Insertion device

1. An insertion device comprising:

an inserting section which is extended along a longitudinal axis;

a bending section which is provided to the inserting section, and which is bendable in first bending directions and in second bending directions which are different from the first bending directions;

a first rotating member which is configured to rotate to bend the bending section toward one of the first bending directions;

a driving member which is configured to generate an electrical driving force upon being supplied with an electric power;

an actuating unit which is configured to be actuated upon transmitting the electrical driving force generated in the driving member to the actuating unit;

a second rotating member which is coaxially arranged with a rotational axis of the first rotating member, and which is configured to rotate about the rotational axis to bend the bending section toward one of the second bending directions;

a held section casing provided to a proximal direction side of the inserting section, the first rotating member and the second rotating member being arranged inside the held section casing; and

a moving member which is arranged inside the first rotating member and the second rotating member along the rotational axis, and which is movable between a first state and a second state, the moving member being connected to both the second rotating member and the actuating unit in the first state so that the electrical driving force is transmitted from the actuating unit to the second rotating member through the moving member when the driving member generates the electrical driving force, the moving member being connected to the second rotating member but being not connected to the actuating unit in the second state so that the electrical driving force is not transmitted to the second rotating member from the actuating unit even when the driving member generates the electrical driving force, the moving member being configured to rotate integrally with the second rotating member about the rotational axis in both the first state and the second state when the second rotating member rotates,

wherein the moving member extends to an outside of the held section casing and is configured to receive an operation force from the outside of the held section casing so that the moving member moves longitudinally along the rotational axis between the first and second states.

2. The insertion device according to claim 1 , wherein the moving member includes a switching operation inputting section provided outside of the held section casing and configured to move the moving member along the rotational axis.

3. The insertion device according to claim 2 , wherein the switching operation inputting section is configured to move the moving member between a position in the first state and a position in the second state.

4. The insertion device according to claim 3 , further comprising a shaft member which is extended along the rotational axis, and which is coaxially arranged with the first rotating member and the second rotating member, the moving member being located to an outer peripheral side of the shaft member.

5. The insertion device according to claim 4 , wherein

the actuating unit includes a connecting section which is coaxially arranged with the first rotating member, the second rotating member, and the shaft member, and

the connecting section is arranged in a manner so as to cover an outer peripheral of the shaft member.

6. The insertion device according to claim 2 , further comprising:

a first manual bending operation section which is capable of inputting a first manual bending operation,

wherein:

the manual bending operation section is configured to transmit a first manual driving force to the second rotating member via the moving member by an input in the first manual bending operation section under the second state so as to rotate the second rotating member, and

the first manual driving force is transmitted from the first manual bending operation section to the moving member outside of the held section casing.

7. The insertion device according to claim 6 , wherein

the first manual bending operating section is detachably attached to the moving member via the switching operation inputting section under the second state, and

upon the input of the first manual bending operation, the first manual bending operating section is configured to rotate about the rotational axis so as to rotate the moving member and the second rotating member integrally by the first manual driving force.

8. The insertion device according to claim 7 , further comprising:

a second manual bending operation section which is coupled to the held section casing, and which is capable of inputting a second manual bending operation, upon an input of the second manual bending operation, the second manual bending operation section being configured to transmit a second manual driving force to the first rotating member so as to rotate the first rotating member.

9. The insertion device according to claim 8 , wherein the second manual bending operating section is configured to rotate about the rotational axis by the input of the second manual bending operation, and configured to rotate the first rotating member by the second manual driving force.

10. The insertion device according to claim 9 , further comprising an electric bending operation section which is coupled to the held section casing, and which is capable of inputting an electrical bending operation, under the first state, the electric bending operation section being configured to supply the electric power to the driving member upon an input of the electric bending operation, and configured to rotate the second rotating member.

11. The insertion device according to claim 10 , wherein:

the actuating unit includes a driving force receiving portion which is configured to receive the electrical driving force from the first perpendicular direction perpendicular to the longitudinal axis of the inserting section and perpendicular to the rotational axis, and

the held section casing includes a first exterior surface portion on which the electric bending operation section is placed, and which faces toward a second perpendicular direction opposite to the first perpendicular direction.

12. The insertion device according to claim 11 , wherein the held section casing includes a second exterior surface portion which faces toward a third perpendicular direction which is counterclockwise rotated for an angle of 90 degrees from the first perpendicular direction around the longitudinal axis viewed from a proximal direction, the first manual bending operation section and the second manual bending operation section being arranged on the second exterior surface portion.