Patent ID: 8353635

Claim:
A blade drive device comprising: a board that has an engagement pin and an opening; a blade that opens and closes the opening; and a drive source that drives the blade, the drive source comprising: a single rotor rotatably supported; and a stator for applying a rotational force to the rotor, wherein a coil for excitation is wound around the stator, wherein the stator has a fitting hole fitted with a projective portion formed on the board, wherein the stator has a rectangular shape, wherein the stator surrounds the opening of the board, wherein the stator includes a plurality of iron pieces connected to each other, and each of the plurality of iron pieces has a fitting hole into which the projective portion is fitted, each of the plurality of iron pieces has an engagement recess portion with which the engagement pin is engaged, wherein the stator has the rectangular shape when viewed in a direction of a shaft of the rotor, wherein the stator is fixed on the board by thermal caulking the projective portion.