Operation mechanism, endoscope apparatus, and guide catheter

An endoscope apparatus comprising:

• a longitudinal member that has a longitudinal axis and has a channel through which a medical device is capable of being inserted along the longitudinal axis;
• a subject operation section that is provided at a distal end side of the longitudinal member and has a curved portion that is capable of being curved;
• an operation section main body that is provided at a proximal end side of the longitudinal member and has a hole communicating with the channel and through which the medical device is inserted, the operation section to be supported by an operator;
• a first input portion provided in the operation section main body for curving the curved portion;
• a first transmission means, a distal end of which being connected to the curved portion, the first transmission means that transmits an input operation of the first input portion to the curved portion;
• a second input portion to which an operation amount of an operation section of the medical device with respect to the operation section main body is transmitted, the second input portion being provided in the operation section main body so as to be capable of being tilt operated toward a predetermined direction by a tilting operation of the medical device itself with respect to the operation section main body, and supporting the medical device being inserted into the channel via the hole rotatably around the longitudinal axis and slidably along the longitudinal axis;
• a driving section being provided in the operation section main body and configured to transfer a driving force for curving the curved portion corresponding to the operation amount transmitted to the second input portion;
• and
• a second transmission means that transmits the driving force transferred from the driving section to the first input portion in order to curve the curved portion.