Acoustic vibration generating element
First Claim
1. A bone conduction acoustic vibration generating element comprising a piezoelectric bimorph or unimorph element and covering members made of a flexible material and attached to at least two surfaces perpendicular to a thickness direction of the piezoelectric bimorph or unimorph element.
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Accused Products
Abstract
In an acoustic vibration generating element, a piezoelectric bimorph element or unimorph element is covered with a covering member of a flexible material at least on two surfaces perpendicular to a thickness direction. The covering member may be provided with a plurality of V-shaped grooves so as to improve a generated vibrating force. Alternatively, the covering member may be provided with an air chamber in the vicinity of a surface of one side so as to prevent sound leakage. Further, the covering member and an earhook may be integrally formed by the flexible material so as to achieve a light-weight acoustic vibration generating element suitable for a bone conduction speaker.
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Citations
12 Claims
- 1. A bone conduction acoustic vibration generating element comprising a piezoelectric bimorph or unimorph element and covering members made of a flexible material and attached to at least two surfaces perpendicular to a thickness direction of the piezoelectric bimorph or unimorph element.
- 7. A bone conduction acoustic vibration generating element comprising a piezoelectric bimorph or unimorph element and a covering member made of a flexible material and covering a whole of the piezoelectric bimorph element or the piezoelectric unimorph element.
Specification