United States Patent (19)
`Utsugi
`
`11
`45)
`
`4,452,236
`Jul. 5, 1984
`
`54 ENDOSCOPE WITH A RESILIENT RAISING
`MEMBER
`Mikio Utsugi, Tokyo, Japan
`75) Inventor:
`73) Assignee:
`Olympus Optical Co., Ltd., Tokyo,
`Japan
`21 Appl. No.: 375,990
`22 Filed:
`May 7, 1982
`30
`Foreign Application Priority Data
`May 14, 1981 JP
`Japan .................................. 56-72739
`51) Int. Cl. ................................................ A61B 1/00
`52 U.S. Cl. ........................................................ 128/4
`58. Field of Search ......................................... 128/4-8
`56)
`References Cited
`U.S. PATENT DOCUMENTS
`3,561,432 2/1971 Yamaki ................................... 128/6
`
`3,896,793 7/1975 Mitsui et al. ............................ 128/6
`3,924,608 12/1975 Mitsui ............
`4,190,041 2/1980 Chikama ................................. 128/4
`Primary Examiner-Edward M. Coven
`Assistant Examiner-Max F. Hindenburg
`57
`ABSTRACT
`An elastic raising member is disposed in a raising mem
`ber housing provided at the distal end of an insertion
`section of an endoscope and has one end of which is
`supported by the housing and the other end of which is
`a free end. When the free end is pulled by a control wire
`extending along the insertion section by operating a
`control unit, the raising member changes the guiding
`direction of a treatment tool. When the free end is re
`leased, the raising member is restored to a lying position
`by its elasticity.
`
`8 Claims, 10 Drawing Figures
`
`
`
`COOK
`Exhibit 1014-0001
`
`

`

`U.S. Patent Jun. 5, 1984
`
`Sheet 1 of 4
`
`4,452,236
`
`^????????????
`
`| 9 | -! 9
`
`
`
`
`
`
`
`
`
`COOK
`Exhibit 1014-0002
`
`

`

`U.S. Patent Jun. 5, 1984
`
`Sheet 2 of 4
`
`4,452,236
`
`
`
`COOK
`Exhibit 1014-0003
`
`

`

`U.S. Patent Jun. 5, 1984
`F G. 6
`
`
`
`Sheet 3 of 4
`
`4,452,236
`
`COOK
`Exhibit 1014-0004
`
`

`

`U.S. Patent Jun. 5, 1984
`
`Sheet 4 of 4
`
`4,452,236
`
`F G. O
`
`
`
`- OADING
`
`-- UNLOADING
`
`PERCENTAGE OF ELONGATION
`(RELATIVE VALUE)
`
`COOK
`Exhibit 1014-0005
`
`

`

`1.
`ENDOSCOPE WITH A RESILIENT RAISING
`MEMBER
`
`5
`
`10
`
`15
`
`BACKGROUND OF THE INVENTION
`The present invention relates to an endoscope having
`a treatment tool guide section.
`A conventional endoscope has a channel for inserting
`and guiding a treatment tool such as a forceps there
`through. A guide unit for guiding the tool is disposed at
`the opening of the channel. Referring to FIG. 1, this
`unit has a raising lever housing 2 in a distal end assembly
`1 of the endoscope. A raising lever 3 is pivotal about a
`shaft 4 in the raising lever housing 2, as shown in FIG.
`1. A control wire 5 connected to the raising lever 3 is
`pulled or pushed to change a raising angle of the raising
`lever 3. Thus, a treatment tool 6 is arbitrarily oriented at
`a desired angle.
`In the conventional device of this type, the raising
`lever 3 is pivoted by strongly pulling the control wire 5.
`20
`The raising lever 3 returns to the lying position by push
`ing the control wire 3. However, the force applied to
`the direction to push the control wire 5 is hard to be
`transmitted, preventing smooth pushing of the control
`wire 5. Especially, when contamination causes clogging
`25
`at the shaft 4 or a wire insertion hole 7, the raising level
`3 may not return to the lying position. Further, since the
`raising lever 3 has a predetermined shape and is not
`flexible, a portion 6a which is sharply bent is formed
`when a raising angle is increased. The treatment tool 6.
`30
`is often broken at the portion 6a. The raising lever be
`comes thick and the distal end portion becomes large in
`the conventional endoscope.
`SUMMARY OF THE INVENTION
`It is, therefore, an object of the present invention to
`provide an endoscope which is capable of properly
`returning a raising member to a non-pulling position
`when the raising member is not pulled by a control
`wire, which is capable of preventing sharp bending of a
`treatment tool and smoothly guiding the treatment tool
`even if a raising angle is increased, and which has a
`small distal end portion having the raising member
`therein.
`In order to achieve the above object of the present
`invention, there is provided an endoscope comprising:
`an elongated insertion section which has a distal end
`portion to be inserted into a body cavity with a raising
`member housing open to the outside, a proximal end
`portion to be located outside the body cavity, a longitu
`dinal axis extending from said proximal end portion to
`said distal end portion, and a treatment tool insertion
`channel extending from said proximal end portion to
`said distal end portion along said axis and communicat
`ing with said raising member housing; a control section
`55
`connected to said proximal end portion of said insertion
`section and having a treatment tool insertion inlet port
`which communicates with said treatment tool insertion
`channel; an elastic raising member having an acting
`portion and a supported portion and adapted to change
`a guiding direction of the treatment tool as the acting
`portion pushes the intermediate portion of the tool and
`raises the same to a desired position, said supported
`portion being supported by part of said distalend assem
`bly, said acting portion being movable between raised
`65
`and laid positions and so that said raising member by
`itself is resiliently returned to the laid position after it is
`raised; a control wire one end of which is connected to
`
`4,452,236
`2
`said acting portion of said raising member, the other end
`of which reaches said control section, and which is
`inserted in said insertion section along said axis; and a
`traction control unit, provided in said control section
`and connected to said control wire, for raising said
`raising member to change the guiding direction of the
`treatment tool.
`BRIEF DESCRIPTION OF THE DRAWINGS
`FIG. 1 is a side sectional view of a treatment tool
`guide unit used in a conventional endoscope;
`FIG. 2 is a side sectional view of a control section of
`an endoscope and a portion in the vicinity of a proximal
`end portion of an insertion section of the endoscope
`according to one embodiment of the present invention;
`FIG. 3 is a side sectional view of a portion in the
`vicinity of a distal end portion of the insertion section of
`the endoscope shown in FIG. 2;
`FIG. 4 is a perspective view of the distal end portion
`of the endoscope shown in FIG. 2;
`FIG. 5 is a perspective view of the distal end portion
`which is partially cut along the line IV-IV in FIG. 4;
`FIG. 6 is a perspective view of a raising member of
`the endoscope shown in FIG. 2;
`FIGS. 7 to 9 are perspective views of raising mem
`bers according to second to fourth embodiments of the
`present invention, respectively; and
`FIG. 10 is a graph for explaining the elongation of an
`ultraelastic alloy as a function of an external stress.
`DETAILED DESCRIPTION OF THE
`PREFERRED EMBODIMENTS
`r: Referring to FIG. 2, a control section 11 of an endo
`scope has a control section main body lia. The control
`section main body 11a has an eyepiece section 13 having
`an eyepiece optical system 12 and a treatment tool inser
`tion inlet port 14. One end of a universal cord 15 is
`connected to the control section main body 11a. The
`other end of the universal cord 15 has a connector (not
`shown) which is connected to a light source unit (not
`shown). A proximal end portion of an elongated inser
`tion section 16 is connected to the control section main
`body 11a. The insertion section 16 comprises a flexible
`tube 17, a bending tube 18 and a distal end assembly 19.
`The bending tube 18 is disposed between the distal end
`of the flexible tube 17 and the proximal end of the distal
`end assembly 19. The bending tube 18 is remote-con
`trolled by a control knob (not shown) which is disposed
`in the control section 11. The distal end assembly 19 and
`part of the insertion section 16 near the distal end assem
`bly 19 constitute a distal end portion of the insertion
`section 16 to be inserted in a body cavity. In the above
`embodiment, the parts of the bending tube 18 and the
`flexible tube 17 which are on the distal end portion are
`inserted in the body cavity. A proximal end portion of
`the flexible tube 17 which is positioned outside the body
`cavity during examination constitutes a proximal end
`portion. As shown in FIGS. 2 and 3, a longitudinal axis
`X of the insertion section 16 extends from the proximal
`end portion to the distal end portion. An observation
`window 21, an illumination window 22 and an air/wa
`ter supply nozzle 23 oriented toward the outer surface
`of the observation window 21 are disposed on one side
`surface of the distal end assembly 19, as shown in FIG.
`4. The distal end of an image guide 24 (FIG. 2) using
`optical fibers is optically connected to the observation
`window 21. The image guide 24 is inserted in the inser
`
`35
`
`45
`
`50
`
`COOK
`Exhibit 1014-0006
`
`

`

`O
`
`15
`
`4,452,236
`4.
`3
`is bent upwards and takes a raised position as indicated
`tion section 16 along the axis X thereof. The proximal
`by the solid line in FIG. 3. When it is not pulled, the
`end of the image guide 24 extends into the control sec
`raising member 32 is slightly bent and lies in a laid posi
`tion 11 and is optically connected to the eyepiece opti
`tion as indicated by the alternate long and two dashed
`cal system 12. Further, the distal end of a light guide
`(not shown) using optical fibers is optically connected
`line in FIG. 3. A stainless steel plate of 0.03 to 0.5 mm
`thickness is generally used as the material of the raising
`to the illumination window 22. The proximal end of the
`member 32. An ultraelastic alloy is preferred. The ultra
`light guide is connected to the connector of the univer
`elastic alloy has such an ultraelasticity as will be de
`sal cord 15 through the insertion section 16, the control
`scribed below. It is often called "pseudo-elasticity al
`section main body 11a, and the universal cord 15. When
`loy'. A Ti-Ni type alloy is one of the ultraelastic alloys.
`the connector is connected to a light source unit, this
`When a load is increasingly applied to a material, yield
`light guide is optically connected to a light source (not
`ing occurs after linear elastic deformation. In other
`shown) of the light source unit. Thus, the illumination
`words, apparent plastic deformation occurs. When the
`window receives illumination light. The illumination
`light transmitted through the light guide emerges from
`load is eliminated from the material, distortion is also
`eliminated. As a result, the metal of this type can be
`the illumination window 22 toward the field of sight in
`repeatedly used as a spring in a range wider than other
`the body cavity.
`metal materials (FIG. 10). The apparent plastic defor
`As shown in FIG. 3, a raising member housing 26
`having a guide port 25 open to the field of the sight of
`mation described above occurs by the martensite trans
`formation by the stress. The distortion is eliminated by
`the observation window 21 is formed at a main body
`19a of the distal end assembly 19. The raising member
`the reverse transformation when the load is eliminated
`20
`from the metal. The distortion range within which the
`housing 26 communicates with a treatment tool outlet
`metal may be repeatedly used as the spring varies in
`port 28 of the treatment tool insertion channel 27.
`The channel 27 extends through the flexible tube 17,
`accordance with a ratio of constituents of the metal. A
`metal having an elongation percentage of about 6% can
`the bending tube 18 and the distal end assembly 19 along
`be used.
`the axis X of the insertion section 16 and communicates
`25
`A pair of stoppers 42 located on the side of the outlet
`with the treatment tool insertion port 14 of the control
`port 28 of the channel 27 are formed in the raising mem
`section 11. Part of the channel 27 which extends in the
`ber housing 26. When the raising member 32 is bent, the
`flexible tube 17 and the bending tube 18 is formed by a
`pair of stoppers 42 gradually comes in contact with both
`flexible tube 29 and connecting tubes 30a and 30b. A
`side edges 32a of the regulating surface of the raising
`treatment tool 31 is inserted from the treatment tool
`30
`member 32 from its one end to the other end so that the
`insertion port 14 and is guided into the channel 27. The
`raising member 32 is positioned at a desired position.
`channel 27 then guides the treatment tool 31 to the
`Further, when the raising member 32 is bent at maxi
`raising member housing 26. The treatment tool 31 varies
`mum, the regulating surface of the raising member 32 is
`in accordance with a specific therapy. Typical examples
`completely in tight contact with the stoppers 42. Thus,
`of the treatment tools are a forceps and a tube for a
`35
`the pair of stoppers 42 has substantially an arcuated
`contrast agent. The tube for a contrast agent is illus
`shape to bend the treatment tool 32 optimally.
`trated in the figure.
`As shown in FIG. 5, a U-shaped groove 43 is formed
`A raising member 32 is disposed in the raising mem
`in the end wall of the raising member housing 26 at the
`ber housing 26 to change the direction of the treatment
`side of the channel 27 and between the pair of stoppers
`tool 31 extending from the guide port 25. The raising
`42. The center of the groove 43 is substantially arcuated
`member 32 is oriented from the outlet port 28 of the
`along the surfaces of the pair of stoppers 42.
`channel 27 to the guide port 25. The raising member 32
`The depth of the groove 43 from the upper surfaces
`is formed by an elongate plate comprising an ultraelastic
`of the stoppers 42 substantially corresponds to the inner
`member such as an elastic alloy. As shown in FIG. 6,
`diameter of the treatment tool outlet port 28. Therefore,
`one edge 33 of the raising member 32 is bent perpendic
`when the raising member 32 is bent at maximum and is
`ularly and the other edge is curled in the same direction
`in tight contact with the stoppers 42, a treatment tool
`of one edge 33 to form a fulcrum portion 34. One end 36
`path having the same width as that of the treatment tool
`of an L-shaped rigid pin 35 is rotatably fitted in the
`outlet port 28 is formed between the raising member 32
`fulcrum portion 34. An end of a metal control wire 38 is
`and the groove 43.
`connected to the other end 37 of the raising member 32.
`The control wire 38 is connected to the projecting
`Part of the pin 35 is notched and the other end 37 of the
`end of the free end 41 of the raising member 32 through
`pin 35 is located at the notched part of the raising mem
`the pin 35. Since the pin 35 which comprises a highly
`ber 32. The other end 37 of the pin 35 is mounted with
`rigid material is bent in an L shape, the side to which the
`a sufficient space within the width of the raising mem
`control wire 38 is connected may not be bent more than
`ber 32. One edge 33 of the raising member 32 is fitted in
`55
`the other side when the control wire 38 is pulled
`a groove 39 formed on the bottom wall of the raising
`strongly. Both sides of the raising member 32 are thus
`member housing 26 in the vicinity of the outlet port 28
`uniformly bent.
`of the channel 27. The edge 33 of the raising member 32
`The other end of the control wire 38 is guided to the
`defines a supported portion. Thus, the edge 33 of the
`control section 11 through a wire insertion hole 44. The
`raising member 32 is inserted in the groove 39 at part of
`60
`wire insertion hole 44 is formed by wire guide tubes
`the housing 26 and is supported thereby. The other edge
`45a, 45b and 45c.
`of the raising member 32 is constituted as a free end 41.
`An acting portion comprising a smooth surface of the
`The other end of the control wire 38 is connected to
`a traction control unit 46 disposed in the control section
`free end 41 is disposed perpendicularly to the outlet
`11. The traction control unit 46 comprises a rack 47
`port 28 of the channel 27.
`disposed in the control section main body 11a and a
`As described above, the raising member 32 comprises
`pinion gear 48 meshed therewith. The control wire 38 is
`a plate-shaped elastic material. However, when it is
`connected to the rack 47.
`pulled by the controlled wire 38, the raising member 32
`
`50
`
`65
`
`COOK
`Exhibit 1014-0007
`
`

`

`O
`
`15
`
`4,452,236
`5
`6
`The rack 47 is movably mounted in a cylinder 49.
`be pushed strongly to restore the original shape. The
`When the pinion gear 48 is rotated by a control lever 51
`control wire is only loosened or may be slightly pushed
`disposed outside of the control section 11, the position
`by the weak force to automatically restore the raising
`member 32 to the lying position easily.
`of the rack 47 is controlled along the axis X of the inser
`Even when the control wire 38 is not pulled, the
`tion section 16.
`A packing 52 is mounted at the outer periphery of the
`raising member 32 is properly restored to the original
`position, improving the operability of the endoscope.
`rack 47 on the side of the control wire 38 to liquid
`tightly seal a cylinder chamber 49a of the cylinder 49
`Further, since the control wire 38 need not be pushed,
`from the side of the wire insertion hole 44. A cleaning
`the control wire 38 may be smaller to assure a wider gap
`liquid inlet port 53 is formed in the cylinder chamber
`between the control wire 38 and the wire insertion hole
`49a so that the cleaning liquid inlet port 53 communi
`44. Therefore, the cleaning liquid flows smoothly, in
`creasing the cleaning efficiency.
`cates with the cylinder 49. A gap is formed between the
`Further, since a rotary member such as a shaft is not
`wire insertion hole 44 and the control wire 38 to allow
`flow of the cleaning liquid.
`used for the raising member 32 and the raising member
`The mode of the operation of the endoscope accord
`32 is fixed at the distal end assembly 19, movement of
`the raising member 32 may not be prevented by deposi
`ing to the first embodiment of the present invention will
`tion of contamination and is moved smoothly.
`be described.
`Further, since the raising member 32 is thinner, it can
`The treatment tool 31 is inserted from the treatment
`tool inlet port 14. When the treatment tool 31 is guided
`be stored in a small raising member housing 26. There
`through the treatment tool outlet port 28, the user
`fore, the outer diameter and the axial length of the distal
`20
`end assembly 19 are decreased, resulting in a compact
`should not pull the control wire 38. In the condition in
`distal end assembly 19. As opposed to the conventional
`which the raising member 32 lies as shown in the alter
`complicated raising member manufactured by milling,
`nate long and two dashed line in FIG. 3, the user must
`the raising member 32 does not require complex proce
`push the treatment tool 31 into the treatment tool inser
`dure, resulting in low cost and easy manufacture.
`tion channel 27. The distal end of the treatment tool 31
`slides on the surface of the acting portion of the raising
`Further, when the ultraelastic alloy is used as the
`member of the raising member housing 26 and projects
`material of the raising member 32, plastic deformation
`into the body cavity through the delivery port 25.
`does not occur within the elongation range of, for exam
`ple 6%. Thus, the treatment tool 31 is properly bent
`When the dista end of the treatment tool 31 comes in
`the field of sight for the observation window 21, the
`with a small curvature. This metal can maintain its elas
`ticity over a long period of time. For example, a Ti-Ni
`user controls the traction control unit 46 to pull the
`type alloy as the ultraelastic alloy has an excellent resis
`control wire 38. The free end 41 of the raising member
`tance to a cleaning/disinfection liquid and to acids such
`32 is bent and raised. Then, the treatment tool 31 is bent
`as gastric juice. Further, this alloy is nontoxic to the
`and oriented toward a desired direction. Thus, with a
`change in an angle of the raising member 32, the user
`human body,
`35
`controls to position the treatment tool 31 at a desired
`The control wire 38 is not limited to a metal one. For
`angle.
`example, a solid wire or strand may be used.
`FIG. 7 shows a raising member of the endoscope
`If the user wishes to bend the treatment tool 31 at
`according to a second embodiment of the present inven
`maximum, he pulls the control wire 38 strongly so that
`tion. The material and the like of the raising member in
`the both side edges 32a of the raising member 32 are
`brought into tight contact with the stoppers 42. There
`the second embodiment are substantially the same as
`those in the first embodiment except that a groove 61 is
`fore, the raising member 32 is bent with a proper curva
`formed to guide the treatment tool smoothly on the
`ture along the arcuated surface of the stoppers 42. The
`treatment tool path having substantially the same width
`surface which extends from one end to the other end
`(insertion direction of the treatment tool) and which
`as the treatment tool outlet port 28 is formed between
`45
`opposes the treatment tool outlet port 28 of the channel
`the raising member 32 and the groove 43. Even if the
`27. The treatment tool 31 is guided on the groove 61, so
`raising member is bent at maximum, the treatment tool
`31 is smoothly inserted along the raising member 32 and
`that the treatment tool 31 does not deviate from the
`predetermined route nor swing in a direction perpendic
`part of the treatment tool 31 may not be sharply bent,
`ular to the groove 61. Thus, guiding operation is further
`preventing damage of the treatment tool 31.
`improved.
`If the user wishes to release bending of the treatment
`FIG. 8 shows a raising member of the endoscope
`tool 31, he releases traction force by the traction control
`according to a third embodiment of the present inven
`unit 46. The control wire 38 is naturally loosened. Sub
`sequently, the raising member 32 returns to the position
`tion. The raising member 32 has a guide member 72
`by its elasticity, as indicated by the alternate long and
`with a recess 71 formed on the free end 41 of an elastic
`55
`plate member 32a to guide the treatment tool. This
`two dashed line in FIG. 3. The treatment tool 31 re
`guide member 72 which comprises a metal or synthetic
`stores its original shape by itself.
`The cleaning liquid is supplied to the cylinder cham
`resin also has the same function as the groove 61. A
`means for fixing the supported portion of the raising
`ber 49a through the cleaning liquid inlet port 53. Fur
`ther, the cleaning liquid is supplied to the raising mem
`member 32 to the distal end assembly 19a may be rivets
`73, screws or caulkings, as shown in FIG. 8.
`ber housing 26 through the wire insertion hole 44. Con
`FIG. 9 shows a raising member of the endoscope
`tamination causing clogging in the wire insertion hole
`according to a fourth embodiment of the present inven
`44 or the like is washed off, allowing smooth movement
`tion. Elastic metal wires 82 are embedded in a raising
`of the control wire 38. If a disinfection liquid is used in
`member main body 81 made of a soft and flexible syn
`place of the cleaning liquid, the wire insertion hole 44
`thetic resin. The metal wires 82 extend from one edge
`and the control wire 38 can be disinfected.
`33 of the main body 81 to the other edge 81a of the main
`In the above embodiment, since the elastic member is
`body 81. A fluorine type synthetic resin or the like
`used as the raising member 32, the control wire need not
`
`30
`
`50
`
`COOK
`Exhibit 1014-0008
`
`

`

`4,452,236
`7
`3.
`which has a low friction coefficient may be used as the
`Serted in said insertion section along said axis; and a
`material of the raising member main body 81 to guide
`traction control unit, provided in said control section
`the treatment tool smoother.
`and connected to said control wire, for raising said
`In order to use the raising members shown in FIGS.
`raising member to change the guiding direction of the
`7 to 9 in the same manner as that shown in FIG. 5, a
`treatment tool.
`2. An endoscope according to claim 1, wherein said
`notched portion (not shown) for positioning the control
`wire 38 of the pin 35 freely is formed in the stoppers 42.
`raising member is made of an ultraelastic alloy.
`The control wire 38 is preferably guided through the
`3. An endoscope according to claim 2, wherein said
`notched portion. With the above arrangement, when
`ultraelastic alloy is a Ti-Ni type alloy.
`the raising member 32 is raised at maximum, the pin 35 10
`4. An endoscope according to claim , wherein said
`acting portion of said raising member has a groove
`is fitted in the notched portion and does not interfere:
`with the raising operation.
`formed therein to guide the treatment tool along the
`Since the raising member 32 need only have elastic
`insertion direction of the treatment tool.
`ity, it may not be formed by a metal. A synthetic resin
`5. An endoscope according to claim 1, wherein said
`such as a nylon, a polycarbonate, a hard rubber may
`elastic plate constitutes the supported portion and a
`15
`also be used to form a single member which is formed in
`rigid member attached to the elastic plate constitutes
`the acting portion of said raising member.
`the same shape as shown in FIGS. 6 to 9.
`The thickness of the raising member 32 may not be
`6. An endoscope according to claim 1, wherein a
`uniform over the entire length. For example, the thick
`stopper is formed in said raising member housing and
`ness of the raising member 32 may be changed so as to
`comes in contact with said raising member to define the
`20
`obtain an accurately arcuated shape.
`guiding direction of the treatment tool when said raisin
`According to the present invention, the control wire
`member is raised to the raised position.
`need not be pushed to cause the raising member to
`7. An endoscope according to claim 1, wherein said
`restore the original lying shape. The control wire is
`raising member is made of an elastic synthetic resin
`plate.
`only released for this purpose. Further, in accordance
`8. An endoscope comprising: an elongated insertion
`with traction of the control wire, the raising member is
`bent so that part of the treatment tool may not be
`section which has a distal end portion to be inserted into
`a body cavity with a raising member housing open to
`sharply bent, resulting in smooth insertion of the treat
`ment tool. The raising member may be made of a plate
`the outside, a proximal end portion to be located outside
`the body cavity, a longitudinal axis extending from said
`having a small thickness as needed. Therefore, the rais
`30
`proximal end portion to said distal end portion, and a
`ing member can be stored in a small raising member
`housing, resulting in a compact distal end assembly.
`treatment tool insertion channel extending from said
`proximal end portion to said distal end portion along
`What is claimed is:
`1. An endoscope comprising: an elongated insertion
`said axis and communicating with said raising member
`housing; a control section connected to said proximal
`section which has a distal end portion to be inserted into
`a body cavity with a raising member housing open to
`end portion of said insertion section and having a treat
`the outside, a proximal end portion to be located outside
`ment tool insertion inlet port which communicates with
`the body cavity, a longitudinal axis extending from said
`said treatment tool insertion channel; a resilient raising
`proximal end portion to said distal end portion, and a
`member positioned in said raising member housing and
`having an acting portion and a supported portion and
`treatment tool insertion channel extending from said
`proximal end portion to said distal end portion along
`adapted to change a guiding direction of a treatment
`tool as the acting portion pushes an intermediate por
`said axis and communicating with said raising member
`housing; a control section connected to said proximal
`tion of the tool and raises the same to a desired position,
`said raising member including a main body made of a
`end portion of said insertion section and having a treat
`flexible synthetic resin and an elongate elastic metal
`ment tool insertion inlet port which communicates with
`45
`member embedded in said main body and extending to
`said treatment tool insertion channel; a resilient raising
`the acting portion from the supported portion, said
`member which includes an elastic plate positioned in
`supported portion being supported by part of said distal
`said raising member housing and having an acting por
`tion and a supported portion and adapted to change a
`end portion of the elongated insertion section, said act
`ing portion being movable between raised and lowered
`guiding direction of a treatment tool as the acting por
`50
`positions so that said raising member by itself is resil
`tion pushes an intermediate portion of the tool and
`iently returned to the lowered position after being
`raises the same to a desired position, said supported
`portion being supported by part of said distal end por
`raised; a control wire, one end of which is connected to
`said acting portion of said raising member, the other end
`tion of the elongated insertion section, said acting por
`tion being movable between raised and lowered posi
`of which reaches said control section, and a traction
`55
`control unit, provided in said control section and con
`tions so that said raising member by itself is resiliently
`nected to said control wire, for raising said raising nem
`returned to the lowered position after being raised; a
`ber to change the guiding direction of the treatment
`control wire, one end of which is connected to said
`acting portion of said raising member, the other end of
`tool.
`which reaches said control section, and which is in
`60
`
`35
`
`25
`
`65
`
`s:
`
`k
`
`k
`
`s:
`
`COOK
`Exhibit 1014-0009
`
`