CN101073492A - Endoscope - Google Patents

Abstract

An endoscope includes: a treatment instrument elevator base including a contact surface which contacts with a treatment instrument inserted into a treatment instrument insertion channel, and rotatably provided to a distal end to elevate the instrument; a contact portion provided to the distal end to contact with the instrument when the elevator base is elevated; a first leading portion provided to the contact surface to lead the instrument to a predetermined position on the contact surface as the elevator base is rotated; a holding portion provided to the contact surface and the contact portion, and including a grasping surface for sandwiching the instrument with a diameter not exceeding a predetermined value; and a second leading portion provided to the contact portion to lead the instrument larger than the grasping surface away from the holding portion.

Description

Endoscope

The application advocates the priority of Japanese patent application 2006-138302 communique of submitting on May 17th, 2006 and the Japanese patent application 2006-234520 communique of submitting on August 30th, 2006, by reference and in conjunction with its content.

Technical field

The present invention relates to endoscope, relate to especially in the operation that is suitable under the splanchnoscopy of pancreatic duct system and endoscope, carrying out, utilize seal wire to change the endoscope of the operation of treatment instrument.

Background technology

In recent years, in the disposal that digestive system and the intrasystem illness of pancreatic duct are carried out, the situation of using endoscope to carry out endoscopic surgical constantly increases.In the disposal of the pancreatic duct system that utilizes existing endoscope, except the diagnosis that utilizes endoscope to carry out the radiography of bile duct or ductus pancreaticus is disposed, also have by sacculus or control metacheirisis that treatment instrument etc. reclaims the cholelithiasis that is present in the ductus choledochus etc. etc.

In addition, utilizing endoscope to carry out under the situation of endoscopic surgical of ductus pancreaticus, bile duct and common hepatic duct etc., usually, operator generally is performed as follows: after being inserted into the leading section of endoscope insertion part near the vater's papilla, from this, under the perspective of X ray, as guide, conduit treatment instruments such as (catheter) optionally is inserted in ductus pancreaticus or the bile duct with seal wire.

In the operation of under the splanchnoscopy of such pancreatic duct system and endoscope, carrying out, use endoscope to the pancreatic duct system observe/when disposing, under treatment instruments such as conduit being extended through the situation that treatment instrument for endoscope uses in running through with passage, seal wire is inserted into the inside of treatment instrument.

Therefore, when treatment instrument is moved with respect to endoscope, seal wire also moves simultaneously, therefore, for example, under the state after the front end of seal wire inserts nipple, when seal wire is changed treatment instrument as guide, for the front end that keeps seal wire inserts the state of nipple, must in the leading section of insertion section, keep seal wire.

Therefore, in view of such requirement, in the prior art, for example, disclosed such endoscope in TOHKEMY 2002-034905 communique: be provided with the seal wire fixed cell in the insertion section, this seal wire fixed cell ends seal wire can block the mode card that ends and break away from.

The endoscope of this TOHKEMY 2002-034905 communique constitutes, and has: operating portion, and it is connected to the end of side at one's side of leaning on of insertion section; Treatment instrument lifts seat, and it is arranged in the leading section of insertion section, can operate by the operation of operating portion; The guide surface top of lifting seat at above-mentioned treatment instrument is provided with otch as the seal wire fixed cell, lift seat seal wire is lifted by utilizing operating portion to operate this treatment instrument, thereby this otch can only end the seal wire card.

In the endoscope apparatus of such structure, under the situation of using this endoscope that the pancreatic duct system is observed/disposes, lift and utilize the counter-force of inserting the seal wire self behind the nipple by making treatment instrument lift seat, thereby seal wire is pressed and is fastened on and is arranged at treatment instrument and lifts in the otch (silk fastening groove) of the roughly V-shape of seat bottom, and, by upper face side, mechanically fixed thus by the general plane shape of the leading section main body that is pressed in hard.

In addition, having treatment instrument at leading section lifts in the endoscope of seat, be lifted silk and wait and to tangle such unfavorable condition in order not produce treatment instruments such as outstanding seal wire, for example, exist as TOHKEMY 2005-304586 communique is disclosed, the actuating arm of the side inside by being arranged on leading section makes treatment instrument lift an endoscope of lifting.

But, in the existing endoscope described in the above-mentioned TOHKEMY 2002-034905 communique, has following structure: only utilize self counter-force of this seal wire seal wire to be pushed and is fastened in the otch (silk fastening groove) that treatment instrument lifts the roughly V-shape of seat bottom, and, fix by pushing at the upper face side of the general plane shape of leading section main body, therefore, if use the thinner seal wire of external diameter, then self counter-force of this seal wire just diminishes, simultaneously, lift between the otch of seat and the upper surface of leading section main body at treatment instrument and produce the gap.Therefore, the retentivity of seal wire diminishes, existence can not be fully fixing this problem points of seal wire.

In addition, aforesaid maintenance structure mainly relies on the counter-force of seal wire self, therefore, be applied under the situation of seal wire in the mobile grade of external force by the insertion section, also same as described above, the retentivity of seal wire diminishes, also might spin off from otch, thereby exist can not be fully fixing this problem points of seal wire.

Summary of the invention

Therefore, the present invention puts in view of the above problems and finishes, its purpose is the endoscope that provides following: this endoscope has the treatment instrument maintaining body, even described treatment instrument maintaining body under the situation that has applied external force, also can and be fixed on the suitable position that treatment instrument lifts seat with treatment instruments such as seal wire location.

In addition, in the endoscope of TOHKEMY 2005-304586 communique, be thin parts owing to be arranged on the actuating arm of leading section side inside, therefore, because to the actuating arm application of force, the durability of actuating arm might reduce.In addition, in the time can not limiting the slewing area of actuating arm, lift under the state of a butt traction exceedingly when lifting thread at treatment instrument such as seal wire and treatment instrument, can be to connecting the spindle unit application of force that actuating arm and treatment instrument lift seat, same as described above, the durability of shaft portion might reduce.

Therefore,, can also provide such endoscope: can limit the movable range of actuating arm, thereby the durability of actuating arm is improved according to the present invention.

The endoscope of the present invention the 1st aspect has: the insertion section, and it has leading section in front, and is used to insert in the body cavity; Treatment instrument runs through uses passage, and it is provided in the described insertion section, and is communicated to described leading section; Treatment instrument lifts seat, it has and extends through described treatment instrument and run through bearing surface with the described treatment instrument butt in the passage, and free to rotate being arranged in the described leading section, is used for the operation according to operating portion, by the butt of described bearing surface, described treatment instrument is lifted; Abutting part, it is set in the described leading section, and be provided in described treatment instrument lift under the seat situation about lifting can with described treatment instrument butt; The 1st guide portion, it is arranged on the described bearing surface that described treatment instrument lifts seat, is used to follow described treatment instrument to lift the rotational action of seat, described treatment instrument is directed to the precalculated position of described bearing surface; Holding unit, it is arranged on described bearing surface and the described abutting part, in order will to be clamped between described bearing surface and the described abutting part by the described treatment instrument up to till the diameter of pre-sizing of described the 1st guide portion guiding, and the face of controlling with scheduled volume size; And the 2nd guide portion, it is arranged on the described abutting part, and the described treatment instrument that is used for surpassing the face of the controlling size of described holding unit keeps to the direction guiding of leaving described holding unit and to it.

The endoscope of the present invention the 2nd aspect has: the insertion section, and it has leading section in front, and is used to insert in the body cavity; Treatment instrument runs through uses passage, and it is provided in the described insertion section, and is communicated to described leading section; Treatment instrument lifts seat, it has and extends through described treatment instrument and run through bearing surface with the described treatment instrument butt in the passage, and free to rotate being arranged in the described leading section, is used for the operation according to operating portion, by the butt of described bearing surface, described treatment instrument is lifted; Abutting part, it is set in the described leading section, and be provided in described treatment instrument lift under the seat situation about lifting can with described treatment instrument butt; Guide portion, it is used to follow described treatment instrument to lift the rotational action of seat, described treatment instrument is directed to the precalculated position of described abutting part; And be maintained fixed the unit, it is arranged on described bearing surface and the described abutting part, and having the face of controlling, this face of controlling is used for the described treatment instrument till predetermined size diameter by described guide portion guiding is clamped between described bearing surface and the described abutting part.

The endoscope of the present invention the 3rd aspect has: the insertion section, and it has leading section in front, and is used to insert in the body cavity; Treatment instrument runs through uses passage, and it is provided in the described insertion section, and is communicated to described leading section; Treatment instrument lifts seat, and it is arranged in the described leading section free to rotately, according to the operation of operating portion, makes to extend through described treatment instrument and run through with the 1st treatment instrument or the 2nd treatment instrument in the passage and lift; Fixed part, it is provided in the described leading section, becomes make described treatment instrument lift seat action so that the fulcrum during the direction displacement of the described the 1st or the 2nd treatment instrument; The 1st treatment instrument maintaining part, it is arranged on described treatment instrument and lifts on the seat, runs through with described the 1st treatment instrument in the passage and remains on the 1st position extending through described treatment instrument; The 2nd treatment instrument maintaining part, it is arranged on described treatment instrument and lifts on the seat, runs through with described the 2nd treatment instrument in the passage and remains on 2nd position different with the 1st position extending through described treatment instrument; Be maintained fixed the unit, it is separately positioned on described treatment instrument and lifts on seat and the described fixed part, be used for lifted by this treatment instrument that described the 1st treatment instrument that lifts of seat is clamped in that this treatment instrument lifts and this fixed part between; And guide portion, it is arranged on the described fixed part, will not follow described treatment instrument to lift the rotational action of seat and described the 2nd treatment instrument that lifts to the described unit guides that is maintained fixed, and will follow described treatment instrument to lift the rotational action of seat and described the 1st treatment instrument that lifts to the described unit guides that is maintained fixed of this fixed part.

From following with reference to being expressly understood the above and other purpose of the present invention, feature and advantage more the description of accompanying drawing.

Description of drawings

Fig. 1 is that expression the 1st embodiment of the present invention is related, the axonometric chart of the schematic configuration of the entire system of the endoscope apparatus after endoscope and various external device (ED) assembled.

Fig. 2 is the profilograph of wanting portion of internal structure of the leading section of the insertion section in related, the endoscope of expression the 1st embodiment of the present invention.

Fig. 3 is that expression the 1st embodiment of the present invention is related, the axonometric chart of the surface structure of leading section with treatment instrument maintaining body.

Fig. 4 be expression the 1st embodiment of the present invention related, be arranged on the axonometric chart that treatment instrument in the leading section lifts the structure of seat.

Fig. 5 is the axonometric chart that expression the 1st embodiment of the present invention is related, be arranged on the structure of the abutting part in the leading section.

Fig. 6 is the axonometric chart that expression the 1st embodiment of the present invention is related, the treatment instrument when seal wire moves by lifting lifts seat state fixed with the clamping of abutting part.

Fig. 7 is that expression the 1st embodiment of the present invention is related, the vertical view of the concrete structure of the portion that is maintained fixed of the abutting part of Fig. 5.

Fig. 8 is the figure of the effect of explanation the 1st embodiment, is that the expression seal wire is inserted in the leading section main body and treatment instrument lifts an axonometric chart of the outward appearance of the leading section that lifts the preceding state of action.

Fig. 9 is the figure of effect of explanation the 1st embodiment, is that expression makes treatment instrument lift seat lifted and by the 1st guide portion that treatment instrument lifts seat seal wire was directed to the state of fixed position from the state shown in Figure 8 axonometric chart of outward appearance of leading section.

Figure 10 is the figure of effect of explanation the 1st embodiment, in addition, be expression by treatment instrument lift seat lift action make seal wire further from state shown in Figure 9 move to the fixed position and fixing after the axonometric chart of outward appearance of leading section of state.

Figure 11 be expression the 1st embodiment of the present invention related, lift action by what treatment instrument lifted seat, the particle size treatment instrument that will comprise treatment instrument such as conduit by the 2nd guide portion of abutting part be directed to maximum lift the position and fixing after the axonometric chart of outward appearance of leading section of state.

The maintaining part that Figure 12 is that the 1st embodiment of the present invention is related, seal wire lifts seat by treatment instrument with the clamping of the end of the portion that is maintained fixed of abutting part by the leading section among the Figure 10 under the state after controlling along the axial profile of insertion.

The maintaining part that Figure 13 is that the 1st embodiment of the present invention is related, seal wire lifts seat by treatment instrument with the clamping of the face of the portion that is maintained fixed of abutting part by the leading section among the Figure 10 under the state after controlling along the axial profile of insertion.

Figure 14 relates to the 1st embodiment of the present invention, is to be used to illustrate from state shown in Figure 8 to Figure 10 and the action diagram of the effect of state shown in Figure 11.

Figure 15 is the exploded axonometric chart under the state after the actuating arm of the related forward end section of endoscope of the 2nd embodiment of endoscope of the present invention rotates.

Figure 16 is that the related treatment instrument of the 3rd embodiment of expression endoscope of the present invention lifts the fell axonometric chart of surface structure of the forward end section of endoscope under the state of seat.

Figure 17 relates to the 3rd embodiment of endoscope of the present invention, is the forward end section of endoscope of Figure 16 is observed in expression from frontal axonometric chart.

Figure 18 is that the related treatment instrument of the 3rd embodiment of endoscope of the present invention lifts the axonometric chart that seat is in the surface structure of the leading section under the state that lifts.

Figure 19 is the axonometric chart that the related treatment instrument of the 3rd embodiment of expression endoscope of the present invention lifts the outward appearance of seat.

Figure 20 relates to the 3rd embodiment of endoscope of the present invention, is the front elevation that the treatment instrument of Figure 19 lifts seat.

Figure 21 is the exploded perspective view that the related treatment instrument of the 3rd embodiment of expression endoscope of the present invention lifts seat and the actuating arm that is mounted.

Figure 22 be the 3rd embodiment of expression endoscope of the present invention related be equipped with the axonometric chart that treatment instrument behind the actuating arm lifts seat.

Figure 23 is the part sectioned view that the related treatment instrument of the 3rd embodiment of expression endoscope of the present invention lifts seat and the confined state of the turning cylinder of actuating arm.

Figure 24 is the axonometric chart of the forward end section of endoscope under the state of the related expression actuating arm of the 3rd embodiment of expression endoscope of the present invention.

Figure 25 represents the related variation of the 3rd embodiment of endoscope of the present invention, is the part sectioned view that the expression treatment instrument lifts seat and the confined state of the turning cylinder of actuating arm.

Figure 26 is for an existing operation protecting tube that runs through and the profile of coil pipe.

Figure 27 is that supplying when the coil pipe of Figure 26 produces breakage operated a protecting tube that runs through and the profile of coil pipe.

Figure 28 is that a protecting tube that runs through and the profile of coil pipe are operated in related the supplying of the 3rd embodiment of endoscope of the present invention.

Figure 29 relates to the 3rd embodiment of endoscope of the present invention, is that supplying when the coil pipe of Figure 28 produces breakage operated a protecting tube that runs through and the profile of coil pipe.

Figure 30 is the axonometric chart of the related collets of the 3rd embodiment of expression endoscope of the present invention.

Figure 31 relates to the 3rd embodiment of endoscope of the present invention, is the axonometric chart of expression from the angle observed collets different with Figure 30.

Figure 32 is that the 3rd embodiment of expression endoscope of the present invention is related, the front elevation of the leading section under the state after front end hard portion assembling treatment instrument lifts seat and collets.

Figure 33 is that the 3rd embodiment of expression endoscope of the present invention is related, the vertical view of the leading section under the state after front end hard portion assembling treatment instrument lifts seat and collets.

Figure 34 is the figure of the effect of explanation the 3rd embodiment, is that the expression seal wire is inserted in the leading section main body and treatment instrument lifts the figure that seat lifts the preceding state of action.

Figure 35 is the figure of the effect of explanation the 3rd embodiment, is that expression is lifted the figure that seat lifts the preceding state of action from the observed treatment instrument of the angle different with Figure 34.

Figure 36 is the figure of effect of explanation the 3rd embodiment, and the guide surface that to be the expression seal wire lifted seat by treatment instrument is directed to the figure of the original state of seal wire maintaining part 51b.

Figure 37 is the figure of effect of explanation the 3rd embodiment, is that the expression treatment instrument lifts that seat further lifts and seal wire is directed into the figure of the state after the treatment instrument maintaining part.

Figure 38 is the figure of effect of explanation the 3rd embodiment, is the figure that wall portion that wall portion that treatment instrument after representing further to lift lifts seat enters collets dodges the state behind the groove.

Figure 39 is the figure of effect of explanation the 3rd embodiment, the figure of the state after to be the expression seal wire by treatment instrument lift seat and collets and grip.

Figure 40 is the figure of the effect of explanation the 3rd embodiment, is the figure of expression based on the boot state of the seal wire of the seal wire guide portion of collets.

Figure 41 is the figure of effect of explanation the 3rd embodiment, the figure of the state after to be expression with the seal wire of Figure 39 different angles lifted seat and collets and grip by treatment instrument.

Figure 42 is the figure of effect of explanation the 3rd embodiment, is that treatment instrument under the state that only is illustrated in after seal wire is lifted seat and collets and grips by treatment instrument lifts and the figure of seal wire.

Figure 43 is the figure of effect of explanation the 3rd embodiment, is the collets under the state that only is illustrated in after seal wire is lifted seat and collets and grips by treatment instrument and the figure of seal wire.

Figure 44 is the figure of the effect of explanation the 3rd embodiment, is to be used to illustrate that this treatment instrument when lifting the particle size treatment instrument lifts the figure of seat.

Figure 45 is the figure of effect of explanation the 3rd embodiment, is the front elevation that the treatment instrument of Figure 44 lifts seat.

The specific embodiment

Below, with reference to accompanying drawing, embodiments of the present invention are described.

(the 1st embodiment)

From Fig. 1 to Figure 14, represent the 1st embodiment of the present invention, Fig. 1 is the axonometric chart of schematic configuration of the entire system of the endoscope apparatus expression is assembled the endoscope of the 1st embodiment with various external device (ED) after, Fig. 2 is the profilograph of wanting portion of internal structure of the leading section of the insertion section of expression in the endoscope, and Fig. 3 is the axonometric chart of surface structure of representing to have the leading section of treatment instrument maintaining body.

As shown in Figure 1, the endoscope 1 of the 1st embodiment for example with as light supply apparatus 2, image processing apparatus 3, monitor 4, keyboard with key supporting 5, the suction pump device 6 of external device (ED), send equipment groups such as water bottle 7 to combine, constitute endoscopic system.And these equipment are set on the stand 9 of band carrying wheel (career) 8.

Endoscope 1 constitutes to have: be inserted into endoceliac elongated insertion section 10; Be connected to this insertion section 10 base end part by the operating portion 11 of side at one's side; Base end part is connected to the general cord (universal cord) 12 of this operating portion 11.

Insertion section 10 constitutes to have: have flexible elongated flexible pipe portion 13; Be connected to the bending section 14 of the front end of this flexible pipe portion 13; Be connected with and be configured in the leading section 15 of hard of the foremost position of insertion section 10 with this bending section 14.

In addition, the leading section at the general cord 12 that is connected to operating portion 11 is provided with adapter 12a.This adapter 12a is provided with light guide adapter portion and electric contact portion.And this adapter 12a is connected to the light supply apparatus 2 as external device (ED).

In addition, this adapter 12a is connected to image processing apparatus 3 by the signal cable 16a that is connected with the holding wire of inside.

On the outer peripheral face of the leading section 15 of endoscope 1, be formed with side by the notch 15a of the recess of otch.And,, dispose the 15A of access portal portion (with reference to Fig. 2) in the lateral side of this notch 15a.In addition, as shown in Figure 3,, be equipped with illuminating lens (illuminating window) 24a of lamp optical system and object lens (observation window) 24b of viewing optical system side by side on the next door of the 15A of this access portal portion.

In addition, on the rear end wall 15b of the notch 15a of leading section 15, the outstanding setting nozzle 24c that water is used that supplies gas.This nozzle 24c is sprayed onto fluids such as water or air on the outer surface of object lens 24b, carries out the cleaning of this lens face.

In addition, though do not illustrate, on illuminating lens 24a, be connected with light guide as optical transmission pathway.In the inboard of object lens 24b, dispose (the Charge Coupled Device: charge-coupled image sensor) of the CCD as imaging apparatus that constitutes viewing optical system.This CCD is connected to the circuit substrate that is used to extract picture signal.

And above-mentioned do not have illustrated light guide, CCD and circuit substrate to be configured in to be formed in the incorporating section of front end hard portion 24, the leading section main body that this front end hard portion 24 constitutes in leading sections 15.

On the operating portion 11 of endoscope 1, be respectively arranged with: bending operation portion 17, its bending section 14 that is used to make insertion section 10 is along up and down or the left and right directions bending; The water button 18 of supplying gas; And attraction action button 19.In addition, at the base end part of operating portion 11, be equipped with and be communicated to the insertion oral area 21 that treatment instrument runs through usefulness passage 26 (with reference to Fig. 2).

And operator can optionally make the nozzle 24c ejection gas and the liquid of leading section 15 by the operation water button 18 of supplying gas.In addition, operator attracts action button 19 by operation, can run through with passage 26 making the 15A of access portal portion of leading section 15 selectively act on captivation by treatment instrument, thereby can reclaim endoceliac mucus etc.

In addition, though diagram not in the inside of operating portion 11, is built-in with and lifts an actuating mechanism (not shown), it is used to be operationally connected to, and treatment instrument lifts seat 23 lifts silk 30.Lift in the actuating mechanism (not shown) at this, be provided with not shown links such as linkage component,, the base end part that lifts silk 30 is coupled together with the operation knob 16 that lifts that is arranged on the operating portion 11 by links such as this linkage components.

Thus, by the operation of being undertaken by operator of lifting operation knob 16 to operating portion 11, lift the links such as linkage component of an actuating mechanism via above-mentioned formation, 30 carrying out draw operations to lifting silk, is that action is lifted at the center thereby treatment instrument lifts seat 23 to lift a rotating fulcrum 28.Thus, lift, run through with self just being lifted to the guiding catheter and the seal wire 33 of outer side derivation in the passage 26 and from the 15A of access portal portion thereby extend through treatment instrument by making treatment instrument lift seat 23.

Next, with reference to Fig. 2 one side structure to the leading section 15 of insertion section 10 describe on one side.

As shown in Figure 2, leading section 15 constitutes and has: the front end hard portion 24 as the leading section main body that is formed by metals such as rustless steels for example; And the preceding end shield 25 on every side that forms covering front end hard portion 24 by non-conductive materials such as resins.

In addition, this preceding end shield 25 is fixed in the front end hard portion 24 by bonding grade, and with respect to front end hard portion 24 insulation, guarantee that airtight conditions etc. is that purpose is installed in the front end hard portion 24.In addition, this preceding end shield 25 also can be to constitute removably disposable parts.

In addition, in front end hard portion 24, be formed with the distolateral forward importing guide path 27 that leads of importing with treatment instrument etc.This importing guide path 27 forms, with running through treatment instrument with guide path as treatment instrument and run through with passage (through hole) 26 and be communicated with in the insertion section 10 that is provided in endoscope 1.

Be formed with accommodating chamber 22 in the front that imports guide path 27, this accommodating chamber 22 is the spatial portions that formed by front end hard portion 24 and preceding end shield 25.And,, form the 15A of access portal portion that the formation treatment instrument runs through the front end opening of using passage 26 by the peristome of this accommodating chamber 22.

In accommodating chamber 22, be equipped with: seal wire 33, it runs through with being imported in the passage 26 by treatment instrument; And treatment instrument lift the seat 23, its be used for treatment instruments such as guiding catheter to the expectation the position lift.This treatment instrument lifts seat 23 and is arranged on by an end and lifts 28 supportings of a rotating fulcrum for rotating in the front end hard portion 24.

This lifts the downside position that a rotating fulcrum 28 is configured in the front opening part that imports guide path 27.And, treatment instrument lifts seat 23 and is installed into and can freely lifts action as follows: lifting a rotating fulcrum 28 with this is the center, in accommodating chamber 22, the position of readiness of representing with solid line from Fig. 2 turns to the treatment instrument of representing with imaginary line among this figure and lifts the position.

In addition, lifting silk 30 leading section is fixed on treatment instrument and lifts on the seat 23.This lifts silk 30 and is directed to operating portion 11 sides by guide pipe 31, the guide thimbles 32 that run through in the insertion section 10, and is connected to an above-mentioned not shown actuating mechanism of lifting.And treatment instrument lifts seat 23 and constitutes, and follows the draw operations of lifting silk 30, is that action is lifted at the center to lift a rotating fulcrum 28.

In the endoscope 1 of present embodiment, can be improved to:, also can and be fixed on the suitable position that treatment instrument lifts seat 23 treatment instruments such as seal wire location even applying under the situation of external force.

With reference to Fig. 2 to Fig. 7, one side describes such concrete structure on one side.

In addition, Fig. 4 is that expression is arranged on the axonometric chart that the interior treatment instrument of leading section lifts the structure of seat, Fig. 5 is the axonometric chart that expression is arranged on the structure of the abutting part in the leading section, to be the expression seal wire lift the axonometric chart of seat state fixed with the clamping of abutting part by the treatment instrument that lifts when action to Fig. 6, and Fig. 7 is the vertical view of concrete structure of the portion that is maintained fixed of the abutting part of presentation graphs 5.

As shown in Figures 2 and 3, lift the bearing surface 23a that is formed with on the seat 23 with treatment instrument butts such as seal wire 33 and guiding catheters at treatment instrument.The inclined plane that this bearing surface 23a is tilted by the importing axle with respect to importing guide path 27 etc. forms.

And, being formed with the 1st guide portion 23b on the top of this bearing surface 23a, the 1st guide portion 23b follows treatment instrument to lift seat 23 rotational action (lifting action), with seal wire 33 grade treatment instruments contact it led on one side, one side is to its channeling conduct.

The 1st guide portion 23b constitutes the part of treatment instrument maintaining body, at length say, as shown in Figure 4, lift from treatment instrument seat 23 bearing surface 23a, for example top becomes inclined plane or curved surface towards the end of object lens 24b side.

And the tilt quantity of the 1st guide portion 23b or the amount of bow of curved surface (R amount) are not limited especially as long as the seal wire 33 that is contacted can be lifted swimmingly the maintaining part 23c guiding of the portion that is maintained fixed of seat 23 to formation treatment instrument described later.

And, lift on seat 23 the 1st guide portion 23b to be provided with at treatment instrument and be used for the clamping and the fixing maintaining part 23c of seal wire 33 in the mode that is connected with the 1st guide portion 23b at least.And this maintaining part 23c forms the part of above-mentioned the 1st guide portion 23b.

As shown in Figure 4, this maintaining part 23c forms with abutting part 34 clampings described later and keeps by the face of controlling of the required pre-sizing of the seal wire till predetermined diameter 33 of the 1st guide portion 23b guiding.

And so-called is the parts that use in disposing usually up to the seal wire till the predetermined diameter 33, be equivalent to diameter for example from about 0.508mm to about 1.016mm the seal wire 33 of (from about 0.02 inch to about 0.04 inch).In addition, also be not limited in the seal wire 33 of such diameter.

In addition, in order to improve the retentivity to seal wire 33, the shape of the face of controlling of maintaining part 23c for example can form circular shape in the mode corresponding with the circular shape of this seal wire 33, perhaps, also can form the roughly groove shape of V word shape.In addition, the face of controlling also can form the big shape of contact area change with respect to seal wire 33.That is, no matter what kind of shape the face of controlling is, the retentivity that maintaining part 23c forms seal wire 33 becomes big.

Lift seat 23 at the treatment instrument of this structure and be installed in the front end hard portion 24 free to rotate, as shown in Figures 2 and 3, be provided with the abutting part 34 of a part that constitutes the treatment instrument maintaining body in interior side-prominent mode towards accommodating chamber 22.

This abutting part 34 for example constitutes with insulating element, as Fig. 3 and shown in Figure 5, for example, in the bottom of object lens 24b side, be formed with and be maintained fixed the 34a of portion, this be maintained fixed the 34a of portion be used for be contained in treatment instrument lift seat 23 maintaining part 23c seal wire 33 butts and be fixed.

This is maintained fixed the 34a of portion and forms, and be located at treatment instrument and lift seat 23 and lift the position that a maintaining part 23c of 23 faces with treatment instrument when lifting, and 23c is side-prominent to this maintaining part.

Fig. 7 is the cross section in the horizontal direction of the 34a of the portion that is maintained fixed of expression abutting part 34, as shown in Figure 7, this is maintained fixed the 34a of portion and has the 34a1 of the portion of remaining valid, this 34a1 of portion that remains valid has reliably and seal wire 33 (seal wire 33 in the thin footpath of for example about 0.508mm of diameter (0.02 inch) specifically) butt and the required width that is fixed till above-mentioned predetermined diameter.

In the case, the width L that is maintained fixed the 34a of portion is preferably formed to littler than the radius G (with reference to Figure 14) of the particle size treatment instrument 33A that comprises treatment instruments such as above-mentioned conduit.In addition, the width O of the 34a1 of the portion that remains valid that is maintained fixed the 34a of portion is preferably basic identical with the diameter of the seal wire 33 in thin footpath, perhaps forms the diameter more than or equal to seal wire 33 at least.

In addition, for will be than the diameter of the seal wire 33 thick particle size treatment instrument 33A that comprises treatment instrument such as conduit easily to the 2nd guide portion 34b guiding described later, the 34a1 of portion for example forms circular shape (with reference to Fig. 7) to the bight 40a of the 2nd guide portion 34b described later from remaining valid.

And the shape of this bight 40a is not limited to such circular shape, for example, also can form coniform.That is, the shape of bight 40a so long as can will comprise the particle size treatment instrument 33A of treatment instrument such as conduit get final product to the sort of shape of the 2nd guide portion 34b guiding swimmingly.

In addition, be formed with the 2nd guide portion 34b on the top of abutting part 34, follow treatment instrument to lift the rotational action (lifting action) of seat 23, particle size treatment instrument 33A size, that comprise treatment instrument such as conduit that the 2nd guide portion 34b will surpass on one side the face of controlling of maintaining part 23c leads (direction of leaving object lens 24b) to leaving the direction that is maintained fixed the 34a of portion, one side to its channeling conduct.

And the particle size treatment instrument 33A size of the so-called face of controlling that surpasses above-mentioned maintaining part 23c, that comprise treatment instrument such as conduit is that diameter for example is about the above treatment instrument of 1.016mm (0.04 inch).

The 2nd guide portion 34b constitutes the part of treatment instrument maintaining body, at length says, as Fig. 5 and shown in Figure 7, forms from the bight 40a that is maintained fixed the 34a of portion to becoming inclined plane or curved surface with the rightabout end of object lens 24b.

And the tilt quantity of the 2nd guide portion 34b or the amount of bow of curved surface (R amount) are not limited especially as long as the particle size treatment instrument 33A that comprises treatment instrument such as conduit that contacted can be maintained fixed the 34d of portion guiding to described later swimmingly.

In addition, be formed with in a part that forms the 2nd guide portion 34b and away from the part that is maintained fixed the 34a of portion preset distance and be maintained fixed the 34d of portion, this is maintained fixed the 34d of portion and carries out clamping by lifting seat 23 bearing surface 23a with treatment instrument, comes the particle size treatment instrument 33A that comprises treatment instrument such as conduit is maintained fixed.And this is maintained fixed the 34d of portion with respect to the 2nd guide portion 34b, is arranged on and the portion 34a of being maintained fixed becomes the position of opposition side.

Be maintained fixed the shape of the face of controlling of the 34d of portion about this, the maintaining part 23c that lifts seat 23 with above-mentioned treatment instrument is same, for example, also can form circular shape in the mode corresponding with the circular shape of the particle size treatment instrument 33A that comprises treatment instruments such as conduit, perhaps, also can form the roughly groove shape of V word shape.In addition, the face of the controlling contact area that also can form with respect to the particle size treatment instrument 33A that comprises treatment instrument such as conduit becomes big shape.

And, in the present embodiment, be illustrated on the 2nd guide portion 34b of abutting part 34, being provided with the structure that is maintained fixed the 34d of portion, but be not limited thereto, also can not be provided with and be maintained fixed the 34d of portion, and utilize the part of the 2nd guide portion 34b and treatment instrument to lift the bearing surface 23a of seat 23, the particle size treatment instrument 33A that comprises treatment instrument such as conduit is maintained fixed.

In addition, be formed with at the base end part of the 2nd guide portion 34b of abutting part 34 and dodge groove 34c, this end of dodging the bearing surface 23a that groove 34c is used to make treatment instrument lift seat 23 embeds and dodges in the direction of abutting part 34.Thus, treatment instrument lifts seat 23 and abutting part 34 and just can or comprise the particle size treatment instrument 33A of treatment instrument such as conduit and it is maintained fixed with the mode clamping seal wire 33 of the retentivity that obtains to be scheduled to.

And Fig. 6 represents that abutting part 34 that the treatment instrument by such formation treatment instrument maintaining body lifts seat 23 and front end hard portion 24 comes the seal wire 33 in the thin footpath of clamping and to its state that is maintained fixed.That is, seal wire 33 lifts seat 23 maintaining part 23c by treatment instrument and locatees with the face of controlling of the 34a of the portion that is maintained fixed of abutting part 34 and control fixing securely.

In addition, comprise in use under the situation of particle size treatment instrument 33A of treatment instruments such as conduit, this particle size treatment instrument 33A that comprises treatment instrument such as conduit via the 34a of the portion that is maintained fixed of abutting part 34 by the 2nd guide portion 34b guiding after, the bearing surface 23a that lifts seat 23 by 34d of the portion that is maintained fixed on the 2nd guide portion 34b and treatment instrument positions.

Secondly, on one side with reference to Fig. 8 to Figure 14, one side describes the effect of the endoscope 1 of present embodiment.

And, Fig. 8 to Figure 14 is the effect that is used to illustrate the 1st embodiment, the axonometric chart of representing the outward appearance of the leading section corresponding with each stage, Fig. 8 represent seal wire be inserted in the leading section main body and treatment instrument lift the seat lift the action before state, Fig. 9 represents to make treatment instrument to lift seat lifted and by the 1st guide portion that treatment instrument lifts seat seal wire was directed to the fixed position from state shown in Figure 8 state, Figure 10 represent by treatment instrument lift seat lift action make seal wire further from state shown in Figure 9 move to the fixed position and fixing after state, Figure 11 represents to lift action by what treatment instrument lifted seat, the particle size treatment instrument that will comprise treatment instrument such as conduit by the 2nd guide portion of abutting part be directed to maximum lift the position and fixing after state.And, Figure 12 maintaining part that to be seal wire lift seat by treatment instrument with the clamping of the end of the portion that is maintained fixed of abutting part by the leading section among the Figure 10 down of the state after controlling along inserting axial profile, Figure 13 be seal wire by treatment instrument lift the clamping of face of the portion that is maintained fixed of the maintaining part of seat and abutting part and leading section among Figure 10 under the state of quilt after controlling along the axial profile of insertion.Figure 14 is used to illustrate from state shown in Figure 8 to Figure 10 and the action diagram of the effect of state shown in Figure 11.And Fig. 9 describes as the direction corresponding with the direction of the arrow A shown in Figure 14, B, C and D to arrow A shown in Figure 11, B, C and D direction.

Now, suppose that operator uses 1 pair of pancreatic duct of endoscope of the 1st embodiment to observe or dispose.In this case, operator is inserted into treatment instrument with guiding catheter from the insertion oral area 21 of the operating portion 11 of endoscope 1 and runs through with in the passage 26.

And then operator makes this guiding catheter side-prominent to the outside from the 15A of access portal portion, inserts in pancreas/bile duct (not shown) via nipple.Then, operator is replaced by the treatment instrument that then will use with guiding catheter just in use.

In this case, operator at first passes through the joint insertion seal wire 33 of the base end side of guiding catheter.And then, under the perspective of X ray, the leading section of this seal wire 33 has been inserted into pancreas/bile duct inside has confirmed the base end side of seal wire 33 dominated by hand.

Then, operator is extracted the operation of guiding catheter out under this state, utilize to observe image confirm guiding catheter oneself after nipple is extracted, and then, guiding catheter is extracted to side at one's side.

And operator is under the front end of guiding catheter is received to state among the 15A of access portal portion, and operation knob 16 lifts in operating operation portion 11.In addition, Fig. 8 is illustrated in operation, and this lifts before the operation knob 16, and treatment instrument lifts seat 23 and lifts state before.That is, as shown in Figure 8,, lift bearing surface 23a or its a part of butt of seat 23 with treatment instrument from the counter-force of the outstanding seal wire 33 of the 15A of access portal portion by means of himself.

And then, under this state, follow the operation of lifting operation knob 16, lift silk 30 and be pulled operation, be that rotate at the center thereby treatment instrument lifts seat 23 to lift a rotating fulcrum 28, shown in imaginary line among Fig. 2 (or the solid line among Fig. 6), lift like that.

Fig. 8 represents to follow treatment instrument at this moment to lift the state of the initial seal wire that lifts action 33 of seat 23.Promptly, as shown in Figure 8, when treatment instrument lifts seat 23 and begins to lift action (action of lifting to the arrow A direction shown in Fig. 9) from state shown in Figure 8, seal wire 33 lifts the bearing surface 23a of seat 23 by the treatment instrument of institute's butt, contact with the 1st guide portion 23b on one side, lifted the maintaining part 23c guiding of seat 23 on one side to treatment instrument, be directed simultaneously.

If the effect under this situation is illustrated in further detail, then as shown in figure 14, begin to lift when action when treatment instrument lifts seat 23 to the arrow A direction shown in Figure 14, seal wire 33 contact with the 1st guide portion 23b on one side, on one side quilt guided to the arrow B direction shown in Figure 14.That is, seal wire 33 is lifted the maintaining part 23c guiding of seat 23 to treatment instrument by the 1st guide portion 23b.

In addition, comprise in use under the situation of particle size treatment instrument 33A of treatment instruments such as conduit, equally, the particle size treatment instrument 33A that comprises treatment instrument such as conduit is by means of bearing surface 23a, the 1st guide portion 23b of counter-force by institute's butt, as shown in figure 14, lifted the maintaining part 23c guiding of seat 23 to treatment instrument.

And, lift along arrow A direction shown in Figure 9 by further making treatment instrument lift seat 23, thereby seal wire 33 is as Figure 10 and shown in Figure 14, lifted on one side base end part (the arrow C direction shown in Figure 10) guiding of the 1st guide portion 23b of seat 23 to treatment instrument, with this treatment instrument lift the maintaining part 23c butt of seat 23 on one side.When treatment instrument lifts seat 23 when further being lifted, seal wire 33 keeps the state with this maintaining part 23c butt on one side, move to 1 direction of the arrow C shown in Figure 14 on one side, then, butt and go up (with reference to Figure 14) by the 34a of the portion that is maintained fixed that is pressed on the abutting part 34 that is arranged at front end hard portion 24.

In this case, will keep collinear counter-force owing to seal wire 33 effects from hard have, therefore, seal wire 33 is pressed against in the maintaining part 23c by means of this counter-force, is only ended (Department thereby block securely).Simultaneously, under this state, seal wire 33 is as Figure 10, Figure 12 and shown in Figure 14, the 34a of the portion that the is maintained fixed clamping of maintained portion 23c and abutting part 34 on one side, on one side by being positioned at predetermined fixed position with the butt that is maintained fixed the 34a of portion, being on the maintaining part 23c, under this state, seal wire 33 quilts mechanical fixation securely get up.And Figure 10, Figure 12 and Figure 13 represent that the be maintained fixed portion 34a of seal wire 33 by abutting part 34 is securely fixed on the precalculated position of maintaining part 23c that treatment instrument lifts seat 23.

That is, along with treatment instrument lifts seat 23 lift, as shown in figure 12, seal wire 33 is held the end of fixed part 34a and maintaining part 23c and controls fixingly, and then as shown in figure 13, the face and the maintaining part 23c that are held fixed part 34a control fixing.This can adjust by the operational ton of not shown operating portion.In addition, the difference of hardness that also can be by seal wire 33 self is adjusted.

On the other hand, comprise in use under the situation of particle size treatment instrument 33A of treatment instruments such as conduit, the particle size treatment instrument 33A and the seal wire 33 that comprise treatment instruments such as conduit are same, lifted base end part (the arrow C direction Figure 14 shown in) guiding of the 1st guide portion 23b of seat 23 to the 1st guide portion 23b by treatment instrument, but effect difference after this.

Promptly, for the particle size treatment instrument 33A that comprises treatment instruments such as conduit, because its size surpasses the size (for example width L: with reference to Fig. 7, Figure 14) of the face of controlling of maintaining part 23c, therefore, the power that applies by means of following treatment instrument to lift the rotational action (lifting action) of seat 23 is guided to the 2nd guide portion 34b of abutting part 34 (the arrow D direction shown in Figure 11 and Figure 14) via 34a1 of the portion that remains valid (with reference to Fig. 7) that is maintained fixed the 34a of portion and bight 40a.That is, the particle size treatment instrument 33A that comprises treatment instruments such as conduit is not limited to the 34a of the portion that is maintained fixed of abutting part 34.

Then, follow treatment instrument to lift lifting of seat 23, the particle size treatment instrument 33A one side that comprises treatment instruments such as conduit is pushed by bearing surface 23a, on one side by the 2nd guide portion 34b of abutting part 34 to being maintained fixed direction (being exactly the direction of leaving from object lens 24b, the arrow D direction shown in Figure 11 and Figure 14) that the 34a of portion leaves and leading and be directed from above-mentioned.

Then, when treatment instrument lifts seat 23 when further being lifted, after the particle size treatment instrument 33A that comprises treatment instrument such as conduit is directed into the part of the 2nd guide portion 34b or is directed into the 34d of the portion that is maintained fixed that is arranged on the 2nd guide portion 34b, go up (with reference to Figure 14) with regard to butt and by the 34d of the portion that is maintained fixed that is pressed in the 2nd guide portion 34b or be arranged on the 2nd guide portion 34b.

And then operator further confirms after seal wire 33 has been fixed, from operating portion 11 sides of endoscope 1 guiding catheter is fully extracted and is disposed apparatus and run through outside with passage 26.Then, the operator treatment instrument that will then will use inserts from the base end part side of seal wire 33.

In this case, operator extends through treatment instrument with treatment instrument and runs through with in the passage 26 under with the state of seal wire 33 as guide.And then operator lifts seat operation in 23 o'clock and lifts operation knob 16 by touch treatment instrument at the treatment instrument front end, treatment instrument is lifted seat 23 fell.Thus, lifted seat at treatment instrument at 23 o'clock by treatment instrument, seal wire 33 ejects from maintaining part 23c by the power that is pressed into of treatment instrument this moment, thereby removes the stationary state of seal wire 33.And then operator further inserts treatment instrument in pancreas/bile duct.

Thereby,, utilize the 34a of the portion that is maintained fixed clamping that treatment instrument lifts seat 23 maintaining part 23c and abutting part 34 to carry out mechanical fixation as the seal wire 33 of treatment instrument according to the 1st embodiment.Therefore, even seal wire 33 is applied under the situation of external force in the mobile grade because of the insertion section, the endoscope 1 of present embodiment also can firmly fix seal wire 33 and remain on treatment instrument and lift suitable position in seat 23 the maintaining part 23c.

In addition, the endoscope 1 of present embodiment has treatment instrument and lifts the 1st guide portion 23b of seat 23 and the 2nd guide portion 34b of abutting part 34, thus, comprise in use under the situation of particle size treatment instrument 33A of treatment instruments such as conduit, only lift by making treatment instrument lift seat 23, the particle size treatment instrument 33A that just can utilize the 2nd guide portion 34b will comprise treatment instrument such as conduit lifts location guide to the maximum of being scheduled to swimmingly.Therefore, the endoscope 1 of present embodiment can prevent the buckling of treatment instrument.

In addition, the face of controlling of the be maintained fixed portion 34a of the endoscope 1 of present embodiment by treatment instrument being lifted seat 23 maintaining part 23c and abutting part 34 forms toroidal or groove shape, thereby, even with respect to the delicate different seal wire 33 of external diameter, also can stablize and be limited to this maintaining part 23c securely.

And, in the 1st embodiment, lift seat 23 the 1st guide portion 23b and maintaining part 23c for treatment instrument, and the configuration of the 34a of the portion that is maintained fixed of abutting part 34 and the 2nd guide portion 34b, set to seal wire 33 being fixed near the object lens 24b side, but be not limited in this.

That is, if as present embodiment, set, can be by the endoscopic images stationary state that remains on the seal wire 33 in the leading section 15 etc. of confirming reliably to be fixed.In addition, opposite with above-mentioned the 1st embodiment, if treatment instrument is lifted the 1st guide portion 23b and the maintaining part 23c of seat 23, and the 34a of the portion that is maintained fixed of abutting part 34 and the 2nd guide portion 34b set to seal wire 33 being fixed on the words of the opposition side of object lens 24b, the scope of can broadening one's vision owing to comprise the seal wire 33 that is fixed, therefore, can also obtain to improve this effect of the property disposed.

(the 2nd embodiment)

Below, according to Figure 15 the 2nd related embodiment of endoscope of the present invention is described.

Figure 15 relates to the 2nd embodiment of endoscope of the present invention, is the exploded axonometric chart under the state after the actuating arm of forward end section of endoscope rotates.And, among Figure 15 the structural element identical with the 1st embodiment given same label and omitted its explanation, only different piece is described.

As shown in figure 15, in the front end hard portion 24 of the endoscope 1 of the 2nd embodiment, be provided with and be used to make treatment instrument to lift the actuating arm 42 that seat 23 carries out rotational action.This actuating arm 42 is configured in the recess 40 in the mode that can rotate by remote manipulation, and this recess 40 forms from the outer peripheral portion depression of circular-arc (direction around axis the is circular-arc) cross sectional shape of forming of front end hard portion 24.The surface of recess 40 is stopped up by cover 41.

This cover 41 is used to seal the peristome of recess 40, so that actuating arm 42 can not cause that action is bad because of soiling solution in the body.In addition, cover 41 is undertaken after bonding or the sealant being installed in dismantledly in the front end hard portion 24 with methods such as Screw are fixing by the low bonding agent of bonding force.

Be used to make operation silk 36 that actuating arm 42 rotates to lift operation knob 16 operation of advancing and retreat by operating portion 11.The silk link 42a that is fixed on the front end of this operation silk 36 is installed among near the front end that is formed at actuating arm 42 the silk intercommunicating pore 42b free to rotately.

And, though do not illustrate, on actuating arm 42,, constituting connection axial region integratedly towards right angle orientation at base end side, this connection axial region can rotate freely ground axle suspension in front end hard portion 24.In addition, being inlaid in treatment instrument at the angle axial region that the fore-end of this connection axial region forms lifts in the axis hole of seat 23.

By such structure, when operation silk 36 is advanced and retreat operation, actuating arm 42 connects by connecting axial region (not shown), so treatment instrument lifts seat 23 with actuating arm 42,28 (with reference to Fig. 2) are that rotate at the center with turning cylinder (lifting a rotating fulcrum).

And, on actuating arm 42, being provided with the 1st chamfered section 42c and the 2nd chamfered section 42c, they are used to prevent the contact that causes because of deviation of the machining tolerance of actuating arm 42 or recess 40 etc.

In the present embodiment, the recess 40 of front end hard portion 24 by side at one's side, be provided with restriction actuating arm 42 to the 1st restriction portion 43 of the rotation of operating portion 11 directions, in addition, be provided with the 2nd restriction portion 44 of restriction actuating arm 42 to the rotation of direction of insertion in the front of above-mentioned recess 40.

The 1st restriction portion 43 and the 2nd restriction portion 44 have bearing surface, form to the mode of the outstanding scheduled volume of direction of actuating arm 42 respectively with the wall thickness part that forms recess 40.That is, by make actuating arm 42 respectively with the 1st, the 2nd restriction portion 43,44 butts, thereby can limit the slewing area of the actuating arm 42 of rotation.

In addition, in the present embodiment, the unit as the durability that is used to make with respect to actuating arm 42 can not reduce is provided with and limits the 3rd 25a of restriction portion or the 25b that treatment instrument lifts the rotational action of seat 23.

The 3rd 25a of restriction portion or 25b are set at the precalculated position of the inboard of preceding end shield 25 for example as Fig. 2 or shown in Figure 15.That is, these the 3rd restrictions 25a of portion or 25b have bearing surface, form in the mode to the outstanding scheduled volume of internal direction.That is, be connected on the 3rd 25a of restriction portion or the 25b, limit the rotational action that this treatment instrument lifts seat 23, consequently,, also can limit its slewing area for lifting seat 23 actuating arms that are connected 42 with this treatment instrument by making treatment instrument lift seat 23.

For other structure and effect, identical with the 1st embodiment.

Thereby,, except that the effect of the 1st embodiment,, therefore, consequently, can obtain making the durability of actuating arm 42 to improve this effect owing to can limit the movable range of actuating arm 42 according to present embodiment.

And, in the 2nd embodiment, the structure that the 1st to the 3rd restriction portion 43,44,25a (25b) are set being illustrated, but also can all not being provided with, the structure that is provided with 1 at least also can obtain same effect.In addition, the 1st to the 3rd restriction portion 43,44,25a (25b) are not limited to the wall thickness of recess 40 and the protuberance shape on preceding end shield 25 bottom surfaces, for example, also can constitute and use pin to wait to limit actuating arm 42 or treatment instrument to lift the movable range of seat 23.

(the 3rd embodiment)

Below, according to Figure 16～Figure 33 the 3rd related embodiment of endoscope of the present invention is described.

Figure 16～Figure 33 relates to the 3rd embodiment of endoscope of the present invention; Figure 16 is that the expression treatment instrument lifts the fell axonometric chart of surface structure of the forward end section of endoscope under the state of seat; Figure 17 is an axonometric chart of observing the forward end section of endoscope of Figure 16 from frontal; Figure 18 is that the expression treatment instrument lifts the axonometric chart that seat is in the surface structure of the leading section under the state that lifts; Figure 19 is the axonometric chart that the expression treatment instrument lifts the outward appearance of seat; Figure 20 is the front elevation that the treatment instrument of Figure 19 lifts seat; Figure 21 is the exploded perspective view that the expression treatment instrument lifts seat and the actuating arm that is mounted; Figure 22 is that expression is equipped with the axonometric chart that treatment instrument behind the actuating arm lifts seat; Figure 23 is the part sectioned view that the expression treatment instrument lifts seat and the confined state of the turning cylinder of actuating arm; Figure 24 is the axonometric chart of forward end section of endoscope that shows the state of actuating arm; Figure 25 represents variation; it is the part sectioned view that the expression treatment instrument lifts seat and the confined state of the turning cylinder of actuating arm; Figure 26 is for an existing operation protecting tube that runs through and the profile of coil pipe; Figure 27 is that supplying when the coil pipe of Figure 26 produces breakage operated a protecting tube that runs through and the profile of coil pipe; Figure 28 is a confession operation protecting tube that runs through of present embodiment and the profile of coil pipe; Figure 29 is that supplying when the coil pipe of Figure 28 produces breakage operated a protecting tube that runs through and the profile of coil pipe; Figure 30 is the axonometric chart of expression collets; Figure 31 is the axonometric chart of expression from the angle observed collets different with Figure 30; Figure 32 is illustrated in the front elevation that front end hard portion assembling treatment instrument lifts the state leading section down behind seat and the collets, Figure 33 be illustrated in front end hard portion assemble treatment instrument lift with collets after state under the vertical view of leading section.

In addition, in the following description, the structural element identical with the 1st, the 2nd embodiment given same label and omitted its explanation, only different piece is described.

As Figure 16 and shown in Figure 17, in the leading section 15 of the endoscope 1 of present embodiment, be equipped with that treatment instrument lifts seat 51 and as the collets 61 of abutting part.It is same that the treatment instrument of state of falling lifts seat the 51 and the 1st embodiment, becomes the interior state of accommodating chamber 22 that is received into.In addition, treatment instrument lifts seat 51 by rotating towards collets 61, thereby as shown in figure 18, become the state of lifting, under this state, same with the 1st embodiment, by collets 61 grip above-mentioned seal wire 33 or conduit, as for example papillotome treatment instruments such as (papillotomy knife) of high frequency cautery electric treatment instrument.

As Figure 19 and shown in Figure 20, it is same that the treatment instrument of present embodiment lifts seat the 51 and the 1st embodiment, is formed with the bearing surface 51a with seal wire 33 or various treatment instrument butts on a face.This bearing surface 51a just become with the 1st embodiment in the same structure of bearing surface 23a (with reference to Fig. 4).

And, the top of this bearing surface 51a be formed with the treatment instrument maintaining part (below, be called the seal wire maintaining part) 51b, this treatment instrument maintaining part 51b has guide surface 51d, this guide surface 51d is also used as the 1st guide portion, be used to follow treatment instrument to lift the rotational action (lifting action) of seat 51, contact with the seal wire 33 in thin footpath it is led, simultaneously to its channeling conduct.The seal wire maintaining part 51b of present embodiment constitutes the part of treatment instrument maintaining body, have with the 1st embodiment in the same structure of the 1st guide portion 23b.

And the tilt quantity of this seal wire maintaining part 51b or the amount of bow of curved surface (R amount) are not limited especially as long as the seal wire 33 in the thin footpath that contacted can be kept to seal wire fixed part 51c guiding described later and to it swimmingly.

In addition, the treatment instrument of present embodiment lifts seat and 51 has wall portion 52, this wall portion 52 from the sidepiece of the seal wire maintaining part 51b of the one side that forms bearing surface 51a, Figure 20 towards the right side of paper projection upward.This wall portion 52 forms the side of seal wire maintaining part 51b, and, extending setting to the direction of the seal wire fixed part 51c described later that becomes proximal direction, this seal wire fixed part 51c constitutes the portion that is maintained fixed that treatment instrument lifts seat 51.

As shown in figure 20, when lifting seat from the top view treatment instrument 51 the time, this wall portion 52 forms and guides and keeps the curved surface of the seal wire maintaining part 51b of seal wire 33 etc. to form successive roughly U word shape, and leaves predetermined space and cover the upper side of seal wire maintaining part 51b.Thus, wall portion 52 will be hooked and remain on the seal wire maintaining part 51b by the seal wire 33 of seal wire maintaining part 51b guiding.

And, lift the seal wire maintaining part 51b of seat 51 on the above-mentioned one side of proximal direction from treatment instrument, be provided with seal wire fixed part 51c in the mode that is connected with seal wire maintaining part 51b, this seal wire fixed part 51c becomes the portion of being maintained fixed, and is used for the seal wire 33 in clamping and fixing thin footpath.And this seal wire fixed part 51c forms the part of seal wire maintaining part 51b, become with the 1st embodiment in the same structure of maintaining part 23c.

As shown in figure 19, this seal wire fixed part 51c forms with collets 61 clampings described later and keeps the face of controlling by the required scheduled volume size of the seal wire 33 in seal wire maintaining part 51b guiding and the thin footpath till predetermined outer diameter that keeps.

And so-called seal wire 33 up to the thin footpath till the predetermined diameter is to use in common disposal, be equivalent to diameter for example from about 0.508mm to about 1.016mm the seal wire of (about 0.02 inch to about 0.04 inch).In addition, also be not limited to the seal wire 33 of such diameter.

In addition, the shape of the face of controlling of seal wire fixed part 51c is also same with the 1st embodiment, in order to improve retentivity to seal wire 33 treatment instruments such as grade in the thin footpath of clamping, for example also can form circular shape, perhaps also can form the roughly groove shape of V word shape.In addition, the face of controlling of seal wire fixed part 51c forms and makes the contact area of treatment instrument etc. of clamping become big such shape, forms in shape arbitrarily, can improve the retentivity to treatment instrument etc.

Lift seat 51 for having as above the treatment instrument of structure, as shown in figure 21, be equipped with connecting hole portion 54 extending the rotating support portion 53 that is provided with to proximal direction from base portion, what this connecting hole portion 54 was used to plug actuating arm 42 lifts a driving shaft 45.This connecting hole portion 54 forms the cubic shape with rectangular-shaped hole face, be set to actuating arm 42 lift the roughly the same size of a driving shaft 45.In addition, be equipped with screwed hole 55 from the substantial middle on one side of connecting hole portion 54 to the side surface direction of rotating support portion 53, this screwed hole 55 (with respect to the one side that forms the hole face, is approximately 45 degree) on the diagonal of above-mentioned hole face.

In this screwed hole 55, screw hold-down screw 56, be fixed in the connecting hole portion 54 of rotating support portion 53 lifting a driving shaft 45.Like this, as shown in figure 22, actuating arm 42 is affixed to treatment instrument and lifts in seat 51 the rotating support portion 53.And actuating arm 42 is provided with flange part 46, is installed in treatment instrument when lifting on the seat 51 when lifting a driving shaft 45, butt of this flange part 46 and rotating support portion 53 and restriction site.

In the present embodiment, as shown in figure 23, hold-down screw 56 is resisted against the bight on the one side of lifting a driving shaft 45, herein, is resisted against the bight of the oblique bottom, a left side of paper, fixedly remains in the connecting hole portion 54 of rotating support portion 53 lifting a driving shaft 45.Under this state, lift on 2 faces that a driving shaft 45 is resisted against the rotating support portion 53 that forms connecting hole portion 54, described 2 faces are the faces of 2 face institute butts that constitute the bight of the circular dashed line α among Figure 23, are the right tiltedly faces of 2 face institute butts in the bight on top that constitutes paper herein.

Therefore, treatment instrument lifts seat 51 rotating support portion 53 and lifts a driving shaft 45 and fixed reliably, thus cause can prevent to assemble the time loosening.Thus, can guarantee that treatment instrument lifts the bed knife of seat 51 and actuating arm 42, become and to carry out to all-the-time stable the structure of lifting the angle operation that treatment instrument lifts seat 51.

In addition, as shown in figure 24, actuating arm 42 and the 2nd embodiment are same, are accommodated in from the outer peripheral portion of leading section 15 to form in the recess 40 of concavity.Lift seat 51 rotations by the lax treatment instrument that makes of the traction of operation silk 36, move to the state of falling that lifts thereby make treatment instrument lift seat 51.

In addition, hold-down screw 56 can constitute with this bearing surface that lifts a driving shaft 45 butts and form the inclined-plane, also can followingly constitute: when tightening, with formation lift above-mentioned 2 faces in above-mentioned bight of a driving shaft 45 and above-mentioned 2 faces of forming connecting hole portion 54 reliably against.

And, as shown in figure 25, lift a driving shaft 45 and also can have the part of 56 butts of hold-down screw is made behind the plane and the bearing surface 45a that forms.Thus, can make hold-down screw 56 and lift a driving shaft 45 butt reliably, can guarantee more that treatment instrument lifts the bed knife of seat 51 and actuating arm 42.In addition, when assembling, be defined to the installation direction of connecting hole portion 54, therefore, can prevent that actuating arm 42 from lifting the mistake installation of seat 51 to treatment instrument owing to lift a driving shaft 45.

But, be used to draw lax actuating arm 42 and with treatment instrument lift seat 51 be operating as the operation silk 36 that lifts the state of falling from the insertion section 10 of endoscope 1 till the operating portion 11, utilize this two-layer protecting tube of coil pipe and polytetrafluoroethylene (registered trade mark) conduit to coat.This is former thereby when damaged because of certain in order to prevent at conduit, because of the damaged section of this coil pipe produces damage at the bending section rubber of the crust that forms bending section 14 etc., polytetrafluoroethylene (registered trade mark) conduit is coated as the most external crust.

In existing structure, as shown in figure 26, the protecting tube 37 that becomes polytetrafluoroethylene (registered trade mark) conduit does not closely contact with metal coil pipe 38, and has gap S.Therefore; under the situation of coil pipe 38 former thereby damaged because of certain (cut-out etc.); the plane of disruption of the damaged B of portion shown in Figure 27 moves with respect to protecting tube 37 advance and retreat because of the bending operation of bending section 14; perhaps up-down vibration; thereby the inner surface of injury protection pipe 37; finally, the above-mentioned damaged B of portion punctures protecting tube 37, makes the bending section rubber breakage of bending section 14 sometimes.

In the present embodiment, as shown in figure 28, form protecting tube 37 and coil pipe 38 tight contacting structure.This protecting tube 37 is heat-shrink tubes, becomes the tight contacting structure of peripheral part with coil pipe 38 by heat treatment.

By forming such structure; as shown in figure 29; under the situation of coil pipe 38 former thereby damaged because of certain (cut-out etc.); even because when bending section 14 carries out bending operation; protecting tube 37 also closely contacts with the peripheral part of coil pipe 38 all the time; so coil pipe 38 can not move freely, therefore, can be because of the inner surface of the plane of disruption injury protection pipe 37 of the damaged B of portion.

Consequently, the damaged B of portion of coil pipe 38 can not puncture protecting tube 37, thereby can not make the bending section rubber breakage of bending section 14.

Then, utilize Figure 30 and Figure 31 that the collets 61 of present embodiment are described.

The collets 61 of present embodiment are equivalent to the abutting part 34 in the 1st embodiment, and it has: the seal wire 33 in thin footpath is carried out fixed seal wire be maintained fixed the 61a of portion; As the seal wire guide portion 61b that the seal wire 33 in thin footpath is maintained fixed the curved inclined-plane of the 61a of portion guiding to seal wire; Dodge groove 61c for what treatment instrument lifted that the end of seat 51 bearing surface 51a embeds; And the wall portion that the wall portion 52 that supplies treatment instrument to lift seat 51 embeds dodges groove 61d.

The bight of leaning on wall portion to dodge groove 61d side that seal wire is maintained fixed the 61a of portion forms the curved surface shape by chamfering, and seal wire is maintained fixed the bearing surface that the 61a of portion becomes 33 butts of seal wire in thin footpath.In addition, seal wire guide portion 61b forms, and further is maintained fixed the 61a of portion from the bight that lower side will lean on wall portion to dodge groove 61d side compared with seal wire, and further chamfering is the curved surface shape.

And label 62 is to have the portion that is maintained fixed that the particle size treatment instrument of same structure, effect and effect is used with the 1st embodiment, omits this is maintained fixed the detailed description of portion 62.

As Figure 32 and shown in Figure 33, the treatment instrument of such present embodiment that constitutes as described above lifts seat 51 and similarly is mounted in the front end hard portion 24 of leading section 15 with collets 61 and the 1st embodiment.

Under this confined state, treatment instrument lifts the seal wire fixed part 51c of seat 51 and the seal wire of collets 61 is maintained fixed the 61a of portion general arrangement on same straight line.Say that at length chain-dotted line L1, the L2 among Figure 32 and Figure 33 represents when treatment instrument lifts seat 51 and lifts by rotation, the face that seal wire fixed part 51c passes through because of the mobile track that forms.

The seal wire that treatment instrument lifts seat 51 seal wire fixed part 51c and collets 61 is maintained fixed the 61a of portion and is positioned at the face that comprises these two lines of chain-dotted line L1, L2.That is, the seal wire of collets 61 is maintained fixed the 61a of portion and is positioned at and comprises treatment instrument and lift the plane of seat 51 seal wire fixed part 51c because of the mobile track plane that forms.

Thus, being lifted the seal wire 33 in the thin footpath that seat 51 seal wire fixed part 51c keeps by treatment instrument follows treatment instrument to lift the action of lifting of seat 51, in above-mentioned plane, move, be maintained fixed the 61a of portion guiding to the seal wire of collets 61 efficiently, and lifted seat 51 by treatment instrument and collets 61 grip reliably.

Then, on one side with reference to Figure 34 to Figure 45, one side describes the effect of the endoscope 1 of present embodiment.

And, Figure 34 to Figure 42 is the effect that is used to illustrate the 3rd embodiment, expression is lifted seat corresponding to the treatment instrument in each stage, the axonometric chart of the seal wire in collets and thin footpath, Figure 34 is that the expression seal wire is inserted in the leading section main body and treatment instrument lifts the figure that seat lifts the preceding state of action, Figure 35 is that expression is lifted the figure that seat lifts the preceding state of action from the observed treatment instrument of the angle different with Figure 34, Figure 36 is that the expression seal wire is directed to the figure of the original state of seal wire maintaining part 51b by the guide surface that treatment instrument lifts seat, Figure 37 is that the expression treatment instrument lifts that seat further lifts and seal wire is directed into the figure of the state after the treatment instrument maintaining part, Figure 38 is that the treatment instrument after representing further to lift lifts the figure that wall portion that the wall portion of seat enters collets dodges the state behind the groove, Figure 39 is the expression seal wire is lifted seat and the state of collets after gripping by treatment instrument figure, Figure 40 is the figure of expression based on the boot state of the seal wire of the seal wire guide portion of collets, the figure of the state of Figure 41 after to be expression with the seal wire of Figure 39 different angles lifted seat and collets and grip by treatment instrument, Figure 42 only is illustrated in seal wire to be lifted by treatment instrument that treatment instrument under seat and the state of collets after gripping lifts and the figure of seal wire, Figure 43 only is illustrated in seal wire to be lifted the collets under seat and the state of collets after gripping and the figure of seal wire by treatment instrument, Figure 44 is used to illustrate that this treatment instrument when lifting the particle size treatment instrument lifts the figure of seat, and Figure 45 is the front elevation that the treatment instrument of Figure 44 lifts seat.

In the following description, suppose that operator and the 1st embodiment similarly use endoscope 1, observe or dispose pancreatic duct.In the explanation herein, only seal wire 33 is described by the effect that the treatment instrument of present embodiment lifts the state of seat 51 and collets 61 clampings, in other action, establish that it is identical with the 1st embodiment.

Operator and the 1st embodiment are same, and guiding catheter is inserted in pancreas/bile duct (not shown) via nipple, insert seal wire 33 from the joint of the base end side of guiding catheter.And then, under the perspective of X ray, the leading section of this seal wire 33 has been inserted into pancreas/bile duct inside has confirmed the base end side of seal wire 33 dominated by hand.

Then, operator is extracted the operation of guiding catheter out, by observing image, confirms guiding catheter after nipple is extracted, and then, guiding catheter is extracted to side at one's side.And then operator is operated the operation knob 16 that lifts of operating portion 11.

When to the lifting operation knob 16 and operate of operating portion 11, the treatment instrument of the Figure 34 and the state that fell shown in Figure 35 lifts seat 51 to begin to lift.And then, follow treatment instrument to lift seat 51 lift, seal wire 33 contacts with guide surface 51d shown in Figure 35 by means of the counter-force of self, thus as shown in figure 36, quilt is guided to seal wire maintaining part 51b.

And then when treatment instrument lifts seat 51 when lifting, seal wire 33 remains on the seal wire maintaining part 51b under the state that the wall portion 52 of a side surface part that is formed seal wire maintaining part 51b hooks.As shown in figure 37, treatment instrument lifts seat 51 and keeps on one side by wall portion 52 seal wire 33 being hooked state on maintaining part 51b, to collets 61 sides rotate on one side, further lift.At this moment, to keep collinear counter-force, therefore,, be blocked securely and end by lifting in the seal wire fixed part 51c of seat 51 by being pressed in treatment instrument because seal wire 33 effects have.

And then, lift seat 51 for the treatment instrument after further lifting, as Figure 38 and shown in Figure 39, the wall portion that wall portion 52 enters collets 61 dodges in the groove 61d.At this moment, seal wire 33 is kept by seal wire maintaining part 51b on one side, on one side as shown in figure 40, contacts with the guide surface on the surface of the seal wire guide portion 61b that becomes collets 61, and quilt is maintained fixed the 61a of portion (the arrow M direction among the figure) to seal wire and leads and be directed.

And then as Figure 39, Figure 41～shown in Figure 43, seal wire 33 lifts the seal wire fixed part 51c of seat 51 by treatment instrument and the seal wire of collets 61 is maintained fixed the 61a of portion clamping securely.

On the other hand, in the particle size treatment instrument 33A that comprises treatment instruments such as conduit, as shown in figure 44, lift the seal wire maintaining part 51b of the bearing surface 51a of seat 51 by treatment instrument, by side directed to seal wire fixed part 51c, but not by entering this seal wire fixed part 51c with wall portion 52 butts, not kept by seal wire fixed part 51c.Promptly, as shown in figure 45, seal wire 33 lifts the wall portion 52 of seat 51 by treatment instrument, guided by seal wire maintaining part 51b, hooked in the 1st position that enters seal wire fixed part 51c, become maintained state, but particle size treatment instrument 33A does not enter seal wire fixed part 51c by wall portion 52, but become the state that is hung in the 2nd position on the bearing surface 51a that remains on.

In other words, treatment instrument lifts seat 51 by lifting, utilization is formed on seal wire 33 or various particle size treatment instrument 33A butt and to the seal wire maintaining part 51b on its bearing surface 51a that keeps, under the situation of seal wire 33, to the seal wire fixed part 51c guiding that becomes the 1st position, under the situation of the particle size treatment instrument 33A more than the predetermined diameter, butt and remaining on becomes on the bearing surface of the 2nd position 51a.That is, seal wire maintaining part 51b formation is lifted a side guide, and this lifts a side guide and follows treatment instrument to lift lifting of seat 51, guiding seal wire 33 or various particle size treatment instrument 33A.

That is, in the present embodiment, treatment instrument lifts seat 51 wall portion 52 to carry out following size and sets, comprise treatment instrument such as conduit, the above particle size treatment instrument 33A of for example diameter 1.016mm (0.04 inch) can not enter seal wire maintaining part 51b.And, for being maintained fixed under the state that lifts that particle size treatment instrument 33A is lifted seat 51 at treatment instrument, since identical with the effect of the 1st embodiment, its explanation of Therefore, omited.

As described above such, in the endoscope 1 of present embodiment, can obtain the effect same with the 1st embodiment, and, be set to the wall portion 52 of the sidewall of seal wire maintaining part 51b on 51 by lift seat at treatment instrument, can be when under the state that hooks seal wire 33 or particle size treatment instrument 33A, lifting, seal wire 33 or particle size treatment instrument 33A swing being suppressed in the Min. of such unnecessary action to the left and right.Therefore, for operator, can prevent from seal wire 33 or the caused operability of unnecessary action of particle size treatment instrument 33A and the reduction of visibility of on the screen of monitor 4, showing out from simultaneously, can reduce the inharmonious sense on the screen.

Invention described in the above embodiment is not limited in this embodiment and variation, in addition, the implementation phase in, in the scope that does not break away from its main idea, can implement all distortion.And then, in the above-described embodiment, comprising the invention in various stages, by the appropriate combination of disclosed a plurality of structure important documents, can extract various inventions.

For example, even the several structural elements of deletion from all the structure important documents shown in the embodiment, can solve in the problem described in invention problem to be solved one hurdle and can obtain under the situation of the effect described in the effect of invention, the structure after this structure important document is deleted also can be used as invention and is suggested.

Though the preferred embodiments of the present invention that describe with reference to the accompanying drawings, but it will be appreciated that and the invention is not restricted to above-mentioned accurate embodiment, those skilled in the art can carry out various changes and modification to this under the situation of the spirit or scope of the present invention that do not break away from the claims qualification.

Claims (15)

1. endoscope, this endoscope comprises:

The insertion section, it has leading section in front, and is used to insert in the body cavity;

Treatment instrument runs through uses passage, and it is provided in the described insertion section, and is communicated to described leading section;

Treatment instrument lifts seat, it has and extends through described treatment instrument and run through bearing surface with the described treatment instrument butt in the passage, and free to rotate being arranged in the described leading section, is used for the operation according to operating portion, by the butt of described bearing surface, described treatment instrument is lifted;

Abutting part, it is set in the described leading section, and be provided in described treatment instrument lift under the seat situation about lifting can with described treatment instrument butt;

The 1st guide portion, it is arranged on the described bearing surface that described treatment instrument lifts seat, is used to follow described treatment instrument to lift the rotational action of seat, described treatment instrument is directed to the precalculated position of described bearing surface;

Holding unit, it is arranged on described bearing surface and the described abutting part, in order will to be clamped between described bearing surface and the described abutting part by the described treatment instrument up to till the diameter of pre-sizing of described the 1st guide portion guiding, and the face of controlling with scheduled volume size; And

The 2nd guide portion, it is arranged on the described abutting part, and the described treatment instrument that is used for surpassing the face of the controlling size of described holding unit keeps to the direction guiding of leaving described holding unit and to it.

2. endoscope as claimed in claim 1 is characterized in that,

Described the 1st guide portion constitutes described treatment instrument is directed to the inclined-plane or the curved surface of end that described treatment instrument lifts the described bearing surface of seat.

3. endoscope as claimed in claim 2 is characterized in that,

Described holding unit constitutes, and when described treatment instrument lifts seat when lifting, the described face of controlling is configured in the end of described bearing surface.

4. the endoscope described in claim 1 is characterized in that,

Described the 2nd guide portion constitutes inclined-plane or the curved surface that described treatment instrument is directed to predetermined fixed position.

5. endoscope as claimed in claim 1 is characterized in that,

Described treatment instrument is a seal wire.

6. endoscope as claimed in claim 5 is characterized in that,

The diameter of described seal wire be at least 0.508mm to 1.016mm.

7. endoscope, this endoscope comprises:

The insertion section, it has leading section in front, and is used to insert in the body cavity;

Treatment instrument runs through uses passage, and it is provided in the described insertion section, and is communicated to described leading section;

Treatment instrument lifts seat, it has and extends through described treatment instrument and run through bearing surface with the described treatment instrument butt in the passage, and free to rotate being arranged in the described leading section, is used for the operation according to operating portion, by the butt of described bearing surface, described treatment instrument is lifted;

Abutting part, it is set in the described leading section, and be provided in described treatment instrument lift under the seat situation about lifting can with described treatment instrument butt;

Guide portion, it is used to follow described treatment instrument to lift the rotational action of seat, described treatment instrument is directed to the precalculated position of described abutting part; And

Be maintained fixed the unit, it is arranged on described bearing surface and the described abutting part, and has the face of controlling, and this face of controlling is used for the described treatment instrument till predetermined size diameter by described guide portion guiding is clamped between described bearing surface and the described abutting part.

8. endoscope as claimed in claim 7 is characterized in that,

Described guide portion is inclined-plane or curved surface.

9. endoscope, this endoscope comprises:

The insertion section, it has leading section in front, and is used to insert in the body cavity;

Treatment instrument runs through uses passage, and it is provided in the described insertion section, and is communicated to described leading section;

Treatment instrument lifts seat, and it is arranged in the described leading section free to rotately, according to the operation of operating portion, makes to extend through described treatment instrument and run through with the 1st treatment instrument or the 2nd treatment instrument in the passage and lift;

Fixed part, it is provided in the described leading section, becomes make described treatment instrument lift seat action so that the fulcrum during the direction displacement of the described the 1st or the 2nd treatment instrument;

The 1st treatment instrument maintaining part, it is arranged on described treatment instrument and lifts on the seat, runs through with described the 1st treatment instrument in the passage and remains on the 1st position extending through described treatment instrument;

The 2nd treatment instrument maintaining part, it is arranged on described treatment instrument and lifts on the seat, runs through with described the 2nd treatment instrument in the passage and remains on 2nd position different with the 1st position extending through described treatment instrument;

Be maintained fixed the unit, it is separately positioned on described treatment instrument and lifts on seat and the described fixed part, be used for lifted by this treatment instrument that described the 1st treatment instrument that lifts of seat is clamped in that this treatment instrument lifts and this fixed part between; And

Guide portion, it is arranged on the described fixed part, will not follow described treatment instrument to lift the rotational action of seat and described the 2nd treatment instrument that lifts to the described unit guides that is maintained fixed, and will follow described treatment instrument to lift the rotational action of seat and described the 1st treatment instrument that lifts to the described unit guides that is maintained fixed of this fixed part.

10. endoscope as claimed in claim 9 is characterized in that,

The described unit that is maintained fixed of described fixed part is configured in the following plane: comprise described the 1st treatment instrument maintaining part and follow described treatment instrument to lift the rotational action of seat and in the plane of mobile track plane.

11. endoscope as claimed in claim 9 is characterized in that,

Described guide portion is formed in inclined-plane or the curved surface on the described fixed part.

12. endoscope as claimed in claim 10 is characterized in that,

Described guide portion is formed in inclined-plane or the curved surface on the described fixed part.

13. endoscope as claimed in claim 9 is characterized in that,

Described the 1st treatment instrument is that external diameter is the following seal wire of predetermined diameter,

Described the 2nd treatment instrument is the external diameter treatment instrument bigger than predetermined diameter.

14. endoscope as claimed in claim 9 is characterized in that,

Described treatment instrument lifts seat to have and extends through described treatment instrument and run through bearing surface with the described the 1st or the 2nd treatment instrument butt in the passage,

On this bearing surface, be formed with and lift a side guide, this lifts a side guide and follows described treatment instrument to lift the rotational action of seat, described the 1st treatment instrument butt remained on described the 1st position, described the 2nd treatment instrument butt to be remained on the mode channeling conduct of described the 2nd position.

15. endoscope as claimed in claim 9 is characterized in that,

Described the 1st treatment instrument maintaining part has the wall portion that described the 1st treatment instrument is hooked of being used for.

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