Actuator support structure and pump device

摘要

A piezoelectric pump includes a leaf spring including a disc portion defining an actuator, an outer frame portion defining a housing, and an elastic support portion. The actuator flexurally vibrates from a center portion of a principal surface thereof to an outer periphery thereof. The elastic support portion includes a beam portion and connection portions and elastically supports the disc portion on the outer frame portion. The beam portion extends in a gap between the disc portion and the outer frame portion in a direction along an outer periphery of the disc portion. A first of the connection portions connects the beam portion to the disc portion. Second and third connection portions are offset from the first connection portion and connect the beam portion to the outer frame portion.

主权项

1. An actuator support structure comprising:
a plate-shaped actuator arranged to flexurally vibrate from a center portion of a principal surface thereof to an outer peripheral portion thereof; a side wall surrounding an outer periphery of the actuator; and a plurality of elastic support portions elastically supporting the outer periphery of the actuator to the side wall, the plurality of elastic support portions being separately provided and spaced apart from one another around the outer periphery of the actuator; wherein each of the plurality of elastic support portions includes:
a beam portion extending in a gap between the actuator and the side wall in a circumferential direction along the outer periphery of the actuator;an actuator connection portion connecting the beam portion to the actuator;two side wall connection portions provided in respective positions offset from the actuator connection portion in the direction along the outer periphery of the actuator, each side wall connection portion connecting the beam portion to the side wall; and the side wall connection portions extend outward in a radial direction from the beam portion towards the side wall and are directly connected to the side wall.