Receiver and portable communication device
AssigneeStar Micronics Co., Ltd.
InventorsYoshio Imahori, Kiyoshi Urushibata, Isao Fushimi
Life of this patent
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Abstract
An electromagnetic receiver of a balanced armature type is employed as a receiver to be mounted in a portable telephone. The balance armature receiver has lower power consumption and higher electric acoustic conversion efficiency. The balanced armature receiver provides a required output even though small in size. The receiver occupies a considerably reduced space in the portable telephone, compared with a conventional portable telephone having a conventional dynamic receiver. The longitudinal wall of the receiver is parallel to the upper edge of a liquid crystal display panel, so that the liquid crystal display panel is extended upward and considerably enlarged.
Claims16
A balance armature type receiver to be mounted in a portable communication device that has a display panel, comprising:
- a housing;
- a diaphragm having a circumferential edge supported by the housing;
- a magnetic member disposed in the housing for defining a predetermined gap and for generating a direct-current magnetic field passing across the predetermined gap;
- a holding member made of magnetic material for holding the magnetic member;
- an armature inserted into the predetermined gap, fixed at a first predetermined position to the holding member, and coupled to the diaphragm at a second predetermined position via a drive pin;
- a coil disposed so as to surround the armature;
- a sound release hole on a top surface of the housing on a same side as the display panel;
- and
- a terminal to be connected to the portable communication device on an under surface that is an opposite side of the surface provided with the sound release hole,
- wherein the armature is distorted in response to a signal current applied to the coil, and thereby the diaphragm is vibrated, and
- the housing having an outer shape of a substantially rectangular parallelepiped having a wall face almost parallel to the center axis of the armature.
A portable communication device comprising a receiver mounted therein, the receiver comprising:
- a housing;
- a display panel
- a diaphragm having a circumferential edge supported by the housing;
- a magnetic member disposed in the housing for defining a predetermined gap and for generating a direct-current magnetic field passing across the predetermined gap;
- a holding member made of magnetic material for holding the magnetic member;
- an armature inserted into the predetermined gap, fixed at a first predetermined position to the holding member, and coupled to the diaphragm at a second predetermined position via a drive pin;
- a sound release hole on a same side as the display panel;
- and
- a coil disposed so as to surround the armature,
- wherein the armature is distorted in response to a signal current applied to the coil, and thereby the diaphragm is vibrated,
- wherein the armature extends from a rear wall of a C-shaped frame with a flat surface and a plane of the armature is perpendicular to the flat surface of the C-shaped portion.
Dependencies are inferred from the claim text.