US 11,742,739 B2
Gimmick device
Ryuji Kawamoto, Ichinomiya (JP)
Assigned to OMRON CORPORATION, Kyoto (JP)
Filed by OMRON Corporation, Kyoto (JP)
Filed on Aug. 23, 2021, as Appl. No. 17/408,543.
Claims priority of application No. 2020-163606 (JP), filed on Sep. 29, 2020.
Prior Publication US 2022/0103057 A1, Mar. 31, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. H02K 41/035 (2006.01); H02K 7/14 (2006.01); H02K 11/33 (2016.01); H02K 11/26 (2016.01); A63F 7/02 (2006.01)
CPC H02K 41/0354 (2013.01) [A63F 7/022 (2013.01); H02K 7/14 (2013.01); H02K 11/26 (2016.01); H02K 11/33 (2016.01)] 15 Claims
OG exemplary drawing
 
1. A gimmick device comprising:
a gimmick; and
a voice coil motor configured to operate the gimmick, wherein
the voice coil motor comprises:
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,
the gimmick is mounted to a movable one of the casing or the bobbin, the coil part comprises:
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
the yoke is disposed in a central space defined in the coil part, and serves as an iron core of the differential transformer.