Patent ID: 8264556

Claim:
A lens barrel unit, comprising: a photographic optical system; a drive force generating unit that generates a drive force with which the photographic optical system is caused to move along a direction of an optical axis of the photographic optical system; a drive mechanism that moves the photographic optical system with the drive force received from the drive force generating unit; an image-capturing element mounting portion on which an image-capturing element that captures an image obtained through the photographic optical system is mounted; a vibration detection device that detects vibration, and is disposed in a space defined between an outer perimeter of the lens barrel unit and an outer perimeter of the image-capturing element mounting portion in a direction perpendicular to the optical axis, with the outer perimeter of the lens barrel unit being larger than the outer perimeter of the image-capturing element mounting portion; and an end member that is provided transverse to the optical axis at an end of the lens barrel unit toward the image-capturing element, the end member having a portion with a flat plate shape with a surface of the portion with the flat plate shape facing toward the image-capturing element, wherein the image-capturing element mounting portion is formed on the end member in a region surrounding the optical axis so as to project toward the image-capturing element from the end member, the drive force generating unit comprises a first actuator and a second actuator, with an extent of vibration caused by operation of the second actuator being greater than an extent of vibration caused by operation of the first actuator, the second actuator and the vibration detection device are disposed on the surface of the portion with the flat plate shape of the end member facing toward the image-capturing element at positions facing opposite each other over the image-capturing element mounting portion, and the vibration detection device is disposed on a board connected to the surface of the portion with the flat plate shape of the end member facing toward the image-capturing element, and is positioned in the space so as to overlap the image-capturing element mounting portion in the direction perpendicular to the optical axis.