| 主权项 |
1. A dispensing assembly for a machine for the preparation of beverages using capsules that have a body that houses a dose of at least one substance that is able to form a liquid product using a fluid, the dispensing assembly having:
an infusion chamber that comprises a first part and a second part, at least the first part defining a housing configured for receiving at least partially one said capsule; an actuation linkage, operable to cause relative movements between the first part and the second part of the infusion chamber, between a spaced position and a close position; ejector means, which are associated to the first part and capable to push the capsule towards the outside of the housing when the first part and the second part are brought towards their spaced position, wherein one of the first part and the second part is configured for introduction of the fluid into the capsule and the other of the first part and the second part is configured for dispensing the liquid product from the infusion chamber, and wherein the ejector means comprise an ejector member which is movable with respect to a bottom of the first part in such a way that:
in the passage from said spaced position to said close position, the ejector member assumes a position with respect to the bottom of the first part such as not to interfere with the insertion of a capsule into the housing; andin the passage from said close position to said spaced position, the ejector member assumes a position with respect to the bottom of the first part such as to cause ejection of the capsule from the housing, wherein the ejector member is constrained to a movable element of the actuation linkage by means of a mechanical connection pre-arranged for controlling displacement of the ejector member both in the passage from said spaced position to said close position and in the passage from said close position to said spaced position, wherein the mechanical connection comprises:
at least one cam member, connected in rotation to a shaft of the actuation linkage that is rotatable about to an axis perpendicular to a direction of displacement of the first part with respect to the second part;at least one cam follower associated to the ejector member, wherein the cam member has at least one cam surface defined in a parametric way as a function of a programmed displacement of the ejector member, and wherein the cam member has at least two said cam surfaces and the cam follower is configured to co-operate with one of said cam surfaces in the course of displacement from said spaced position to said close position and to co-operate with the other of said cam surfaces in the course of displacement from said close position to said spaced position. |
