Insertion apparatus and endoscope

Patent metadata

Field	Value
Publication number	US-11925324-B2
Application number	US-202016934535-A
Country	US
Kind code	B2
Filing date	Jul 21, 2020
Priority date	Jan 31, 2018
Publication date	Mar 12, 2024
Grant date	Mar 12, 2024

Abstract

An insertion apparatus includes: a base member, a rotary shaft, and a driven member including a hole. A plurality of concave portions are formed on the rotary shaft, and a pair of side wall surfaces which form each of the plurality of concave portions are disposed so as to intersect with each other at a right angle or at an obtuse angle.

First claim

What is claimed is:

1. An insertion apparatus comprising:
a base member mounted on an insertion section configured to be inserted into a subject;
a rotary shaft configured to rotate relative to the base member; and
a raising base including a hole having an inner periphery, the rotary shaft being disposed within the hole to fix an outer periphery of the rotary shaft relative to the inner periphery of the hole such that the raising base is rotatably driven with respect to the base member by rotation of the rotary shaft when the rotary shaft is disposed within the hole, wherein
the rotary shaft includes a plurality of concave portions formed along the outer periphery, the concave portions being formed radially inward relative to a rotation axis of the rotary shaft,
each of the plurality of concave portions having a pair of side wall surfaces disposed symmetrically relative to a plane passing through the rotation axis of the rotary shaft, the pair of side wall surfaces being arranged so as to be at a right angle relative to each other or being arranged so as to be at an obtuse angle relative to each other.

2. The insertion apparatus according to claim 1 , wherein the rotary shaft is connected to a wire which passes through the insertion section, the rotary shaft being configured to rotate along with advancing or retracting of the wire in a longitudinal direction.

3. The insertion apparatus according to claim 1 , wherein the raising base is a treatment instrument raising base disposed at a distal end portion of the insertion section.

4. The insertion apparatus according to claim 1 , wherein the raising base includes: a proximal end portion in which the hole is formed; and a tongue-shaped part which extends from the proximal end portion in a direction orthogonal to the rotary shaft.

5. The insertion apparatus according to claim 1 , wherein the insertion apparatus is configured such that a gap between the outer periphery of the rotary shaft and the inner periphery of the hole is partially or wholly eliminated due to plastic deformation of at least one of the rotary shaft and the raising base after fitting the rotary shaft and the hole to each other.

6. The insertion apparatus according to claim 5 , wherein a proximal end portion of the raising base in which the hole is formed comprises a flat surface configured to plastically deform when the rotary shaft is fitted in the hole.

7. The insertion apparatus according to claim 1 , wherein the inner periphery of the hole comprises a plurality of projections each configured to engage with a corresponding concave portion of the plurality of concave portions.

8. The insertion apparatus according to claim 1 , wherein the inner periphery of the hole is defined by a plurality of circular cylindrical surfaces and a projection disposed between adjacent circular cylindrical surfaces of the plurality of circular cylindrical surfaces, each projection projecting radially from the adjacent circular cylindrical surfaces to engage with a corresponding concave portion of the plurality of concave portions.

9. The insertion apparatus according to claim 8 , wherein the engaging projections having a surface area on which a rotating force is applied from the rotary shaft.

10. The insertion apparatus according to claim 1 , wherein each of the plurality of concave portions having the pair of side wall surfaces, each side wall surface of the pair of side wall surfaces facing in a direction having a radial component, the radial component being less than being fully facing a radial direction, the pair of side wall surfaces being arranged so as to meet at a right angle or being arranged so as to meet at an obtuse angle.

11. The insertion apparatus according to claim 1 , wherein the outer periphery between adjacent concave portions of the plurality of concave portions includes an outermost circumferential surface having a first length in a circumferential direction,
each of the pair of side wall surfaces has a continuous second length, and
the first length is longer than the second length.

12. An endoscope comprising:
an image pickup apparatus disposed on a distal end portion of an insertion section configured to be inserted into a subject, the image pickup apparatus having a direction of view on a side of the insertion section;
a base member integrally fixed to the distal end portion;
a rotary shaft configured to rotate relative to the base member; and
a raising base including a hole having an inner periphery, the rotary shaft being disposed within the hole to fix an outer periphery of the rotary shaft relative to the inner periphery of the hole such that the raising base rotates in the direction of view of the image pickup apparatus with respect to the base member by rotation of the rotary shaft when the rotary shaft is disposed within the hole, and
the rotary shaft includes a plurality of concave portions on an outer periphery of the rotary shaft, the concave portion being formed radially inward relative to a rotation axis of the rotary shaft,
each of the plurality of concave portions having a pair of side wall surfaces disposed symmetrically relative to a plane passing through the rotation axis of the rotary shaft, the pair of side wall surfaces being disposed so as to be at a right angle relative to each other or disposed so as to be an obtuse angle relative to each other.

13. The endoscope according to claim 12 , wherein the rotary shaft is connected to a wire which passes through the insertion section, the rotary shaft being configured to rotate along with advancing or retracting of the wire in a longitudinal direction.

14. The endoscope according to claim 12 , wherein the raising base is disposed at the distal end portion of the insertion section.

15. The endoscope according to claim 12 , wherein the raising base includes: a proximal end portion in which the hole is formed; and a tongue-shaped part which extends from the proximal end portion in a direction orthogonal to the rotary shaft.

16. The endoscope according to claim 12 , wherein the insertion apparatus is configured such that a gap between the outer periphery of the rotary shaft and the inner periphery of the hole is partially or wholly eliminated due to plastic deformation of at least one of the rotary shaft and the raising base after fitting the rotary shaft and the hole to each other.

17. The endoscope according to claim 16 , wherein a proximal end portion of the raising base in which the hole is formed comprises a flat surface configured to plastically deform when the rotary shaft is fitted in the hole.

18. The endoscope according to claim 12 , wherein the inner periphery of the hole comprises a plurality of projections each configured to engage with a corresponding concave portion of the plurality of concave portions.

19. The endoscope according to claim 12 , wherein the inner periphery of the hole is defined by a plurality of circular cylindrical surfaces and a plurality of engaging projections disposed between each of the plurality of engaging projections, each of the engaging projections projecting radially from each of the plurality of circular cylindrical surfaces.

20. The endoscope according to claim 19 , wherein the engaging projections having a surface area on which a rotating force is applied from the rotary shaft.

21. An insertion apparatus comprising:
a distal end portion;
a rotary shaft configured to rotate with respect to the distal end portion around an axis of the rotary shaft, the rotary shaft inc

Assignees

• Olympus Corp

Inventors

• Kato Akihiro
• Toyooka Takuya
• Hayakawa Fumitoshi

Classifications

• A61B1/018 Primary

  for receiving instruments · CPC title

• A61B1/05

  characterised by the image sensor, e.g. camera, being in the distal end portion · CPC title

• A61B1/00098 Primary

  Deflecting means for inserted tools · CPC title

• A61B1/00101

  the distal tip features being detachable · CPC title

• A61B1/0676

  at distal tip of an endoscope · CPC title