The present invention relates to a locking assembly for locking a mixer to a dispensing cartridge, and to a dispensing cartridge particularly for dental impression materials. The locking assembly (200) comprises a first movable member (210) and a second movable member (230) that are operationally connected with each other such that a movement of the first movable member in a first direction causes the second movable member to release a tip (130) from the dispensing cartridge, and a movement of the first movable member in a second direction causes the second movable member to engage the tip. Preferably, said first movable member, in its non-activated position, forms at least a part of a handle. <；IMAGE>；
