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    • 8. 发明公开
    • Camera having an automatic control mechanism and piezoelectric energy conversion means
    • Kamera mit automatischer Steuerungsvorrichtung und piezo elektrischem Energieumwandler。
    • EP0000811A1
    • 1979-02-21
    • EP78300161.3
    • 1978-07-18
    • EASTMAN KODAK COMPANY (a New Jersey corporation)
    • Lee, Fitzpatrick FrankLee, James Kelly
    • G03B7/26G03B7/08
    • G03B7/083G03B7/0807G03B9/40G03B9/62
    • A camera having an automatic control mechanism, for example, an exposure control mechanism, requiring electrical energy and furnishing mechanical energy. Electrical energy requirements are normally fumished by batteries or induction generators; mechanical energy is fumished by electromagnets, motors or solenoids. Such devices are generally heavy, bulky and expensive in the context of modem cameras. Batteries require replacement.
      Electrical energy is supplied to the automatic control mechanism by a piezoelectric generator (10; 29; 135; 210; 342) which furnishes high voltage and low current Mechanical energy is supplied by a piezoelectric electrical-mechanical transducer (14; 29; 158; 212; 352) which responds to high voltage and low current.
      In its preferred form, each piezoelectric element is a piszoelectric bender which supplies electrical energy when bent and bends when electrical energy is applied to it
    • 具有自动控制机构的照相机,例如曝光控制机构,需要电能并提供机械能。 电能要求通常由电池或感应发电机组成; 机械能由电磁铁,电动机或螺线管组成。 这样的设备在现代相机的背景下通常是重的,笨重的和昂贵的。 电池需要更换。 通过提供高电压和低电流的压电发电机(10; 29; 135; 210; 342)将电能提供给自动控制机构。 机械能由压电机电换能器(14; 29; 158; 212; 352)提供,其响应于高电压和低电流。 在其优选形式中,每个压电元件是压电弯曲机,其在弯曲时提供电能并且当向其施加电能时弯曲。