| 摘要 |
The invention relates to a piezoelectric drive which is used to create a relative movement between a first and a second body on a plane of movement. Said drive consists of flat metal sheet (1) which forms the first body or is fixed thereto and which is arranged parallel to the plane of movement. The metal sheet (1) has a region of non-operation (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 region of non-operation (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) in such a way that the longitudinal axis of the piezoelement (6) lies essentially on a longitudinal axis of the resonator area (4), said resonator area (4) protruding above the piezoelement (6) in the direction of said longitudinal axes (A), and forms a tapered horn shape (7). The second body (2) is positioned in relation to the sheet metal (1) in such a way that the at least one resonator area (4), with an edge area which is disposed at the top of said horn shape, is pressed against a surface (10) of the second body (2) which is oriented in an essentially oblique manner in relation to the plane of the sheet metal (1), by prestressing the spring area at a point of contact. The above-mentioned longitudinal axes (A) are oriented in an essentially parallel or tangential manner in relation to the relative movement to be produced at the point of contact. The drive can be embodied as a rotation motor or linear motor and is characterized by the simplicity of the construction thereof. |
