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US 7,070,343 B2Granted
Sector drive assembly for camera
AssigneeSeiko Precision Inc.
InventorsYoichi Nakano, Hiroshi Takahashi
Life of this patent
Estimating the term…
Abstract
A sector drive assembly for a camera with reduced power consumption has a base plate having an aperture, one or more sectors capable of opening and closing the aperture, an electromagnetic actuator for driving the sectors, a drive force transmitting mechanism for transmitting a drive force of the electromagnetic actuator to the sectors, a first detecting unit for detecting when the sectors are open, and a second detecting unit for detecting when the sectors are closed, wherein the supply of power to the electromagnetic actuator is controlled based on signals from the first and the second detecting units.
Claims19
A sector drive assembly for a camera comprising:
- a base plate having an aperture;
- one or more sectors provided on the base plate for opening and closing the aperture;
- an electromagnetic actuator for driving the one or more sectors between an open position in which the aperture is opened and a closed position in which the aperture is closed;
- a drive force transmitting mechanism for transmitting a drive force of the electromagnetic actuator in aperture-opening and aperture-closing directions to the one or more sectors;
- a first detecting unit for detecting a state in which the one or more sectors are in the open position, the first detecting unit including an electrically conductive detection pin, and a first electrically conductive detection spring engageable with the conductive detection pin and urging the drive force transmitting mechanism in the aperture-closing direction when the one or more sectors are in the open position;
- a second detecting unit for detecting a state in which the one or more sectors are in the closed position, the second detecting unit including the electrically conductive detection pin, and a second electrically conductive detection spring engageable with the conductive detection pin and urging the drive force transmitting mechanism in the aperture-opening direction when the one or more sectors are in the closed position;
- and
- a control unit for controlling the supply of power to the electromagnetic actuator based on signals from the first and the second detecting units.
5 more elements
A sector drive assembly for a camera, comprising:
- a sector unit comprising a base plate having an aperture, and one or more sectors for opening and closing the aperture;
- and
- a sector driving unit removably mounted as a unit to the base plate and comprising a support plate, an electromagnetic actuator mounted to the support plate, a drive force transmitting mechanism mounted to the support plate for transmitting a drive force of the electromagnetic actuator in aperture-opening and aperture-closing directions to the one or more sectors, a first sector position detecting unit for detecting an open position of the one or more sectors, the first sector position detecting unit including an electrically conductive detection pin, and a first electrically conductive detection spring engageable with the conductive detection pin and urging the drive force transmitting mechanism in the aperture-closing direction when the one or more sectors are in the open position, and a second sector position detecting unit for detecting a closed position of the sectors, the second sector position detecting unit including the electrically conductive detection pin, and a second electrically conductive detection spring engageable with the conductive detection pin and urging the drive force transmitting mechanism in the aperture-opening direction when the one or more sectors are in the closed position.
A sector drive assembly for a camera comprising:
- a base plate having an aperture;
- one or more sectors provided on the base plate for
- opening and closing the aperture;
- an electromagnetic actuator for driving the one or more sectors between an open position in which the aperture is opened and a closed position in which the aperture is closed;
- a drive force transmitting mechanism for transmitting a drive force of the electromagnetic actuator in aperture-opening and aperture-closing directions to the one or more sectors;
- a first detecting unit for detecting a state in which the one or more sectors are in the open position, the first detecting unit including a first electrically conductive detection pin, and a first electrically conductive detection spring engageable with the first conductive detection pin and urging the drive force transmitting mechanism in the aperture-closing direction when the one or more sectors are in the open position;
- a second detecting unit for detecting a state in which the one or more sectors are in the closed position, the second detecting unit including a second electrically conductive detection pin, and a second electrically conductive detection spring engageable with the second conductive detection pin and urging the drive force transmitting mechanism in the aperture-opening direction when the one or more sectors are in the closed position;
- and
- a control unit for controlling the supply of power to the electromagnetic actuator based on signals from the first and the second detecting units.
6 more elements
Dependencies are inferred from the claim text.