Back to results
US 4,728,979 AGranted
Apparatus for exposure control/focus adjustment for camera
AssigneeOlympus Optical Co., Ltd.
InventorsHiroshi Akitake, Toshimasa Akagi, Gouichi Hiratsuka, Tatsuya Suzuki
Life of this patent
Estimating the term…
Abstract
Apparatus for exposure control/focus adjustment for a camera comprises an exposure controlling mechanism, a focus adjusting mechanism and a source of rotary drive. The drive from the source is transmitted through a differential gearing to the exposure controlling mechanism and the focus adjusting mechanism. The differential gearing is operated such that the transmission of the drive to either one of the exposure controlling mechanism and the focus adjusting mechanism is blocked while allowing the other mechanism to be driven.
Claims23
Apparatus for exposure control/focus adjustment for a camera comprising:
- an exposure controlling mechanism for controlling the amount of incident light which passes through a taking lens for the purpose of taking a picture;
- a focus adjusting mechanism for properly controlling the distance to an object being photographed;
- a source of rotary drive continuously operating throughout the performance of the exposure control/focus operations for operating the exposure controlling mechanism and the focus adjusting mechanism;
- and
- drive transmission means for transmitting the rotary drive from the source to the exposure controlling mechanism and the focus adjusting mechanism through a differential gearing and for selectively driving either one of the mechanisms responsive to changes in the load upon the exposure controlling mechanism and the focus adjusting mechanism.
2 more elements
Apparatus for exposure control/focus adjustment for a camera comprising:
- an exposure controlling mechanism for controlling the amount of incident light which passes through a taking lens for the purpose of taking a picture;
- a focus adjusting mechanism for properly controlling the distance to an object being photographed;
- a source of rotary drive for operating the exposure controlling mechanism and the focus adjusting mechanism;
- and
- drive transmission means for transmitting the rotary drive from the source to the exposure controlling mechanism and the focus adjusting mechanism through a differential gearing and for selectively driving either one of the mechanisms responsive to changes in the load upon the exposure controlling mechanism and the focus adjusting mechanism;
- said differential gearing comprising a gear of large diameter disposed for meshing engagement with an output gear which rotates in one direction and to which a rotating drive from the source is transmitted, a second gear of a large diameter rotatably disposed around a gear of a small diameter which is coaxially and integrally mounted with the first mentioned gear, a plurality of planet gears rotatably mounted on a plurality of support shafts which are fixedly mounted on one side of the second gear at equal angular intervals and disposed for meshing engagement with the gear of a small diameter, and an internal gear having internal teeth which are disposed for meshing engagement with the planet gears.
3 more elements
Apparatus for exposure control/focus adjustment for a cameral having an adjustable taking lens and a shutter mechanism, comprising:
- an exposure controlling mechanism operating the shutter mechanism to control the amount of incident light which passes through the taking lens;
- a focus adjusting mechanism operating the taking lens responsive to the distance between the camera and an object being photographed;
- a drive source having an output which continuously moves in a given direction during the exposure control/focus operation for operating the exposure controlling mechanism and the focus adjusting mechanism;
- a differential gear mechanism for selectively coupling drive from the drive source to the exposure controlling mechanism and the focus adjusting mechanism;
- and
- a solenoid for interrupting operation of one of the exposure controlling mechanism and the focus adjusting mechanism by selectively interconnecting only of said exposure control and focus adjusting elements to the drive means.
3 more elements
Apparatus for exposure control/focus adjustment for a camera comprising:
- an exposure controlling mechanism for controlling he amount of incident light which passes through a taking lens;
- a focus adjusting mechanism for properly controlling the distance to an object being photographed;
- a drive source having an output which continuously moves in a given direction during the exposure control/focus operation for operating both the exposure controlling mechanism and the focus adjusting mechanism;
- and a differential gear mechanism for selectively transmitting drive from the drive source to the exposure controlling mechanism and the focus adjusting mechanism;
- rotation interrupting means being provided only on the exposure controlling mechanism and a load for the focus adjusting mechanism undergoing a change sufficient to cause the differential gear mechanism to drive the exposure controlling mechanism when the rotation interrupting means is inoperative.
2 more elements
Apparatus for exposure control/focus adjustment for a camera comprising:
- an exposure control mechanism for controlling the amount of incident light passing through a taking lens provided in the camera;
- a focus adjusting mechanism for adjusting the taking lens of the camera responsive to the distance between the camera and an object being photographed;
- a single drive source continuously operating in a given direction during the exposure control/focus control operation for selectively operating the exposure controlling mechanism and the focus adjusting mechanism;
- differential gear means coupled between said drive source and said focus adjusting mechanism and said exposure controlling mechanism and responsive to a change in the load imposed by one of the aforesaid mechanism upon said differential gear mechanism for causing the differential gear mechanism to terminate driving energy to the mechanism whose load has significantly changed and for delivering the drive to the remaining one of said mechanisms.
1 more element
Dependencies are inferred from the claim text.