Actuator, optical scanner, and image forming device
AssigneeSeiko Epson Corporation
InventorYasushi Mizoguchi
Life of this patent
Estimating the term…
Abstract
An actuator includes: a first oscillatory system including a frame-shaped driving member and a pair of first axial members holding the driving member from both ends so as to allow the driving member to rotate around an X-axis; a second oscillatory system including a movable plate provided inside the driving member and a pair of second axial members holding the movable plate to the driving member from both ends so as to allow the movable plate to rotate around a Y-axis perpendicular to the X axis; and a driving unit including a permanent magnet provided on the driving member, a coil provided so as to face the permanent magnet, a voltage applying unit applying a voltage to the coil, and the permanent magnet has a relief section to avoid making contact with the movable plate.
Claims10
An actuator, comprising:
- a first oscillatory system including a frame-shaped driving member and a pair of first axial members holding the driving member so as to allow the driving member to rotate around a first axis;
- a second oscillatory system including a movable member provided inside the frame of the driving member and a pair of second axial members holding the movable member to the driving member so as to allow the movable member to rotate around a second axis perpendicular to the first axis;
- and
- a driving unit including a permanent magnet of longitudinal shape provided on the driving member, a coil provided so as to face the permanent magnet, and a voltage applying unit applying a voltage to the coil,
- wherein, the permanent magnet is provided such that the longitudinal line of the permanent magnet is slanted with respect to each of the first and the second axis, in a plan view of the movable member,
- the movable member has a circular shape in the plan view, and
- the movable member is rotated around both the first axis and around the second axis.
An optical scanner, comprising:
- a first oscillatory system including a frame-shaped driving member and a pair of first axial members holding the driving member so as to allow the driving member to rotate around a first axis;
- a second oscillatory system including a movable member provided inside the frame of the driving member and a pair of second axial members holding the movable member to the driving member so as to allow the movable member to rotate around a second axis perpendicular to the first axis;
- and
- a driving unit including a permanent magnet of longitudinal shape provided on the driving member, a coil provided so as to face the permanent magnet, and a voltage applying unit applying a voltage to the coil,
- wherein, the permanent magnet is provided such that the longitudinal line of the permanent magnet is slanted with respect to each of the first and the second axis, in a plan view of the movable member,
- the movable member has a circular shape in the plan view, and
- the voltage applying unit applied voltage to the coil, and the movable member is rotated both of around the first axis and around the second axis, and light reflected by the light reflecting section is two-dimensionally scanned.
An image forming device, comprising an optical scanner including:
- a first oscillatory system including a frame-shaped driving member and a pair of first axial members holding the driving member so as to allow the driving member to rotate around a first axis;
- a second oscillatory system including a movable member provided inside the frame of the driving member and a pair of second axial members holding the movable member to the driving member so as to allow the movable member to rotate around a second axis perpendicular to the first axis;
- and
- a driving unit including a permanent magnet of longitudinal shape provided on the driving member, a coil provided so as to face the permanent magnet, and a voltage applying unit applying a voltage to the coil,
- wherein, the permanent magnet is provided such that the longitudinal line of the permanent magnet is slanted with respect to each of the first and the second axis, in a plan view of the movable member,
- the movable member has a circular shape in the plan view, and
- the voltage applying unit applied voltage to the coil, and the movable member is rotated both of around the first axis and around the second axis, and light reflected by the light reflecting section is two-dimensionally scanned.
Dependencies are inferred from the claim text.