| 摘要 |
The infusion unit (1) for a coffee machine, comprising a closing piston (3), an infusion cylinder (2), an ejection piston (5) for ejecting the load of spent coffee (30), said piston (5) sliding inside the infusion cylinder (2) in the direction of the axis of the infusion cylinder (2) between a retracted position and an extended position for ejection of the load of spent coffee (30), and operating means for the ejection piston (5), comprising an oscillating rocker (32) having a first arm (33) provided with a member for driving the ejection piston (5) and a second arm (35) provided with a member for engaging the oscillating movement of the rocker (32) selectively from a first control cam (37) configured and arranged in such a manner as to generate an oscillation of the rocker (32) in the direction corresponding to the driving towards the extended position of the ejection piston (5), or with a second control cam (38) configured and arranged in such a manner as to generate an oscillation of the rocker (32) in the direction corresponding to the driving towards the retracted position of the ejection piston (5). |
