US 2020/0266331 A1Published application

Displacement magnification device

AssigneeAzbil Corporation

InventorTakao MIZUUCHI

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Abstract

A displacement magnification device has a first link portion including a first rigid body and a first plate spring that couples the first rigid body to a supporting portion and a movable portion. A second link portion includes a first rigid body and a second plate spring that couples the first rigid body to the supporting portion and the movable portion. In this structure, the first rigid body and the second rigid body play roles to suppress the bending of the first plate spring and the second plate spring. In addition, a connection portion between the first plate spring and the supporting portion, a connection portion between the second plate spring and the supporting portion, a connection portion between the first plate spring and the movable portion, and a connection portion between the second plate spring and the movable portion play roles of elastic hinges.

Claims9

Dependent claims

A displacement magnification device comprising:

a piezoelectric element;
and
a displacement magnification mechanism configured to magnify an amount of displacement of the piezoelectric element,
wherein the displacement magnification mechanism comprises a supporting portion supporting the piezoelectric element, a movable portion facing and spaced apart from the supporting portion, and a pair of mutually parallel link portions coupling the supporting portion to the movable portion,
wherein the piezoelectric element is mounted to the supporting portion so as to be displaced orthogonally to a direction in which the supporting portion faces the movable portion, and
wherein one of the pair of link portions comprises a first rigid body having a pressure receiving surface that receives a force generated by displacement of the piezoelectric element and a first plate spring that couples the first rigid body to the supporting portion and the movable portion.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/785,835Filed 10 Feb 2020
Priority: JP 2019-02716919 Feb 2019
Published: 20 Aug 2020
Term ends: Not estimatedThe source records don’t support an estimate.

Classification6 codes

H02N 2/043
Constructional details: mechanical transmission means, e.g. for stroke amplification
H10N 30/886
Mounts; Supports; Enclosures; Casings: additional mechanical prestressing means, e.g. springs
H10N 30/101
Piezoelectric or electrostrictive devices: with electrical and mechanical input and output, e.g. having combined actuator and sensor parts
H10N 30/50
Piezoelectric or electrostrictive devices: having a stacked or multilayer structure