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

Claim 0:
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.