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公开(公告)号：US20210367535A1
公开(公告)日：2021-11-25
申请号：US16980832
申请日：2018-10-05
发明人： Tomoo IKEDA , Izumi YAMAMOTO , Takuya SHIRAI , Yudai HOSHI
摘要： Provided are an electromechanical transducer including a light movable member that is easy to move and charged portions whose amount of electrostatic charge does not substantially change over time and a method for manufacturing such an electromechanical transducer. The electromechanical transducer using electrostatic interaction between a charged portion and a counter electrode to perform transduction between electric power and motive power includes a fixed substrate, a movable member being movable with a predetermined distance maintained between the fixed substrate and the movable member, the movable member having grooves in a surface facing the fixed substrate, the grooves being formed at intervals in a moving direction of the movable member, charged portions formed on the surface of the movable member so as to alternate with the grooves; counter electrodes disposed on a surface of the fixed substrate in the moving direction, the surface facing the movable member, and a cover layer containing copper and covering at least side walls of the movable member inside the grooves.
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公开(公告)号：US20240126212A1
公开(公告)日：2024-04-18
申请号：US18546777
申请日：2022-01-13
发明人： Yu TAKYO , Yusaku NIIDA , Takuya SHIRAI , Yosuke ABE
摘要： A mechanical timepiece includes: a hairspring; a permanent magnet; a soft magnetic core; a control circuit for performing rate adjustment based on a counter-electromotive voltage caused in a coil by a motion of the permanent magnet accompanying a forward direction motion and a reverse direction motion of the balance wheel. The permanent magnet is arranged so that, under a state in which the hairspring is brought to an equilibrium length, a direction of magnetization is directed to the first end portion side or the second end portion side.
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