Blade drive device
View Patent ↗A blade drive device includes: a blade; a drive source that drives the blade; and a chassis that has an opening opened and closed by a driving of the blade, and that houses the blade and the drive source. The drive source includes: a rotor that is rotatably supported; and a stator around which a coil for excitation is wound and which applies a rotational force to the rotor. The stator is formed along an inner side surface of the chassis and has a rectangular shape.
1. A blade drive device comprising:
a blade;
a drive source that drives the blade; and
a chassis that has an opening opened and closed by the blade, and that houses the blade and the drive source,
the drive source comprising:
a rotor that is rotatably supported;
a stator, having a flat shape in an optical axis direction, around which a coil for excitation is wound and which applies a rotational force to the rotor, the stator, surrounding an axis of the opening, being formed along an inner side surface of the chassis and having a rectangular shape, wherein a thickness of the chassis corresponds to a thickness of the coil wound around the stator, the stator comprising a plurality of iron pieces of an identical shape mutually connected, and each of the plurality of iron pieces has a thin portion thinner than another portion at a connecting portion where the plurality of iron pieces are connected to each other, with the than portions in contact with each other, and
a print substrate having a terminal portion for energizing the coil,
wherein a connecting portion of one end of the coil and the terminal portion are housed within the chassis and are surrounded by the stator.
2. The blade drive device of claim 1 , wherein the print substrate is inserted into the chassis via a side surface of the chassis.
3. The blade drive device of claim 1 , wherein the blade is attached to the rotor.
4. The blade drive device of claim 1 , wherein the chassis includes an upper case and a lower case that are separately provided in an optical path direction, the upper case and the lower case are provided with a filling portion filled with an adhesive material for fixing the upper case and the lower ease to each other.
5. The blade drive device of claim 1 , wherein the chassis includes an upper case and a lower case, the upper case and the lower case are provided with a snap fit engagement portion for fixing the upper case and the lower case to each other.
6. The blade drive device of claim 1 , wherein the chassis and the stator each have a rectangular shape when viewed in the optical axis direction.
7. The blade drive device of claim 1 , wherein a controller IC is mounted on the print substrate, and the controller IC is housed in the chassis and is surrounded by the stator.
8. A blade drive device comprising:
a blade;
a drive source that drives the blade; and
a chassis that has an opening opened and closed by the blade, and that houses the blade and the drive source,
the drive source comprising:
a rotor that is rotatably supported;
a stator, having a flat shape in an optical axis direction, around which a coil for excitation is wound and which applies a rotational force to the rotor, the stator, surrounding an axis of the opening, being formed along an inner side surface of the chassis and having a rectangular shape, wherein a thickness of the chassis corresponds to a thickness of the coil wound around the stator, the stator comprising a plurality of iron pieces of an identical shape mutually connected, and each of the plurality of iron pieces has a thin portion thinner than another portion at a connecting portion where the plurality of iron pieces are connected to each other, with the thin portions in contact with each other, and
a print substrate having a terminal portion for energizing the coil,
wherein a connecting portion of one end of the coil and the terminal portion are housed within the chassis and are surrounded by the stator, wherein
the iron pieces includes: a first iron piece having a substantially U shape; and
second and third iron pieces respectively connected to an end and another end of the first iron piece and facing the rotor;
each of the first, second, and third iron pieces has a thin portion thinner than another portion;
the thin portion of the first iron piece includes a first thin portion and a second thin portion;
the first thin portion of the first iron piece is in contact with the thin portion of the second iron piece; and
the second thin portion of the first iron piece is in contact with the thin portion of the third iron piece.