WO2015072233A1 - 挿入機器、回転ユニット及び挿入装置 - Google Patents
挿入機器、回転ユニット及び挿入装置 Download PDFInfo
- Publication number
- WO2015072233A1 WO2015072233A1 PCT/JP2014/075685 JP2014075685W WO2015072233A1 WO 2015072233 A1 WO2015072233 A1 WO 2015072233A1 JP 2014075685 W JP2014075685 W JP 2014075685W WO 2015072233 A1 WO2015072233 A1 WO 2015072233A1
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- WIPO (PCT)
- Prior art keywords
- flexible tube
- flexible
- tube portion
- flexibility
- spiral
- Prior art date
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Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/005—Flexible endoscopes
- A61B1/0051—Flexible endoscopes with controlled bending of insertion part
- A61B1/0055—Constructional details of insertion parts, e.g. vertebral elements
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/00064—Constructional details of the endoscope body
- A61B1/00071—Insertion part of the endoscope body
- A61B1/00073—Insertion part of the endoscope body with externally grooved shaft
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/00131—Accessories for endoscopes
- A61B1/00133—Drive units for endoscopic tools inserted through or with the endoscope
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/00131—Accessories for endoscopes
- A61B1/00135—Oversleeves mounted on the endoscope prior to insertion
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/00147—Holding or positioning arrangements
- A61B1/00148—Holding or positioning arrangements using anchoring means
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/00147—Holding or positioning arrangements
- A61B1/0016—Holding or positioning arrangements using motor drive units
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/04—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor combined with photographic or television appliances
- A61B1/05—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor combined with photographic or television appliances characterised by the image sensor, e.g. camera, being in the distal end portion
Definitions
- the present invention relates to an insertion device in which a rotary unit including a spiral tube is mounted so as to be rotatable about a longitudinal axis.
- the present invention also relates to a rotation unit mounted on the insertion device, and an insertion device including the insertion device and the rotation unit.
- Patent Document 1 discloses an endoscope that is an insertion device including an insertion portion on which a rotation unit including a spiral tube is rotatably mounted around a longitudinal axis.
- the insertion portion is inserted through the rotation unit.
- the insertion portion includes an intermediate band in which the rotation unit is covered on the outer circumferential direction side, a distal band provided on the distal direction side of the intermediate band (tip band), and a proximal band provided on the proximal direction side of the intermediate band ( A proximal band).
- the distal and proximal zones are not covered with a rotating unit.
- the rotating unit rotates while the spiral tube is pressed in the inner circumferential direction from the lumen wall, so that the driving force in the distal direction or the driving force in the proximal direction is applied to the insertion unit and the rotating unit.
- the flexibility of the distal band, the middle band, and the proximal band of the insertion portion, and the flexibility of the middle band when the rotation unit is covered is not shown.
- lumens such as the inside of the small intestine and the inside of the large intestine
- the insertion direction of the insertion portion changes from the first lumen extending direction to the second lumen extending direction.
- the distal band is applied at the curved portion of the lumen by applying a driving force to the insertion portion from the state where the distal end of the intermediate band covered with the rotation unit in the lumen is located at the bent portion of the lumen.
- To the first lumen extending direction acts on the lumen wall.
- the first zone extending in the first lumen direction acting on the lumen wall from the intermediate zone at the lumen bending portion. The acting force increases.
- the proximal band is excessively flexible, even when a driving force in the distal direction from the state where the distal end of the proximal band is located at the lumen bending portion in the lumen is applied to the insertion part, The propulsive force is reduced in the first lumen extending direction acting on the proximal zone.
- the acting force in the proximal direction (direction opposite to the first lumen extending direction) acting on the lumen wall from the distal end of the proximal zone is reduced, and the outer peripheral direction of the distal end of the proximal zone
- the lumen wall does not move in the removal direction (the direction opposite to the first lumen extending direction) from the side region.
- the folds (folds) of the lumen wall are concentrated in the region on the outer peripheral direction side of the distal end portion of the proximal band, and mobility in the removal direction of the lumen wall is lowered.
- the mobility of the proximal band in the second lumen extending direction decreases, and the insertion section moves in the distal direction from the state where the distal end of the proximal band is located at the lumen bending portion. The nature will decline.
- the present invention has been made paying attention to the above-mentioned problems, and the object of the present invention is to provide a longitudinal axis at the lumen bending portion of the lumen even when the rotary unit is rotatably mounted on the insertion portion.
- An object of the present invention is to provide an insertion device in which the mobility of the insertion portion along the line is ensured. Moreover, it is providing the rotation unit with which the insertion apparatus is mounted
- an aspect of the present invention provides an insertion device in which a rotary unit including a spiral tube is rotatably mounted about a longitudinal axis, and extends along the longitudinal axis.
- An insertion portion that is inserted through the rotation unit, a first flexible tube portion that is provided in the insertion portion and is less flexible than the spiral tube, and a proximal end in the insertion portion that is more proximal than the first flexible tube portion
- a second flexible tube portion provided on the direction side and covered with the spiral tube on the outer circumferential direction side when the rotating unit is mounted on the insertion portion, and the spiral tube is not covered In the state, it is lower than the spiral tube and has the same flexibility as the first flexible tube portion or higher than the first flexible tube portion, and the spiral tube has the outer circumference.
- a second flexible tube portion that is less flexible than the first flexible tube portion by being coated on the opposite side, and the proximal direction from the second flexible tube portion in the insertion portion
- a third flexible tube portion that is provided on the side and is less flexible than the first flexible tube portion.
- an insertion device that ensures the mobility of the insertion portion along the longitudinal axis at the lumen bending portion of the lumen even when the rotation unit is rotatably mounted on the insertion portion. be able to. Moreover, the rotation unit mounted on the insertion device, and the insertion device including the insertion device and the rotation unit can be provided.
- FIG. 1 is a schematic diagram showing an endoscope apparatus according to a first embodiment of the present invention. It is the schematic which shows the structure which transmits rotational drive force to the rotation unit which concerns on 1st Embodiment. It is sectional drawing which shows schematically the structure of the curved part which concerns on 1st Embodiment, a 1st flexible tube part, a 2nd flexible tube part, and a rotation unit. It is sectional drawing which shows roughly the structure of the 2nd flexible tube part which concerns on 1st Embodiment, a 3rd flexible tube part, a base part, and a rotation unit.
- FIG. 5 is a cross-sectional view taken along line VV in FIG. 4.
- FIG. It is the schematic which shows the state which made the driving force to the front-end
- FIG. 1 is a diagram illustrating an endoscope apparatus 1 that is an insertion apparatus according to the first embodiment.
- the endoscope apparatus 1 has a longitudinal axis C.
- One of the directions parallel to the longitudinal axis C (the direction of the arrow C1 in FIG. 1) is the proximal direction, and the opposite direction (the direction of the arrow C2 in FIG. 1) is the distal direction.
- the distal direction and the proximal direction are parallel to the longitudinal axis C.
- the endoscope apparatus 1 includes an endoscope 2 that is an insertion device.
- the endoscope 2 includes an insertion portion (endoscope insertion portion) 3 extending along the longitudinal axis C, and an operation portion (endoscope operation portion) 5 provided on the proximal direction side from the insertion portion 3. .
- the insertion portion 3 extends along the longitudinal axis C and is inserted into the body cavity when the endoscope apparatus 1 is used.
- the peripheral unit 10 includes an image processing unit 11 such as an image processor, a light source unit 12 including a light source such as a lamp, a storage unit such as a power source and a memory, and a CPU (Central Processing Unit) or an ASIC (application specific integrated circuit). ), A drive operation input unit 15 such as a button or a foot switch, and a display unit 16 such as a monitor.
- image processing unit 11 such as an image processor
- light source unit 12 including a light source such as a lamp
- a storage unit such as a power source and a memory
- a CPU Central Processing Unit
- ASIC application specific integrated circuit
- the insertion portion 3 includes a distal rigid portion 21 that forms the distal end of the insertion portion 3, a bending portion 22 provided on the proximal direction side from the distal rigid portion 21, and a bending portion 22.
- a base portion 27 is provided between the second flexible tube portion 25 and the third flexible tube portion 26 in the axial parallel direction parallel to the longitudinal axis C.
- the second flexible tube portion 25 is connected to the third flexible tube portion 26 via the base portion 27.
- the first axis parallel dimension L1 of the first flexible tube portion 23 in the axis parallel direction parallel to the longitudinal axis C is the second axis parallel dimension L2 of the second flexible tube portion 25 in the axis parallel direction. More small.
- the second axis parallel dimension L2 of the second flexible tube portion 25 in the axis parallel direction is smaller than the third axis parallel dimension L3 of the third flexible tube portion 26 in the axis parallel direction.
- the fourth axis parallel dimension L4 of the base portion 27 in the axis parallel direction is smaller than the first axis parallel dimension L1.
- the direction away from the longitudinal axis C is defined as the outer circumferential direction (separated axis direction), and the direction toward the longitudinal axis C is defined as the inner circumferential direction (axial direction).
- a cylindrical rotating unit 30 is provided on the outer peripheral direction side of the insertion portion 3. In a state where the insertion unit 3 is inserted through the rotation unit 30, the rotation unit 30 is attached to the insertion unit 3 of the endoscope 2. In a state where the rotation unit 30 is mounted on the insertion portion 3, the rotation driving force is transmitted, whereby the rotation unit 30 rotates about the longitudinal axis C with respect to the insertion portion 3.
- the rotary unit 30 includes a spiral tube 31 extending along the longitudinal axis C.
- the spiral tube 31 includes a corrugated tube portion 32 and a fin portion 33 extending on the outer peripheral surface of the corrugated tube portion 32.
- the fin portion 33 extends in a spiral shape around the longitudinal axis C from the proximal direction to the distal direction.
- a distal end side cylindrical portion 35 is provided on the distal direction side of the spiral tube 31 .
- the distal end side cylindrical portion 35 is formed in a tapered shape whose outer diameter decreases toward the distal direction side.
- a tubular proximal end side cylindrical portion 36 is provided on the proximal direction side of the spiral tube 31 .
- the rotation unit 30 rotates about the longitudinal axis C in a state where the fin portion 33 of the spiral tube 31 is pressed in the inner circumferential direction by a lumen wall or the like, the rotation unit 30 rotates in the distal direction or the proximal direction.
- Propulsive force acts on the insertion portion 3 and the rotation unit 30. Due to the propulsive force in the distal direction, the mobility in the insertion direction (distal direction) of the insertion portion 3 in the lumen such as the inside of the small intestine or the inside of the large intestine is improved.
- the mobility of the insertion portion 3 in the removal direction (base end direction) is improved.
- FIG. 2 is a diagram showing a configuration for transmitting the rotational driving force to the rotary unit 30.
- FIG. 3 is a diagram illustrating configurations of the bending portion 22, the first flexible tube portion 23, the second flexible tube portion 25, and the rotation unit 30.
- FIG. 4 is a diagram illustrating configurations of the second flexible tube portion 25, the third flexible tube portion 26, the base portion 27, and the rotation unit 30.
- FIG. 5 is a cross-sectional view taken along the line VV of FIG.
- a bending operation knob 37 for inputting a bending operation of the bending portion 22 is provided on the outer surface of the operation portion 5.
- bending wires 38 ⁇ / b> A and 38 ⁇ / b> B extend along the longitudinal axis C in the insertion portion 3.
- the base ends of the bending wires 38 ⁇ / b> A and 38 ⁇ / b> B are connected to a pulley (not shown) connected to the bending operation knob 37.
- the distal ends of the bending wires 38 ⁇ / b> A and 38 ⁇ / b> B are connected to the distal end portion of the bending portion 22.
- the bending portion 22 is bent.
- the bending portion 22 is composed only of an active bending portion that is bent by a bending operation.
- the respective bending wires 38A and 38B are inserted through the corresponding coils 39A and 39B.
- the base ends of the coils 39 ⁇ / b> A and 39 ⁇ / b> B are extended to the inside of the operation unit 5.
- the tips of the coils 39 ⁇ / b> A and 39 ⁇ / b> B are connected to the inner peripheral surface of the tip portion of the first flexible tube portion 23.
- two bending wires 38A and 38B are provided and the bending portion 22 can be bent in two directions.
- four bending wires are provided and the bending portion 22 is bent in four directions. It may be possible.
- an imaging cable 41, a light guide 42, and a channel tube 43 are extended along the longitudinal axis C in the insertion portion 3.
- An imaging element (not shown) for imaging a subject is provided inside the distal end rigid portion 21 (the distal end portion of the insertion portion 3). The imaging element images a subject through the observation window 46.
- One end of the imaging cable 41 is connected to the imaging element.
- the imaging cable 41 extends through the insertion unit 3, the operation unit 5, and the universal cord 6, and the other end is connected to the image processing unit 11 of the peripheral unit 10. Image processing of the subject image picked up by the image processing unit 11 is performed, and a subject image is generated. Then, the generated image of the subject is displayed on the display unit 16.
- the light guide 42 extends through the inside of the insertion portion 3, the inside of the operation portion 5, and the inside of the universal cord 6, and is connected to the light source portion 12 of the peripheral unit 10.
- the light emitted from the light source unit 12 is guided by the light guide 42 and irradiated to the subject from the illumination window 47 of the distal end portion (the distal end rigid portion 21) of the insertion portion 3.
- a treatment instrument insertion portion 48 into which a treatment instrument such as forceps is inserted is provided on the outer surface of the operation portion 5.
- One end of the channel tube 43 is connected to the treatment instrument insertion portion 48 through the inside of the insertion portion 3 and the inside of the operation portion 5.
- the treatment instrument inserted from the treatment instrument insertion portion 48 passes through the inside of the channel tube 43 and protrudes from the opening 49 of the distal end rigid portion 21 toward the distal end. Then, the treatment with the treatment instrument is performed in a state where the treatment instrument protrudes from the opening 49 of the distal end rigid portion 21.
- the base portion 27 is provided with a support member 51 formed of metal.
- the proximal end portion of the second flexible tube portion 25 is connected to the distal end portion of the support member 51.
- the distal end portion of the third flexible tube portion 26 is connected to the proximal end portion of the support member 51.
- the second flexible tube portion 25 and the third flexible tube portion 26 are connected via the base portion 27.
- a hollow portion 52 is defined by the support member 51.
- a driving force transmission unit 53 is attached to the support member 51.
- the driving force transmission unit 53 is disposed in the cavity 52. Further, the driving force transmission unit 53 is driven by transmitting a rotational driving force for rotating the rotary unit 30.
- the driving force transmission unit 53 includes a driving gear 55.
- the driving force transmission unit 53 includes a rotating cylindrical member 58.
- the rotating cylindrical member 58 is attached to the base portion 27 in a state where the support member 51 is inserted through the rotating cylindrical member 58.
- the rotating cylindrical member 58 is rotatable about the longitudinal axis C with respect to the insertion portion 3 (base portion 27).
- two directions in which the rotation unit 30 rotates are defined as directions around the longitudinal axis.
- an inner peripheral gear portion 59 is provided over the entire circumference in the direction around the longitudinal axis.
- the inner peripheral gear portion 59 meshes with the drive gear 55.
- three inner rollers 61A to 61C are attached to the rotating cylindrical member 58.
- the inner rollers 61A to 61C are arranged in a state separated from each other by a substantially equal interval in the direction around the longitudinal axis.
- Each inner roller 61A-61C has a corresponding roller shaft (Q1-Q3).
- Each of the inner rollers 61A to 61C is rotatable with respect to the rotating cylindrical member 58 about the corresponding roller shaft (Q1 to Q3).
- the inner rollers 61A to 61C can rotate about the longitudinal axis C with respect to the insertion portion 3 (base portion 27) integrally with the rotating cylindrical member 58.
- a cylindrical cover member 62 is coated on the outer peripheral side of the rotating cylindrical member 58 and the inner rollers 61A to 61C.
- the front end of the cover member 62 is fixed to the outer peripheral surface of the support member 51 via an adhesive portion 63A such as an adhesive
- the base end of the cover member 62 is fixed to the outer peripheral surface of the support member 51 via an adhesive portion 63B such as an adhesive. It is fixed.
- the cavity 52 in which the driving force transmission unit 53 is disposed is partitioned from the outside of the insertion portion 3 by the cover member 62.
- the support member 51 and the cover member 62 are kept liquid-tight at the fixed position at the distal end of the cover member 62 and the fixed position at the proximal end of the cover member 62.
- the cover member 62 protrudes in the outer peripheral direction at a portion where the inner rollers 61A to 61C are located in the direction around the longitudinal axis.
- the cover member 62 is fixed with respect to the insertion portion 3, and the rotating cylindrical member 58 and the inner rollers 61 A to 61 C are rotatable about the longitudinal axis with respect to the cover member 62.
- outer rollers 65A to 65F are attached to the inner peripheral surface of the base end side tubular portion 36.
- the outer rollers 65A to 65F are located on the outer peripheral direction side of the cover member 62.
- the inner roller 61A is positioned between the outer roller 65A and the outer roller 65B in the direction around the longitudinal axis, and the outer roller 65C and the outer roller 65D are located in the direction around the longitudinal axis.
- the inner roller 61B is located between the two.
- the inner roller 61C is located between the outer roller 65E and the outer roller 65F in the direction around the longitudinal axis.
- Each of the outer rollers 65A to 65F has a corresponding roller shaft (P1 to P6).
- Each of the outer rollers 65A to 65F is rotatable with respect to the cover member 62 and the proximal end side cylindrical portion 36 around the corresponding roller shaft (P1 to P6). Further, the outer rollers 65A to 65F can rotate about the longitudinal axis C with respect to the insertion portion 3 (base portion 27) integrally with the rotation unit 30.
- the rotating cylindrical member 58 rotates about the longitudinal axis C.
- the inner roller 61A presses the outer roller 65A or the outer roller 65B.
- the inner roller 61B presses the outer roller 65C or the outer roller 65D
- the inner roller 61C presses the outer roller 65E or the outer roller 65F.
- the driving force is transmitted from the inner rollers 61A to 61C to the outer rollers 65A to 65F of the rotating unit 30, and the rotating unit 30 rotates about the longitudinal axis C with respect to the insertion portion 3 and the cover member 62.
- the outer rollers 65A to 65F attached to the base end side cylindrical portion 36 serve as a driving force receiving portion that receives a rotational driving force from the driven driving force transmission unit 53.
- the outer rollers 65A to 65F, which are driving force receiving portions, are provided on the proximal direction side of the spiral tube 31. Further, the outer rollers 65 A to 65 F are positioned on the outer peripheral direction side of the base portion 27 in a state where the rotation unit 30 is mounted on the insertion portion 3.
- the inner rollers 61A to 61C rotate about the corresponding roller shafts (Q1 to Q3), so that the friction between the inner rollers 61A to 61C and the cover member 62 is reduced.
- the outer rollers 65A to 65F rotate around the corresponding roller shafts (P1 to P6), the friction between the outer rollers 65A to 65F and the cover member 62 is reduced. For this reason, the rotational driving force is appropriately transmitted from the inner rollers 61A to 61C to the rotary unit 30, and the rotary unit 30 rotates appropriately.
- the base end side cylindrical portion 36 is provided with a locking claw 67 protruding toward the inner peripheral direction.
- the support member 51 of the base portion 27 is provided with a locking groove 68 over the entire circumference in the direction around the longitudinal axis.
- a motor housing 71 is connected to the operation unit 5.
- a motor 72 that is a drive source is accommodated in the motor housing 71.
- One end of a motor cable 73 is connected to the motor 72.
- the motor cable 73 extends through the operation unit 5 and the universal cord 6, and the other end is connected to the drive control unit 13 of the peripheral unit 10.
- the motor 72 is driven.
- a rotational driving force for rotating the rotary unit 30 is generated.
- a relay gear 75 is attached to the motor 72.
- a drive gear 76 that meshes with the relay gear 75 is provided inside the operation unit 5.
- a guide tube 77 extends along the longitudinal axis C inside the third flexible tube portion 26 of the insertion portion 3.
- the distal end of the guide tube 77 is connected to the support member 51 of the base portion 27.
- a guide channel 78 is formed inside the guide tube 77.
- the distal end of the guide channel 78 communicates with the cavity 52.
- a drive shaft 79 that is a linear portion extends along the shaft axis S.
- the rotational driving force generated by the motor 72 is transmitted to the drive shaft 79 via the relay gear 75 and the drive gear 76. When the rotational driving force is transmitted to the drive shaft 79, the drive shaft 79 rotates about the shaft axis S.
- the tip of the drive shaft 79 is connected to the drive gear 55 of the drive force transmission unit 53.
- the rotational drive force is transmitted to the drive force transmission unit 53, and the drive force transmission unit 53 is driven.
- the rotational driving force is transmitted to the rotating cylindrical member 58, whereby the rotational driving force is transmitted to the rotating unit 30 as described above.
- the rotation unit 30 rotates.
- the bending portion 22 includes a bending tube 81.
- the bending tube 81 includes a plurality of metal bending pieces 82. Each bending piece 82 is rotatably connected to the adjacent bending piece 82.
- a curved reticulated tube 83 that is a bending blade is coated on the outer peripheral side of the bending tube 81.
- metal strands (not shown) are knitted in a mesh shape.
- a bending envelope 85 is covered on the outer peripheral direction side of the bending mesh tube 83.
- the curved outer skin 85 is made of, for example, fluororubber.
- FIG. 6 is an exploded view of the first flexible tube portion 23 and the second flexible tube portion 25 for each member.
- the first flexible tube portion 23 and the second flexible tube portion 25 are the first flex (first flex).
- the first spiral tube 91, the first flexible reticulated tube 92, and the first flexible outer skin 93 are elongated from the distal end of the first flexible tube portion 23 to the proximal end of the second flexible tube portion 25. It extends along the axis C.
- the first flexible mesh tube 92 is covered on the outer circumferential direction side of the first spiral tube 91, and the first flexible sheath 93 is coated on the outer circumferential direction side of the first flexible mesh tube 92.
- the proximal end portion of the curved tube 81 is fitted into a cylindrical connecting tube 84.
- the first spiral tube 91 and the first flexible reticular tube 92 are fitted to the connection tube 84 in a state of being inserted on the inner peripheral direction side of the connection tube 84.
- the first flexible outer skin 93 is bonded to the curved outer skin 85 via an adhesive portion 86 such as an adhesive.
- the first flexible tube portion 23 and the bending portion 22 are connected to each other.
- the first spiral tube 91, the first flexible reticulated tube 92, and the first flexible outer skin 93 are fitted to the support member 51 in a state of being inserted on the inner peripheral direction side of the support member 51.
- the second flexible tube portion 25 is connected to the base portion 27.
- the first spiral tube 91, the first flexible reticulated tube 92, and the first flexible outer skin 93 are composed of the first flexible tube portion 23 and the second flexible tube portion 25. It is extended in a continuous state.
- the first spiral tube 91 includes a metal strip member 95.
- the belt-like member 95 extends in a spiral shape with the longitudinal axis C as the center.
- the first flexible reticular tube 92 includes a metal strand 96.
- a strand 96 is knitted.
- the first flexible skin 93 is made of a resin material.
- the third flexible tube portion 26 includes a second helical tube 101 which is a second flex, and a second flexible blade (second flexible blade). ) And a second flexible mesh tube 102 and a second flexible envelope 103.
- the second spiral tube 101, the second flexible reticulated tube 102, and the second flexible skin 103 are elongated from the distal end of the third flexible tube portion 26 to the proximal end of the third flexible tube portion 26. It extends along the axis C.
- a second flexible mesh tube 102 is coated on the outer circumferential direction side of the second spiral tube 101, and a second flexible skin 103 is coated on the outer circumferential direction side of the second flexible mesh tube 102.
- the base end portion of the support member 51 is fitted with the connection member 104.
- the second spiral tube 101 and the second flexible mesh tube 102 are fitted to the connection member 104 in a state of being inserted on the inner circumferential direction side of the connection member 104.
- the third flexible tube portion 26 is connected to the base portion 27.
- a metal strip member 105 extends in a spiral shape with the longitudinal axis C as the center.
- a metal strand 106 is knitted in the second flexible reticulated tube 102.
- the second flexible outer skin 103 is made of a resin material.
- the configuration related to the first flexible tube portion 23 and the second flexible tube portion 25 is indicated by reference numerals without parentheses, and the configuration related to the third flexible tube portion 26 is parenthesized. Are indicated by reference numerals.
- the outer rollers 65A to 65F which are driving force receiving portions, are located on the outer peripheral direction side of the base portion 27.
- the base end of the rotation unit 30 is located on the outer peripheral direction side of the base portion 27 in a state where the rotation unit 30 is attached to the insertion portion 3.
- the rotation unit 30 is extended toward the front-end
- the spiral tube 31 of the rotation unit 30 is covered on the outer peripheral side of the second flexible tube portion 25.
- the tip of the rotation unit 30 is located in a region between the first flexible tube portion 23 and the second flexible tube portion 25 in the axis parallel direction parallel to the longitudinal axis C. For this reason, in the state in which the rotation unit 30 is attached to the insertion portion 3, the rotation unit 30 is not covered on the outer peripheral direction side of the first flexible tube portion 23.
- the bending portion 22 is provided with a bending tube 81 that is easily bent perpendicular to the longitudinal axis C, and the bending outer skin 85 is formed of a highly flexible material. For this reason, the bending portion 22 is more flexible than any of the first flexible tube portion 23, the second flexible tube portion 25, and the third flexible tube portion 26. Further, the spiral tube 31 of the rotation unit 30 is made of a highly flexible resin, and any one of the first flexible tube portion 23, the second flexible tube portion 25, and the third flexible tube portion 26 is used. Also, the flexibility becomes high.
- the first flexible tube portion 23, the second flexible tube portion 25, and the third flexible tube portion 26 are an inner diameter of the spiral tube (91, 101), and a belt-like member (91, 101) in the spiral tube (91, 101). 95, 105), the number of layers of the helical tube (91, 101), the diameter of the strand (96, 106) in the flexible mesh tube (92, 102), the thickness of the flexible sheath (93, 103) The thickness varies depending on the thickness, the outer diameter of the flexible tube portion (23, 25, 26), the hardness of the resin forming the flexible outer skin (93, 103), and the like.
- the flexibility of the flexible tube portion (23, 25, 26) decreases, and as the thickness of the strip member (95, 105) increases, the flexibility increases.
- the flexibility of the pipe parts (23, 25, 26) is reduced.
- the flexibility of the flexible tube portions (23, 25, 26) decreases, and as the diameter of the strands (96, 106) increases.
- the flexibility of the flexible tube portion (23, 25, 26) is lowered.
- the outer diameter increases, the flexibility of the flexible tube portion (23, 25, 26) decreases, and as the thickness of the flexible outer skin (93, 103) increases, the flexible tube portion (23 , 25, 26).
- the resin hardness at the flexible outer skin (93, 103) increases, the flexibility of the flexible tube portion (23, 25, 26) increases.
- the first flexible tube portion 23 has the same flexibility as the second flexible tube portion 25 in a state where the rotation unit 30 is not attached to the insertion portion 3.
- the second flexible tube portion 25 is more flexible than the first flexible tube portion 23 when the rotary unit 30 is not attached to the insertion portion 3. .
- the second flexible tube portion 25 is different in flexibility.
- the second flexible tube portion 25 is not allowed to be covered with the first flexible tube portion 25 in a state where the spiral tube 31 is not covered with the second flexible tube portion 25. It has the same flexibility as the flexible tube part 23 or higher flexibility than the first flexible tube part 23. However, even when the spiral tube 31 is not covered with the second flexible tube portion 25, the second flexible tube portion 25 is less flexible than the spiral tube 31 and the bending portion 22.
- the inner diameter of the first spiral tube 91 is adjusted in the range of 9.4 mm to 9.8 mm, and the thickness of the band-shaped member 95 is increased. It is adjusted in the range of 0.20 mm to 0.28 mm.
- the number of layers of the first spiral tube 91 is one, and the diameter of the strand 96 is in the range of 0.08 mm to 0.12 mm. It has been adjusted with.
- the thickness of the first flexible outer skin 93 is adjusted in the range of 0.4 mm to 0.8 mm, and the outer diameter is 11. It is adjusted in the range of 5 mm to 11.9 mm.
- the spiral tube 31 is covered on the outer peripheral direction side of the second flexible tube portion 25 by mounting the rotation unit 30 on the insertion portion 3. In this state, the first flexible tube portion 23 and the third flexible tube portion 26 are not covered with the rotating unit 30.
- the second flexible tube portion 25 is less flexible than the first flexible tube portion 23.
- the spiral tube 31 is more flexible than the first flexible tube portion 23 and the second flexible tube portion 25, and the second flexible tube portion 25 is the same as the first flexible tube portion 23.
- it has higher flexibility than the first flexible tube portion 23. For this reason, even when the spiral tube 31 is covered with the second flexible tube portion 25, the flexibility of the second flexible tube portion 25 is excessively lower than that of the first flexible tube portion 23. There is nothing.
- the third flexible tube portion 26 is less flexible than the first flexible tube portion 23 and the second flexible tube portion 25 over the entire length in the axis parallel direction parallel to the longitudinal axis C.
- the guide channel 78 and the drive shaft 79 are extended in the distal direction to the cavity portion 52 defined by the support member 51. That is, the guide channel 78 and the drive shaft 79 that do not extend inside the first flexible tube portion 23 and the second flexible tube portion 25 are provided in the third flexible tube portion 26. It is extended.
- the number of built-in extension objects for example, imaging cable 41, light guide 42, etc.
- the third flexible tube portion 26 has a cross-sectional area perpendicular to the longitudinal axis C of the space formed therein, and the first flexible tube portion 23 and the second flexible tube portion 2. It is necessary to make it larger than the flexible tube portion 25. For this reason, in the 3rd flexible tube part 26, compared with the 2nd spiral tube 101 of the 1st flexible tube part 23 and the 2nd flexible tube part 25, the inside diameter of the 1st spiral tube 91 is made. It is necessary to increase the outer diameter as compared with the first flexible tube portion 23 and the second flexible tube portion 25.
- the third flexible tube portion 26 is the first flexible tube portion.
- the flexibility is lower than that of the second flexible tube portion 25 and the second flexible tube portion 25.
- the flexibility decreases from the distal direction toward the proximal direction.
- the proximal end portion and the distal end portion of the third flexible tube portion 26 have different flexibility.
- the inner diameter of the second spiral tube 101 is adjusted in the range of 10.7 mm to 11.0 mm, and the thickness of the strip member 105 is adjusted in the range of 0.28 mm to 0.32 mm.
- the number of layers of the second spiral tube 101 is one layer or two layers, and the diameter of the strand 106 is adjusted in the range of 0.10 mm to 0.12 mm.
- the thickness of the second flexible outer skin 103 is adjusted in the range of 0.35 mm to 0.6 mm, and the outer diameter is adjusted in the range of 12.7 mm to 13.2 mm. Has been.
- the inner diameter of the second spiral tube 101 is 11 mm
- the thickness of the belt-like member 105 is 0.32 mm
- the number of layers of the second spiral tube 101 is two
- the diameter of the strand 106 is 0.12 mm
- the second The state in which the thickness of the flexible outer skin 103 is 0.6 mm and the outer diameter of the third flexible tube portion 26 is 13.2 mm is the minimum flexible state of the third flexible tube portion 26. .
- the 3rd flexible tube part 26 it becomes the flexibility which is the same as a minimum flexibility state, or higher than a minimum flexibility state also in the base end where flexibility becomes the lowest. Therefore, in the 3rd flexible tube part 26, flexibility does not become low too much.
- the second flexible tube portion 25 has substantially the same flexibility as the distal end portion of the third flexible tube portion 26 even when the spiral tube 31 is covered. Therefore, even in the second flexible tube portion 25 covered with the spiral tube 31, the flexibility is higher than the lowest flexibility state of the third flexible tube portion 26, and the flexibility becomes excessively low. Absent.
- the state in which the flexibility is substantially the same means that the flexibility of the second flexible tube portion 25 covered with the spiral tube 31 is the flexibility of the distal end portion of the third flexible tube portion 26. It is not limited to the same state. In other words, in a state where the flexibility is substantially the same, the flexibility of the distal end portion of the third flexible tube portion 26 is more flexible than the flexibility of the second flexible tube portion 25 covered with the spiral tube 31.
- the flexibility of the third flexible tube portion 26 is set as described above, the third flexible tube portion 26 is in contrast to the second flexible tube portion 25 covered with the spiral tube 31. The flexibility is not excessively high and the flexibility is not excessively low. Further, since the first flexible tube portion 23 is more flexible than the tip portion of the third flexible tube portion 26, the first flexible tube portion 23 is excessively flexible with respect to the curved portion 22. It will not be too low.
- FIG. 7 is a diagram showing the flexibility of the first flexible tube portion 23, the second flexible tube portion 25, the third flexible tube portion 26, and the spiral tube 31.
- the flexibility of the spiral tube 31 is indicated by a straight line T1.
- the flexibility of the first flexible tube portion 23 is indicated by a straight line T2.
- the flexibility of the second flexible tube portion 25 in a state where the spiral tube 31 is not covered is adjusted in a range between the straight line T3 and the straight line T4. Therefore, as described above, the spiral tube 31 is more flexible than the first flexible tube portion 23 and the second flexible tube portion 25.
- the flexibility of the second flexible tube portion 25 in a state where the spiral tube 31 is not covered is the same as the flexibility of the first flexible tube portion 23 or the first flexible tube. It becomes higher than the flexibility of the part 23.
- the flexibility of the second flexible tube portion 25 is adjusted as described above, the flexibility of the second flexible tube portion 25 in the state where the spiral tube 31 is covered is a straight line T5. And a straight line T6. And the flexibility of the 3rd flexible tube part 26 is adjusted in the range between the straight line T7 and the straight line T8. Therefore, as described above, the second flexible tube portion 25 has substantially the same flexibility as the tip portion of the third flexible tube portion 26 in a state where the spiral tube 31 is covered. Then, at the base end of the third flexible tube portion 26, the same flexibility as the lowest flexible state or higher flexibility than the lowest flexible state.
- the base portion 27 is hard. For this reason, the base portion 27 is less flexible than the third flexible tube portion 26 and is less flexible than the lowest flexible state.
- the fourth axis parallel dimension L4 of the base portion 27 in the axis parallel direction parallel to the longitudinal axis C is small. For this reason, there is almost no influence of the flexibility of the base portion 27 on the mobility along the longitudinal axis C of the insertion portion 3 in the lumen.
- the operation and effect of the endoscope apparatus 1 that is an insertion apparatus including the rotation unit 30 of the present embodiment and the endoscope 2 that is an insertion device will be described.
- the insertion unit 3 and the rotation unit 30 are inserted into the lumen while the rotation unit 30 is attached to the insertion unit 3.
- the drive force transmission unit 53 attached to the base portion 27 of the insertion portion 3 is rotationally driven as described above. Power is transmitted.
- the driving force transmission unit 53 is driven, and the outer rollers 65A to 65F, which are driving force receiving portions, receive the rotational driving force from the driving force transmission unit 53.
- the rotation unit 30 rotates around the longitudinal axis C.
- the rotation unit 30 rotates about the longitudinal axis C in a state in which the fin portion 33 of the spiral tube 31 is pressed in the inner circumferential direction by the lumen wall or the like, so that the insertion portion 3 is moved in the distal direction or the proximal direction.
- Propulsive force acts on the insertion portion 3 and the rotation unit 30.
- FIG. 8 a first comparative example is shown in FIG.
- the flexibility of the first flexible tube portion 23A is excessively low with respect to the curved portion 22A.
- in lumens such as the inside of the small intestine and the inside of the large intestine, there is a lumen bending site (lumen bending site) B0 where the lumen is bent.
- the lumen is bent from the first lumen extending direction (the direction of arrow B1 in FIG. 8) to the second lumen extending direction (the direction of arrow B2 in FIG. 8).
- the insertion direction of the insertion portion 3A changes from the first lumen extending direction to the second lumen extending direction.
- the first flexible tube A propulsive force acts on the portion 23A in the first lumen extending direction B1.
- the first flexible tube portion 23A moves in the first lumen extending direction B1
- the first curved tube portion 23A moves from the first flexible tube portion 23A to the first lumen extending direction B1 at the lumen bending portion B0. Acts on the lumen wall.
- the first flexible tube portion 23A since the flexibility of the first flexible tube portion 23A is excessively low with respect to the curved portion 22A, the first flexible tube portion 23A has a shape along the lumen at the lumen bending portion B0. It is difficult to bend, and the acting force in the first lumen extending direction B1 acting on the lumen wall from the first flexible tube portion 23A at the lumen bending portion B0 becomes excessively large. When a large acting force acts in the first lumen extending direction B1 from the first flexible tube portion 23A, the lumen wall moves in the first lumen extending direction B1 at the lumen bending portion B0. , Sticky phenomenon will occur.
- the mobility of the first flexible tube portion 23A in the second lumen extending direction B2 from the lumen bending portion B0 decreases. Thereby, the mobility to the front-end
- FIG. 9 shows a state in which a propulsive force in the distal direction is applied to the insertion portion 3 from a state where the distal end of the first flexible tube portion 23 of the present embodiment is located at the lumen bending portion B0. .
- the first flexible tube portion 23 is more flexible than the third flexible tube portion 26 and is more flexible than the second flexible tube portion 25 in a state where the spiral tube 31 is covered. Increases nature. For this reason, in the 1st flexible tube part 23, flexibility does not become low too much with respect to the curved part 22.
- the tip of the first flexible tube portion 23 is located at the lumen bending portion B0. Even when a propulsive force is applied to the first flexible tube portion 23 in the first lumen extending direction B1 (front end direction), the first flexible tube portion 23 has the first bending portion B0. The flexible tube portion 23 is easily bent into a shape along the lumen. Further, the acting force acting on the lumen wall from the first flexible tube portion 23 toward the first lumen extending direction B1 does not increase at the lumen bending portion B0, and the sticking phenomenon occurs at the lumen bending portion B0. Is less likely to occur.
- the mobility along the lumen (longitudinal axis C) of the first flexible tube portion 23 at the lumen bending portion B0 can be ensured. That is, the mobility in the second lumen extending direction B2 of the first flexible tube portion 23 from the state where the tip of the first flexible tube portion 23 is located at the lumen bending portion B0 is ensured. be able to.
- FIG. 10 a second comparative example is shown in FIG.
- the flexibility of the second flexible tube portion 25B covered with the spiral tube 31B is different from that of the first flexible tube portion 23B. Too low.
- a propulsive force in the distal direction insertion direction
- the first flexible tube A propulsive force acts on the portion 25B in the first lumen extending direction B1.
- the second flexible tube portion 25B moves in the first lumen extending direction B1, and from the second flexible tube portion 25B to the first lumen extending direction B1 at the lumen bending portion B0. Acts on the lumen wall. Since the flexibility of the second flexible tube portion 25B covered with the spiral tube 31B is excessively lower than that of the first flexible tube portion 23B, the second flexible tube portion is formed at the lumen bending portion B0. 25B and the spiral tube 31B are unlikely to be bent along the lumen, and the acting force in the first lumen extending direction B1 acting on the lumen wall from the second flexible tube portion 25B at the lumen bending portion B0. Becomes overly large. As a result, the aforementioned sticking phenomenon occurs.
- the mobility of the second flexible tube portion 25B and the spiral tube 31B in the second lumen extending direction B2 from the lumen bending portion B0 decreases. Thereby, the mobility to the front-end
- FIG. 11 shows a state in which a propulsive force in the distal direction from the state where the distal end of the second flexible tube portion 25 of the present embodiment is located at the lumen bending portion B0 is applied to the insertion portion 3.
- the spiral tube 31 is more flexible than the first flexible tube portion 23 and the second flexible tube portion 25, and the second flexible tube portion 25 is the first flexible tube. It has the same flexibility as the portion 23 or higher flexibility than the first flexible tube portion 23.
- the flexibility of the second flexible tube portion 25 is substantially the same as the flexibility of the tip portion of the third flexible tube portion 26. For this reason, even if the spiral tube 31 is covered, the second flexible tube portion 25 does not have excessively low flexibility with respect to the first flexible tube portion 23.
- the tip of the second flexible tube portion 25 is located at the lumen bending portion B0. Even when a propulsive force is applied to the second flexible tube portion 25 in the first lumen extending direction B1 (front end direction), the second allowable portion where the spiral tube 31 is covered at the lumen bending portion B0. The flexible tube portion 25 is easily bent into a shape along the lumen. Further, the acting force acting on the lumen wall from the second flexible tube portion 25 toward the first lumen extending direction B1 does not increase at the lumen bending portion B0, and the sticking phenomenon occurs at the lumen bending portion B0. Is less likely to occur.
- the mobility along the lumen (longitudinal axis C) of the second flexible tube portion 25 covered with the spiral tube 31 at the lumen bending portion B0 can be ensured. That is, the mobility of the second flexible tube portion 25 in the second lumen extending direction B2 from the state where the tip of the second flexible tube portion 25 is located at the lumen bending portion B0 is ensured. be able to.
- a third comparative example is shown in FIG.
- the flexibility of the third flexible tube portion 26C is higher than that of the second flexible tube portion 25C covered with the spiral tube 31C. Too high. Since the flexibility is excessively high in the third flexible tube portion 26C, the propulsive force in the distal direction from the state in which the distal end portion of the third flexible tube portion 26C is located in the lumen bending portion B0 in the lumen. Even if it is made to act on the insertion portion 3C, the propulsive force becomes excessively small in the first lumen extending direction B1 acting on the third flexible tube portion 26C.
- the first force acting on the lumen wall By reducing the driving force in the first lumen extending direction B1 acting on the third flexible tube portion 26C, the first force acting on the lumen wall from the distal end portion of the third flexible tube portion 26C.
- the acting force in the opposite direction (proximal direction) to the lumen extending direction B1 is reduced.
- the lumen wall does not move in the removal direction (the direction opposite to the first lumen extending direction B1) from the outer peripheral side region of the distal end portion of the third flexible tube portion 26C.
- folds (folds) of the lumen wall are concentrated in the outer peripheral side region of the distal end portion of the third flexible tube portion 26C, and the mobility in the removal direction of the lumen wall is lowered.
- the mobility of the third flexible tube portion 26C in the second lumen extending direction B2 is reduced. Thereby, the mobility to the front-end
- FIG. 13 shows a state in which the insertion force is applied to the insertion portion 3 from the state in which the distal end portion of the third flexible tube portion 26 of the present embodiment is located at the lumen bending portion B0. .
- the third flexible tube portion 26 is less flexible than the first flexible tube portion 23. For this reason, in the 3rd flexible tube part 26, flexibility does not become high too much with respect to the 2nd flexible tube part 25 with which the spiral tube 31 was coat
- the flexibility of the third flexible tube portion 26 is adjusted as described above, as shown in FIG. 13, from the state where the tip of the third flexible tube portion 26 is located at the lumen bending portion B0. Even when a propulsive force in the distal direction (insertion direction) is applied to the insertion portion 3, the propulsive force acting on the third flexible tube portion 26 in the first lumen extending direction B1 is excessively small. Don't be. For this reason, in the lumen bending portion B0, the acting force in the proximal direction (the direction opposite to the first lumen extending direction B1) from the distal end portion of the third flexible tube portion 26 to the lumen wall is appropriate. Act on.
- the lumen wall moves in the removal direction (the direction opposite to the first lumen extending direction B1) from the outer peripheral side region of the distal end portion of the third flexible tube portion 26, and the third In the region on the outer peripheral direction side of the distal end portion of the flexible tube portion 26, the crowding of the lumen wall is prevented. Therefore, the mobility along the lumen (longitudinal axis C) of the third flexible tube portion 26 at the lumen bending portion B0 can be ensured. That is, the mobility of the third flexible tube portion 26 in the second lumen extending direction B2 from the state where the distal end portion of the third flexible tube portion 26 is located at the lumen bending portion B0 is ensured. can do.
- the third flexible tube portion 26 has the same flexibility as the above-mentioned minimum flexibility state or higher than the minimum flexibility state even at the base end where the flexibility is lowest in the third flexible tube portion 26. Have sex.
- the distal end portion of the third flexible tube portion 26 has substantially the same flexibility as the second flexible tube portion 25 covered with the spiral tube 31. For this reason, in the 3rd flexible tube part 26, flexibility does not become low too much with respect to the 2nd flexible tube part 25 with which the spiral tube 31 was coat
- the flexibility of the third flexible tube portion 26 does not become excessively low, the first lumen extension from the state where the tip of the third flexible tube portion 26 is located at the lumen bending portion B0. Even when a driving force in the installation direction B1 (tip direction) is applied to the third flexible tube portion 26, the third flexible tube portion 26 has a shape along the lumen in the lumen bending portion B0. It becomes easy to bend. In addition, the aforementioned sticking phenomenon is less likely to occur at the lumen bending portion B0. Thereby, the mobility along the lumen (longitudinal axis C) of the third flexible tube portion 26 at the lumen bending portion B0 can be more reliably ensured.
- the flexibility of the first flexible tube portion 23, the second flexible tube portion 25, the third flexible tube portion 26, and the spiral tube 31 is adjusted. Even when 30 is rotatably mounted, the mobility of the insertion portion 3 along the longitudinal axis C at the lumen bending portion B0 of the lumen can be ensured.
- the first flexible tube portion 23 and the second flexible tube portion 25 are the same member (the first spiral tube 91, the first flexible reticulated tube 92, and the first Although it is formed from the flexible outer skin 93), it is not limited to this.
- FIG. 14 shows a first modification as a modification.
- the first flexible tube portion 23 includes a first spiral tube 111, a first flexible mesh tube 112, and a first flexible skin 113.
- the second flexible tube portion 25 includes a second spiral tube 115, a second flexible mesh tube 116, and a second flexible skin 117.
- the third flexible tube portion 26 includes a third spiral tube 121, a third flexible mesh tube 122, and a third flexible skin 123.
- the first spiral tube 111, the second spiral tube 115, and the third spiral tube 121 are made of metal strip members (95, 105), similarly to the spiral tube (91, 101) of the first embodiment. Is formed.
- the first flexible mesh tube 112, the second flexible mesh tube 116, and the third flexible mesh tube 122 are made of metal, like the flexible mesh tube (92, 102) of the first embodiment. It is formed from strands (96, 106).
- the first flexible outer skin 113, the second flexible outer skin 117, and the third flexible outer skin 123 are formed of a resin, like the flexible outer skins (93, 103) of the first embodiment. Yes.
- the second spiral tube 115 and the second flexible mesh tube 116 are inserted on the inner circumferential direction side of the first spiral tube 111, and the first spiral tube 111 and the first flexible mesh tube 112. It is mated with.
- the first flexible outer skin 113 is bonded to the second flexible outer skin 117 via an adhesive portion 118 such as an adhesive.
- the first flexible tube portion 23 and the second flexible tube portion 25 are connected to each other.
- the second spiral tube 115, the second flexible mesh tube 116, and the second flexible outer skin 117 are fitted to the support member 51 in a state of being inserted on the inner circumferential direction side of the support member 51.
- the second flexible tube portion 25 is connected to the base portion 27.
- the third spiral tube 121, the third flexible reticulated tube 122, and the third flexible outer skin 123 are fitted to the support member 51 while being inserted in the inner peripheral direction side of the support member 51. Yes. As a result, the third flexible tube portion 26 is connected to the base portion 27.
- the spiral tube 31 is more flexible than the first flexible tube portion 23 and the second flexible tube portion 25 as in the first embodiment.
- the second flexible tube portion 25 is the same as the first flexible tube portion 23 or has a higher flexibility than the first flexible tube portion 23.
- the second flexible tube portion 25 is less flexible than the first flexible tube portion 23 when the spiral tube 31 is covered.
- the third flexible tube portion 26 is less flexible than the first flexible tube portion 23, and the tip portion of the third flexible tube portion 26 is a second tube covered with the spiral tube 31.
- the flexible tube portion 25 has substantially the same flexibility.
- the bending portion 22 is composed of only an active bending portion that is bent by a bending operation, but is not limited thereto.
- the bending portion 22 may include an active bending portion 125 and a passive bending portion 126.
- the active bending portion 125 is actively bent by a bending operation.
- the passive bending portion 126 is passively bent by an external force.
- the passive bending portion 126 is continuous to the proximal direction side of the active bending portion 125.
- the active bending portion 125 includes an active bending tube 128 formed from a plurality of bending pieces 127.
- the passive bending portion 126 includes a passive bending tube 132 formed from a plurality of bending pieces 131.
- the active bending tube 128 and the passive bending tube 132 are formed in the same manner as the bending tube 81 of the first embodiment.
- the passive bending tube 132 is fitted into the active bending tube 128 in a state where the passive bending tube 132 is inserted on the inner circumferential direction side of the active bending tube 128.
- a curved reticulated tube 133 is coated on the outer peripheral side of the active bending tube 128 and the passive bending tube 132.
- a curved outer skin 135 is coated on the outer circumferential side of the curved mesh tube 133.
- the curved mesh tube 133 is formed in the same manner as the curved mesh tube 83 of the first embodiment, and the curved skin 135 is formed in the same manner as the curved skin 85 of the first embodiment.
- the base portion 27 is provided between the second flexible tube portion 25 and the third flexible tube portion 26, but the present invention is not limited to this.
- a base portion 27 may be provided between the first flexible tube portion 23 and the second flexible tube portion 25.
- the spiral tube 31 is covered on the outer peripheral direction side of the second flexible tube portion 25 in a state where the rotation unit 30 is mounted on the insertion portion 3.
- the first flexible tube portion 23 and the third flexible tube portion 26 are not covered with the rotating unit 30.
- the driving force transmission unit 53 is attached to the base portion 27.
- the rotating unit 30 is provided with a driving force receiving portion (for example, a configuration similar to the outer rollers 65A to 65F of the first embodiment) that receives the rotational driving force from the driving force transmission unit 53.
- the driving force receiving portions are provided in the distal end side cylindrical portion 35 and are located on the distal direction side from the spiral tube 31. Therefore, in this modification, the rotation unit 30 extends from the driving force receiving portion (65A to 65F) toward the proximal end.
- the flexibility of the spiral tube 31, the first flexible tube portion 23, the second flexible tube portion 25, and the third flexible tube portion 26 is the same as that of the first embodiment. It is adjusted in the same way.
- the endoscope apparatus 1 which is an insertion apparatus including the endoscope 2 as an insertion apparatus has been described.
- the present invention is also applied to an insertion apparatus including a manipulator as an insertion apparatus, for example. Is possible.
- the 2nd flexible tube part (25) provided in the base end direction side from the 1st flexible tube part (23) and the 1st flexible tube part (23). Is less flexible than the spiral tube (31).
- the spiral tube (31) is covered on the outer peripheral side of the second flexible tube portion (25).
- the second flexible tube portion (25) is the same as or higher than the first flexible tube portion (23). It has flexibility. And by covering the spiral tube (31) on the outer peripheral direction side, the flexibility of the second flexible tube portion (25) becomes lower than that of the first flexible tube portion (23).
- the third flexible tube portion (26) provided on the proximal direction side from the second flexible tube portion (25) is less flexible than the first flexible tube portion (23).
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Abstract
Description
本発明の第1の実施形態について、図1乃至図14を参照して説明する。図1は、第1の実施形態に係る挿入装置である内視鏡装置1を示す図である。図1に示すように、内視鏡装置1は、長手軸Cを有する。長手軸Cに平行な方向の一方(図1の矢印C1の方向)が基端方向であり、基端方向とは反対方向(図1の矢印C2の方向)が先端方向である。そして、先端方向及び基端方向が長手軸Cに平行な軸平行方向となる。内視鏡装置1は、挿入機器である内視鏡2を備える。内視鏡2は、長手軸Cに沿って延設される挿入部(内視鏡挿入部)3と、挿入部3より基端方向側に設けられる操作部(内視鏡操作部)5と、を備える。挿入部3は、長手軸Cに沿って延設され、内視鏡装置1の使用時には体腔内に挿入される。
なお、第1の実施形態では、第1の可撓管部23及び第2の可撓管部25は同一の部材(第1の螺旋管91、第1の可撓網状管92及び第1の可撓外皮93)から形成されているが、これに限るものではない。例えば、変形例として第1の変形例を図14に示す。第1の変形例では、第1の可撓管部23は、第1の螺旋管111、第1の可撓網状管112及び第1の可撓外皮113を備える。また、第2の可撓管部25は、第2の螺旋管115、第2の可撓網状管116及び第2の可撓外皮117を備える。そして、第3の可撓管部26は、第3の螺旋管121、第3の可撓網状管122及び第3の可撓外皮123を備える。前述のような構成にすることにより、第1の可撓管部23は、第2の可撓管部25とは別部材から形成される。
Claims (8)
- スパイラルチューブを備える回転ユニットが長手軸を中心として回転可能に装着される挿入機器であって、
前記長手軸に沿って延設され、前記回転ユニットに挿通される挿入部と、
前記挿入部に設けられ、前記スパイラルチューブより可撓性が低い第1の可撓管部と、
前記挿入部において前記第1の可撓管部より基端方向側に設けられ、前記回転ユニットが前記挿入部に装着された状態において、外周方向側に前記スパイラルチューブが被覆される第2の可撓管部であって、前記スパイラルチューブが被覆されていない状態において、前記スパイラルチューブより低く、かつ、前記第1の可撓管部と同一又は前記第1の可撓管部より高い可撓性を有し、前記スパイラルチューブが前記外周方向側に被覆されることにより、前記第1の可撓管部より可撓性が低くなる第2の可撓管部と、
前記挿入部において前記第2の可撓管部より前記基端方向側に設けられ、前記第1の可撓管部より可撓性が低い第3の可撓管部と、
を具備する挿入機器。 - 前記第3の可撓管部は、先端方向から前記基端方向へ向かうにつれて、可撓性が低くなる、請求項1の挿入機器。
- 前記第3の可撓管部は、前記長手軸を中心として螺旋状に延設される金属製の帯部材を備える螺旋管と、網状に編み込まれる金属製の素線を備え、前記螺旋管の前記外周方向側に被覆される可撓網状管と、前記可撓網状管の前記外周方向側に被覆される樹脂製の可撓外皮と、を備え、
前記螺旋管の内径が11mm、前記螺旋管の前記帯状部材の肉厚が0.32mm、前記螺旋管の層数が2層、前記可撓網状管の素線の径が0.12mm、前記可撓外皮の肉厚が0.6mm、かつ、前記第3の可撓管部の外径が13.2mmとなる状態を最低可撓状態とした場合に、前記第3の可撓管部の基端では、前記最低可撓状態と同一又は前記最低可撓状態より高い可撓性となる、
請求項2の挿入機器。 - 前記第2の可撓管部は、前記スパイラルチューブが前記第2の可撓管部に被覆された状態において、前記最低可撓状態より可撓性が高くなる、請求項3の挿入機器。
- 前記長手軸に平行な軸平行方向について前記第2の可撓管部と前記第3の可撓管部との間に位置する状態で前記挿入部に設けられ、前記第3の可撓管部より可撓性の低いベース部であって、前記回転ユニットが前記挿入部に装着された状態において、前記回転ユニットにおいて前記スパイラルチューブの前記基端方向側に設けられる駆動力受け部が前記外周方向側に位置するベース部と、
前記ベース部に取付けられ、前記回転ユニットを回転させる回転駆動力が伝達されることにより駆動される駆動力伝達ユニットであって、前記回転ユニットが前記挿入部に装着された状態で駆動されることにより、前記駆動力受け部に前記回転駆動力を伝達する駆動力伝達ユニットと、
をさらに具備する、請求項1の挿入機器。 - 前記長手軸に平行な軸平行方向についての前記第1の可撓管部の第1の軸平行寸法は、前記軸平行方向についての前記第2の可撓管部の第2の軸平行寸法より小さく、
前記第2の軸平行寸法は、前記軸平行方向についての前記第3の可撓管部の第3の軸平行寸法より小さい、
請求項1の挿入機器。 - 請求項1の挿入機器の前記挿入部に前記長手軸を中心として回転可能に装着される前記回転ユニットであって、
前記挿入部に装着された状態において前記第2の可撓管部の前記外周方向側に被覆され、前記第2の可撓管部より可撓性が高いスパイラルチューブを具備する、
回転ユニット。 - 請求項1の挿入機器と、
前記挿入機器の前記挿入部に前記長手軸を中心として回転可能に装着される前記回転ユニットであって、前記挿入部に装着された状態において前記第2の可撓管部の前記外周方向側に被覆され、前記第2の可撓管部より可撓性が高い前記スパイラルチューブを備える前記回転ユニットと、
を具備する挿入装置。
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EP14861452.2A EP3069649A4 (en) | 2013-11-14 | 2014-09-26 | Insertion instrument, rotation unit, and insertion device |
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