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    • 6. 发明授权
    • Drive apparatus for tape recorder
    • 磁带录音机驱动装置
    • US4196874A
    • 1980-04-08
    • US944250
    • 1978-09-21
    • Kenji Ohara
    • Kenji Ohara
    • G11B15/44G03B1/04
    • G11B15/444
    • In a drive apparatus for a tape recorder which has a pair of spaced apart selectively driven wheels, for example, of supply and take-up reel bases, respectively, a drive wheel located between the driven wheels and adapted to be selectively rotated in forward and reverse directions by means of an electric motor for effecting rotation of an idler wheel which continuously engages the drive wheel, and a pivotally mounted support arm rotatably carrying the idler wheel and being swingable between a first position where the idler wheel bears against one of the driven wheels for driving the latter from the drive wheel and a second position where the idler wheel bears against the other of the driven wheels for driving such other driven wheel from the drive wheel; a magnetic non-contacting coupling is provided between the idler wheel and the support arm so as to yieldably resist relative rotation thereof and thereby cause reliable swinging of the support arm to its first and second positions in response to rotation of the drive wheel in its forward and reverse directions, respectively.
    • 在用于磁带录音机的驱动装置中,驱动装置分别具有一对间隔开的选择性驱动的轮,例如供应和卷取盘座,驱动轮位于从动轮之间并适于选择性地向前旋转, 通过用于实现与驱动轮连续接合的惰轮的旋转的电动马达反向;以及可枢转地安装的支撑臂,其可旋转地承载惰轮,并且可在第一位置和第一位置之间摆动,第一位置与惰轮相对于驱动 用于从所述驱动轮驱动所述驱动轮的轮,以及所述惰轮与所述从动轮相对的第二位置,用于从所述驱动轮驱动所述另一个从动轮; 在惰轮和支撑臂之间提供磁性非接触式联轴器,以便可靠地抵抗其相对旋转,从而响应于驱动轮在其向前的转动而使支撑臂可靠地摆动到其第一和第二位置 和相反方向。