JP2007071989A5 - - Google Patents

Claims (8)

A fixed frame and a cam cylinder are fitted on the outer periphery of the sliding frame holding the optical lens group, and the sliding frame is moved back and forth along the optical axis with respect to the fixed frame by the rotation of the cam cylinder. In a lens barrel that moves in the direction,
The sliding frame is divided in the front-rear direction into two sliding part frames, one of which holds the optical lens group,
The two sliding part frames are biased in a direction away from each other by a biasing means,
Two cam pins are erected on each of the two sliding part frames,
At least one of the cam pins is fitted with a roller that engages with the straight groove of the fixed cylinder and the cam groove of the cam cylinder,
A lens barrel characterized in that a diameter of a roller portion which is at least engaged with the cam groove and is integral with the optical lens group is adjustable. The lens barrel according to claim 1,
A plurality of rollers that can adjust the diameter and cam pins that support the rollers are provided in the circumferential direction.
The lens barrel characterized in that the roller whose diameter is adjustable and the cam pin that supports the roller are part of a flange back adjustment mechanism for adjusting the flange back of the lens barrel.   A sliding frame having a first portion that is provided on the inner peripheral side of the fixed frame having a rectilinear groove and holds the optical lens group, and a second portion that is provided between the fixed frame and the first portion;
  Biasing means for biasing the first part and the second part in a direction away from each other;
  A cam cylinder having a cam groove and provided on the outer peripheral side of the fixed frame;
  A first cam pin that is erected on the first portion and that engages with the rectilinear groove of the fixed frame and the cam groove of the cam cylinder;
  A lens barrel, comprising: a rectilinear groove of the fixed frame, and a second cam pin engaging with the cam groove of the cam barrel.   In the lens barrel according to claim 3,
  The lens barrel, wherein the first portion is provided at a distance from the second portion in the optical axis direction of the optical lens group.   In the lens barrel according to claim 3 or 4,
  A lens barrel comprising a roller provided on an outer periphery of at least one of the first cam pin and the first cam pin.   In the lens barrel according to any one of claims 1, 2, and 5,
  The lens barrel includes: a first roller portion that engages with the rectilinear groove; and a second roller portion that is separate from the first roller portion that engages with the cam groove.   A camera comprising the lens barrel according to any one of claims 1 to 6.   A video comprising the lens barrel according to any one of claims 1 to 6.