| 摘要 |
The invention relates to a blank having two blank plates (20, 22), which can be adjusted with respect to each other about a rotational axis (24), and of which a first blank plate (20) comprises an inner toothed rim (26), and a second blank plate (22) forms radial guides (28) for at least two gate valves (30), the gate valves (30) comprising a toothed region, which interacts with the inner toothed rim (26), and the blank further comprising a releasing device moving the gate valves (30) from a generally present locking position, in which the same are engaged in the inner toothed rim (26), into a releasing position, characterized in that a spring (42) configured as a stamping is provided, which extends at least across 180° and which has a number of contact regions (44) corresponding to the number of gate valves (30), that in each case a contact region (44) rests against a gate valve (30), and that the spring (42) has a contact spring (46) for each contact region (44). |
