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    • 7. 发明授权
    • Rewind control unit for a tape reader
    • 回卷磁带阅读器的控制单元
    • US4724308A
    • 1988-02-09
    • US756986
    • 1985-07-02
    • Seiichi HattoriYutaka MizunoKunio Kanda
    • Seiichi HattoriYutaka MizunoKunio Kanda
    • G06K13/26G11B15/02G11B15/18G11B15/20G11B15/22G11B15/44G11B15/48G06K7/10
    • G11B15/18G11B15/22G11B15/442G11B15/48
    • A low power consumption type tape reader permits miniaturization of reel motors and ensures stopping a tape (3) at a first rewind stop code, even if the response of a brake magnet (11) is somewhat poor. When a rewind command is received, the rotational speed of a capstan motor (12) is switched from a forward low speed to a reverse low speed, and then a feed magnet (14) is actuated to rewind the tape (3). The rotational speed of the capstan motor (12) is gradually increased to a reverse high speed. When a rewind stop code is detected, the speed of the capstan motor (12) is gradually decreased to the reverse low speed, and then the brake magnet (11) is actuated to stop the feed of the tape (3) temporarily. A reversible counter (40) stores the number of rewind stop codes detected during the time interval between the detection of the first rewind stop code and the temporary stopping of the feed of the tape (3). After the tape (3) has stopped, the speed of the capstan motor (12) is switched to the forward low speed. When the forward low speed is reached, the feed magnet (14) is actuated to feed the tape (3) in the forward direction, and the number of detected rewind stop codes is subtracted from the contents of the reversible counter (40). When the contents of the reversible counter becomes zero, the brake magnet (11) is actuated to stop the feed of the tape (3).
    • PCT No.PCT / JP84 / 00529 Sec。 371日期:1985年7月2日 102(e)日期1985年7月2日PCT提交1984年11月2日PCT公布。 第WO85 / 02045号公报 日期为1985年5月9日。低功耗型磁带读取器允许卷轴电机的小型化,并且即使制动磁体(11)的响应稍差,也能够以第一快退停止码停止磁带(3)。 当接收到倒带命令时,主导轮马达(12)的转速从正向低速切换到反向低速,然后致动进给磁铁(14)以重绕带子(3)。 主导轴马达(12)的转速逐渐增加到相反的高速。 当检测到倒带停止码时,主动马达(12)的速度逐渐降低到反向低速,然后制动磁铁(11)被暂时停止输送带(3)。 可逆计数器(40)存储在第一倒带停止码的检测和带(3)的馈送的暂停之间的时间间隔期间检测到的倒带停止码的数量。 在磁带(3)停止之后,主导轴马达(12)的速度被切换到正向低速。 当到达正向低速时,进给磁铁(14)被致动以沿着正向馈送带(3),并且从可逆计数器(40)的内容中减去检测到的倒退停止代码的数量。 当可逆计数器的内容物为零时,制动磁铁(11)被致动以停止输送带(3)。