Piezoelectric vibration device and portable terminal using the same

#The present invention relates to a piezoelectric vibration device and a portable terminal using the same.

#In the related art, a piezoelectric vibration device has been proposed, in which a plate-like piezoelectric bimorph element and a vibration plate are disposed with an interval and one end of the piezoelectric bimorph element in a length direction thereof, is fixed to the vibration plate (for example, refer to Patent Literature 1).

#Patent Literature 1: Japanese Unexamined Patent Publication JP-A 2006-238072.

#FIG. 1 is a perspective view schematically illustrating a piezoelectric vibration device and a portable terminal according to an embodiment of the invention;

#FIG. 2 is a cross-sectional view taken along the line A-A′ in FIG. 1;

#FIG. 3 is a cross-sectional view taken along the line B-B′ in FIG. 1;

#Hereinafter, a piezoelectric vibration device and a portable terminal according to the invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a perspective view schematically illustrating a piezoelectric vibration device and a portable terminal according to an embodiment of the invention. FIG. 2 is a cross-sectional view taken along the line A-A′ in FIG. 1. FIG. 3 is a cross-sectional view taken along the line B-B′ in FIG. 1.

#As shown in FIGS. 1 to 3, the piezoelectric vibration device of the embodiment includes a support body 11, a vibration plate 12, a first connecting member 13, a vibration element 14, and a second connecting member 16. Further, a portable terminal of the embodiment includes a display 18 and an electronic circuit (not shown), in addition to the piezoelectric vibration device. Here, the support body 11 of the piezoelectric vibration device functions as a casing 19 in the portable terminal, and the vibration plate 12 of the piezoelectric vibration device functions as a cover of the display 18 in the portable terminal.

#The support body 11 has a box shape with one open surface. The support body 11 may be formed by favorably using a material having a high rigidity and elasticity such as a synthetic resin, for example. Further, the support body 11 functions as a support body that supports the vibration plate 12 to be able to vibrate in the piezoelectric vibration device, and functions as the casing 19 in the portable terminal.