Patent ID: 11925324
Assignee: OLYMPUS CORPORATION
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 20:
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 including a plurality of concave portions on an outer periphery of the rotary shaft, each concave portion of the plurality of concave portions being formed by a pair of side wall surfaces formed along the axis, each of the pair of side wall surfaces disposed symmetrically relative to a plane passing through a rotation axis of the rotary shaft so as to be at a right angle relative to each other or be at an obtuse angle relative to each other; and
a raising base including a hole having an inner periphery, the rotary shaft being disposed within the hole to fix the 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 distal end portion by rotation of the rotary shaft when the rotary shaft is disposed within the hole.