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公开(公告)号：US4851870A
公开(公告)日：1989-07-25
申请号：US184092
申请日：1988-04-20
申请人： Yoshihiro Tanaka , Tetsuya Uno , Sadafusa Tsuji , Hiroshi Ootsuka , Shinichi Yokoyama , Takeshi Hashimoto , Michihiro Iwata
发明人： Yoshihiro Tanaka , Tetsuya Uno , Sadafusa Tsuji , Hiroshi Ootsuka , Shinichi Yokoyama , Takeshi Hashimoto , Michihiro Iwata
摘要： 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.
摘要翻译： 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。
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公开(公告)号：US4873544A
公开(公告)日：1989-10-10
申请号：US203891
申请日：1988-06-08
申请人： Yoshihiro Tanaka , Sadafusa Tsuji , Yoshiaki Hata , Manabu Inoue , Hiroshi Ootsuka , Michihiro Iwata , Fumiaki Ishito , Koh Hayama
发明人： Yoshihiro Tanaka , Sadafusa Tsuji , Yoshiaki Hata , Manabu Inoue , Hiroshi Ootsuka , Michihiro Iwata , Fumiaki Ishito , Koh Hayama
CPC分类号： G03B9/08
摘要： A photographic camera of the type including a piezo-electric actuating element driven by energy accumulated in a capacitor for actuating a shutter wherein the piezo-electric element operates in stability to assure accurate appropriate opening and closing operation of the shutter of the camera and the capacitor is charged up rapidly to allow subsequent photographing operation to be done in a minute. In the camera, a charged voltage of the capacitor is checked several times to determine if it is sufficient to assure proper operation of the piezo-electric element, and if a then required level is not reached, then the capacitor is charged to the required voltage. While the capacitor is being charged, charging of a capacitor for a flash is inhibited. For operation of the shutter, a negative voltage is first applied across the piezo-electric element to set the same to its fixed home position, and then a positive voltage is applied to move the shutter from the home position to a predetermined opening position, whereafter the negative voltage is applied again to return the shutter to its initial position rapidly. The position of the shutter is also checked to assure proper operation of the camera.
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公开(公告)号：US4963916A
公开(公告)日：1990-10-16
申请号：US203892
申请日：1988-06-08
申请人： Yoshihiro Tanaka , Sadafusa Tsuji , Yoshiaki Hata , Manabu Inoue , Hiroshi Ootsuka , Michihiro Iwata , Fumiaki Ishito , Koh Hayama
发明人： Yoshihiro Tanaka , Sadafusa Tsuji , Yoshiaki Hata , Manabu Inoue , Hiroshi Ootsuka , Michihiro Iwata , Fumiaki Ishito , Koh Hayama
CPC分类号： G03B9/08
摘要： A photographic camera of the type including a piezo-electric actuating element driven by energy accumulated in a capacitor for actuating a shutter wherein the piezo-electric element operates in stability to assure accurate appropriate opening and closing operation of the shutter of the camera and the capacitor is charged up rapidly to allow subsequent photographing operation to be done in a minute. In the camera, a charged voltage of the capacitor is checked several times to determine if it is sufficient to assure proper operation of the piezoelectric element, and if a then required level is not reached, then the capacitor is charged to the required voltage. While the capacitor is being charged, charging of a capacitor for a flash is inhibited. For operation of the shutter, a negative voltage is first applied across the piezo-electric element to set the same to its fixed home position, and then a positive voltage is applied to move the shutter from the home position to a predetermined opening position, whereafter the negative voltage is applied again to return the shutter to its initial position rapidly. The position of the shutter is also checked to assure proper operation of the camera.
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公开(公告)号：US4882602A
公开(公告)日：1989-11-21
申请号：US203937
申请日：1988-06-08
申请人： Yoshihiro Tanaka , Sadafusa Tsuji , Yoshiaki Hata , Manabu Inoue , Hiroshi Ootsuka , Michihiro Iwata , Fumiaki Ishito , Koh Hayama
发明人： Yoshihiro Tanaka , Sadafusa Tsuji , Yoshiaki Hata , Manabu Inoue , Hiroshi Ootsuka , Michihiro Iwata , Fumiaki Ishito , Koh Hayama
CPC分类号： G03B9/08
摘要： A photographic camera of the type including a piezo-electric actuating element driven by energy accumulated in a capacitor for actuating a shutter wherein the piezo-electric element operates in stability to assure accurate appropriate opening and closing operation of the shutter of the camera and the capacitor is charged up rapidly to allow subsequent photographing operation to be done in a minute. In the camera, a charged voltage of the capacitor is checked several times to determine if it is sufficient to assure proper operation of the piezo-electric element, and if a then required level is not reached, then the capacitor is charged to the required voltage. While the capacitor is being charged, charging of a capacitor for a flash is inhibited. For operation of the shutter, a negative voltage is first applied across the piezo-electric element to set the same to its fixed home position, and then a positive voltage is applied to move the shutter from the home position to a predetermined opening position, whereafter the negative voltage is applied again to return the shutter to its initial position rapidly. The position of the shutter is also checked to assure proper operation of the camera.
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公开(公告)号：US4868597A
公开(公告)日：1989-09-19
申请号：US243129
申请日：1988-09-08
申请人： Yoshihiro Tanaka , Sadafusa Tsuji , Yoshiaki Hata , Manabu Inoue , Hiroshi Ootsuka , Michihiro Iwata , Fumiaki Ishito , Koh Hayama
发明人： Yoshihiro Tanaka , Sadafusa Tsuji , Yoshiaki Hata , Manabu Inoue , Hiroshi Ootsuka , Michihiro Iwata , Fumiaki Ishito , Koh Hayama
CPC分类号： G03B9/08
摘要： A photographic camera of the type including a piezo-electric actuating element driven by energy accumulated in a capacitor for actuating a shutter wherein the piezo-electric element operates in stability to assure accurate appropriate opening and closing operation of the shutter of the camera and the capacitor is charged up rapidly to allow subsequent photographing operation to be done in a minute. In the camera, a charged voltage of the capacitor is checked several times to determine if it is sufficient to assure proper operation of the piezo-electric element, and if a then required level is not reached, then the capacitor is charged to the required voltage. While the capacitor is being charged, charging of a capacitor for a flash is inhibited. For operation of the shutter, a negative voltage is first applied across the piezo-electric element to set the same to its fixed home position, and then a positive voltage is applied to move the shutter from the home position to a predetermined opening position, whereafter the negative voltage is applied again to return the shutter to its initial position rapidly. The position of the shutter is also checked to assure proper operation of the camera.
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公开(公告)号：US4868595A
公开(公告)日：1989-09-19
申请号：US273724
申请日：1988-11-17
申请人： Yoshihiro Tanaka , Sadafusa Tsuji , Yoshiaki Hata , Manabu Inoue , Hiroshi Ootsuka , Michihiro Iwata , Fumiaki Ishito , Koh Hayama
发明人： Yoshihiro Tanaka , Sadafusa Tsuji , Yoshiaki Hata , Manabu Inoue , Hiroshi Ootsuka , Michihiro Iwata , Fumiaki Ishito , Koh Hayama
CPC分类号： G03B9/08
摘要： A photographic camera of the type including a piezo-electric actuating element driven by energy accumulated in a capacitor for actuating a shutter wherein the piezo-electric element operates in stability to assure accurate appropriate opening and closing operation of the shutter of the camera and the capacitor is charged up rapidly to allow subsequent photographing operation to be done in a minute. In the camera, a charged voltage of the capacitor is checked several times to determine if it is sufficient to assure proper operation of the piezo-electric element, and if a then required level is not reached, then the capacitor is charged to the required voltage. While the capacitor is being charged, charging of a capacitor for a flash is inhibited. For operation of the shutter, a negative voltage is first applied across the piezo-electric element to set the same to its fixed home position, and then a positive voltage is applied to move the shutter from the home position to a predetermined opening position, whereafter the negative voltage is applied again to return the shutter to its initial position rapidly. The position of the shutter is also checked to assure proper operation of the camera.
摘要翻译： 一种照相机，其类型包括由积累在用于致动快门的电容器中的能量驱动的压电致动元件，其中压电元件稳定地操作以确保相机和电容器的快门的精确的适当的打开和关闭操作 充电充电以允许随后的拍摄操作在一分钟内完成。 在相机中，检查电容器的充电电压几次以确定是否足以确保压电元件的正常工作，并且如果未达到所需的电平，则将电容器充电至所需电压 。 当电容器正在充电时，禁止对闪光灯的电容器充电。 对于快门的操作，首先在压电元件上施加负电压以将其设定为其固定的原始位置，然后施加正电压以将快门从原始位置移动到预定的打开位置，此后 再次施加负电压以快速将快门返回到其初始位置。 还检查快门的位置以确保相机的正常操作。
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公开(公告)号：US4811044A
公开(公告)日：1989-03-07
申请号：US207930
申请日：1988-06-16
CPC分类号： G03B9/14 , G03B7/0807 , G03B7/083 , G03B7/26
摘要： 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.
摘要翻译： 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。
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公开(公告)号：US5130733A
公开(公告)日：1992-07-14
申请号：US617025
申请日：1990-11-21
申请人： Nobuyuki Taniguchi , Yoshinobu Kudo , Manabu Inoue , Michihiro Iwata , Shigeru Wada , Hiroshi Ootsuka , Shinichi Yokoyama
发明人： Nobuyuki Taniguchi , Yoshinobu Kudo , Manabu Inoue , Michihiro Iwata , Shigeru Wada , Hiroshi Ootsuka , Shinichi Yokoyama
CPC分类号： G03B17/24 , G03B13/12 , G03B17/20 , G03B2206/004
摘要： A camera with its taking optical system having two alternative, large and small, focal lengths and its finder optical system so contrived that the image formed as its focal length is varied continuously is visible through the finder, the latter included in a zoom optical system. The camera calculates the magnification of the image in the finder the photographer intends after seeing it and the focal length selected by him with the condition of the finder's optical system taken into account, and the result is recorded in the film are trimming information at the time of photographing. At the time of printing the photographed image is trimmed according to the angle of vision determined on the basis of the trimming information.
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公开(公告)号：US5798625A
公开(公告)日：1998-08-25
申请号：US509063
申请日：1995-07-31
CPC分类号： H02P7/18 , H02K11/23 , H02K23/36 , H02K23/66 , Y10S388/93
摘要： A dc motor wherein a driving force thereof can be used effectively with a simple and compact mechanical construction and a motor controlling system which can control such a dc motor to be driven efficiently. The motor comprises at least two coils, and change-over means for changing electric connection of the coils to change over the motor, when power is selectively supplied to the coils, between a first mode in which the torque produced is relatively high and the rotational frequency is relatively low and a second mode in which the torque is relatively low and the rotational frequency is relatively high. The motor controlling system includes selecting means for automatically selecting one of the first and second modes to control the change-over means in response to a given condition of the motor.
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公开(公告)号：US5461694A
公开(公告)日：1995-10-24
申请号：US727101
申请日：1991-07-09
CPC分类号： H02P7/18 , H02K11/23 , H02K23/36 , H02K23/66 , Y10S388/93
摘要： A dc motor wherein a driving force thereof can be used effectively with a simple and compact mechanical construction and a motor controlling system which can control such a dc motor to be driven efficiently. The motor comprises at least two coils, and change-over means for changing electric connection of the coils to change over the motor, when power is selectively supplied to the coils, between a first mode in which the torque produced is relatively high and the rotational frequency is relatively low and a second mode in which the torque is relatively low and the rotational frequency is relatively high. The motor controlling system includes selecting means for automatically selecting one of the first and second modes to control the change-over means in response to a given condition of the motor.
摘要翻译： 一种直流电动机，其驱动力可以用简单且紧凑的机械结构有效地使用，并且可以有效地控制这种直流电动机的电动机控制系统。 电动机包括至少两个线圈，以及转换装置，用于在所产生的扭矩相对较高的第一模式和旋转的转动之间，当选择性地向线圈供电时，改变线圈的电连接以改变电动机 频率相对较低，并且转矩相对较低并且旋转频率相对较高的第二模式。 电动机控制系统包括选择装置，用于根据电动机的给定状况自动选择第一和第二模式之一来控制转换装置。
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