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    • 41. 发明授权
    • Shutter apparatus for camera
    • 相机快门装置
    • US4851870A
    • 1989-07-25
    • US184092
    • 1988-04-20
    • Yoshihiro TanakaTetsuya UnoSadafusa TsujiHiroshi OotsukaShinichi YokoyamaTakeshi HashimotoMichihiro Iwata
    • Yoshihiro TanakaTetsuya UnoSadafusa TsujiHiroshi OotsukaShinichi YokoyamaTakeshi HashimotoMichihiro Iwata
    • G03B9/10G03B7/083G03B9/14G03B9/24
    • G03B9/14G03B7/083
    • The disclosure relates a piezoelectric element-drive type shutter apparatus for camera. The shutter apparatus includes a main piezoelectric element having a free end which is able to move between a closed position and an opening position to drive shutter blades so as to be opened and closed, and an auxiliary piezoelectric element having a free end for urging the shutter blades toward its closed position when the free end of the main piezoelectric element returns from the opening position to the closed position. When the main piezoelectric element returns to the closed position, i.e. an initial position, the auxiliary piezoelectric element assists the returning movement of the main piezoelectric element. Accordingly, the shutter blades can be closed at a very high speed. This is very effective particularly when a small aperture of the shutter blade is desired. Furthermore, since the returning movement of the main piezoelectric element includes a compulsory force of the auxiliary element as well as a returning force of itself, the returning movement of the main piezoelectric element is insured to be stable as well as speedy, so that very accurate exposure can be obtained.
    • 本发明涉及一种用于照相机的压电元件驱动型快门装置。 快门装置包括主压电元件,其具有能够在关闭位置和打开位置之间移动的自由端,以驱动快门叶片以便打开和关闭;以及辅助压电元件,其具有用于推动快门的自由端 当主压电元件的自由端从打开位置返回到关闭位置时,叶片朝向其关闭位置。 当主压电元件返回到关闭位置即初始位置时,辅助压电元件有助于主压电元件的返回运动。 因此,快门叶片可以以非常高的速度关闭。 特别是当需要快门叶片的小孔时,这是非常有效的。 此外,由于主压电元件的返回运动包括辅助元件的强制力以及其自身的返回力,所以主压电元件的返回运动保证稳定且快速,从而非常准确 可以获得暴露。
    • 42. 发明授权
    • Shutter actuating device
    • 快门启动装置
    • US4811044A
    • 1989-03-07
    • US207930
    • 1988-06-16
    • Yoshihiro TanakaSadafusa TsujiHiroshi Ootsuka
    • Yoshihiro TanakaSadafusa TsujiHiroshi Ootsuka
    • G03B7/08G03B7/083G03B7/26G03B9/14
    • G03B9/14G03B7/0807G03B7/083G03B7/26
    • A shutter actuating device of the type employing a piezoelectric element as an actuating element which attains stabilization of the shutter opening speed of a shutter device. The device includes a piezoelectric element charging circuit which charges a piezoelectric element with constant current so that the rising speed of the charged voltage of the piezoelectric element may be maintained constant. Means is also disclosed for minimizing a time lag until a minimum aperture for exposure is reached after triggering of a shutter release operation. Higher constant charging current is supplied to the piezoelectric element until a time just before the minimum aperture for exposure is presented, and after then the piezoelectric element is charged with lower constant current.
    • 一种使用压电元件作为致动元件的快门致动装置,其实现快门装置的快门打开速度的稳定。 该装置包括一个压电元件充电电路,其对恒定电流的压电元件进行充电,使压电元件的充电电压的上升速度保持恒定。 还公开了用于在触发快门释放操作之后到达最小曝光孔径之前使时间滞后最小化的装置。 更高的恒定充电电流被提供给压电元件,直到呈现最小曝光孔径之前的时间,然后在较低的恒定电流下对压电元件充电。
    • 50. 发明申请
    • TIRE DESIGN METHOD
    • 轮胎设计方法
    • US20080302466A1
    • 2008-12-11
    • US12132006
    • 2008-06-03
    • Naoya AgeishiYoshihiro TanakaKen Ishihara
    • Naoya AgeishiYoshihiro TanakaKen Ishihara
    • B29D30/06G06N3/12
    • G06F17/5018B60C11/0306B60C99/006G06F17/5095
    • A tire is designed using a tire FEM model by obtaining an optimal solution for a tire structure which optimizes an objective function with a tread pattern shape kept fixed and performing a numerical optimization for obtaining an optimal solution for the tread pattern shape which optimizes the objective function with the tire structure kept fixed. The optimization for the tire structure is performed using a tire model having a tread pattern shape optimized at the immediately preceding cycle of the operation of optimizing the tread pattern shape. The optimization for the tread pattern shape is performed using a tire model having a tire structure optimized at the preceding cycle of the operation of optimizing the tire structure. The optimizing operations are repeated until convergence of optimal solutions obtained by those operations takes place.
    • 使用轮胎FEM模型设计轮胎,通过获得轮胎结构的最佳解决方案,其优化目标函数,其中胎面花纹形状保持固定并执行数值优化,以获得优化目标函数的胎面花纹形状的最优解 轮胎结构保持固定。 轮胎结构的优化使用具有在优化胎面花纹形状的操作的最前一周期优化的胎面花纹形状的轮胎模型来进行。 用轮胎模型进行胎面花纹形状的优化,该轮胎模型具有在优化轮胎结构的操作的前一循环处优化的轮胎结构。 重复优化操作,直到发生由这些操作获得的最优解的收敛。