| 摘要 |
<p>The control device, in particular for program switches in electrical domestic appliances, has cams (1, 2) which control a multiplicity of contacts (1a, 2a). These cams can be turned by an electric motor (M) via a reduction gear. Part of this reduction gear comprises a satellite gear wheel (9) which is mounted in such a way that it can oscillate on an eccentric (10) and is in engagement with a planetary gear wheel (15) which for its part is seated firmly on an output gear wheel (14). This output gear wheel consequently turns at a non-constant rate. The splining of the output gear wheel (14) and of the cams (1, 2) is configured in such a way that, during each advancing step of the cams, they exhibit a rotational speed which successively runs through a first phase with a speed which is initially rapid and then slowed to zero, thereupon a second phase with zero speed and finally a third phase with a speed which initially grows and increases rapidly from zero. During the first and third phases, of about 0.2 seconds duration in each case, the contacts are actuated in two groups, to be precise during advancements of two half-steps of 3 DEG each at a time. …<IMAGE>… </p> |
