Optical scanner and image forming apparatus
First Claim
1. An optical scanner comprising:
- 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 a side opposite from the movable section;
a driving section for 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 the movable beam extends; and
a supporting frame for 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, andthe driving section includes a coil disposed so as to generate a magnetic field in a direction perpendicular to a polarity of the permanent magnet.
1 Assignment
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Accused Products
Abstract
An optical scanner includes: a light reflecting section having a light reflecting surface; a supporting section supporting the light reflecting section; a movable section supporting the supporting section; 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; a displacement section connected to the movable beam; two drive beams each extending from the displacement section; 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, and an end on the side of the movable section of the supporting section is fixed in a position more distant from the light reflecting section than an end face on the side of the light reflecting section of the movable section.
9 Citations
7 Claims
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1. An optical scanner comprising:
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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 a side opposite from the movable section; a driving section for 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 the movable beam extends; and a supporting frame for 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. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An image forming apparatus comprising:
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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.
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Specification