Disclosed is a voice coil motor, the motor including a mover having a bobbin equipped with a lens and a coil block secured to an outer circumference of the bobbin; a stator having a magnet that is disposed in such a way as to face the coil block; elastic members coupled to a lower end of the bobbin and connected to both ends of the coil block; a base supporting the elastic members and the stator; and a cover can covering the mover, the stator and the base, with an opening being formed in the cover can to expose the lens therethrough, wherein each of the elastic members includes a terminal portion that extends between the cover can and a side surface of the base, the terminal portion including a short-circuit prevention portion so as to inhibit a short-circuit between the terminal portion and the cover can.

Disclosed is a voice coil motor, the motor including a mover having a bobbin equipped with a lens and a coil block secured to an outer circumference of the bobbin; a stator having a magnet that is disposed in such a way as to face the coil block; elastic members coupled to a lower end of the bobbin and connected to both ends of the coil block; a base supporting the elastic members and the stator; and a cover can covering the mover, the stator and the base, with an opening being formed in the cover can to expose the lens therethrough, wherein each of the elastic members includes a terminal portion that extends between the cover can and a side surface of the base, the terminal portion including a short-circuit prevention portion so as to inhibit a short-circuit between the terminal portion and the cover can.

A vibration motor includes a housing, a driving part, a vibration part, and spring components. The driving part and the vibration part are accommodated in the housing and the spring components are configured to connect the housing and the vibration part to suspend the vibration part in the housing. The vibration part includes a mass block and a magnet part, an accommodation space is defined in the mass block, and the magnet part is disposed in the accommodation space. The magnet part includes two soft magnetic blocks and a magnetic steel, the two soft magnetic blocks are disposed at intervals in a vibration direction of the vibration part, and the magnetic steel is clamped between the two soft magnetic blocks. The present disclosure provides the vibration motor using the single magnetic steel to ensure a driving force.

A vibration motor includes a housing, a driving part, a vibration part, and spring components. The driving part and the vibration part are accommodated in the housing and the spring components are configured to connect the housing and the vibration part to suspend the vibration part in the housing. The vibration part includes a mass block and a magnet part, an accommodation space is defined in the mass block, and the magnet part is disposed in the accommodation space. The magnet part includes two soft magnetic blocks and a magnetic steel, the two soft magnetic blocks are disposed at intervals in a vibration direction of the vibration part, and the magnetic steel is clamped between the two soft magnetic blocks. The present disclosure provides the vibration motor using the single magnetic steel to ensure a driving force.

Provided is a vibration actuator that includes: a fixing part including a coil, and a core around which the coil is wound, the core including both ends projecting from the coil; a movable part disposed adjacent and opposite to the both ends of the core with a gap provided therebetween in a direction crossing with a winding axis of the coil, the movable part including a yoke formed of a magnetic material, the movable part being fixable to an operation contact surface part that is operated by contact; and a plate-shaped elastic part fixed between the movable part and the fixing part, the plate-shaped elastic part including an elastically deformable bellows-shaped part, the plate-shaped elastic part elastically supporting the movable part to be movable with respect to the fixing part in a direction opposite to at least one of the both ends.

Disclosed is a voice coil motor, the motor including a mover having a bobbin equipped with a lens and a coil block secured to an outer circumference of the bobbin; a stator having a magnet that is disposed in such a way as to face the coil block; elastic members coupled to a lower end of the bobbin and connected to both ends of the coil block; a base supporting the elastic members and the stator; and a cover can covering the mover, the stator and the base, with an opening being formed in the cover can to expose the lens therethrough, wherein each of the elastic members includes a terminal portion that extends between the cover can and a side surface of the base, the terminal portion including a short-circuit prevention portion so as to inhibit a short-circuit between the terminal portion and the cover can.

Disclosed is a voice coil motor, the motor including a mover having a bobbin equipped with a lens and a coil block secured to an outer circumference of the bobbin; a stator having a magnet that is disposed in such a way as to face the coil block; elastic members coupled to a lower end of the bobbin and connected to both ends of the coil block; a base supporting the elastic members and the stator; and a cover can covering the mover, the stator and the base, with an opening being formed in the cover can to expose the lens therethrough, wherein each of the elastic members includes a terminal portion that extends between the cover can and a side surface of the base, the terminal portion including a short-circuit prevention portion so as to inhibit a short-circuit between the terminal portion and the cover can.

An electronic device for controlling an LRA (Linear Resonant Actuator) includes a signal generator, a driver, a delay unit, a sensor, and a DSP (Digital Signal Processor). The signal generator generates a digital signal. The driver drives the LRA according to the digital signal. The delay unit delays the digital signal for a predetermined time, so as to generate an estimated voltage signal. The sensor detects the current flowing through the LRA, so as to generate a sensing current signal. The DSP controls the resonant frequency or the gain value of the signal generator according to the estimated voltage signal and the sensing current signal.

An electronic device for controlling an LRA (Linear Resonant Actuator) includes a signal generator, a driver, a delay unit, a sensor, and a DSP (Digital Signal Processor). The signal generator generates a digital signal. The driver drives the LRA according to the digital signal. The delay unit delays the digital signal for a predetermined time, so as to generate an estimated voltage signal. The sensor detects the current flowing through the LRA, so as to generate a sensing current signal. The DSP controls the resonant frequency or the gain value of the signal generator according to the estimated voltage signal and the sensing current signal.

Provided is a vibration actuator that includes: a coil; a core around which the coil is wound, the core including both ends projecting from the coil; a yoke formed of a magnetic material and disposed opposite to the both ends of the core at a position adjacent to the both ends of the core with a gap provided between the yoke and the both ends of the core in a direction orthogonal to a winding axis of the coil; and an elastic part fixed between the core and the yoke and configured for elastic support to enable a movement between the core and the yoke in a direction opposite to at least one of the both ends of the core.