ELECTRONIC APPARATUS
An electronic apparatus includes a substrate and an oscillation device ( 100 ) which is supported over the substrate, wherein the oscillation device ( 100 ) includes a piezoelectric element ( 110 ), a vibrating member ( 120 ) which binds one surface of the piezoelectric element ( 110 ), and a tubular support member ( 140 ) which supports an outer edge portion of the vibrating member ( 120 ) in an inner surface and is joined to the substrate so that an opening of one end side is closed by the substrate, and the support member ( 140 ) includes at least one hole ( 141 ) which connects a space, which is surrounded by the substrate and the vibrating member ( 120 ) in an inner portion of the support member ( 140 ), to an outer portion of the support member ( 140 ).
1 . An electronic apparatus comprising:
a substrate; and
an oscillation device which is supported over the substrate,
wherein the oscillation device includes:
a piezoelectric element;
a vibrating member which binds one surface of the piezoelectric element; and
a tubular support member which supports an outer edge portion of the vibrating member in an inner surface and is joined to the substrate so that an opening of one end side is closed by the substrate, and
wherein the support member includes at least one hole which connects a space, which is surrounded by the substrate and the vibrating member in an inner portion of the support member, to an outer portion of the support member.
2 . The electronic apparatus according to claim 1 ,
wherein the hole is configured by a concave portion which is provided in an end surface of the one end side of the support member.
3 . The electronic apparatus according to claim 1 ,
wherein the support member includes a plurality of the holes which are disposed at equal intervals to each other.
4 . The electronic apparatus according to claim 1
wherein an planar shape of the piezoelectric element is circular, and the support member is formed in a cylindrical shape.
5 . The electronic apparatus according to claim 1 ,
wherein an planar shape of the piezoelectric element is rectangular, and the support member is formed in a rectangular square cylindrical shape.
6 . The electronic apparatus according to claim 1 ,
wherein oscillating frequency of the piezoelectric element is equal to or more than 20 kHz.
7 . The electronic apparatus according to claim 1 ,
wherein the piezoelectric element includes a laminated structure in which piezoelectric layers and electrode layers are alternately laminated.
8 . The electronic apparatus according to claim 1 ,
wherein the piezoelectric element outputs ultrasonic waves which are modulated for a parametric speaker.
9 . The electronic apparatus according to claim 1 , further comprising:
an oscillation drive unit which makes the oscillation device output ultrasonic waves for a sensor;
a ultrasonic wave detection unit which detects the ultrasonic waves for the sensor reflected by an objected to be measured; and
a distance measurement unit which calculates a distance between the oscillation device and the object to be measured based on a time from when the ultrasonic waves for the sensor are output from the oscillation device until the ultrasonic waves for the sensor are detected by the ultrasonic wave detection unit.