| 摘要 |
The drive unit (10) contains an exciter winding (11), an magnetic armature part (15) which is set into an oscillating vibration movement,by the magnetic field of the winding, about a center position (Mp) in an axial direction (x) and at least one spring (2, 2') which is clamped in a fixed manner in a clamping position (B, B') and whose oscillating end (A, A') engages with the armature part (15), acting in the direction of movement. In the center position (Mp) of the armature part (15), the point of engagement (A, A') of the spring (2, 2') with the armature part (15) is axially offset by a predetermined distance (Deltax) in relation to the clamping position (B, B') in order to appropriately offset the armature part when in a rest position. ® KIPO & WIPO 2007
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