公开(公告)号：US5432658A

公开(公告)日：1995-07-11

申请号：US6261

申请日：1993-01-19

申请人： Nobuyuki Kajita ,  Takamasa Uejima

发明人： Nobuyuki Kajita ,  Takamasa Uejima

IPC分类号： G11B5/588 ,  G11B21/10

CPC分类号： G11B5/588

摘要： In a rotary-magnetic-head dynamic track following device of the present invention, a coil for generating a controlling magnetic field that shifts a magnetic head along its rotation axis, a magnet for generating a constant magnetic field, a yoke section for allowing the constant magnetic field to form a closed loop (for example, an upper yoke and a lower yoke) are installed in a ring shape around the rotation axis. The lower drum also functions as a fixed drum. A head support member, which has spiral grooves formed along its outer edge section, is fixed to the bottom face of the outer circumferential wall of the upper drum. The upper drum and a rotary transformer core section are fixed to a rotary cylinder, and thus rotated together with a motor section and the head support member as one unit. This arrangement makes it possible to achieve compactness of the rotary-magnetic-head dynamic track following device as well as providing superior performances such as: a better response characteristic of the head displacement adjusting mechanism; reduction of slide resistance of the magnetic tape; and reduced power consumption.

摘要翻译： 在本发明的旋转磁头动态跟踪装置中，用于产生沿其旋转轴移动磁头的控制磁场的线圈，用于产生恒定磁场的磁体，用于允许恒定磁场的磁轭部分 形成闭环的磁场（例如，上磁轭和下磁轭）围绕旋转轴线安装成环形。 下鼓也用作固定鼓。 具有沿其外边缘部分形成的螺旋槽的头部支撑构件固定在上部鼓的外周壁的底面上。 上滚筒和旋转变压器芯部分固定在旋转圆筒上，因此与马达部分和头部支撑部件一起作为一个单元旋转。 这种布置使得可以实现旋转磁头动态跟踪装置的紧凑性以及提供优异的性能，例如：头位移调节机构的更好的响应特性; 降低磁带的滑动阻力; 并降低功耗。

公开(公告)号：US5805371A

公开(公告)日：1998-09-08

申请号：US626411

申请日：1996-04-02

申请人： Takamasa Uejima ,  Tohru Minagawa

发明人： Takamasa Uejima ,  Tohru Minagawa

IPC分类号： G11B15/03 ,  G11B15/18 ,  G11B15/20 ,  G11B27/10 ,  G11B27/17 ,  G11B27/28 ,  G11B27/30

CPC分类号： G11B15/1875 ,  G11B15/03 ,  G11B27/107 ,  G11B27/17 ,  G11B27/3027 ,  G11B15/20 ,  G11B2220/90

摘要： A magnetic recording/reproducing apparatus includes a mechanism body, a control circuit, and a memory circuit. The mechanism body has a loading mechanism, a tape traveling mechanism, and a reel revolution count detection mechanism for outputting a signal corresponding to a revolution count of the reel. The control circuit drive-controls the loading mechanism and the tape traveling mechanism, calculates a cumulative revolution count of the reel from an output of the reel revolution count detection mechanism, and controls recording and reproduction of data, including a video signal and a track number, on and from the magnetic tape. The memory circuit stores the cumulative revolution count of the reel and the track number upon recording and reproduction of the data on and from the magnetic tape. The control circuit reads out form the memory circuit a cumulative revolution count of the reel corresponding to a track number of a target position to which the magnetic tape is to be positioned, compares the readout cumulative revolution count with the cumulative revolution count of the reel of the magnetic tape that travels in a non-contact state with respect to the rotary drum, and positions the magnetic tape.

摘要翻译： 磁记录/再现装置包括机构体，控制电路和存储电路。 机构主体具有加载机构，带移动机构和用于输出与卷轴的转数相对应的信号的卷轴转数检测机构。 控制电路驱动 - 控制装载机构和磁带移动机构，从卷轴转数检测机构的输出计算卷轴的累积转数，并且控制包括视频信号和磁道号的数据的记录和再现 ，磁带上和从磁带。 存储电路在磁带上记录和再现数据时存储卷轴的累积转数和磁道号。 控制电路从存储器电路读出对应于磁带所在的目标位置的磁道号的卷轴的累积转数，将读出的累积转数与卷轴的累积转数进行比较 磁带相对于旋转滚筒以非接触状态行进，并定位磁带。

公开(公告)号：US5036412A

公开(公告)日：1991-07-30

申请号：US308820

申请日：1989-02-10

申请人： Kenichi Shiraishi ,  Takamasa Uejima ,  Hironobu Katayama

发明人： Kenichi Shiraishi ,  Takamasa Uejima ,  Hironobu Katayama

IPC分类号： G11B15/61 ,  G11B15/665

CPC分类号： G11B15/61 ,  G11B15/6656

摘要： A magnetic recording and reproducing apparatus which includes a set of loading members for drawing out a magnetic tape accommodated in a tape cassette and wound around a set of reels disposed to contact the same plane. The tape storing portions of the tape cassette are directed along part of the outer peripheral surface of a rotary head cylinder in an approximately M-shape, and a single inclining member is provided in the vicinity of one tape storing portion for causing a tape travelling reference face of the magnetic tape drawn out from the tape storing portion to be inclined. The first loading member corresponding to the tape storing portion is rotatably supported at right angles with respect to the tape travelling reference face of the magnetic tape inclined by the inclining member, while the other loading member corresponding to the other tape storing portion is rotatably supported at right angles with respect to the tape travelling reference face of the magnetic tape drawn out from the other tape storing portion.