Piezoelectric drive

Details Piezoelectric drive Piezoelectric drive

2007-03-06

2007-03-06

Schuberg, Darren (Department: 2834)

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

C310S323190, C310S323030, C310S323090, C310S323010

Reexamination Certificate

active

10480006

ABSTRACT:
A piezoelectric drive that is used to create a relative movement between a first and a second body on a plane of movement. The drive includes a flat metal sheet (1) that forms, or is secured to, the first body and that is arranged parallel to the plane of movement. The metal sheet (1) has a rest region (3) and at least one resonator area (4). An elastic spring area (5), which is parallel to the plane of the metal sheet, is disposed between the rest region (3) and the resonator area (4). A flat, rectangular piezoelement (6), which can be excited in a 3,1 mode, is coupled to a longitudinal axis (A) such that the longitudinal axis of the piezoelement (6) lies essentially on a longitudinal axis of the resonator area (4). The resonator area (4) protrudes above the piezoelement (6) in the direction of the longitudinal axes (A), and forms a tapered horn shape (7). The second body (2) is positioned relative to the sheet metal (1) such that the at least one resonator area (4), with an edge area that is disposed at the top of the horn shape, is pressed against a surface (10) of the second body (2), which is oriented in an essentially oblique manner relative to the plane of the sheet metal (1), by prestressing the spring area at a point of contact.

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