MEDICAL DEVICE

1 . A medical device comprising:

a long main body including a distal end portion;

two or more movable portions arranged at the main body or in a vicinity of the distal end portion;

a single input interface part operated by an operator; and

a control part switching and controlling the respective movable portions in accordance with an operation amount input to the input interface part.

2 . The medical device according to claim 1 , wherein the two or more movable portions are bending movable portions that perform bending operation, and are arranged so as to be spaced from each other in a longitudinal direction of the main body.

3 . The medical device according to claim 2 , wherein when an operation amount input to the input interface part is smaller than a predetermined threshold, the control part drives the bending movable portion arranged on a more distal end side, and when an operation amount is equal to or larger than the threshold, the control part drives the bending movable portion on a more proximal end side.

4 . The medical device according to claim 1 , wherein the distal end portion is a treatment tool including an end effector at a distal end thereof.

5 . The medical device according to claim 4 , wherein the main body is an endoscope.

6 . The medical device according to claim 5 , wherein the movable portion of the treatment tool is driven when an operation amount input to the input interface part is smaller than a predetermined threshold,

wherein the movable portion of the endoscope is driven when an operation amount is equal to or larger than the threshold, and an operation amount is increased, and

wherein a drive of the movable portion of the endoscope is made invalid when an operation amount is equal to or larger than the threshold, and an operation amount is decreased.

7 . The medical device according to claim 2 , wherein the control part switches and controls the respective movable portions on the basis of magnitude of a differential value of an operation amount input to the input interface part.

8 . The medical device according to claim 2 , comprising a movable region detecting part that detects a motion limit of the bending movable portion on a more distal end side,

wherein the control part controls each of the bending movable portions so as to drive the bending movable portion on a distal end side when the motion limit is not detected by the movable region detecting part, and so as to drive the bending movable portion on a more proximal end side when the motion limit is detected by the movable region detecting part.

9 . A control method for a medical device comprising:

inputting an operation amount to a single input interface part, and

switching two or more movable portions in accordance with the operation amount to be driven,

wherein two or more movable portions are provided in a vicinity of a distal end portion of a long main body including the distal end portion.