Lens barrel unit

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.