Coffee-maker comprising an improved locking device

Coffee-maker able to function with cartridges, comprising a case (1) for reception of means for supplying hot water to an infusion head (8) in two parts:

• a fixed part forming a support for at least one cartridge (2) and a movable part to open and close said infusion head (8), the two parts being maintained spaced apart by first elastic restoring means (14), a locking device (24) to maintain the infusion head (8) closed in opposition to said restoring means and means for adjusting the infusion parameters adapted to emit at least one signal representative of the operating condition of the machine, characterized in that, in operation, the locking device is blocked in a manner to prevent opening of the movable part of the infusion head and that it has means for controlling the opening of said locking device at the end of a signal emitted by said adjusting means.