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    • 58. 发明授权
    • Method of manufacturing rotation sensor and structure of rotation sensor
    • 制造旋转传感器的方法和旋转传感器的结构
    • US5633062A
    • 1997-05-27
    • US287196
    • 1994-08-08
    • Hidetoshi SaitoMasahiro Kume
    • Hidetoshi SaitoMasahiro Kume
    • B29C45/14G01P1/02G01P3/42
    • G01P1/026B29C45/14639Y10T428/23Y10T428/238Y10T428/239Y10T428/2495
    • A method of manufacturing a rotation sensor can effectively prevent a sensor element from moving during a resin molding process for forming a resin portion that covers the sensor element to provide excellent waterproofness and airtightness. During a first resin injection step, an end of a bobbin of the sensor element is fixed or held in place by a slide core. Thereafter the slide core is extracted and resin is again injected in a second injection step into a vacated portion that is formed by extraction of the slide core. In the finished rotation sensor, the resin completely surrounds and encloses the bobbin, except at an exposed end of a magnetic pole piece. A metal mounting bracket is embedded in the resin at a spacing away from the bobbin. The bobbin has a positioning cavity to receive the slide core during the molding. The resin covering an upper part of the bobbin is at least four times as thick as the resin covering the coil of the sensor element.
    • 制造旋转传感器的方法可以有效地防止传感器元件在用于形成覆盖传感器元件的树脂部分的树脂模制过程中移动以提供优异的防水性和气密性。 在第一树脂注入步骤期间,传感器元件的线轴的端部通过滑动芯固定或保持就位。 此后,提取滑动芯,并且在第二注射步骤中将树脂再次注入通过提取滑动芯而形成的空出部分。 在完成的旋转传感器中,除了磁极片的暴露端之外,树脂完全包围和包围线轴。 金属安装支架以与线轴相距的间隔嵌入树脂中。 筒管具有定位腔,用于在成型过程中接收滑动芯。 覆盖线轴上部的树脂至少是覆盖传感器元件线圈的树脂的四倍。