US 9,883,291 B2Granted

Portable terminal

AssigneeKYOCERA Corporation

InventorsTooru Takahashi, Satoru Iwasaki, Yasuhito Fujii, Harumi Hayashi

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Abstract

There is provided a portable terminal capable of acquiring sound information successfully simply by being brought near to or into contact with the ear without the necessity of careful handling. The portable terminal includes at least a vibration member having a first surface exposed to an exterior, a vibration element operative to vibrate the vibration member in response to an electric signal corresponding to sound information, and electronic circuitry that outputs the electric signal, a difference in amplitude between individual places within the first surface of the vibration member in a vibrating state being less than or equal to 60 dB in terms of a ratio of maximum value to minimum value of amplitude. A portable terminal can be obtained that is capable of acquiring sound information successfully simply by being brought near to or into contact with the ear without the necessity of careful handling.

Claims8

Dependent claims

A portable terminal, comprising:

a piezoelectric vibration element that vibrates in bending mode;
an electronic circuitry;
a casing that forms an outer surface of the portable terminal and accommodates the piezoelectric vibration element and the electronic circuitry, the casing comprising a vibration plate, the casing having a first surface which is exposed to an exterior of the portable terminal and is a main surface of the vibration plate;
and
a first joining member interposed between the piezoelectric vibration element and the vibration plate, the first joining member being smaller than the vibration plate in coefficient of rigidity and having a thickness greater than an amplitude of bending vibration of the piezoelectric vibration element,
the piezoelectric vibration element having a surface which faces the vibration plate and vibrates the vibration plate,
the surface of the piezoelectric vibration element being entirely attached to the vibration plate via the first joining member,
wherein a difference in amplitude across the first surface of the casing in a vibrating state is less than or equal to 60 dB in terms of a ratio of maximum value to minimum value of amplitude.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application: 13/993,209Filed 26 Jul 2012
Priority: JP 2012-08074130 Mar 2012
Published: US 2015/0023530 A122 Jan 2015
Granted: 30 Jan 2018
Term ends: Not estimatedThe source records don’t support an estimate.

Classification7 codes

H04R 17/00
Piezoelectric transducers
B06B 1/0603
Operating with piezoelectric effect or with electrostriction: using a piezoelectric bender, e.g. bimorph
G10K 9/121
Electrically operated: flextensional transducers
H04R 2499/11
General applications: transducers incorporated or for use in hand-held devices, e.g. mobile phones, PDA's, camera's

Family

US 2015/0023530 A1Pre-grant publication · published 22 Jan 2015
US 9,883,291 B2This patent

From the US filing history. Foreign family members aren’t listed.

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