Actuator and blade drive device for camera
AssigneeSeiko Precision Inc.
InventorsAkira Yasuda, Shuichi Kawaguchi, Akihiro Ito, Mikishige Sugasa, Shigeru Yanagisawa
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Abstract
An electromagnetic actuator includes; a coil for excitation; a stator excited with different magnetic poles by energization of the coil; a rotor magnetized with different magnetic poles in a circumferential direction thereof, and rotated by a magnetic force generated between the rotor and the stator; and an outputting member rotated in conjunction with the rotor and outputting rotational movement of the rotor to a first blade and a second blade. The rotor and the outputting member are jointed by welding and a welding portion of the rotor lies in a boundary of the magnetic poles thereof.
Claims8
An actuator comprising:
- a coil for excitation;
- a stator excited with different magnetic poles by energization of the coil;
- a rotor magnetized with different magnetic poles in a circumferential direction thereof, and rotated by a magnetic force generated between the rotor and the stator;
- and
- an outputting member rotated in conjunction with the rotor and outputting rotational movement of the rotor to a member,
- wherein the rotor and the outputting member are jointed by welding, and
- a welding portion of the rotor lies in a boundary of the magnetic poles thereof.
A blade drive device for a camera comprising:
- a base plate having an aperture;
- a blade for opening and closing the aperture;
- and
- an actuator for driving the blade,
- wherein the actuator includes:
- a coil for excitation;
- a stator excited with different magnetic poles by energization of the coil;
- a rotor magnetized with different magnetic poles in a circumferential direction, and rotated by a magnetic force generated between the rotor and the stator;
- and
- an outputting member rotated in conjunction with the rotor and outputting rotational movement of the rotor to the blade,
- wherein the rotor and the outputting member are jointed by welding, and
- a welding portion of the rotor lies in a boundary of the magnetic poles thereof.
Dependencies are inferred from the claim text.