Double bimorph electromechanical element
First Claim
1. An electromechanical motor, comprising:
- a stator part (24), a body (20) to be moved, and at least one monolithic electromechanical element (30);
said monolithic electromechanical element (30) having a general elongated shape, extending substantially parallel to a main displacement direction (X) of said body (20);
said monolithic electromechanical element (30) comprising a first displacement portion (32A) and a second displacement portion (32B) interconnected by a passive section (31);
said first displacement portion (32A) and said second displacement portion (32B) in turn comprising a first bimorph section (33A) and a second bimorph section (33B), respectively;
said first and second bimorph sections extending in an elongation direction of said monolithic electromechanical element (30) and having at least two active volumes each (14A, 14B, 16A, 16B) and electrodes (12) for activation of said active volumes (14A, 14B, 16A, 16B);
said active volumes (14A, 14B, 16A, 16B) having at least one electromechanical layer each;
a perpendicular to a main surface of said electromechanical layers and said electrodes, respectively, being arranged substantially perpendicular to a surface of said body, on which said monolithic electromechanical element acts;
said passive section (31) having an actuating surface (34C);
said first displacement portion (33A) and said second displacement portion (33B) having an attaching portion (36A, 36B) each arranged at a distance from said passive section (31); and
said active volumes (14A, 14B, 16A, 16B) being activatable in at least two different combinations, whereby said actuating surface (34C) is movable with respect to said attaching portions (36A, 36B) in a two-dimensional space (X, Z).
1 Assignment
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Accused Products
Abstract
The present invention discloses motors using electromechanical, preferably piezoelectric, elements (30). The element (30) comprises at least two movable parts or displacement portions (32A, 32B) interconnected by a passive part (31). Each displacement section (32A, 32B) comprises at least one bimorph (33A, 33B), where the active volumes extend in parallel out from the passive part (31), and so are the electrodes (12) arranged between the electromechanical layers. The displacement portions (32A, 32B) are positioned in substantially the same plane and parallel to the body (20) to be moved. Contact portions are arranged at the central passive part (31) and at the displacement portions (32A, 32B). In one embodiment, the central contact portion is an actuating surface (34C) and the other are attaching portions (36A, 36B) for attachment to a stator (24). In another embodiment, the central contact portion is an attaching portion and the other are actuating surfaces. The actuating surfaces (34C) are in both cases movable relative to the attaching portions (36A, 36B) in two dimensions.
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Citations
22 Claims
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1. An electromechanical motor, comprising:
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a stator part (24), a body (20) to be moved, and at least one monolithic electromechanical element (30);
said monolithic electromechanical element (30) having a general elongated shape, extending substantially parallel to a main displacement direction (X) of said body (20);
said monolithic electromechanical element (30) comprising a first displacement portion (32A) and a second displacement portion (32B) interconnected by a passive section (31);
said first displacement portion (32A) and said second displacement portion (32B) in turn comprising a first bimorph section (33A) and a second bimorph section (33B), respectively;
said first and second bimorph sections extending in an elongation direction of said monolithic electromechanical element (30) and having at least two active volumes each (14A, 14B, 16A, 16B) and electrodes (12) for activation of said active volumes (14A, 14B, 16A, 16B);
said active volumes (14A, 14B, 16A, 16B) having at least one electromechanical layer each;
a perpendicular to a main surface of said electromechanical layers and said electrodes, respectively, being arranged substantially perpendicular to a surface of said body, on which said monolithic electromechanical element acts;
said passive section (31) having an actuating surface (34C);
said first displacement portion (33A) and said second displacement portion (33B) having an attaching portion (36A, 36B) each arranged at a distance from said passive section (31); and
said active volumes (14A, 14B, 16A, 16B) being activatable in at least two different combinations, whereby said actuating surface (34C) is movable with respect to said attaching portions (36A, 36B) in a two-dimensional space (X, Z). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. An electromechanical motor, comprising:
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a stator with a metallized flexible circuit board;
an electromechanical element comprising first and second bimorph sections and a passive section that is between said first and second bimorph sections, said passive element comprising an actuating surface; and
said first bimorph section at a distal end thereof in turn comprising a first attachment portion that attaches said distal end of said first bimorph section to said stator, and said second bimorph section at a distal end thereof in turn comprising a second attachment portion that attaches said distal end of said second bimorph section to said stator, said metallized flexible circuit board pressing said electromechanical element toward a body to be moved by said motor.
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21. An electromechanical motor, comprising:
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a stator having a circuit board with two flexible tabs on a surface thereof;
an electromechanical element comprising first and second bimorph sections, and a passive section that is between said first and second bimorph sections, said passive element in turn comprising an actuating surface; and
said first bimorph section at a distal end thereof in turn comprising a first attachment portion that attaches said distal end of said first bimorph section to one of said two tabs and said second bimorph section at a distal end thereof in turn comprising a second attachment portion that attaches said distal end of said second bimorph section to the other of said two tabs. - View Dependent Claims (22)
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Specification