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    • 7. 发明授权
    • Stepping motor with magnetic sensor
    • 带磁传感器的步进电机
    • US06424061B1
    • 2002-07-23
    • US09661925
    • 2000-09-14
    • Yoshiaki FukudaYutaka KamogiYukio Nakamura
    • Yoshiaki FukudaYutaka KamogiYukio Nakamura
    • H02K3714
    • H02K29/08H02K11/33H02K37/14Y10S310/06
    • A stepping motor includes (a) a rotor being driven by exciting a driving coil, (b) a position detector including a magnetic flux generator for outputting a signal in the same phase as a polarity position of a magnet mounted to the rotor and a magnetic sensor receiving magnetic force from the magnetic flux generator, (c) a controller for controlling the stepping motor responsive to a position detection signal supplied from the position detector, (d) a board on which the magnetic sensor and the controller are mounted, and (e) a sensor cover for positioning the magnetic sensor, dissipating heat of the controller and for covering at least a part of the position detector and the controller. This structure allows the controller and the magnetic sensor to avoid the heat generated by the stepping motor. This structure also allows to assemble a motor sub-assembly including the driving coil, the rotor and the magnetic flux generator independently of and separately from a sensor sub-assembly including the board and the sensor cover. Thus the productivity increases and material loss decreases.
    • 步进电动机包括:(a)通过激励驱动线圈驱动的转子,(b)位置检测器,其包括用于输出与安装到转子的磁体的极性位置相同相位的信号的磁通发生器, 传感器从磁通发生器接收磁力,(c)控制器,用于响应于从位置检测器提供的位置检测信号来控制步进电机,(d)安装有磁性传感器和控制器的板,以及( e)用于定位磁传感器的传感器盖,消散控制器的热量并覆盖位置检测器和控制器的至少一部分。 该结构允许控制器和磁传感器避免步进电机产生的热量。 该结构还允许独立于包括板和传感器盖的传感器子组件并且独立地组装包括驱动线圈,转子和磁通量发生器的电动机子组件。 因此生产率提高,材料损失减少。
    • 9. 发明授权
    • Drive coil protection apparatus and method and printer incorporating the
apparatus
    • 驱动线圈保护装置和装置的方法和打印机
    • US5452958A
    • 1995-09-26
    • US27213
    • 1993-03-05
    • Kazuhisa ArugaYoshiaki FukudaYoshikazu Ito
    • Kazuhisa ArugaYoshiaki FukudaYoshikazu Ito
    • B41J2/30B41J9/50
    • B41J2/30
    • The invention provides an drive coil protection apparatus and method and a printer incorporating the apparatus. A rank memory stores a preset rank value associated with a reference drive coil in the print head of a printer. The preset rank value characterizes inherent deviations associated with the reference drive coil. The deviations result from manufacturing process, etc. A judgment value memory stores a plurality of sets of mode judgment values. Each set of mode judgment values corresponds to a particular rank value. Each mode judgment value represents a threshold value for determining the thermal condition of the print head and for selecting an appropriate operating mode for the print head. A head information detector detects the voltage drop across the reference drive coil to measure the change in the resistance of the reference drive coil. The voltage drop is digitized for accuracy measurement. The change in temperature of the reference drive coil can thus be determined. An operating mode selection circuit compares the digitized voltage drop with a particular set of mode judgment values in the judgment value memory corresponding to the preset rank value. Then, the operating mode selection circuit selects a suitable operating mode for the print head in accordance with the comparison. Thus, burnout of the print head can be prevented without reducing the operating efficiency of the printer.
    • 本发明提供一种驱动线圈保护装置和方法以及包含该装置的打印机。 等级存储器将与参考驱动线圈相关联的预设等级值存储在打印机的打印头中。 预设等级值表征与参考驱动线圈相关联的固有偏差。 由制造过程等导致的偏差。判定值存储器存储多组模式判定值。 每组模式判断值对应于特定的等级值。 每个模式判断值表示用于确定打印头的热状态并选择用于打印头的适当操作模式的阈值。 头信息检测器检测参考驱动线圈两端的电压降,以测量参考驱动线圈的电阻变化。 电压降被数字化以进行精度测量。 因此可以确定参考驱动线圈的温度变化。 操作模式选择电路将数字化电压降与对应于预设等级值的判断值存储器中的特定模式判定值组进行比较。 然后,操作模式选择电路根据比较选择适合于打印头的操作模式。 因此,可以在不降低打印机的操作效率的情况下防止打印头的烧坏。