JP2009183546A - Separable endoscope - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a separable endoscope for which an outer tube can be appropriately arranged. <P>SOLUTION: The sheath part of the separable endoscope has a flow path displacement part provided on the proximal end part of a cover and provided with: inner side connection parts 78a, 78b and 78c which are provided on the distal end side of the flow path displacement part and to which the proximal end parts of inner tubes 47a, 47b and 47c are connected; outer side connection parts 82a, 82b and 82c which are provided on the proximal end side of the flow path displacement part and to which the distal end parts of outer tubes 63a, 63b and 63c are connected; and flow paths 84a, 84b and 84c communicating the inner side connection parts 78a, 78b and 78c and the outer side connection parts 82a, 82b and 82c. The inner side connection parts 78a, 78b and 78c and the outer side connection parts 82a, 82b and 82c are disposed at positions different from each other with respect to a circumferential direction centering on the longitudinal axis of the sheath part. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a separation-type endoscope in which a sheath part can be attached to and detached from a main body part by inserting and removing a built-in part of the main body part from a cover of the sheath part.

Patent Document 1 discloses a cover-type endoscope. In this cover-type endoscope, the endoscope for the cover is covered with the endoscope cover. In the endoscope for a cover, an operation portion that is held and operated by an operator is connected to a proximal end portion of an elongated insertion tube that is inserted into a body cavity. On the other hand, the endoscope cover has a cylindrical insertion tube cover through which the insertion tube of the cover endoscope is inserted. The insertion tube cover is inserted with an inner tube that is used for both treatment instrument insertion and suction. The proximal end portion of the insertion tube cover is provided with a proximal end portion, and the proximal end portion of the inner tube is connected to the distal end surface of the proximal end portion. A forceps insertion port is formed on the side surface of the hand mouth body, and a suction outer tube is connected to the proximal end surface of the hand mouth body. The inner tube, the forceps insertion opening, and the outer tube are communicated with each other through a channel extending in the proximal mouth body. That is, the channel is branched by extending from the connection position of the inner tube on the distal end surface of the proximal mouth portion to the proximal end side, and one branched end portion is extended to the forceps insertion opening on the side surface portion The branch end of the tube extends to the connection position of the outer tube on the base end surface.
JP-A-8-19510

  Patent Document 1 does not disclose or suggest any appropriate arrangement of the outer tube by displacing the connection position of the outer tube with respect to the connection position of the inner tube in the hand mouth part. .

  The present invention has been made paying attention to the above problems, and an object of the present invention is to provide a separation type endoscope in which an outer tube can be appropriately arranged.

  In the first embodiment of the present invention, the separable endoscope includes a main body portion and a sheath portion that can be attached to and detached from the main body portion, and the main body portion has an elongated built-in portion that includes a distal end portion and a proximal end portion. And an operation part that is connected to a base end part of the built-in part and is held and operated by an operator, and the sheath part is a cylindrical cover body through which the built-in part is inserted, and the cover A cover provided with a cover tip provided at the tip of the main body and having an opening, and an inner tube inserted through the cover, the tip of the inner tube being connected to the opening, An inner tube extending from a distal end portion of the cover to a proximal end portion, an outer tube extending from the proximal end portion of the cover, and a flow path displacement portion provided at the proximal end portion of the cover, A base of the inner tube provided on the distal end side of the flow path displacement portion. The inner connection portion to which the portion is connected, the outer connection portion provided on the proximal end side of the flow path displacement portion and connected to the distal end portion of the outer tube, and the inner connection portion and the outer connection portion communicating with each other A flow path displacement portion including a flow path, and the inner connection portion and the outer connection portion are arranged at different positions in the circumferential direction around the longitudinal axis of the sheath portion. It is characterized by that.

  In a second embodiment of the present invention, the separation type endoscope is characterized in that the flow path extends along an orthogonal plane orthogonal to the longitudinal axis of the sheath portion.

  In the third embodiment of the present invention, in the separation-type endoscope, the sheath portion includes first and second inner tubes and first and second outer tubes, and the flow path displacement portion. The first and second inner connecting portions to which the base end portions of the first and second inner tubes are connected, respectively, and the first and second inner connecting portions to which the distal end portions of the first and second outer tubes are connected, respectively. 1 and a second outer connecting portion, wherein the first outer connecting portion and the second outer connecting portion are more than the first inner connecting portion and the second inner connecting portion. It is characterized by being arranged close together.

  According to a fourth embodiment of the present invention, in the separation type endoscope, the sheath portion is provided at a proximal end portion of the cover, and has a connecting portion that is movable with respect to the cover in the longitudinal axis direction of the cover. The connecting portion includes an insertion hole through which the built-in portion is inserted into the cover main body, and the flow path displacement portion provided around the insertion hole, and the built-in portion is attached to the cover. It has a guide part guided by the inner tube when the built-in part is inserted.

  In the separation type endoscope according to the first embodiment of the present invention, the position of the distal end portion of the outer tube can be arbitrarily set regardless of the position of the proximal end portion of the inner tube by using the flow path displacement portion. It is possible to arrange the outer tube appropriately.

  In the separation type endoscope according to the second embodiment of the present invention, since the flow path extends along an orthogonal plane orthogonal to the longitudinal axis of the sheath portion, the inner tube base is formed using a compact flow path displacement portion. It is possible to sufficiently displace the position of the end portion and the position of the distal end portion of the outer tube.

  In the separation type endoscope according to the third embodiment of the present invention, the first outer tube and the second outer tube are collectively extended from the base end portion of the cover, so that a suitable arrangement of the outer tube is realized. Has been.

  In the separation type endoscope according to the fourth embodiment of the present invention, the inner tube can be pulled to remove the slack by moving the connecting portion toward the base end side with respect to the cover, and the built-in portion in the cover main body. When inserting the guide, the guide portion of the built-in portion can be smoothly and reliably guided by the inner tube.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  With reference to FIGS. 1 to 3, a schematic configuration of the main body portion 21 of the separation type endoscope will be described. The main body unit 21 is a reuse unit that is used repeatedly.

  An observation unit 23 is disposed at the tip of the main body 21. The observation unit 23 is formed of an illumination unit that illuminates an observation target and an imaging unit that captures an observation image. An electric cable 24 extends from the observation unit 23 and extends to the proximal end side. The electric cable 24 is formed from various signal lines for transmitting a drive signal for driving the observation unit 23 and an image signal obtained by the observation unit 23. A bending portion 26 is continuously provided on the proximal end side of the observation unit 23. In the bending portion 26, a large number of short columnar node rings 27 are connected to a coaxial shaft so as to be rotatable with respect to each other. The distal end portions of a plurality of operation wires 29 for bending the bending portion 26 are connected to the most advanced node ring 27. The operation wire 29 is inserted into a tubular wire guide 30 so as to be able to advance and retreat, and the operation wire 29 and the wire guide 30 are extended to the proximal end side. Each node ring 27 is formed with a cable insertion hole 32 through which the electric cable 24 is inserted and a wire guide insertion hole 34 through which the wire guide 30 is fitted and inserted in the axial direction. The electric cable 24 and the wire guide 30 extend through the bending portion 26, extend from the proximal end portion of the bending portion 26, and extend toward the proximal end side of the main body portion 21.

  As described above, in this embodiment, the observation unit 23, the large number of node rings 27, the electric cable 24, the operation wire 29, and the wire guide 30 form a built-in portion 36 built in the sheath portion 22.

  The base end portion of the main body portion 21 forms an operation portion 31, and the electric cable 24, the operation wire 29, and the wire guide 30 are introduced from the distal end portion of the operation portion 31 into the operation portion housing 37. The operation portion housing 37 has a rectangular parallelepiped shape and extends from the distal end side to the proximal end side. In the operation portion housing 37, a bending operation knob 38 is disposed on one side base end portion in the lateral direction orthogonal to the longitudinal axis direction. By rotating the bending operation knob 38, the operation wire 29 is advanced and retracted, and the bending portion 26 is bent. Further, in the operation unit housing 37, various operation switches 39 for observation, air supply, water supply, and the like are disposed at the top base end portion in the vertical direction orthogonal to the longitudinal axis direction and the horizontal direction. And the universal cord 41 is extended from the other side base end part of the horizontal direction. A signal line from the electric cable 24 and the operation switch 39 is inserted into the universal cord 41. The universal cord 41 is connected to a video processor for observation operation, an air / water supply device for air / water supply operation, a suction device for suction operation, and the like.

  A schematic configuration of the sheath portion 22 of the separation type endoscope will be described with reference to FIGS. 1 to 4. The sheath portion is a disposable portion that is made disposable.

  A sheath insertion portion 42 as a cover is formed on the distal end side of the sheath portion 22. A sheath distal end portion 43 as a cover distal end portion is disposed at the distal end portion of the sheath insertion portion 42. An observation window 44 is covered on the distal end surface portion of the sheath distal end portion 43. The observation unit 23 of the main body 21 is disposed on the proximal end side of the observation window 44, and observation is performed by the observation unit 23 through the observation window 44. An air supply nozzle 46 a and a water supply nozzle 46 b serving as openings facing the observation window 44 are disposed on the distal end surface of the sheath distal end portion 43. Further, a channel opening 46c is formed in the sheath distal end portion 43 as an opening portion that is used for both suction and treatment instrument protrusion. Here, the observation window 44, the air supply nozzle 46 a, the channel opening 46 c, and the water supply nozzle 46 b are arranged at substantially equal intervals in the circumferential direction around the central axis of the sheath portion 22. A sheath bending portion 48 is continuously provided on the proximal end side of the sheath distal end portion 43. In the sheath bending portion 48, a large number of cylindrical sheath nodes 49 are coaxially connected to each other, and a large number of sheath nodes 49 are covered with a flexible rubber tube 52. In this way, the sheath bending tube 51 is formed by the sheath node ring 49 and the rubber tube 52. On the proximal end side of the sheath bending portion 48, a serpentine tube portion 53 is continuously provided. The snake tube portion 53 is formed of a long and flexible snake tube 54. In the present embodiment, the cover main body is formed by the sheath bending tube 51 and the snake tube 54. Further, a connection receiving portion 56 is connected to the proximal end portion of the serpentine tube portion 53, and a connection portion 62 is connected to the proximal end portion of the connection receiving portion 56.

  The inner ends of the air supply nozzle 46a, the water supply nozzle 46b, and the channel opening 46c are connected to the distal ends of the air supply inner tube 47a, the water supply inner tube 47b, and the channel inner tube 47c. Each inner tube 47 a, 47 b, 47 c is inserted into the sheath bending tube 51 and the snake tube 54 and introduced into the connection receiving portion 56. In the connection receiving part 56, the branch pipe part 57 is arrange | positioned at the base end part of the tube 47c in a channel (FIG. 4). The proximal end side of the branch pipe part 57 branches into a suction pipe part 58 and a treatment instrument insertion pipe part 59. The suction tube portion 58 extends to the proximal end side in the longitudinal axis direction of the sheath portion 22 and forms a proximal end portion of the in-channel tube 47c. The treatment instrument insertion tube portion 59 extends obliquely to the proximal end side in the longitudinal axis direction of the sheath portion 22 and to one side in the lateral direction perpendicular to the longitudinal direction, thereby forming a treatment instrument insertion port 61. The treatment instrument insertion port 61 is disposed on the side where the bending operation knob 38 is disposed with respect to the operation unit housing 37 of the main body 21 when the sheath 22 is attached to the main body 21. . And from the connection part 62, the air supply outer tube 63a, the water supply outer tube 63b, and the channel outer tube 63c that are communicated with the air supply inner tube 47a, the water supply inner tube 47b, and the channel inner tube 47c are extended. The air supply outer tube 63a and the water supply outer tube 63b are connected to an air supply / water supply device, and the channel outer tube 63c is connected to a suction device.

  Hereinafter, an insertion mechanism for inserting the built-in portion 36 of the main body portion 21 into the sheath bending tube 51 and the snake tube 54 of the sheath portion 22 will be described.

  An air supply tube receiving portion 64a, a water supply tube receiving portion 64b, and a channel tube receiving portion 64c having a radially inward concave shape are formed on the outer peripheral portion of each node ring 27 of the bending portion 26 of the built-in portion 36. . The relative arrangement of the air supply tube receiving portion 64a, the water supply tube receiving portion 64b, and the channel tube receiving portion 64c in the circumferential direction around the central axis of the main body 21 is the circumferential direction around the central axis of the sheath portion 22. This is the same as the relative arrangement of the inner ends of the air supply nozzle 46a, the water supply nozzle 46b, and the channel opening 46c. That is, in each node ring 27, the cable insertion hole 32 through which the electric cable 24 is inserted, the air supply tube receiving portion 64a, the channel tube receiving portion 64c, and the water supply tube receiving portion 64b are arranged at equal intervals in the circumferential direction. . The air supply tube receiving portion 64a, the water supply tube receiving portion 64b, and the channel tube receiving portion 64c are, when the built-in portion 36 is inserted into and removed from the sheath portion 22, the air supply inner tube 47a, the water supply inner tube 47b, and the channel inner tube. It functions as a guide part guided by 47c, and functions as an accommodating part for accommodating each of the inner tubes 47a, 47b, 47c when the built-in part 36 is inserted into the sheath part 22 and the separate endoscope is used. .

  Hereinafter, an attachment / detachment mechanism for attaching / detaching the sheath portion 22 to / from the main body portion 21 will be described.

  The base end side of the connecting portion 62 of the sheath portion 22 forms a cylindrical mounting receiving portion 66 extending in the longitudinal axis direction of the sheath portion 22 (FIG. 1), and the distal end of the operation portion 31 of the main body portion 21. The side forms a mounting portion 67 extending in the longitudinal axis direction of the main body portion 21. The mounting portion 67 of the operation unit 31 can be inserted into and removed from the mounting receiving portion 66 of the connecting portion 62. A hook-like engagement portion 68 is disposed on the connecting portion 62, and an engagement receiving portion 69 is disposed on the distal end portion of the operation portion 31. By inserting the mounting portion 67 into the mounting receiving portion 66, the engaging portion 68 is engaged with the engagement receiving portion 69, and the sheath portion 22 is locked to the main body portion 21. On the other hand, a separation button 71 is disposed at the tip of the operation unit 31. By operating the separation button 71, the engagement of the engagement portion 68 with respect to the engagement receiving portion 69 is released, and the lock of the sheath portion 22 with respect to the main body portion 21 is released. 4 to 7B, the engagement portion 68 is not shown.

  With reference to FIG. 4 to FIG. 7B, the flow path displacement portion, the alignment mechanism, and the connection receiving portion 56 and the connection portion 62 that function as an introduction mechanism will be described in detail.

  Hereinafter, the manifold portion 72 as a flow path displacement portion that displaces the positions of the distal end portions of the outer tubes 63a, 63b, and 63c with respect to the positions of the proximal end portions of the inner tubes 47a, 47b, and 47c will be described.

  An inner tube connecting portion 73 to which the inner tubes 47a, 47b, 47c are connected is formed on the distal end side of the connecting portion 62. That is, the connecting portion 62 is formed by the outer part 74 and the inner part 76 attached to the outer part 74. The outer part 74 has a thick plate-like block portion 77 orthogonal to the longitudinal axis of the sheath portion 22. An air supply connection port 78 a and a water supply connection port 78 b as inner connection portions are formed in the block portion 77 so as to penetrate in the longitudinal axis direction of the sheath portion 22. The block portion 77 is formed with a channel base portion that protrudes from the distal end surface of the block portion 77 toward the distal end side in the longitudinal axis direction at a position corresponding to the channel connection port 78c. In the block portion 77, a channel connection port 78 c is formed through the distal end surface of the channel base portion in the longitudinal axis direction of the sheath portion 22. The proximal ends of the air supply inner tube 47a, the water supply inner tube 47b, and the channel inner tube 47c introduced into the connection receiving portion 56 are located at the distal ends of the air supply connection port 78a, the water supply connection port 78b, and the channel connection port 78c. Connected by adhesive fixing. The air supply connection port 78a, the water supply connection port 78b, and the channel connection port 78c are centered on the central axis of the sheath portion 22 with respect to the inner ends of the air supply nozzle 46a, the water supply nozzle 46b, and the channel opening 46c of the sheath distal end portion 43. Are arranged at the same position in the circumferential direction and outside in the radial direction.

  Further, an outer tube connecting portion 79 to which the outer tubes 63a, 63b, 63c are connected is formed on the base end side of the connecting portion 62. That is, the block portion 77 of the outer part 74 is a convex combination of a central rectangular shape on the central side and a lateral rectangular shape on one side adjacent to the central side with respect to a cross section orthogonal to the longitudinal axis of the sheath portion 22. Has a shape. The central rectangular shape is formed around the central axis of the sheath portion 22, and both rectangular shapes extend in the longitudinal direction perpendicular to the longitudinal axis direction and the lateral direction of the sheath portion 22. A side rectangular shape is formed in parallel on one side of the side opposite to the treatment instrument insertion port 61. A cylindrical mounting receiving portion 66 is integrally extended from the peripheral edge portion of the base end surface of the block portion 77 toward the base end side in the longitudinal axis direction. In the tubular mounting receiving portion 66, the inner cavity of the mounting receiving portion 66 has a shape in which a side rectangular shape is juxtaposed on one side of the central rectangular shape with respect to a cross section orthogonal to the longitudinal axis of the sheath portion 22. On the other hand, the inner part 76 includes a thin plate-like portion 81 that is orthogonal to the longitudinal axis of the sheath portion 22. Regarding the cross section orthogonal to the longitudinal axis of the sheath portion 22, the outer peripheral surface of the plate-like portion 81 has the same shape as the inner peripheral surface of the mounting receiving portion 66, and has a central rectangular shape on the central side and a lateral rectangular shape on one side. Have The plate-like portion 81 is fitted into the attachment receiving portion 66 from the proximal end side of the attachment receiving portion 66, and the distal end surface of the plate-like portion 81 is joined to the proximal end surface of the block portion 77. On the proximal end side of the plate-like portion 81, the central rectangular portion of the internal space of the attachment receiving portion 66 forms an attachment portion space into which the attachment portion 67 of the operation portion 31 is inserted and removed. On the other hand, on the proximal end side of the plate-like portion 81, the side rectangular portion of the inner space of the attachment receiving portion 66 forms an outer tube space where the attachment portion 67 is not disposed. That is, on the base end side of the plate-like portion 81, the cylindrical air supply base 82a, the water supply base 82b, and the channel base 82c as the outer connection portions are moved to the base end side in the side rectangular shape portion of the plate-like portion 81. The bases 82a, 82b, 82c are arranged in parallel in the vertical direction. The lumens of the caps 82 a, 82 b, 82 c penetrate the plate-like portion 81. Here, the bases 82 a, 82 b, 82 c are arranged at different positions in the circumferential direction around the central axis of the sheath portion 22 with respect to the corresponding connection ports 78 a, 78 b, 78 c on the distal end side of the block portion 77. Has been. Further, each of the two caps 82a, 82b, 82c are arranged closer together than the corresponding two connection ports 78a, 78b, 78c. The distal ends of the air supply outer tube 63a, the water supply outer tube 63b, and the channel outer tube 63c are extrapolated to the proximal ends of the air supply base 82a, the water supply base 82b, and the channel base 82c, respectively. Each outer tube 63a, 63b, 63c extends from the proximal end opening of the mounting receiving portion 66 to the proximal end side through the outer tube space.

  Referring also to FIG. 2, when the sheath portion 22 is attached to the main body portion 21, the caps 82 a, 82 b, 82 c are arranged on the side where the universal cord 41 is arranged, and from the side surface of the operation unit housing 37. Are also arranged in the vertical direction facing the base end side on the laterally outer side. Further, the outer tubes 63 a, 63 b, and 63 c are juxtaposed in the vertical direction on the outer side in the lateral direction with respect to the side surface of the operation unit housing 37, and extend collectively from the connecting portion 62 toward the base end side. The outer tubes 63 a, 63 b, and 63 c are bound to each other at the base end portion of the operation unit 31 and fixed to the operation unit 31.

  Between the air supply connection port 78a, the water supply connection port 78b, the channel connection port 78c, and the air supply base 82a, the water supply base 82b, and the channel base 82c, the air supply channel 84a, the water supply channel 84b, and the channel flow, respectively. A path 84c is formed. That is, an air supply groove 83a, a water supply groove 83b, and a channel groove 83c are formed on the base end face of the block portion 77 of the outer part 74. The air supply groove 83a, the water supply groove 83b, and the channel groove 83c are supplied from the position where the air supply connection port 78a, the water supply connection port 78b, and the channel connection port 78c are formed, respectively. The base 82a, the water supply base 82b, and the channel base 82c extend to positions where the lumens are disposed. By joining the plate-like portion 81 to the base end surface of the block portion 77, the air-feeding flow path 84 a and the water-feeding flow are provided between the air-feeding groove 83 a, the water-feeding groove 83 b, the channel groove 83 c and the plate-like portion 81 of the block portion 77. A channel 84b and a channel channel 84c are formed. Each flow path 84 a, 84 b, 84 c is arranged along an orthogonal plane that is orthogonal to the longitudinal axis direction of the sheath portion 22.

  Hereinafter, the alignment mechanism of the inner tubes 47a, 47b, 47c will be described.

  As described above, when the built-in portion 36 of the main body portion 21 is inserted into the snake tube 54 and the sheath bending tube 51 of the sheath portion 22, the built-in portion 36 along the inner tubes 47 a, 47 b, 47 c of the sheath portion 22. The tube receiving portions 64a, 64b and 64c of the curved portion 26 are guided. Further, the observation unit 23 of the built-in portion 36 needs to be accurately positioned on the proximal end side of the observation window 44 of the sheath distal end portion 43 of the sheath portion 22. Therefore, the air supply inner tube 47a, the water supply inner tube 47b, and the channel inner tube 47c are within the sheath bending tube 51 and the serpentine tube 54 with respect to the inner ends of the air supply nozzle 46a, the water supply nozzle 46b, and the channel opening 46c. It is preferable that the sheath portion 22 is linearly disposed at the same position in the circumferential direction and the radial direction with the central axis as the center without loosening. The alignment mechanism brings the inner tubes 47a, 47b, 47c into such an alignment state.

  The connection portion 62 is slidable in the longitudinal axis direction of the sheath portion 22 with respect to the connection receiving portion 56. That is, a cylindrical slide receiving portion 86 extending in the longitudinal axis direction is formed on the proximal end side of the connection receiving portion 56. On the other hand, in the outer part 74 of the connecting portion 62, a cylindrical sliding portion 87 is integrally extended from the tip end portion of the block portion 77 in the longitudinal axis direction. A sliding portion 87 is inserted into the sliding receiving portion 86 so as to be slidable in the longitudinal axis direction. The connecting portion 62 is normally at the most advanced position with respect to the connecting receiving portion 56. Further, in the outer part 74 of the connecting portion 62, the connection ports 78 a, 78 b, 78 c are arranged closer to the center axis with respect to the sliding portion 87 at the tip end portion of the block portion 77. The sliding portion 87 is provided with an air supply tube slit 88a and a branch tube portion slit 88c extending in the longitudinal axis direction for escaping the branch tube portion 57 of the air supply inner tube 47a and the channel inner tube 47c. Yes. As described above, the air supply connection port 78a, the water supply connection port 78b, and the channel connection port 78c are connected to the sheath portion 22 with respect to the inner ends of the air supply nozzle 46a, the water supply nozzle 46b, and the channel opening 46c of the sheath distal end portion 43. Are arranged at the same position in the circumferential direction around the central axis of the lens and on the outside in the radial direction. The inner tubes 47a, 47b, 47c are introduced into the coupling receiving portion 56 from the serpentine tube 54, extend radially outward and toward the proximal end, and are introduced into the sliding portion 87, and are connected to the connection ports 78a. , 78b, 78c. For this reason, the inner tube 47a, 47b, 47c is pulled toward the base end side by sliding the connecting portion 62 toward the base end side with respect to the connection receiving portion 56, and the inner tubes 47a, 47b, 47c. The slack is removed to form a straight line, and the inner tubes 47a, 47b, 47c are aligned.

  Hereinafter, an introduction mechanism for introducing the built-in portion 36 of the main body portion 21 into the serpentine tube 54 will be described.

  An insertion portion introducing hole 89 is formed through the block portion 77 of the outer part 74 of the connecting portion 62 along the central axis of the sheath portion 22. On the other hand, in the central part of the plate-like part 81 of the inner part 76, a cylindrical insertion part 91 extends toward the tip side along the central axis. An insertion hole 92 is formed by the lumen of the insertion portion 91. The insertion portion 91 is inserted into the insertion portion introduction hole 89 of the block portion 77, protrudes from the tip surface of the block portion 77, and is disposed in the sliding portion 87. The distal end surface of the insertion portion 91 is disposed so as to face the proximal end surface of the serpentine tube 54. The inner diameter of the insertion hole 92 is substantially equal to the outer diameter of the node ring 27 of the curved portion 26 of the main body 21, and the built-in portion 36 is inserted into the insertion hole 92 from the base end surface of the insertion hole 92, and from the distal end surface of the insertion hole 92. By projecting, the built-in part 36 can be introduced into the serpentine tube part 53.

  The manifold portion 72 is disposed around the insertion hole 92. That is, the connection ports 78 a, 78 b, 78 c are arranged around the insertion portion introduction hole 89 on the distal end surface of the block portion 77 of the outer part 74, and the inner tubes 47 a, 47 b introduced from the inside of the serpentine tube 54. , 47c are arranged around the insertion portion 91. Further, on the base end surface of the block portion 77, the grooves 83a, 83b, 83c extend to the caps 82a, 82b, 82c along the periphery of the insertion portion introduction hole 89.

  Next, a method of using the separation type endoscope according to this embodiment will be described.

  When using the separation type endoscope, the main body portion 21 is inserted into the sheath portion 22 and the sheath portion 22 is attached to the main body portion 21. That is, as shown in FIGS. 7A to 7B, the connecting portion 62 is slid to the proximal end side and held with respect to the connecting receiving portion 56 of the sheath portion 22. As a result, the inner tubes 47a, 47b, and 47c are pulled toward the proximal end side, and the slack of the inner tubes 47a, 47b, and 47c is removed and become linear, and the inner tubes 47a, 47b, and 47c are bent in the sheath. Aligned within the tube 51 and the snake tube 54. Subsequently, the built-in portion 36 of the main body portion 21 is inserted into the proximal end opening of the insertion hole 92 of the connecting portion 62. As shown in FIGS. 8A to 8B, the built-in portion 36 is led out from the distal end opening of the insertion hole 92 and introduced into the snake tube 54. At this time, the inner tubes 47a, 47b, and 47c in an aligned state are inserted into the tube receiving portions 64a, 64b, and 64c of the bending portion 26 of the built-in portion 36, and the tube receiving portions 64a, 64b, and 64c are connected to the inner portions. The built-in portion 36 is inserted into the serpentine tube 54 and the sheath bending tube 51 while being guided by the tubes 47a, 47b, 47c. When the observation unit 23 of the built-in portion 36 is disposed at the sheath distal end portion 43 of the sheath portion 22 and the attachment portion 67 of the operation portion 31 of the main body portion 21 is inserted into the attachment receiving portion 66 of the connection portion 62, The engaging portion 68 is engaged with the engaging receiving portion 69 of the operation portion 31, and the sheath portion 22 is locked to the main body portion 21. Subsequently, the outer tubes 63a, 63b, and 63c extending from the connecting portion 62 are bundled and fixed to the proximal end portion of the operation unit 31, and the outer tubes 63a, 63b, and 63c are connected to peripheral devices. The inside of the body cavity is observed using a separation type endoscope.

  Here, each of the outer tubes 63a, 63b, 63c is arranged laterally outside the side surface of the operation unit housing 37 in the vertical direction, and extends from the connecting part 62 toward the base end side. It is possible to prevent the tubes 63a, 63b, 63c and the operation unit 31 from interfering with each other. Further, the outer tubes 63a, 63b, and 63c are arranged together on the side where the bending operation knob 38 and the operation switch 39 are not arranged with respect to the operation unit 31, and the outer tubes 63a, 63b, and 63c are operated. It is prevented that the operation by a person is hindered.

  When the use of the separation type endoscope is finished, the separation button 71 of the operation unit 31 is operated to unlock the sheath portion 22 with respect to the main body portion 21. Subsequently, the built-in part 36 of the main body part 21 is removed from the sheath part 22, and then the sheath part 22 is discarded.

  Therefore, the separation type endoscope according to this embodiment has the following effects.

  In the separation type endoscope of the present embodiment, by using the manifold portion 72, the proximal ends of the air feeding inner tube 47a, the water feeding inner tube 47b, and the channel inner tube 47c inserted into the sheath bending tube 51 and the serpentine tube 54, respectively. Regardless of the position of the section, the positions of the distal ends of the air supply outer tube 63a, the water supply outer tube 63b, and the channel outer tube 63c can be arbitrarily set, and the outer tubes 63a, 63b, and 63c are appropriately disposed. Is possible. In particular, the outer tubes 63a, 63b, and 63c are collectively extended from the connecting portion 62 of the sheath portion 22, and a suitable arrangement of the outer tubes 63a, 63b, and 63c is realized.

  Since the air supply base 82a, the water supply base 82b, and the channel base 82c are collectively arranged, the air supply outer tube 63a, the water supply outer tube 63b, the channel are added to the air supply base 82a, the water supply base 82b, and the channel base 82c. When connecting the outer tube 63c, it is easy to perform a joining operation and a joining mistake is prevented.

  Further, in the manifold portion 72, the air supply flow path 84a, the water supply flow path 84b, and the channel flow path 84c extend along the orthogonal plane orthogonal to the longitudinal axis of the sheath portion 22, so that the compact manifold portion 72 is used. It is possible to sufficiently displace the position of the base end portion of each inner tube 47a, 47b, 47c and the position of the tip end portion of each corresponding outer tube 63a, 63b, 63c.

  In addition, by sliding the connecting portion 62 toward the proximal end side with respect to the connecting receiving portion 56 of the sheath portion 22, the inner tubes 47 a, 47 b, 47 c can be brought into an aligned state. When the built-in portion 36 of the main body portion 21 is inserted into the snake tube 54 and the sheath bending tube 51, the tube receiving portions 64a, 64b, 64c of the bending portion 26 of the built-in portion 36 are moved by the inner tubes 47a, 47b, 47c. It is possible to guide smoothly and reliably.

The perspective view which shows the separation type endoscope of one Embodiment of this invention in a isolation | separation state. The perspective view which shows the separation type endoscope of one Embodiment of this invention in a connection state. Sectional drawing which shows the curved part and inner tube of the separation type endoscope of one Embodiment of this invention. The disassembled perspective view which shows the base end part of the sheath part of the separation type endoscope of one Embodiment of this invention. The disassembled perspective view which shows the connection part of the separation type endoscope of one Embodiment of this invention. The partial cross section rear view which shows the base end part of the sheath part of the separation type endoscope of one Embodiment of this invention. The longitudinal cross-sectional view which cut | disconnects and shows the base end part of the sheath part of the separation type endoscope of one Embodiment of this invention along the VIIA-VIIA line | wire of FIG. The longitudinal cross-sectional view which shows the alignment operation | movement of the inner tube of the separation type endoscope of one Embodiment of this invention. The perspective view which shows the state before insertion in the insertion action of the built-in part of the separation type endoscope of one Embodiment of this invention. The perspective view which shows the state after insertion in the insertion action of the built-in part of the separation type endoscope of one Embodiment of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 21 ... Main-body part, 22 ... Sheath part, 31 ... Operation part, 36 ... Built-in part, 42 ... Cover (sheath insertion part), 43 ... Cover tip part (sheath tip part), 46a, 46b, 46c ... Opening part, 46a ... Air supply nozzle, 46b ... Water supply nozzle, 46c ... Channel opening, 47a ... Air supply inner tube, 47b ... Water supply inner tube, 47c ... Channel inner tube, 51,54 ... Cover body, 51 ... Sheath curved tube, 54 ... Conduit , 62 ... connection part, 63a ... air supply outer tube, 63b ... water supply outer tube, 63c ... channel outer tube, 64a, 64b, 64c ... guide part, 64a ... air supply tube receiving part, 64b ... water supply tube receiving part, 64c ... Channel tube receiving part, 72 ... Flow path displacement part (manifold part), 78a, 78b, 78c ... Inside connection part, 78a ... Air supply connection port, 78b ... Sending Connection port, 78c ... Channel connection port, 82a, 82b, 82c ... Outer connection part, 82a ... Air supply base, 82b ... Water supply base, 82c ... Channel base, 84a ... Air supply channel, 84b ... Water supply channel, 84c ... Channel flow path, 92 ... insertion hole.

Claims (6)

A main body part, and a sheath part removable from the main body part,
The main body is
An elongated built-in portion having a distal end portion and a proximal end portion;
An operation unit connected to a base end of the built-in unit and held and operated by an operator;
Have
The sheath portion is
A cover provided with a cylindrical cover body through which the built-in part is inserted, and a cover front end provided with an opening provided at a front end of the cover main body;
An inner tube inserted through the cover, a distal end portion of the inner tube being connected to the opening, and an inner tube extending from a distal end portion of the cover to a proximal end portion;
An outer tube extending from the base end of the cover;
A flow path displacement portion provided at a base end portion of the cover, the inner connection portion being provided at a distal end side of the flow path displacement portion and connected to the base end portion of the inner tube; A flow path displacement section comprising an outer connection section provided on the base end side of the section and connected to a distal end section of the outer tube, and a flow path communicating the inner connection section and the outer connection section,
Have
The inner connection portion and the outer connection portion are arranged at different positions in the circumferential direction around the longitudinal axis of the sheath portion.
Separable endoscope characterized by that. The flow path extends along an orthogonal plane orthogonal to the longitudinal axis of the sheath portion.
The separation type endoscope according to claim 1, wherein: The sheath portion includes first and second inner tubes, and first and second outer tubes,
The flow path displacement portion includes first and second inner connection portions to which proximal ends of the first and second inner tubes are connected, respectively, and distal ends of the first and second outer tubes. A first and a second outer connecting portion connected to each other,
The first outer connecting portion and the second outer connecting portion are arranged closer together than the first inner connecting portion and the second inner connecting portion,
The separation type endoscope according to claim 1, wherein: The sheath portion is provided at a base end portion of the cover, and has a connecting portion that is movable in the longitudinal axis direction of the cover with respect to the cover
The connecting portion has an insertion hole for inserting the built-in portion into the cover body, and the flow path displacement portion provided around the insertion hole,
The built-in portion has a guide portion that is guided by the inner tube when the built-in portion is inserted into the cover.
The separation type endoscope according to claim 1, wherein:   The main body part of the separation type endoscope according to any one of claims 1 to 4.   The sheath part of the separation type endoscope according to any one of claims 1 to 4.

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