ELECTRICAL/MECHANICAL/SOUND CONVERTER AND APPARATUS OF ELECTRICAL/MECHANICAL/SOUND CONVERSION

Title:

ELECTRICAL/MECHANICAL/SOUND CONVERTER AND APPARATUS OF ELECTRICAL/MECHANICAL/SOUND CONVERSION

Document Type and Number:

WIPO Patent Application WO/2000/000299

Kind Code:

A1

Abstract:

An electrical/mechanical/sound converter capable of stable operation when used in a mobile terminal such as a cellular phone to generate vibration for indicating an incoming call. The electrical/mechanical/sound converter comprises a housing (1a), and a detector coil (11) provided near a moving part (2) forming a magnetic circuit fitted with a suspension (3) into an opening in the housing (1a) to generate an excitation voltage from the vibration of the moving part (2). The electrical/mechanical/sound converter allows the detector coil (11) to detect strong vibrations of the moving part (2) in resonance as excitation voltage and feed it back, and provides extremely steady vibration even if the resonance frequency changes with variations in ambient temperature, etc.

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Inventors:

ENOMOTO MITSUTAKA (JP)
HIRATA MASAKUNI (JP)
FUKUYAMA TAKANORI (JP)
KUZE MITSUKAZU (JP)

Application Number:

PCT/JP1999/003504

Publication Date:

January 06, 2000

Filing Date:

June 29, 1999

Export Citation:

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Assignee:

MATSUSHITA ELECTRIC IND CO LTD (JP)
ENOMOTO MITSUTAKA (JP)
HIRATA MASAKUNI (JP)
FUKUYAMA TAKANORI (JP)
KUZE MITSUKAZU (JP)

International Classes:

B06B1/02; B06B1/04; G10K9/12; H04M19/04; (IPC1-7): B06B1/04

Foreign References:

JPH10174408A	1998-06-26
JPH0248084A	1990-02-16
JPH0952071A	1997-02-25
JPH08238901A	1996-09-17

Other References: