| 摘要 |
<p>The drive (5) has a magnetic circuit magnetically excited by a coil (10) that causes a magnetic flow in the magnetic circuit. A movably supported anchor (14) is arranged as a part of the magnetic circuit for passing through the parts of the magnetic flow of the magnetic circuit. An anchoring surface (17) includes an air gap with a counter surface (18) of the magnetic circuit. The anchoring surface and the counter surface are provided with an external middle recess (20) e.g. radial groove, where the recess concentrates magnetic flow in an environment on a small cross section.</p> |
