| 摘要 |
The invention relates to a piston (4) for a positioning device that can be operated by means of fluid, which piston has a one-piece piston body (16), in which an annular accommodating groove (25) is formed, which is coaxial to the longitudinal axis (5) of the piston (4) and which has two lateral groove flanks (33a, 33b) that face each other. A permanent magnet assembly (24) is arranged in the accommodating groove (25). The permanent magnet assembly consists of an elastic permanently magnetic magnet strip (35), which is bent into a ring structure and which has two strip end segments (35a, 35b) that face each other. The magnet strip (35) has a smaller width than the accommodating groove (25), wherein each of the two strip end segments (35a, 35b) of the magnet strip is firmly clamped in the accommodating groove (25). At least one clamping protrusion (46a, 47a; 46b, 47b) protruding from one of the groove flanks (33a, 33b) is responsible for the clamping. |
