Actuator
First Claim
Patent Images
1. An actuator, comprising:
- at least one beam including an oscillating part;
a case including at least one space in which the beam is housed and at least one holding part to fix one end of the beam in the case;
at least one feeding terminal to supply an exciting power to the beam;
a limiting structure formed on at least one inner surface of the case which defines the space and is configured to contact the oscillating part of the beam and prevent excess deflection of the oscillating part; and
wherein the inner surface is curved or tapered so that the space formed by the curved or tapered inner surface gradually increases with distance from the holding part of the beam in a longitudinal direction of the beam.
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Accused Products
Abstract
An actuator, comprising a beam (2) including a laminated structure which has piezoelectric layers (30, 31, 32) and electrode layers (20, 21, 22, 23), a holding mechanism to hold the beam, a feeding terminal (10) to supply an exciting power to the electrode layers of the beam, and a contact mechanism provided in the holding mechanism, the holding mechanism comprising a case (1) including a space (5) to house the beam (2) and a holding part to hold at least one of an end and a central portion of the beam (2), the contact mechanism being configured to contact with a part of the beam (2) and prevent the beam from excessively deflecting when a great impact is added to the beam.
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Citations
12 Claims
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1. An actuator, comprising:
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at least one beam including an oscillating part; a case including at least one space in which the beam is housed and at least one holding part to fix one end of the beam in the case; at least one feeding terminal to supply an exciting power to the beam; a limiting structure formed on at least one inner surface of the case which defines the space and is configured to contact the oscillating part of the beam and prevent excess deflection of the oscillating part; and wherein the inner surface is curved or tapered so that the space formed by the curved or tapered inner surface gradually increases with distance from the holding part of the beam in a longitudinal direction of the beam. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification