| 摘要 |
An automatic coffee machine (1) includes a sliding block (28) fixedly connected to a housing (2). A brewing unit (5) includes an upper locking element (7), a lower locking element (8) and a vertical tube section (4). The upper locking element is alternately moved in a brewing position, a stand-by position and a parking position. The upper locking element in the brewing position protrudes into the tube section to attain a brewing chamber (6). The upper locking element in the stand-by position does not protrude into the tube section and the axis of the upper locking element is aligned with the axis (9) of the tube section. The upper locking element in the parking position does not protrude into the tube section and the axis of the upper locking element is not aligned with the axis of the tube section. A pivot column (15) connected to the upper locking element is moved in an axial direction, and it is rotated about its axis. The pivot column includes a sliding path (23) including a first portion (24) parallel to the axis of the pivot column and a second portion (25) extending in a way similar to a thread. The sliding block engages the first portion to alternately attain the brewing position and the stand-by position. The sliding block engages the second portion to alternately attain the stand-by position and the parking position.
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