公开(公告)号：US4479208A

公开(公告)日：1984-10-23

申请号：US302724

申请日：1981-09-16

申请人： Hideaki Miyatake

发明人： Hideaki Miyatake

IPC分类号： G11B21/02 ,  G11B21/20 ,  G11B9/06 ,  G11B17/00

CPC分类号： G11B21/20 ,  G11B21/02

摘要： A signal pickup device for capacitance disk records comprises within a housing a stylus control unit responsive to a control signal to counteract the jitter movement of a capacitance detection stylus and to keep it on the right track while the record is spinning at high speeds. The stylus control unit is positioned so that its stylus moving element is movable in longitudinal and transverse directions parallel to the surface of the record. The stylus control unit includes a pivot member to which the stylus cantilever is magnetically secured by a permanent magnet to provide a pivotal movement in response to the control signal, whereby the stylus is rendered movable exclusively in horizontal directions. The device housing is formed with an opening at the bottom thereof to permit the stylus control unit to be secured therein in order to locate it in a lower position with respect to the record surface. This causes the cantilever to be tilted at a small angle to the record surface and reduces undesirable downward pressure which might occur as a result of the surface variations of the spinning record.

摘要翻译： 用于电容盘记录的信号拾取装置包括在壳体内的触控器控制单元，其响应于控制信号来抵消电容检测触控笔的抖动移动，并且当记录以高速旋转时将其保持在正确的轨道上。 触针控制单元被定位成使得其触针移动元件能够在平行于记录表面的纵向和横向上移动。 触针控制单元包括枢轴构件，触针悬臂通过永久磁铁磁性地固定到该枢轴构件上，以响应于控制信号提供枢转运动，从而使触针仅在水平方向上可移动。 设备壳体在其底部形成有开口，以允许触针控制单元固定在其中，以将其定位在相对于记录表面的较低位置。 这导致悬臂与记录表面以小角度倾斜，并且减少了由于旋转记录的表面变化而可能发生的不期望的向下压力。

公开(公告)号：US4160268A

公开(公告)日：1979-07-03

申请号：US891492

申请日：1978-03-29

申请人： Kunio Goto ,  Osamu Tajima ,  Hideaki Miyatake

发明人： Kunio Goto ,  Osamu Tajima ,  Hideaki Miyatake

IPC分类号： G11B3/38 ,  G11B9/06 ,  H01R4/48 ,  H02K41/035 ,  H04R9/12 ,  G11B21/10

CPC分类号： H04R9/12 ,  G11B3/38 ,  G11B9/06 ,  H01R4/48 ,  H02K41/0354 ,  H02K41/0356 ,  H02K2201/18

摘要： A signal pickup device comprises a reproducing stylus for tracing a track on a rotary recording medium thereby to reproduce the information signal recorded thereon, a cantilever provided at a free distal end thereof with the reproducing stylus, means for supporting the cantilever so as to be rotatable about substantially proximal root end thereof and movable in an longitudinal direction thereof, coil means including at least two movable coils fixed to the support means, means for generating a control signal current in response to deviation of the tracing position of the reproducing stylus from a track to be traced, and supplying the control signal to the coils, and magnetic field forming means secured at a predetermined position of a main body of the device and adapted to apply to the coils a magnetic field in a direction parallel with the rotary recording medium. The coils undergo a motion due to a mutual interaction between the magnetic field and the current flowing therethrough, whereby the reproducing stylus is displaced by way of the cantilever at least in the width of the track and is thereby tracking controlled.