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.

Abstract: A piezoelectric vibration component and a portable terminal each include a piezoelectric vibration element 14 and a power supply line 51. The piezoelectric vibration element 14 includes at least: a layered structure 20 in which a plurality of internal electrodes and piezoelectric layers are layered in a first direction; and surface electrodes 33 and 31 electrically connected to the internal electrodes. The piezoelectric vibration element 14 bends and vibrates, and its amplitude changes in a second direction perpendicular to the first direction. The power supply line 51 includes at least: a conductive path 53 including a connection part 56 bonded to a surface electrode 33; and a conductive path 52 including a connection part 57 bonded to a surface electrode 31. The connection part 56 has a plurality of partial electrodes 56a and 56b that extend in a third direction perpendicular to both the first direction and the second direction.

Abstract: A piezoelectric vibration device capable of allowing a low profile and generating strong vibration, and a portable terminal using the same are provided. Disclosed are a piezoelectric vibration device at least including a support body (11); a vibration member (12) mounted to the support body (11) so as to vibrate; a vibration element (14) capable of being subjected to bending vibration; and a deformable first connecting member (13) interposed between a first surface that is a bending surface of the vibration element (14) and one main surface of the vibration member (12), and a portable terminal using the same. A piezoelectric vibration device capable of allowing a low profile and generating strong vibration, and a portable terminal can be obtained.

Abstract: A piezoelectric vibration element capable of reducing occurrence of unnecessary vibration, and a piezoelectric vibration device and a portable terminal using the same are disclosed. The piezoelectric vibration element includes a plurality of electrode layers and a plurality of piezoelectric layers being stacked along a first direction, the piezoelectric vibration element having two surfaces that face each other to be at intervals in the first direction, and vibrating in bending mode in the first direction with an amplitude varying along a second direction perpendicular to the first direction according to input of an electric signal, one of the two surfaces having such a shape that a central portion thereof in a third direction perpendicular to the first direction and the second direction protrudes as compared with opposite end portions thereof in the third direction.

Abstract: A piezoelectric vibration element capable of reducing occurrence of unnecessary vibration, and a piezoelectric vibration device and a portable terminal using the same are disclosed. The piezoelectric vibration element includes a plurality of electrode layers and a plurality of piezoelectric layers being stacked along a first direction, the piezoelectric vibration element having two surfaces that face each other to be at intervals in the first direction, and vibrating in bending mode in the first direction with an amplitude varying along a second direction perpendicular to the first direction according to input of an electric signal, one of the two surfaces having such a shape that a central portion thereof in a third direction perpendicular to the first direction and the second direction protrudes as compared with opposite end portions thereof in the third direction.

Abstract: A low-profile vibration device capable of generation of great vibration and a portable terminal employing the vibration device. The vibration device includes: a support body; a vibration member supported so that its periphery is connected to the support body, the vibration member having a first portion which is connected to the support body, and a second portion which is located inside the first portion and is not connected to the support body; and a vibration element whose one surface in a first direction is connected to one main surface of the second portion in the vibration member, bending vibration of the vibration element in the first direction whose amplitudes vary along a second direction perpendicular to the first direction being caused by electrical signal input.

Abstract: A piezoelectric vibration device capable of being made thin and generating strong vibration, and a portable terminal using the same. Disclosed are a piezoelectric vibration device including at least: a support body; a vibration member that is mounted to the support body to be able to vibrate; a vibration element capable of being independently subjected to bending vibration by application of an electric signal; and a deformable first connecting member that is at least partly formed of a viscoelastic body, the deformable first connecting member being disposed between a first surface of the vibration element that is a bending surface and one main surface of the vibration member, and connecting the first surface of the vibration element and the one main surface of the vibration member, and a portable terminal using the piezoelectric vibration device.

Abstract: A piezoelectric vibration component and a portable terminal each include a piezoelectric vibration element 14 and a power supply line 51. The piezoelectric vibration element 14 includes at least: a layered structure 20 in which a plurality of internal electrodes and piezoelectric layers are layered in a first direction; and surface electrodes 33 and 31 electrically connected to the internal electrodes. The piezoelectric vibration element 14 bends and vibrates, and its amplitude changes in a second direction perpendicular to the first direction. The power supply line 51 includes at least: a conductive path 53 including a connection part 56 bonded to a surface electrode 33; and a conductive path 52 including a connection part 57 bonded to a surface electrode 31. The connection part 56 has a plurality of partial electrodes 56a and 56b that extend in a third direction perpendicular to both the first direction and the second direction.

Abstract: A low-profile vibration device capable of generation of great vibration and a portable terminal employing the vibration device. The vibration device includes: a support body; a vibration member supported so that its periphery is connected to the support body, the vibration member having a first portion which is connected to the support body, and a second portion which is located inside the first portion and is not connected to the support body; and a vibration element whose one surface in a first direction is connected to one main surface of the second portion in the vibration member, bending vibration of the vibration element in the first direction whose amplitudes vary along a second direction perpendicular to the first direction being caused by electrical signal input.

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.

Abstract: A piezoelectric vibration element capable of reducing occurrence of unnecessary vibration, and a piezoelectric vibration device and a portable terminal using the same are disclosed. The piezoelectric vibration element includes a plurality of electrode layers and a plurality of piezoelectric layers being stacked along a first direction, the piezoelectric vibration element having two surfaces that face each other to be at intervals in the first direction, and vibrating in bending mode in the first direction with an amplitude varying along a second direction perpendicular to the first direction according to input of an electric signal, one of the two surfaces having such a shape that a central portion thereof in a third direction perpendicular to the first direction and the second direction protrudes as compared with opposite end portions thereof in the third direction.

Abstract: A piezoelectric vibration device capable of being made thin and generating strong vibration, and a portable terminal using the same. Disclosed are a piezoelectric vibration device including at least: a support body; a vibration member that is mounted to the support body to be able to vibrate; a vibration element capable of being independently subjected to bending vibration by application of an electric signal; and a deformable first connecting member that is at least partly formed of a viscoelastic body, the deformable first connecting member being disposed between a first surface of the vibration element that is a bending surface and one main surface of the vibration member, and connecting the first surface of the vibration element and the one main surface of the vibration member, and a portable terminal using the piezoelectric vibration device.

Abstract: A piezoelectric vibration device capable of allowing a low profile and generating strong vibration, and a portable terminal using the same are provided. Disclosed are a piezoelectric vibration device at least including a support body (11); a vibration member (12) mounted to the support body (11) so as to vibrate; a vibration element (14) capable of being subjected to bending vibration; and a deformable first connecting member (13) interposed between a first surface that is a bending surface of the vibration element (14) and one main surface of the vibration member (12), and a portable terminal using the same. A piezoelectric vibration device capable of allowing a low profile and generating strong vibration, and a portable terminal can be obtained.

Abstract: A piezoelectric ceramic composition comprising a perovskite compound which contains, as metal components, Pb, Sr, Zr, Ti, Nb, Cr, Y, Co and at least one element selected from La, Gd, Nd, Sm and Pr, and may further contain Sb or Na, wherein when the composition formula is expressed as,(Pb.sub.1-x-.alpha.-y Sr.sub.x Na.sub..alpha. M.sub.y).sub.a [(Nb.sub.b Y.sub.c Cr.sub.d Co.sub.e Sb.sub..beta.).sub.f Ti.sub.g Zr.sub.1-f-g ]O.sub.3,wherein M is at least one element selected from La, Gd, Nd, Sm and Pr, then, x, y, a, b, c, d, e, f, g, .alpha. and .beta. satisfy the following relationships, 0.005.ltoreq.x.ltoreq.0.08, 0.002.ltoreq.y.ltoreq.0.05, 0.95.ltoreq.a.ltoreq.1.05, 0.47.ltoreq.b.ltoreq.0.70, 0.02.ltoreq.c.ltoreq.0.31, 0.11.ltoreq.d.ltoreq.0.42, 0.01.ltoreq.e.ltoreq.0.12, 0.02.ltoreq.f.ltoreq.0.15, 0.46.ltoreq.g.ltoreq.0.52, 0.ltoreq..alpha..ltoreq.0.005, 0.ltoreq..beta..ltoreq.0.13, and b+c+d+e+.beta.=1.00.