ASSEMBLING PROCEDURE FOR A PIEZOELECTRIC MOTOR

摘要

Disclosed is an assembling procedure for a piezoelectric motor, said piezoelectric motor comprising a housing (2), a movable unit (3), a circuit board (4) having integrated at least an actuator (5) for driving the movable unit (3), a bearing structure (6) for movably bearing the movable unit and a spring element (7), the assembling procedure comprising the following steps: placing the housing; providing the housing and/or the movable unit with the bearing structure; joining the movable unit and the housing; placing the circuit board on the movable unit; placing the spring element at the housing; moving the spring element in direction of the circuit board and pushing the spring element against the circuit board till a defined force for holding the spring element in place is reached; fixing the spring element at the housing such that the spring element holds and presses together the housing, the movable unit and the circuit board with a defined force, thereby realizing a defined contact force at the contact between the actuator and the movable unit. The invention also relates to a piezoelectric motor comprising a housing, a movable unit, a circuit board having integrated at least an actuator for driving the movable unit, a bearing structure for movably bearing the movable unit and a spring element, with the movable unit, the circuit board, the actuator and the bearing structure being housed in the housing and with the spring element being fixed to the housing and being in contact with the circuit board such that the circuit board is pressed over a friction element of its integrated actuator against the friction component of the movable unit, whereby the movable unit is pressed against the housing via the bearing structure, being preferably a three-point bearing structure.