US 5,524,061 AGranted

Dual mode transducer for a portable receiver

AssigneeMotorola, Inc.

InventorsCharles W. Mooney, John M. McKee, Gerald E. Brinkley, Irving H. Holden

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Abstract

A dual mode transducer (600) includes an electromagnetic driver (604), an armature including upper and lower substantially parallel planar suspension members (610) coupled to the driver (604), and a magnetic motional mass (616) suspended between the suspension members (610). The suspension members (610) include a plurality of independent planar non-linear spring members (612) arranged regularly about the central region (614) within a perimeter region (608). The spring members (612) are defined by members having maximum opposing widths tapering to minimum opposing widths at midpoints thereon, the maximum opposing widths are coupled to the central region (614) and to the perimeter region (608). The motional mass (616) couples to the electromagnetic field which alternately moves the motional mass (616), the movement being transformed through the spring members (612) and the driver (604) into motional energy. A soundboard (1014), coupled to the driver (604), couples the motional energy to a user.

Claims21

Dependent claims

A dual mode transducer, comprising:

an electromagnetic driver, for effecting an alternating electromagnetic field in response to an input signal;
an armature, including upper and lower substantially parallel planar suspension members, coupled to said electromagnetic driver, said upper and lower substantially parallel planar suspension members each comprising
a plurality of independent planar non-linear spring members arranged regularly about a central planar region within a planar perimeter region, said plurality of independent planar non-linear spring members being defined by members having maximum opposing widths tapering to minimum opposing widths at midpoints thereon, said maximum opposing widths being coupled to said central planar region and to said planar perimeter region;
a magnetic motional mass suspended between said upper and lower substantially parallel planar suspension members about said central planar region, and coupled to said alternating electromagnetic field for alternately moving said magnetic motional mass in response thereto, wherein movement of said magnetic motional mass is transformed through said plurality of independent planar non-linear spring members and said electromagnetic driver into motional energy;
and
a soundboard, coupled to said electromagnetic driver, for coupling the motional energy to a user.

3 more elements

A personal communication device comprising:

a housing having a portion thereof forming a soundboard;
a receiver, enclosed within said housing, for receiving and detecting coded message signals transmitted thereto;
processing means for processing the detected coded message signals;
and
a dual mode transducer including
an electromagnetic driver, coupled to said soundboard and to said processing means, for effecting an alternating electromagnetic field in response to the processed coded message signals being coupled thereto, and
a resonant armature system, coupled to said electromagnetic driver, and comprising a magnetic motional mass being attached to a central planar region about which are regularly arranged a plurality of independent planar non-linear spring members defined by members having maximum opposing widths tapering to minimum opposing widths at midpoints thereon arranged within a planar perimeter region,
a plurality of independent planar non-linear spring members arranged regularly about a central planar region within a planar perimeter region,
said resonant armature system being responsive to the alternating electromagnetic field for alternately moving said magnetic motional mass, wherein motion induced thereby being transformed through said plurality of independent planar non-linear spring members and said electromagnetic driver into motional energy which is coupled through said soundboard to a user.

6 more elements

Dependencies are inferred from the claim text.