Camera, control apparatus for cam drive mechanism and control method for cam drive mechanism

摘要

A camera having a mirror drive mechanism, for rotating a movable mirror, includes a slider supported on a side of the movable mirror to be linearly movable in a vertical direction corresponding to an up-and-down rotation of the movable mirror, the slider including a cam follower; an end-face cam member positioned above a mirror up-and-down pivot, about which the movable mirror pivots, to be rotatable about a vertical rotational shaft, a cam follower provided on the slider is in contact with the end-face cam member so that the end-face cam member changes a vertical position of the slider via an end-face cam and the cam follower by rotating; and an end-face cam driver.;A control apparatus for a cam drive mechanism and a method of controlling a cam drive mechanism are also provided.

主权项

1. A camera comprising:
a movable mirror which is pivoted about a mirror up-and-down pivot orthogonal to an optical axis of an imaging optical system of said camera to be rotatable between an advanced position, in which said movable mirror is positioned in an optical path of said imaging optical system and is inclined at an angle to reflect incident light emanated from an object toward a viewfinder optical system of said camera, and a retracted position, in which said movable mirror is retracted upward from said optical path to allow the object-emanated light to travel toward a shutter which is installed in a rearward position with respect to said optical path; and a mirror drive mechanism for rotating said movable mirror, wherein said mirror drive mechanism comprises: a slider which is supported on a side of said movable mirror to be linearly movable in a vertical direction that corresponds to an up-and-down rotation of said movable mirror, which rotates said movable mirror to said retracted position and said advanced position by moving upward and downward, respectively, said slider including a cam follower; an end-face cam member which is positioned above said mirror up-and-down pivot with respect to said vertical direction to be rotatable about a rotational shaft extending in said vertical direction, wherein said end-face cam member includes an end-face cam with which said cam follower is in contact, and said end-face cam member changes a position of said slider in said vertical direction via said end-face cam and said cam follower by rotating; and an end-face cam driver which rotates said end-face cam member.