31-03-2022 дата публикации
Номер: US20220103057A1
A gimmick device according to one or more embodiments may include a gimmick and a voice coil motors (VCM). The VCM includes a casing, a permanent magnet, a yoke and iron-core, a bobbin, and a coil part. The gimmick is mounted to the casing on a movable side. The coil part includes a drive and primary coil serving as a drive coil and a primary coil of a displacement sensor including a differential transformer, the drive and primary coil being interlinked with a magnetic flux by the permanent magnet, and two secondary coils of the displacement sensor. The yoke and iron-core may be disposed in a central space defined in the coil part, and serves as an iron core of the displacement sensor. 1. A gimmick device comprising:a gimmick; anda voice coil motor configured to operate the gimmick, wherein{'claim-text': ['a casing having a bottom end-closed cylindrical shape;', 'a permanent magnet having a cylindrical outer peripheral face, the permanent magnet being disposed on a central bottom portion in the casing;', 'a yoke disposed opposite the permanent magnet in the casing, the yoke being equal in diameter to the permanent magnet;', 'a bobbin; and', 'a coil part wound around the bobbin,'], '#text': 'the voice coil motor comprises:'}the gimmick is mounted to a movable one of the casing or the bobbin,{'claim-text': ['a drive and primary coil serving as a drive coil and a primary coil of a differential transformer, the drive and primary coil being interlinked with a magnetic flux by the permanent magnet; and', 'two secondary coils of the differential transformer, and'], '#text': 'the coil part comprises:'}the yoke is disposed in a central space defined in the coil part, and serves as an iron core of the differential transformer.2. The gimmick device according to claim 1 , whereinthe two secondary coils are wound around an outer periphery of the drive and primary coil while being placed on top of the other.3. The gimmick device according to claim 1 , whereinthe two secondary ...
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