 is tilted toward the tip cover 37 side made of silicon rubber, the rubber cannot support the treatment instrument and the tip of the treatment instrument 77 is swayed, making it difficult for the operator to guide the treatment instrument to the affected area. .

In the above situation, as shown in FIG. 3, the electronic endoscope 2 is used with the distal end cover 37 attached with the thickened wall thickness 55 of the distal end cover 37 on the side of the treatment instrument raising base 26.
Further, as shown in FIG. 3, a treatment instrument channel pipe 56 and a rising wire pipe 57 are fixed to the tip constitution body 36 with an adhesive 44.

An external view of the raising table 26 is shown in FIG.
FIG. 7 shows a cross-sectional view around the treatment instrument raising base 26 of the distal end forming portion 15. As shown in FIG. 5, the raising base 26 has a slope portion like a slide, and a lateral hole 60 through which the raising shaft 35 is passed is provided on the rear end side of the raising base 26. The fitting holes 61 and 62 are used for locking the wire fixing member 48 that fixes the raising wire 27. The wire fixing member 48 has a substantially cylindrical shape, and the center hole is used for fixing the raising wire 27.

The fitting holes 61 and 62 of the wire fixing member 48 of the raising base 26 are different in size from side to side. 6 and 7
As shown in FIG.
An abutting step 54 that functions as a stopper is provided.

Further, as shown in FIGS. 5 to 7, in the vicinity of the holes 60, 61 and 62 used for locking the rising shaft 35 and the wire fixing member 48 by fitting, the central portion is left on both sides. A cutout 63 is provided at the bottom. In other words, when the raising shaft 35 and the wire fixing member 48 are fitted, a notch 63 is provided which is notched in the radial direction in the vicinity of the center of the fitting portion.
3 is configured so that most of the side surfaces of the raising shaft 35 and the wire fixing member 48 are exposed (except for the vicinity of both ends), so that cleaning or disinfection can be performed more easily.

The wire fixing member 48 and the raising shaft 35 are provided with small-diameter portions 58a and 58b in the exposed portions of the notches 63 of the treatment instrument raising base 26, so that the cleaning liquid and the disinfecting liquid can be sufficiently spread or penetrated. It is supposed to do. The abutting step 54 is also exposed in the notch 63 so as to be easily cleaned and disinfected.

Raising wire 27 connected to raising base 26
Extends over the slope portion 53 of the tip component body 36, enters the insertion portion 4, and extends to the operation portion 2. The liquid in the body cavity easily enters between the raising wire 27 and the slope portion 53 and easily accumulates therein. To prevent this, a wall portion 59 is provided between the raising wire 27 and the treatment instrument raising base 26.

In the cleaning procedure of the tip forming portion 15 in this embodiment, first, the tip cover 37 is removed and the tip forming portion main body 36 is washed. The washing step includes a step of brushing the tip component body 36 and the raising base 26 with a brush (not shown) or the like. Further, in the step of washing the raising shaft 35, a washing liquid is sprayed onto the raising shaft 35 exposed by the notch 63 using a syringe (not shown) or a pump-type water pick (not shown) (hereinafter referred to as flush). .).

After flushing, the raising table 26 is moved up and down a few times to flush the cleaning liquid again. After the cleaning process is finished, the disinfection process is performed and the electronic endoscope 2 is stored. However, falling bacteria in the storage environment cause the electronic endoscope 2 to fall.
May be adhered to.

Dropper bacteria are less likely to adhere to the insertion portion 11 because there is not much unevenness, but faller bacteria are likely to adhere to the distal end component body 36 and the treatment instrument raising base 26 due to their complicated structure. As shown in FIG. 5, a storage cover 65 with no windows for preventing falling bacteria is attached to the tip component body 36. FIG. 8 (B) shows a sectional view of the storage cover 65 on the C surface of FIG. 8 (A).

The storage cover 65 is provided with a locking hole 66 for locking the locking pin 38 of the main body 36 of the distal end portion.
The locking hole 66 of the storage cover 65 does not penetrate.
The storage cover 65 'shown in FIG. 9 has a structure that covers up to the base end of the insertion portion 11. FIG. 10 shows an inexpensive umbrella-shaped falling bacteria prevention cover (umbrella) 67 and an O-ring-shaped falling bacteria prevention cover (O-ring-shaped) 68, which can be attached more easily than the storage cover 65 'and the like, and the tip thereof is shown. By attaching the umbrella-shaped falling bacteria prevention cover 67 or the O-ring-shaped falling bacteria prevention cover 68 at a position slightly rearward from the base end of the component main body 36, it is possible to prevent the falling bacteria from adhering to the lower tip component main body 36 side. I try to prevent it.

FIG. 11 shows the vicinity of the distal end forming portion 15 of the electronic endoscope 2 equipped with the tube-shaped falling bacteria prevention cover 69.

Since the tube-shaped falling bacteria prevention cover 69 is made of an elastic material such as silicon rubber, the tube-shaped falling bacteria prevention cover 69 shown on the right side of FIG. As shown on the left side of FIG. 11, it can be mounted so as to cover the tip forming portion 15 to prevent the attachment of falling bacteria.

As shown in FIG. 12, escape to the side surface 70 of the raising base of the tip component body 36 so that the knife for high frequency current treatment used in transendoscopic papillotomy does not touch the tip component body 36. A section 71 is provided.

According to the first embodiment thus constructed, holes 60, 61 in which the raising shaft 35 of the treatment instrument raising base 26 and the raising wire fixing member 48 are fitted and attached,
Since the substantially central portion of 62 is cut away, the function of fitting and holding the raising shaft 35 and the raising wire fixing member 48 as a fitting member is ensured, and the raising shaft 35 and the raising wire fixing member 48 are secured.
Most of it is exposed.

Therefore, since most of the raising shaft 35 and the raising wire fixing member 48 are exposed, the cleaning liquid can be directly sprayed with a syringe or the like, and the cleaning brush can be directly brushed, so that the cleaning effect can be obtained. improves. Also,
Even when immersed in the disinfecting solution, most of the raising shaft 35 and the raising wire fixing member 48 are exposed by the notch 63, so that the notch 63 can be sufficiently immersed in the disinfecting solution, and thus more sufficient disinfection. To enable. Further, the labor required for cleaning can be shortened by exposing only (most of) the raising shaft 35 and the raising wire fixing member 48,
Therefore, the labor can be saved.

Next, a second embodiment of the present invention will be described. FIG.
3 shows the treatment instrument raising base 26 in the second embodiment, and FIG.
3A is a perspective view from diagonally above, and FIG. 13B is a perspective view from diagonally below. Instead of providing the holes 60, 61, 62 and the notch 63 in the treatment instrument raising base 26 of the first embodiment, as shown in FIG.
So as to rotatably hold the fitting shaft 72a in the raising shaft 35.
And a notch 72b formed by notching the fitting hole 72a in the axial direction of the raising shaft 35, and a fitting hole 73a fitted into the raising wire fixing member 48 for fixing the raising wire fixing member 48. A notch 73b that is cut out along the axial direction of the fitting hole 73a is provided on the rear end side and near the bottom of the front end.

FIG. 14 shows an external view of the raising wire fixing member 48 and an external view of the treatment instrument raising base 26. The raising wire fixing member 48 is provided with notches 74 formed by cutting out the outer circumferential surface of the raising wire fixing member 48 in the axial direction, for example, at four locations. By providing the cutout portion 74, the cleaning liquid and the disinfecting liquid sufficiently permeate around the raising wire fixing member 48.

FIG. 15 is a cross-sectional view of the vicinity of the distal end forming portion 15 of the electronic endoscope 2, and FIG. 16 is a view on arrow D of FIG.

As shown in FIG. 16A, a treatment instrument holding groove 76 is provided as a treatment instrument holding means at a substantially central portion of the treatment instrument guide path 75 of the distal end cover 37 shown in FIG. Since the treatment tool holding groove 76 is formed of, for example, silicon rubber, like the tip cover 37, the treatment tool holding groove 76 shown in FIGS.
As shown in (C), a treatment instrument 77 having a small outer diameter or a treatment instrument 77 having a large outer diameter holds the treatment instrument 77 in a stable state regardless of the size of the outer diameter (that is, treatment is performed by elastically holding the treatment instrument 77). The treatment instrument 7 without axial fluctuation of the instrument 77
7) A treatment instrument guide path 75 having a treatment instrument holding groove 76 formed therein.
It is possible to guide along.

FIG. 17 is an external view of the distal end constituting portion 15 of the electronic endoscope 2 having the distal end cover 37 for the biliary tract endoscope 78 attached thereto, and FIG. 18 is a sectional view of the distal end constituting portion 15. The bile duct endoscope 78 is similar to the treatment instrument 77 in the treatment instrument channel 2
Although it is an endoscope that is inserted through the inside of the catheter 4 and protrudes from the distal end configuration portion 15 to perform a biliary tract inspection, since the diameter thereof is larger than that of the treatment instrument 77, the biliary tract endoscope 78 cannot be inserted with the same groove width as the treatment instrument 77. . Therefore, the groove width of the tip cover 37 for the biliary endoscope 78 is wide, and the angle of the treatment instrument guide groove 76 is also larger than that of the tip cover 37 for the treatment instrument 77.

Since the operation of the second embodiment is provided with the notches 72b and 73b in the axial direction, the raising shaft 35 and the wire fixing member 48 are rotated by rotating the raising shaft 35 and the wire fixing member 48. Notch 72b, 73b
It can be exposed to all and can be surely cleaned and disinfected. The other effects are almost the same as those of the first embodiment.

Next, a third embodiment of the present invention will be described. Third
In the embodiment, as shown in FIGS. 20 and 21, a transparent elastic cap 80 is attached to the tip forming portion 15.

Treatment instrument channel opening 25 of the electronic endoscope 2
Since it is opened almost to the side, it may be difficult to suck (or have a small suction function) due to the wide opening. Therefore, as shown in FIG. 20, when the transparent and elastic cap 80 is covered, the treatment instrument channel opening 25 is narrowed, so that the suction ability is improved. Others are, for example, the same configurations as those of the first embodiment (in FIGS. 20 and 21, they are shown in a more simplified manner than the tip forming portion of the first embodiment).

In this embodiment, since the elastic cap 80 is made of silicone rubber, the treatment instrument 77 is attached to the electronic endoscope 2.
Even when the elastic cap 80 is inserted into the treatment tool raising stand 26 and raised up on the treatment instrument raising stand 26, the elastic cap 80 can be deformed and raised as shown in FIG. This embodiment can obtain substantially the same operation and effect as the first embodiment.

It should be noted that, in the treatment instrument raising base, a treatment instrument raising base provided with a notch so that only one of the raising shaft and the wire fixing member is exposed belongs to the present invention. It should be noted that embodiments and the like configured by partially combining the above-described embodiments and the like also belong to the present invention.

In the above description, the electronic endoscope incorporating the solid-state image pickup element has been described. However, the present invention is not limited to this, and the tip surface of the image guide fiber is located at the image forming position of the objective lens system. The same can be applied to the case of an optical endoscope also called a fiberscope in which is arranged.

[Additional Notes] 2. In Claim 1, The said notch is provided in the substantially center part of the said treatment tool raising stand with respect to the said raising shaft and the said wire fixing member. Effect: By notching the substantially central portion, it is possible to secure a large exposed portion while ensuring the function of fitting the raising shaft as the fitting member and the wire fixing member. 3. In Claim 1, The said notch was provided in the said raising shaft and the axial direction of the said wire fixing member, It is characterized by the above-mentioned. Effect: Same as claim 1. Further, since it is notched in the axial direction, when it is rotated, the entire fitting member is exposed, and there is no portion that becomes a blind.

4. In Claim 1, the diameter of the said raising shaft arrange | positioned in the said notch and the substantially center part of the said wire fixing member was thinned. Effectiveness: A space is provided to allow the cleaning solution and the disinfectant solution to permeate sufficiently, improving the cleaning performance. 5. In claim 1, an axial groove is provided in the wire fixing member and the raising shaft. Effect: Same as Appendix 4. 6. The abutting portion of the wire fixing member that abuts against the treatment instrument raising base is exposed in the cutout. Effect: Since the abutting portion is exposed, the cleaning liquid and the disinfecting liquid can be permeated into the portion which has conventionally been a blind and has been troublesome to be cleaned, so that the cleaning performance is improved.

7. A distal end cover main body disposed at the distal end of the insertion portion of the endoscope and a bending portion for transmitting a bending operation from the endoscope operating portion to the distal end constituent portion, and a distal end cover detachable therefrom and the distal end. An endoscope having a locking pin for locking a cover in the body of the tip forming section, wherein the locking pin is arranged substantially vertically in a bending direction of the body of the tip forming section. Effect: By being positioned in the vertical direction, the locking hole of the tip cover can be easily removed from the locking pin by pinching the cover in the horizontal direction. Moreover, since the left and right directions are always picked, the observation window and the illumination window are not touched and damaged. 8. In Supplementary Note 7, the size of the upper and lower locking pins is changed. Effect: By changing the size of the locking pin, the small locking pin is mounted first when mounting, and the small locking pin is removed first when removing, while the tip cover is removed at once. It does not come off and is hard to drop off. 9. In Supplementary Note 7, the heights of the upper and lower locking pins are changed. Effect: By changing the height of the locking pin, the one with the lower height is attached first, and the one with the lower height is removed first when detaching, while the tip cover does not come off at once and falls off. It's hard to do.

Background of Supplementary Notes 7 to 9 As a prior art, as a means for locking a removable tip cover to the tip component body, a locking pin is provided on the tip component body to lock it in the locking hole of the tip cover. Means have been devised. However, since the position where the locking pin is arranged has not been determined, there is a possibility that the locking pin may be touched and damaged, for example, to release the locking. Observation window,
The object is to provide an endoscope capable of eliminating damage to the illumination window and the like, and in order to achieve this object, the configurations of Supplementary Notes 7 to 9 are adopted.

10. An endoscope for medical use, wherein a cover for preventing falling bacteria, which is attached to the endoscope when the endoscope is stored, is detachably provided. Effect: It is possible to prevent falling bacteria at the tip of the endoscope without requiring a large storage space, and the labor and time of cleaning and disinfection can be simplified. 11. In Supplementary Note 10, the falling bacteria prevention cover is attached only to the distal end portion of the endoscope. Effect: The protective cover only on the tip side is
Since the rubber etc. has unevenness, it takes time to remove the falling bacteria with a light wiping before use, and conversely, the insertion part can remove the falling bacteria with a wiping amount.
The cost is low and it does not require cleaning and disinfection. 12. In Supplementary Note 10, the falling bacteria prevention cover is formed in a substantially conical shape. Effect: Same as Appendix 11. 13. In Supplementary Note 10, the falling bacteria prevention cover is formed in a ring shape. Effect: Same as Appendix 11.

Background of Supplementary Notes 10 to 13 In the prior art, when the endoscope that has been cleaned and disinfected is stored until the next case, falling bacteria may adhere to the tip, and it is troublesome to clean and disinfect again. It was hanging. Therefore, it is an object to provide an endoscope that does not require the trouble of cleaning and disinfecting again, and the configurations of Supplementary Notes 10 to 13 are adopted to achieve this object.

14. A main body of a distal end forming section disposed at the distal end of an insertion portion of an endoscope and a distal end cover detachably attached to the main body, and a treatment instrument insertion device for guiding various treatment instruments for treating an affected area to the endoscope front end portion. An endoscope having a passage and provided with a treatment instrument raising base for guiding the treatment instrument in front of an opening of the treatment instrument insertion passage, wherein the treatment instrument holding member is provided on the distal end cover. mirror. Effect: Even if the outer diameter of the treatment tool and the inner diameter of the treatment tool guide groove of the treatment tool raising base do not match, the treatment tool can be fixed and stabilized by the treatment tool holding member provided on the tip cover. The operator can smoothly treat the affected area without the treatment tool wobbling. 15. In Supplementary Note 14, the treatment instrument holding member is provided on the distal end cover near the opening of the treatment instrument insertion passage so as to be on the rotation trajectory of the treatment instrument raising base. Since the operation is performed only when the elevator is maximally raised, the holding member can be downsized and the endoscope distal end portion can be downsized, so that the patient's pain when the endoscope is inserted can be reduced. 16. In Appendix 14, the treatment tool holding member is formed in a groove shape. Effect: Same as Note 14.

Background of Supplements 14 to 16 As disclosed in Japanese Utility Model Publication No. 3-40245 as a prior art, the inner diameter of the treatment instrument guide groove of the treatment instrument raising base which is in contact with the outer diameter of the treatment instrument is the same. When the treatment tool raising base was raised, the treatment tool sometimes wobbled. Therefore, it is an object to provide an endoscope that can be guided without the treatment tool wobbling, and in order to achieve this object, the configurations of Supplementary Notes 14 to 16 are adopted.

17. In an endoscope having a tip component body disposed at the tip of the insertion portion of the endoscope and a tip cover detachable therefrom, a first step of removing the tip cover and washing the tip component body A method for cleaning an endoscope, which comprises two steps. Effect: Since the tip of the endoscope is washed after removing the tip cover, it is possible to easily wash the part that was hidden by the tip cover in the past. 18. The method for cleaning an endoscope according to claim 1, wherein the second step includes a brushing step using a cleaning brush or the like. Effect: By further adding the brushing step in claim 1, the cleaning power of the endoscope is further improved.

Background of Supplementary Notes 17 to 18 The method for cleaning the endoscope with removable tip cover has not been clarified so far. Therefore, there is no cleaning method having a large cleaning power. Therefore, in order to provide a cleaning method having a large cleaning power, in order to achieve this object, Appendix 1
The configuration includes steps 7 and 18.

[0067]

As described above, according to the present invention, the tip component body provided at the tip of the insertion portion, the tip cover detachable from the tip component body, and the inside of the insertion portion are provided. A treatment instrument insertion passage that is formed to guide the treatment instrument for treating the affected area to the distal end side opening of the insertion portion, and is disposed near the opening of the treatment instrument insertion passage. In an endoscope having a treatment tool raising base guided through a raising operation wire, a wire fixing member for attaching a tip end portion of the raising operation wire to the treatment implement raising base, and the treatment implement raising base. Since the notch is formed in the treatment instrument raising base so that at least one of the rotatably supported raising shaft is exposed, dirt collected between the raising base, the raising shaft, and the wire fixing member is brushed. The part that can be easily washed by It Habukeru the trouble of cleaning, disinfecting if easily.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of an endoscope apparatus including a first embodiment.

2 (A) is a front view of a distal end forming portion of an insertion portion, and FIG. 2 (B) is a vertical sectional view taken along the line AA of FIG. 2 (A).

FIG. 3 is a sectional view taken along line BB of FIG.

FIG. 4 is a sectional view of a rear end side of a front end forming portion.

FIG. 5 is a perspective view of the structure of the treatment instrument raising base when viewed from diagonally above and diagonally below.

FIG. 6 is a cross-sectional view showing the structure in the vicinity of the treatment tool raising base in the distal end configuration portion.

FIG. 7 is a cross-sectional view showing the structure in the vicinity of the treatment tool raising base in the distal end configuration portion.

8A is a perspective view showing the structure of a storage cover, and FIG. 8B is a cross-sectional view taken along the plane C of FIG. 8A.

FIG. 9 is a side view showing a storage cover that covers the base end of the insertion portion.

FIG. 10 is a cross-sectional view showing another configuration example of the storage cover.

FIG. 11 is a cross-sectional view showing still another storage cover.

FIG. 12 is a plan view showing a main body of the tip forming section provided with a relief section.

13A and 13B show a treatment instrument raising base in a second embodiment, FIG. 13A is a perspective view seen from diagonally above, and FIG. 13B is a perspective view seen from diagonally below.

FIG. 14 (A) is a perspective view showing a wire fixing member, and FIG. 14 (B) is a perspective view showing a raising base to which the wire fixing member is attached.

FIG. 15 is a vertical cross-sectional view showing the structure in the vicinity of the treatment instrument raising base in the distal end configuration portion.

16 is a view showing the function of the treatment tool holding groove of the treatment tool guide path from the direction D in FIG.

FIG. 17 is a perspective view showing an external appearance of a distal end configuration portion of an electronic endoscope equipped with a distal end cover for a biliary tract endoscope.

FIG. 18 is a cross-sectional view showing the structure of the tip forming portion in FIG.

FIG. 19 is a cross-sectional view showing the structure of a tip forming portion in the third embodiment.

20 is a cross-sectional view showing a state in which the treatment tool is projected in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Endoscope device 2 ... Electronic endoscope 3 ... Light source device 4 ... Video processor 5 ... Color monitor 6 ... Air supply device 7 ... Water supply device 11 ... Insertion part 12 ... Operation part 13 ... Universal cord 14 ... Connector 15 ... Tip configuration part 16 ... Curved part 19 ... Angle knob 21 ... Illumination lens 22 ... Objective lens system 24 ... Treatment tool channel 25 ... Treatment tool channel opening 26 ... Treatment tool raising base 27 ... Raising wire 28 ... Treatment tool raising lever 35 ... Raising shaft 36 ... Tip body main body 37 ... Tip cover 48 ... Wire fixing member 60 ... Horizontal holes 61, 62 ... Fitting hole 63 ... Notch

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Koji Nakamoto 2-34-2 Hatagaya, Shibuya-ku, Tokyo Inside Olympus Optical Co., Ltd. (72) Inventor Jun Hiroya 2-43-2 Hatagaya, Shibuya-ku, Tokyo No. Olympus Optical Co., Ltd. (72) Inventor Yoshihiro Iida 2-43-2 Hatagaya, Shibuya-ku, Tokyo Inside Olympus Optical Co., Ltd. (72) Masaaki Nakazawa 2-43-2, Hatagaya, Shibuya-ku, Tokyo No. Olympus Optical Co., Ltd. (72) Inventor Hisao Yabe 2-43-2 Hatagaya, Shibuya-ku, Tokyo Within Olympus Optical Co., Ltd.

Claims (1)

[Claims] 1. A treatment instrument for treating a diseased part, which is formed in the insertion portion, a distal end component body provided at a distal end of the insertion portion, a distal end cover detachable from the distal end component body. And a treatment instrument insertion passage that guides the treatment instrument to the distal end side opening portion of the insertion portion, and a treatment that is disposed near the opening portion of the treatment instrument insertion passage and guides the direction in which the treatment instrument is projected through the raising operation wire. In an endoscope having a tool raising base, both a wire fixing member that attaches a tip end portion of the raising operation wire to the treatment instrument raising base and a raising shaft that rotatably supports the treatment instrument raising base. Alternatively, an endoscope is characterized in that a cutout is formed in the treatment tool raising base so that either one of them is exposed.