Patent ID: 11931005
Assignee: OLYMPUS CORPORATION
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 0:
1. A driving force transmission mechanism for use with an endoscope, the driving force transmission mechanism comprising:
an insertion portion extending in an axial direction and configured to be inserted into an object;
an operation portion provided proximally relative to the insertion portion;
a motor disposed at one of a proximal end portion in the axial direction of the insertion portion or in the operation portion;
an output member driven by the motor to rotate around a rotation shaft parallel or substantially parallel to the axial direction of the insertion portion the output member including a through hole along the rotation shaft;
a rotation transmission member inserted into the through hole of the output member from a distal end side in the axial direction of the through hole and configured to receive a rotation driving force around the rotation shaft along with a rotation of the output member;
an inside plane provided on an inner surface of the through hole in the output member, the inside plane extending parallel to the rotation shaft;
a first plane extending to a proximal end in the axial direction parallel to the rotation shaft on an outer circumferential surface of the rotation transmission member and part of the first plane faces the inside plane of the output member when the rotation transmission member is inserted into the through hole of the output member;
a second plane provided on the outer circumferential surface of the rotation transmission member, the second plane being parallel to the rotation shaft and inclined with respect to the first plane so as to extend by a set distance from a position closer to the distal end side in the axial direction than the proximal end to a distal end side in the axial direction, and at least part of the second plane comes into contact with the inside plane during rotation of the output member to receive the rotation force of the output member; and
a third plane connecting a proximal end in the axial direction of the second plane and the first plane of the rotation transmission member, the third plane contacting with a proximal end in the axial direction of the output member when the output member rotates with respect to the rotation transmission member and at least part of the second plane contacts the inside plane, to restrict the rotation transmission member from moving toward the distal end side in the axial direction with respect to the output member.