Optical scanner and image forming apparatus

An image forming apparatus comprising:

• a light source;
• and
• an optical scanner scanning a light from the light source,
• wherein the optical scanner includes:
• a light reflecting section having a light reflecting surface,
• a supporting section supporting the light reflecting section,
• a movable section that supports the supporting section and can turn about a rotation center axis,
• at least a pair of movable beams extending from the movable section and disposed in such a way that the movable beams face each other with the movable section interposed therebetween,
• a displacement section connected to one of the movable beams on the side opposite from the movable section,
• a driving section driving the displacement section,
• two drive beams each extending from the displacement section in a direction along the light reflecting surface and perpendicular to a direction in which one of the movable beams extends, and
• a supporting frame supporting the drive beams,
• wherein the movable beams each include a bending section which is bent and deformed in a thickness direction of the supporting frame by displacement of the displacement section,
• an end of the supporting section located proximate the movable section is fixed at a position more distant from the light reflecting section than an end face of the movable section that faces the light reflecting section,
• the supporting section is fixed to a bottom face portion of a concave section of the movable section by being bonded thereto,
• the displacement section includes a permanent magnet having, along a direction perpendicular to the light reflecting surface, a north pole disposed on a side where one surface of the displacement section is located and a south pole disposed on a side where another surface of the displacement section is located,
• the displacement section has a through-hole, and the permanent magnet is inserted into the through-hole, and
• the driving section includes a coil disposed so as to generate a magnetic field in a direction perpendicular to a polarity of the permanent magnet.