Mobile terminal with electromagnetic actuator
AssigneeNamiki Seimitsu Houseki Kabushiki Kaisha
InventorsShoichi Kaneda, Kenji Ueno, Minoru Ueda
Life of this patent
Estimating the term…
Abstract
This invention deals with a portable terminal that reduces extraneous tones in a portable terminal in which is mounted an electromagnetic induction actuator that produces voice signals, a buzzer signal or a low frequency vibration. By short-circuiting the terminal fittings of the electromagnetic induction actuator or by connecting them electrically to amplifiers or to a signal generator that produces a constant voltage signal or a constant-frequency signal, the extraneous tone produced by vibration of the mechanical vibration system of the actuator is reduced.
Claims3
A portable terminal in which is mounted an electromagnetic induction actuator that has as its base a housing in which magnet with yoke and pole piece make up a magnetic circuit that is supported by leaf-spring to constitute mechanical vibration system, there being diaphragm fixed in open end of the housing, voice coil attached to the diaphragm, and terminal fittings that are placed on terminal seat projecting outward from side of the housing, the voice coil being connected electrically to the terminal fittings, in which the electromagnetic induction actuator have switching means that causes current to flow in the voice coil by short-circuiting the terminal fittings when the portable terminal is awaiting an incoming call.
A portable terminal in which is mounted an electromagnetic induction actuator that has as its base a housing in which magnet with yoke and pole piece make up a magnetic circuit that is supported by leaf-spring to constitute mechanical vibration system, there being diaphragm fixed in open end of the housing, voice coil attached to the diaphragm, and terminal fittings that are placed on terminal seat projecting outward from side of the housing, the voice coil being connected electrically to the terminal fittings, in which amplifier that is electrically connected to the terminal fittings and is normally set in operating state by application of a voltage, and which adjusts the output signal by feedback of signal found on the terminal fittings when the portable terminal is awaiting an incoming call.
Dependencies are inferred from the claim text.