公开(公告)号：US3668487A

公开(公告)日：1972-06-06

申请号：US3668487D

申请日：1970-12-31

Applicant: IBM

Inventor： CUZNER DAVID E ,  RIGBEY LEO J ,  SMITH GEORGE M

IPC: G11B5/55 ,  H01F7/06 ,  H01F7/18 ,  H02K33/18 ,  H02K41/035 ,  H02K33/10

CPC classification number: H02K41/0356 ,  G11B5/5521 ,  H01F7/066 ,  H01F7/1872 ,  H02K33/18

Abstract: Locking and release for rotation of a threaded drive shaft or lead screw are selectively achieved by a detent apparatus, which includes an actuator element that is bidirectionally movable by a voice coil motor (VCM). A toothed detent wheel attached to the rotary drive shaft is engaged by detent pawls for locking. The detent wheel is released to allow rotation of the drive shaft by retraction of the actuator element, that is responsive to the VCM and that pulls the pawls out of engagement with the detent wheel. Stops limit the path of travel of the actuator element. A pulse generating circuit, in combination with a center-tapped coil of the VCM, provides an inhibit pulse to minimize bounce of the movable actuator element and associated mechanical members.

Abstract translation: 通过定位装置有选择地实现螺纹驱动轴或导螺杆的旋转的锁定和释放，该定位装置包括可由音圈马达（VCM）双向移动的致动器元件。 附接到旋转驱动轴的齿形棘爪轮通过用于锁定的止动爪接合。 制动轮被释放以允许致动器元件的缩回来旋转驱动轴，致动器元件响应于VCM并且拉动棘爪脱离与止动轮的接合。 停止限制致动器元件的行进路径。 与VCM的中心抽头线圈组合的脉冲发生电路提供禁止脉冲以最小化可移动致动器元件和相关联的机械构件的弹跳。