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

Claim 7:
8. A driving force transmission mechanism for use with an endoscope, the driving force transmission mechanism comprising:
an output member driven by a motor to rotate around a rotation shaft, the output shaft including a through hole along the rotation shaft;
a rotation transmission member inserted into the through hole of the output member from one side of the rotation shaft and configured to receive a rotation driving force around the rotation shaft in a same direction as a direction of the rotation of the output member with the rotation of the output member;
an inside plane provided on an inner surface of the through hole in the output member and extending parallel to the rotation shaft;
a first plane extending to another end in an extending direction of the rotation shaft 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 one end of the rotation transmission member in the extending direction than an other end of the rotation transmission member, 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 an end face of the second plane on an other end side of the rotation shaft and the first plane and comes into contact with an end portion on the other end side in the extending 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 end side with respect to the output member.