| 摘要 |
On its internal circumference, the rotor magnet (1) has at least one spring tongue (4) which is formed integrally and has a locking tab (5) which engages in an annular groove (3) on the shaft circumference. The spring tongue (4) is undercut by a slot (7) which extends in the circumferential direction of the rotor magnet (1), is continuous from one end (1a) of the rotor magnet to the other end (1b) and is in the form of an arc of a circle, and in which a stop stud (8) is arranged, which is directed towards the spring tongue (4) and whose radial height is designed in such a manner that the spring tongue (4) comes to rest on the stop stud (8) even directly after a radial deflection which corresponds to the height of the locking tab (5). In consequence, despite the brittleness of the plastic-bonded magnet material of which the rotor magnet (1) is composed, the spring tongues (4) are prevented, in a simple manner, from being broken off during pushing onto a shaft (2). <IMAGE>
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