Piezoelectric actuating apparatus

A piezoelectric actuating apparatus, comprising a frame, a rotatable element, an actuating structure, and a sensing structure, wherein

• the frame has an accommodating opening and a first side and a second side that define the accommodating opening and are opposite to each other;
• the rotatable element is disposed in the accommodating opening and connected to the frame through a rotating shaft structure, the rotating shaft structure has an axis, and the rotatable element is configured to reciprocatingly swing relative to the frame around the axis as a center;
• the actuating structure extends from the first side of the frame and is located between the rotatable element and the first side of the frame, the actuating structure is elastically coupled to the rotatable element through at least one first elastic component, the actuating structure has an actuating body, a first piezoelectric material layer, and a driving electrode disposed on a side of the first piezoelectric material layer, and the first piezoelectric material layer is disposed on the actuating body;
• and
• the sensing structure extends from the second side of the frame and is located between the rotatable element and the second side, the sensing structure is elastically coupled to the rotatable element through at least one second elastic component, the sensing structure has a sensing body, a second piezoelectric material layer, and a sensing electrode disposed on a side of the second piezoelectric material layer, the second piezoelectric material layer is disposed on the sensing body, and the at least one first elastic component and the at least one second elastic component are respectively disposed on two opposite sides of the axis,
• wherein the actuating structure is deformed by receiving a driving signal through the driving electrode, and drives the rotatable element to rotate around the axis as a central axis through the at least one first elastic component, and the rotating rotatable element is linked to the sensing structure through the at least one second elastic component to be correspondingly deformed, and outputs a sensing signal through the sensing electrode,
• wherein the rotatable element has a first side and a second side opposite to each other along an axial direction of the axis, the rotating shaft structure comprises a first portion and a second portion, the first portion is connected to the first side of the rotatable element, and the second portion is connected to the second side of the rotatable element,
• wherein the frame further has a third side and a fourth side that define the accommodating opening and are opposite to each other, the third side and the fourth side connect with the first side and the second side, the first portion of the rotating shaft structure is further connected to the third side of the frame, and the second portion of the rotating shaft structure is further connected to the fourth side of the frame.