Abstract: A camera module includes a housing accommodating a lens module, a driving unit including a magnet disposed on the lens module and a coil disposed to face the magnet, a yoke generating attractive force with the magnet, a first ball member accommodated in a first receiving space disposed between the lens module and the housing, and pressed by the attractive force, and a second ball member accommodated in a second receiving space disposed between the lens module and the housing, and pressed by the attractive force. A length of the first receiving space in an optical axis direction is different from a length of the second receiving space in the optical axis direction.

Abstract: A camera module includes a lens module including lenses and a reflecting module disposed in front of the lens module. The reflecting module is configured to change a path of light to direct the light toward the lens module. The reflecting module includes a holder in which a reflecting member configured to change the path of the light is mounted and a first housing supporting the holder. The holder is configured to slide with respect to the first housing to enable rotation of the reflecting member with respect to a first axis and a second axis.

Abstract: A camera module includes a first position sensor configured to detect a position of a lens barrel in a first direction and including a 1-1-th sensing coil and a 1-2-th sensing coil having respective inductances that change as the lens barrel moves in the first direction; and a second position sensor including a second sensing coil having an inductance that changes as the lens barrel moves in a second direction, and a third sensing coil having an inductance that changes as the lens barrel moves in a third direction, wherein the second position sensor is configured to detect a position of the lens barrel in the second direction and a position of the lens barrel in the third direction by adding or subtracting a reference inductance to or from the inductance of the second sensing coil and the inductance of the third sensing coil.

Abstract: An optical image stabilizing (OIS) module and a camera module are provided. The OIS module includes a driving holder provided on a bottom surface of a housing, a driving frame comprising a reflection member and supported on an inner wall of the driving holder, a driving part configured to provide a driving force to move the driving holder and the driving frame, wherein the driving holder is configured to move in one or more of a linear direction and a rotational direction on the bottom surface of the housing to move the reflection member in a first axial direction, perpendicular to an optical axis, and the driving frame is configured to move in one or more of the linear direction and the rotational direction on the inner wall of the driving holder to move the reflection member in a second axial direction, perpendicular to the optical axis.

Abstract: A sensing unit of a camera module includes a detection target provided on a side surface of a lens module, one or more sensing coils disposed to face the detection target, and a calculator. The calculator may determine a displacement of the detection target translated in any of an optical axis direction, a first direction perpendicular to the optical axis direction, and a second direction perpendicular to the optical axis direction, based on inductances of the one or more sensing coils.

Abstract: A reflecting module for optical image stabilization (OIS) includes a housing; a rotation holder provided in the housing and comprising a reflecting member; a rotation plate provided in the housing between an inner wall of the housing and the rotation holder so that the rotation holder is supported by the inner wall of the housing via the rotation plate; and a driving part configured to apply a driving force to the rotation holder to move the rotation holder.

Abstract: A camera module includes a lens module including lenses and a reflecting module disposed in front of the lens module. The reflecting module is configured to change a path of light to direct the light toward the lens module. The reflecting module includes a holder in which a reflecting member configured to change the path of the light is mounted and a first housing supporting the holder. The holder is configured to slide with respect to the first housing to enable rotation of the reflecting member with respect to a first axis and a second axis.

Abstract: An actuator includes a magnet, a driving coil facing the magnet, a driver, and a position calculation processor. The driver is configured to move the magnet in at least one of an optical axis direction and a direction perpendicular to the optical axis by applying a driving signal to the driving coil. The position calculation processor includes sensing coils, and is configured to calculate a position of the magnet according to inductance levels of an inductor of the sensing coils. The inductance levels vary according to movements of the magnet.

Abstract: A spindle motor may include: a sleeve rotatably supporting a shaft; a rotor coupled to the shaft and rotating together therewith; and a base member fixedly coupled to the sleeve, wherein the base member includes a plurality of penetration holes formed therein so as to penetrate therethrough, and a magnetic material is inserted into at least one of the plurality of penetration holes, and non-magnetic materials are inserted into the remaining penetration holes.

Abstract: Disclosed herein is a hard disk drive. The hard disk drive according to a preferred embodiment of the present invention includes: at least one disk; a spindle motor rotating the disk; a head stack assembly rotatable to write and read data on and from the disk; a plate-shaped base rotatably supporting the head stack assembly and supporting the spindle motor; and at least one elongated pin disposed on the base. In particular, the base according to the preferred embodiment of the present invention is integrally provided with at least one cylindrical burring part that may receive a part of the pin.

Abstract: There is provided a base assembly including a motor mounting part, and a base body including a disk mounting part coupled to the motor mounting part and having a disk disposed thereon, the disk having data stored therein, and a head seating part formed in a position lower than that of the disk mounting part, wherein the motor mounting part is formed of a non-magnetic material, and the base body is formed of a magnetic material.

Abstract: There is provided a spindle motor including: a base member; a holding member having a lower end portion fixedly connected to the base member and a stator core installed on an outer peripheral surface thereof; a sleeve fixedly installed on an inner peripheral surface of the holding member; a shaft rotatably supported by the sleeve; and a rotor hub installed on an upper end portion of the shaft to rotate together therewith.

Abstract: Disclosed herein are an electromagnetic module for a spindle motor including a shaft and a spindle motor having the same. The electromagnetic module includes: an armature including a core and a coil wound around the core; and a magnet facing the armature, wherein the magnet is provided with a protrusion part disposed over the core. The spindle motor includes: a rotor part including a shaft, a hub, and a magnet; a stator part including a sleeve rotatably supporting the shaft, a base having the sleeve coupled thereto, and an armature facing the magnet, fixedly coupled to the base, and including a core and a coil; and a fluid dynamic bearing part formed between the rotor part and the stator part by being filled with oil, wherein the magnet is provided with a protrusion part disposed over the core.

Abstract: Disclosed herein is a spindle motor including: a rotor including a shaft, a hub, and a magnet; a stator including a sleeve rotatably supporting the shaft, a base having the sleeve coupled thereto, and an armature facing the magnet, fixedly coupled to the base, and including a core and a coil; and a fluid dynamic bearing part formed between the rotor and the stator by being filled with oil, wherein the stator further includes a pulling plate disposed to face the magnet in an axial direction of a shaft, coupled to the base, and protruded upwardly toward the core in a axial direction of a shaft.