公开(公告)号：US4139871A

公开(公告)日：1979-02-13

申请号：US634910

申请日：1975-11-24

申请人： Takeshi Yoshida ,  Yukio Kameyama ,  Hitoshi Masuko ,  Keiichi Yaguchi

发明人： Takeshi Yoshida ,  Yukio Kameyama ,  Hitoshi Masuko ,  Keiichi Yaguchi

IPC分类号： G11B15/14 ,  H04N5/785 ,  G11B21/06

CPC分类号： G11B15/14

摘要： In a magnetic video tape recording and reproducing apparatus (VTR) having rotary magnetic video heads rotating in a direction substantially perpendicular to the direction of tape travel, the width of the magnetic tape is reduced substantially to one inch from the conventional two inches, and eight video heads for recording a video signal on the magnetic tape and for reproducing the video signal from the magnetic tape are mounted on the circumferential surface of a rotary head drum having a diameter substantially equal to two inches and are arranged to be equidistant from one another in the direction of circumference of the rotary head drum. According to this invention, a compact VTR can be realized. In addition, the video signal may be transferred to and from the rotary head drum alternately through one of two circuit paths composed of a signal coupling means and an input/output circuit respectively, in order to realize a more compact, light weight and low power consumption VTR. Further, in order to improve the tape tracking accuracy in the case of such a narrow-width video head, use is made of a control signal whose n cycles of pulses in a pulse series obtained from a drum tachometer pulse are eliminated when a frame reference signal occurs so as to multiplex the pulse series with the frame reference signal. A control signal track is disposed at or around the minimum stretch portion or the center of the magnetic tape in the direction of the tape travel, and the tape travel is controlled by integral, differential, local proportional and proportional control systems, so as to further improve tape tracking accuracy.

摘要翻译： 在具有沿着与磁带行进方向基本垂直的方向旋转的旋转磁性视频磁头的磁性录像带记录和重放装置（VTR）中，磁带的宽度基本上从常规的两英寸减小到一英寸，而八 用于在磁带上记录视频信号并用于再现来自磁带的视频信号的视频磁头安装在直径基本上等于2英寸的旋转磁头磁鼓的圆周表面上，并被布置成彼此等距离地 旋转磁头鼓的圆周方向。 根据本发明，可以实现紧凑的VTR。 此外，视频信号可以分别通过由信号耦合装置和输入/输出电路组成的两个电路之一交替地传送到旋转磁头鼓，以便实现更紧凑，重量轻和低功率 消费VTR。 此外，为了提高这种窄幅度视频头的情况下的磁带跟踪精度，使用控制信号，其中当从帧转速测量脉冲获得的脉冲序列中的n个周期的脉冲从滚筒转速计脉冲中消除时， 发生信号，以便将脉冲序列与帧参考信号进行复用。 控制信号轨道设置在磁带行进方向的最小拉伸部分或磁带的中心处或周围，并且磁带行程由整体的，差分的，局部的比例和比例控制系统控制，以进一步 提高磁带跟踪精度。

公开(公告)号：US3990106A

公开(公告)日：1976-11-02

申请号：US582447

申请日：1975-05-30

申请人： Yukio Kameyama ,  Hitoshi Masuko ,  Yasuo Matsumoto ,  Masaru Sakata

发明人： Yukio Kameyama ,  Hitoshi Masuko ,  Yasuo Matsumoto ,  Masaru Sakata

IPC分类号： G11B5/60 ,  G11B5/54 ,  G11B21/20 ,  G11B21/22

CPC分类号： G11B5/6005

摘要： A dynamic pressure type floating head system comprising a floating magnetic head, a magnetic recording medium which stores information to be recorded and a resilient member for supporting the magnetic head. The floating head comprises a first flat surface portion of a sliding surface and a second flat surface portion having embedded therein a plurality of projections on the same plane. The attractive force caused by the viscous flow generated between the first surfaces by the relative movement of the surface to be recorded is combined with the holding force caused by the slip flow generated between the second surfaces so that the floating gaps are narrowed. The relative speed between the floating head and the surface to be recorded, the relationships between gaps, and operations of the approaching stroke to a floating position and of the separating stroke from the floating position exhibit a hysteresis characteristic, so that the magnetic recording and reproducing device requires no protective device for protecting contact between the floating head and the magnetic surface to be recorded.

摘要翻译： 一种动态压力型浮动头系统，包括浮动磁头，存储要记录的信息的磁记录介质和用于支撑磁头的弹性构件。 浮动头包括滑动表面的第一平坦表面部分和在同一平面上嵌入有多个突起的第二平坦表面部分。 由待记录表面的相对运动在第一表面之间产生的粘性流引起的吸引力与由第二表面之间产生的滑动流引起的保持力结合，使得浮动间隙变窄。 浮动头与要记录的表面之间的相对速度，间隙之间的关系以及到达浮动位置和分离行程与浮动位置的接近冲程的操作之间的相对速度呈现滞后特性，使得磁记录和再现 装置不需要用于保护浮动头和待记录的磁性表面之间的接触的保护装置。