Lens barrel

1. A lens barrel, comprising:

a first lens including a first optical axis;

a second lens including a second optical axis;

a support frame;

a retracting lens frame configured to support the second lens and move with respect to the support frame such that a position of the second optical axis changes from a position on the first optical axis to a position outside the first optical axis during a transition period between an imaging enabled state and a housed state;

a retraction shaft configured to be substantially parallel to the first optical axis and rotatably support the retracting lens frame with respect to the support frame; and

a first frame body disposed on one side of the support frame in a first optical axis direction and including a first housing portion, the first housing portion configured to house the retraction shaft.

2. The lens barrel according to claim 1 , wherein

the support frame includes:

a main body portion including a first region and a second region, the first region configured to dispose the second lens on the first optical axis in the imaging enabled state, the second region configured to dispose the second lens in the housed state and formed continuously with the first region, and

a first linking portion provided to the main body portion on one side of the second region in the first optical axis direction; and wherein

at least a part of the retracting lens frame is configured to overlap with the first linking portion in the housed state when viewed from the first optical axis direction.

3. The lens barrel according to claim 2 , wherein

the first frame body further includes a second housing portion, the second housing portion configured to house the first linking portion.

4. The lens barrel according to claim 3 , wherein

each of at least a part of the first housing portion and at least a part of the second housing portion includes a pass-through portion, the pass-through portion configured to pass through the first frame body in the first optical axis direction.

5. The lens barrel according to claim 4 , further comprising:

a sheet member disposed on the one side of the first frame body in the first optical axis direction, wherein

the sheet member configured to cover at least a part of the pass-through portion.

6. The lens barrel according to claim 2 , wherein

at least a part on a portion where the first linking portion opposes a curved face of the second lens, is formed so as to correspond to the curved face of the second lens.

7. The lens barrel according to claim 2 , wherein:

the support frame further includes a second linking portion, the second linking portion provided to the main body portion on the other side of the second region in the first optical axis direction; and

at least a part of the retracting lens frame is disposed between the first linking portion and the second linking portion in the housed state.

8. The lens barrel according to claim 7 , further comprising:

a second frame body disposed on the other side of the support frame in the first optical axis direction; wherein

the second frame body includes a third housing portion, the third housing portion configured to house the second linking portion.

9. The lens barrel according to claim 1 , further comprising:

a second frame body disposed on the other side of the support frame in the first optical axis direction.

10. The lens barrel according to claim 9 , wherein

the second frame body is configured to support the support frame movably in a plane that is perpendicular to the first optical axis.