VIBRATION DEVICE
First Claim
1. A vibration device comprising:
- a first elastic plate that includes first and second ends and a first planar section disposed between the first and second ends;
a second elastic plate coupled to the second end of the first elastic plate and that includes a second planar section opposing the first planar section of the first elastic plate, the second elastic plate having a flexural rigidity higher than a flexural rigidity of the first elastic plate;
a piezoelectric vibrating element disposed on a surface on at least a portion of the first planar section of the first elastic plate and facing the second elastic plate; and
a weight coupled to the first end of the first elastic plate.
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Accused Products
Abstract
A vibration device is provided with reduced thickness and size while maintaining vibration strength. The vibration device includes a first elastic plate with first and second ends and a first planar section disposed between the first and second ends. Moreover, a second elastic plate is joined to the second end of the first elastic plate and includes a second planar section opposing the first planar section of the first elastic plate. The second elastic plate has a flexural rigidity that is higher than that of the first elastic plate. In addition, a piezoelectric vibrating element is disposed on in the first planar section of the first elastic plate to face the second elastic plate. A weight can be attached to the first end of the first elastic plate to facilitate vibration.
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Citations
20 Claims
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1. A vibration device comprising:
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a first elastic plate that includes first and second ends and a first planar section disposed between the first and second ends; a second elastic plate coupled to the second end of the first elastic plate and that includes a second planar section opposing the first planar section of the first elastic plate, the second elastic plate having a flexural rigidity higher than a flexural rigidity of the first elastic plate; a piezoelectric vibrating element disposed on a surface on at least a portion of the first planar section of the first elastic plate and facing the second elastic plate; and a weight coupled to the first end of the first elastic plate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A vibration device comprising:
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a first elastic plate with opposing first and second ends and a planar section disposed therebetween; a second elastic plate coupled to the first elastic plate and that includes a second planar section that faces the first planar section of the first elastic plate; and a piezoelectric vibrating element disposed on the first planar section of the first elastic plate and configured to vibrate the first elastic plate upon excitation, wherein one of the first and second elastic plates includes a linking member that extends towards the other of the first and second elastic plates and that couples the second elastic plate to the first elastic plate, and wherein the second elastic plate has a flexural rigidity higher than a flexural rigidity of the first elastic plate, such the second elastic plate is configured to flexurally deform less than the first elastic plate upon the excitation of the piezoelectric vibrating element. - View Dependent Claims (18, 19, 20)
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Specification