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    • 8. 发明授权
    • Bar code scanning assembly with cantilevered or torsionally vibrating
flexural member
    • 具有悬臂或扭转振动件的条码扫描装置
    • US5614706A
    • 1997-03-25
    • US696112
    • 1996-08-13
    • Simon BardAskold StratJoseph KatzBoris Metlitsky
    • Simon BardAskold StratJoseph KatzBoris Metlitsky
    • G06K7/10G06F1/16G06F3/033G06F7/10
    • G06F1/163G06F3/0346G06K7/10564G06K7/10584G06K7/10653G06K7/10881G06K7/10891G06K7/1098G06F2203/0331G06K2007/10534G06K2207/1016
    • An optical scanner module, for use in a bar code reader, has an electromagnetic coil across which is disposed a thin flexible strip. Mounted to the center of the strip is an optical element, such as a lightweight mirror, and a magnetic element, such as a permanent magnet. When an AC signal is applied to the electromagnetic coil, a varying magnetic field is produced which interacts with the fixed magnetic field of the magnet causing the magnet and mirror assembly to flex the flexible strip (e.g., in a twisting motion), thereby changing the spatial orientation of the mirror. By suitably driving the electromagnetic coil, the mirror can be made to oscillate, thereby converting a laser beam directed onto the mirror into a scanning laser beam. The entire module is compact, inexpensive to manufacture, and robust. Additional robustness may be provided by incorporating shock-absorber material between the flexible strip and the electromagnetic coil, and protecting the mirror by covering the front surface of the scanner module with a transparent shield.
    • 用于条形码读取器的光学扫描器模块具有电磁线圈,在该电磁线圈上设置有薄的柔性条带。 安装到条的中心的是光学元件,例如轻量级反射镜,以及诸如永久磁铁的磁性元件。 当AC信号被施加到电磁线圈时,产生与磁体的固定磁场相互作用的变化的磁场,导致磁体和反射镜组件挠曲柔性带(例如,以扭转运动),从而改变 镜子的空间取向。 通过适当地驱动电磁线圈,可以使反射镜振荡,从而将指向反射镜的激光束转换为扫描激光束。 整个模块紧凑,制造成本低,而且坚固耐用。 可以通过在柔性带和电磁线圈之间并入减震材料来提供额外的鲁棒性,并且通过用透明屏蔽覆盖扫描器模块的前表面来保护镜子。