摘要:
A lens drive unit includes a movable member with lenses; and a guide portion configured to movably guide the movable member back and forth along a predetermined direction and rotatably guide the movable member about a predetermined rotational axis in a plane perpendicular to an optical axis of the lens. A distance r between the gravity center of the movable member and the rotational axis satisfies the following expression (A): r≦√{square root over (0.2J/M)} (A).
摘要:
An image stabilizing device of the present invention includes: a correction lens holding member 405 to which a correction lens G3 included in an optical system of a camera is fixed; a lens holding member 408 that holds the correction lens holding member so that the correction lens holding member is movable in a rectilinear direction that is an arbitrary direction in a plane orthogonal to an optical axis A of light entering the correction lens G3 and in a rotation direction along an arc in the plane about a rotary shaft A3 substantially parallel to the optical axis A; a driving portion for rectilinear movement 412 that applies a driving force to the correction lens holding member 405 in order to drive the correction lens holding member 405 in the rectilinear direction; and a driving portion for rotation 413 that applies a driving force to the correction lens holding member 405 in order to drive the correction lens holding member 405 in the rotation direction. According to this configuration, it is possible to provide an image stabilizing device that achieves miniaturization, while preventing a deterioration in image stabilizing performance, and a camera including the same.
摘要:
An image stabilizing device of the present invention includes: a correction lens holding member 405 to which a correction lens G3 included in an optical system of a camera is fixed; a holding member 408 that holds the correction lens holding member so that the correction lens holding member is movable in a rectilinear direction that is an arbitrary direction in a plane orthogonal to an optical axis A of light entering the correction lens G3 and in a rotation direction along an arc in the plane about a rotary shaft A3 substantially parallel to the optical axis A; a driving portion for rectilinear movement 412 that applies a driving force to the correction lens holding member 405 in order to drive the correction lens holding member 405 in the rectilinear direction; and a driving portion for rotation 413 that applies a driving force to the correction lens holding member 405 in order to drive the correction lens holding member 405 in the rotation direction. According to this configuration, it is possible to provide an image stabilizing device that achieves miniaturization, while preventing a deterioration in image stabilizing performance, and a camera including the same.
摘要:
The actuator disclosed herein comprises a coil, a magnet and a magnetism detection element. The magnet is configured to move a predetermined distance relative to the coil via a magnetic force generated when current is passed through the coil. The magnet includes a first polarization line perpendicular to the direction in which the magnet moves relative to the coil, and a second polarization line parallel to the first polarization line. The magnetism detection element is configured to detect the position of the magnet. The coil faces the first polarization line and the magnetism detection element faces the second polarization line. The length from the second polarization line to a first end of the magnet is equal to or more than 1.25 times the predetermined distance. The first end of the magnet is closer to the magnetism detection element than to the coil.
摘要:
An assembly device assembles a recording and reproducing device for an optical disc by bonding spindle motor to a mechanical chassis. The assembly device adjusts the attitude of the spindle motor relative to the mechanical chassis prior to bonding by adjusting an inclination of the spindle motor about a first axis and about a second axis perpendicular to the first axis. The assembly device also adjusts a height of the spindle motor.
摘要:
There is provided a disk apparatus having a clamp structure, which can fix a disk in a stable manner with a simple construction. More specifically, the disk apparatus includes a hub having a disk inserting portion having a cylindrical plane in the outer part of one end and a disk receiving portion having a flat part and being pivotably supported, a head having an inner hole through which the disk inserting portion is fitted, facing toward one face of a disk, levitating and scanning above the disk and reading a signal recorded on the disk or recording a signal on the disk, the disk being held by the disk receiving portion, and a clamp unit holding the disk with the disk receiving portion. In this case, the disk receiving portion has an inclined or declined plane. Thus, the amount and direction of deformation of the disk, which is caused by clamping, are defined, and obtaining a stable amount of head levitation independently of temperature changes can prevent the occurrence of a distortion of the disk. Therefore, a decrease in head output, for example, can be prevented, and the reliability can be improved.
摘要:
A spindle motor and a disk drive device are provided that have a high operation efficiency of the motor, that does not leak oil, and that has an improved stability by decreasing a runout component in the direction of the rotation axis. The spindle motor includes a rotor hub (20) composed of a disk-like flange (201) and a cylinder-shaped shaft (203); a ring-shaped rotating magnet (16) fastened on one main surface of the flange (201); an armature (14) facing the rotating magnet (16); a sleeve (80) rotatably supporting the shaft (203); and a chassis (15) fixing the armature (14) and the sleeve (80). The flange (201) and the shaft (203) are integrally formed with magnetic material; a protrusion is not provided between a mounting surface (204) for mounting the rotating magnet (16) thereon and a counter-face surface (205) facing the end surface of the sleeve; and the mounting surface (204) and the counter-face surface (205) are orthogonal to the direction of the central axis (A-A′) of the shaft (203), and in a level plane; or the mounting surface (204) is recessed stepwise from the counter-face surface (205) toward the disk mounting portion (202).
摘要:
A thrust dynamic pressure bearing with high inclination-resistant rigidity against axis runout and additionally low bearing loss torque is implemented. Herringbone grooves (131) having intermediate bends (132) are provided on rotating-side bearing surface (11) provided on the rotating-side bearing member. When rotating-side bearing surface (11) rotates in direction A (clockwise), lubricating oil generates dynamic pressure in an area centering on intermediate bend (132) along radially outer part (133) and radially inner part (134) of herringbone groove (131). As a result that groove width (G) of a dynamic pressure generating groove and width (L) of a land adjacent to the dynamic pressure generating groove holds G>L at an arbitrary radius (2) position, a thrust dynamic pressure bearing with high inclination-resistant rigidity and additionally low bearing loss torque is provided.
摘要:
The disclosed is a spindle motor most suitable for magnetic disk drives, optical disk drives or the like capable of constraining undesirable cogging torques to a low level and of winding a coil regularly. In particular, the inward periphery of magnetic pole of iron core for a stator includes of an arc shaped surface concentrically to the outward periphery of rotor magnet and a pair of flat surfaces, generally perpendicular to the centerline of magnetic pole, attached to both sides of the arc shaped surface peripherally. The configuration can reduce the cogging torques without any decrease in motor efficiency.
摘要:
A reflecting mirror and an optical bench are placed on an external jig provided with a mirror holding portion for maintaining the reflecting mirror, and then the reflecting mirror and the optical bench are bonded and fixed, thus obtaining an optical head. An adhesion reference plane for the reflecting mirror is no longer required in the optical bench, thus reducing the size and cost of the optical bench. The mounting precision is high and stable. Further, the reflecting mirror is bonded and fixed at the vicinities of the approximate centers of its two opposed side faces and therefore the variation in orientation of the reflecting mirror due to expansion or contraction of an adhesive is lessened, thus achieving a highly-reliable optical head excellent in environmental stability characteristics.