Lens barrel including a flexible printed wiring board

1. A lens barrel comprising:

an electronic component provided in said lens barrel so that a position of said electronic component in said lens barrel is adjustable;

a flexible printed wiring board connected to said electronic component and installed to extend along a surface of an internal component of said lens barrel in a direction to adjust said position of said electronic component; and

a low-repulsion layer interposed between said surface of said internal component and a surface of said flexible printed wiring board which faces said surface of said internal component.

2. The lens barrel according to claim 1 , wherein one and the other sides of said low-repulsion layer are in intimate contact with said surface of said internal component and said surface of said flexible printed wiring board, respectively.

3. The lens barrel according to claim 2 , wherein said low-repulsion layer is integral with said surface of said flexible printed wiring board.

4. The lens barrel according to claim 2 , wherein said low-repulsion layer is integral with said surface of said internal component.

5. The lens barrel according to claim 1 , wherein said position of said electronic component is adjustable in a circumferential direction about an optical axis of said lens barrel,

wherein said internal component comprises a cylindrical member, said surface of said internal component being a peripheral surface of said cylindrical member about said optical axis, and

wherein said flexible printed wiring board is installed to extend in said circumferential direction along said peripheral surface of said cylindrical member.

6. The lens barrel according to claim 5 , wherein said cylindrical member comprises a lens frame which supports a lens group.

7. The lens barrel according to claim 5 , wherein said electronic component comprises a motor for changing f-number of a diaphragm unit provided in said lens barrel, and

wherein said position of said motor is adjustable in said circumferential direction.

8. The lens barrel according to claim 7 , wherein said motor is mounted to a motor mounting member which is secured to said cylindrical member by set screws, and

wherein a position of said motor mounting member relative to said cylindrical member can be adjusted with said set screws being loosened.

9. The lens barrel according to claim 5 , wherein said cylindrical member comprises a first lens frame which supports a lens group,

wherein said electronic component comprises a motor for changing f-number of a diaphragm unit provided in said lens barrel,

wherein said position of said motor is adjustable in said circumferential direction, and

wherein said lens barrel further comprises a second lens frame, which is greater in diameter than said first lens frame, arranged coaxially with said first lens frame and movable in said optical axis direction to move into and out of a space around said flexible printed wiring board.

10. The lens barrel according to claim 1 , wherein said flexible printed wiring board is connected at one end and the other end thereof to said electronic component and a portion of said lens barrel, respectively.

11. The lens barrel according to claim 1 , wherein said low-repulsion layer is made of a resilient soft foam.

12. The lens barrel according to claim 1 , wherein said electronic component comprises a motor with a rotary output shaft which extends in a direction parallel to an optical axis of said lens barrel.

13. The lens barrel according to claim 1 , wherein said flexible printed wiring board is elongated in said adjusting direction and formed in a C-shaped strip about an optical axis of said lens barrel.

14. A lens barrel comprising:

a cylindrical member positioned around an optical axis of said lens barrel;

an electronic component provided in said lens barrel;

a mounting member to which said electronic component is mounted in a manner such that a position of said mounting member relative to said cylindrical member in a circumferential direction about said optical axis is adjustable;

a flexible printed wiring board connected to said electronic component and installed to extend along an outer peripheral surface of said cylindrical member in said circumferential direction; and

a low-repulsion layer formed integral with an inner surface of said flexible printed wiring board, which faces said outer peripheral surface of said cylindrical member.