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Device for preparation of a drink from a food substance contained in a capsule (6) comprising a fluid supply unit (5) comprising fluid supply means (50); a capsule holder (4) configured to receive a capsule (6). The capsule holder is removable from the fluid supply unit and can comprise a fluid inje

Device for preparation of a drink from a food substance contained in a capsule (6) comprising a fluid supply unit (5) comprising fluid supply means (50); a capsule holder (4) configured to receive a capsule (6). The capsule holder is removable from the fluid supply unit and can comprise a fluid injector (70) for inserting fluid into the capsule.

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What is claimed is: 1. A device for preparation of a drink from a food substance contained in a capsule comprising: a fluid supply unit comprising a fluid supply, a supply base, a fluid outlet and a closing mechanism; a capsule holder removably associated with the fluid supply unit and comprising a

What is claimed is: 1. A device for preparation of a drink from a food substance contained in a capsule comprising: a fluid supply unit comprising a fluid supply, a supply base, a fluid outlet and a closing mechanism; a capsule holder removably associated with the fluid supply unit and comprising a housing to receive a capsule; and complementary engaging members of the fluid supply unit and capsule holder comprising one or more guiding members for enabling insertion of the capsule holder into the fluid supply unit along a first direction of insertion in which the capsule holder is prepositioned in the fluid supply unit in a reference position in which the fluid supply is relatively distant from the capsule holder; wherein the closing mechanism is configured to bring the supply base relatively closer to the capsule holder by effect of a force carried out on the capsule holder in a manner such that the supply base becomes positioned in a fluid distribution position for distributing fluid into the capsule. 2. The device according to claim 1, wherein the closing mechanism of the fluid supply unit is configured to bring the supply base relatively closer to the capsule holder in the fluid distributing position by the effect of a force that is directed downwardly. 3. The device according to claim 1, wherein the complementary members of engagement of the capsule holder and fluid supply unit comprise a complementary set of guiding edges and guiding ribs enabling the insertion of the capsule holder by sliding it into the fluid supply unit. 4. The device according to claim 3, wherein the fluid supply unit comprises a guide base into which the capsule holder is inserted by sliding movement along the guiding edges; wherein the supply base is articulated to and mobile relative to the guide base from the distant position to the fluid distribution position of the fluid supply in the capsule. 5. The device according to claim 4, wherein the supply base is articulated to the guide base by a toggle joint system so that pressure on the capsule holder in a preferred direction distinct from the insertion direction causes the supply base to close relative to the guide base in the fluid distribution position. 6. The device according to claim 5, wherein the toggle joint system comprises two wings mounted on two side articulation shafts of the guide base with the wings being also mounted by two articulations on the supply base through two arced oblong guide openings made in the wings; thereby the guide base is pivotable relative to the wings about the shafts when the capsule holder is brought manually downwards and brings the supply base downwards which then closes on the guide base. 7. The device according to claim 1, wherein the capsule holder comprises a fluid injector for inserting fluid within the capsule. 8. The device according to claim 7, wherein the injector comprises a fluid inlet orifice, an injection duct and at least one injection orifice for injecting at least one pressurized jet of fluid into the capsule, wherein the injector comprises a nozzle which perforates, cuts away or inserts itself through a wall of the capsule. 9. The device according to claim 8, wherein the injector comprises a sealing element located at the base of the nozzle or of the connector and made of an elastic material to provide a seal between the nozzle or connector and the wall of the capsule or contribute to provide sealing effect at the surface of the capsule. 10. The device according to claim 9, wherein the sealing member includes a rigid stepped portion around the base of that part of the injector that inserts itself into the capsule, with the portion being effective to provide an impression on the surface of the capsule. 11. The device according to claim 1, wherein the fluid injector is part of the fluid supply unit. 12. A capsule holder for removable connection to a fluid supply unit of a drink preparation device to prepare a drink from a food substance contained in a capsule by inserting a fluid into the capsule, the capsule holder comprising: a holding mechanism to hold the capsule, and an injection device comprising an injector for connection to the fluid supply unit and configured for transferring fluid from the supply unit into the capsule in the form of at least one jet of fluid, wherein the injector comprises a fluid inlet orifice, an injection duct and at least one injection orifice for injecting at least one pressurized jet of fluid into the capsule. 13. The capsule holder according to claim 12, wherein the fluid supply unit includes a fluid supply duct and the injector comprises a connection portion forming at least one seal bearing surface intended to come to bear against the fluid supply duct, with the seal bearing surface occupying a limited surface area directly above the housing but that is smaller than the surface area of the housing. 14. The capsule holder according to claim 13, wherein the seal bearing surface surrounds a fluid inlet orifice and both the seal bearing surface and the fluid inlet orifice are placed substantially off-centered above the housing. 15. The capsule holder according to claim 13, wherein the seal bearing surface has an external diameter of less than 2 cm and the orifice has a diameter of less than 3 mm, and the at least one bearing surface is frustoconical. 16. The capsule holder according to claim 12, wherein the injector comprises either a nozzle which perforates, cuts away or inserts itself through a wall of the capsule or a connector which is arranged against an orifice of a wall of the capsule in order to send fluid through the orifice under pressure into the capsule. 17. The capsule holder according to claim 16, wherein the injector comprises a sealing element of an elastic material to provide a seal between the nozzle or connector and the wall of the capsule. 18. The capsule holder according to claim 17, wherein the sealing element includes a rigid stepped portion around the base of the part of the injector that inserts itself in the capsule, with the portion being effective to provide an impression on the surface of the capsule. 19. The capsule holder according to claim 12, wherein the injector comprises an injection wall or cover entirely covering the cup and the wall or cover is furnished with a fluid delivery manifold having a multitude of injection orifices and being operatively associated with a central needle furnished in the wall or cover which delivers fluid to the orifices. 20. The capsule holder according to claim 12, wherein the injector is associated with a fluid duct and a mechanism for blocking the duct. 21. The capsule holder according to claim 20, wherein the blocking mechanism is a valve. 22. The capsule holder according to claim 20, wherein the blocking mechanism is a portion of duct of smaller cross section that causes retention of liquid in the duct by capillary attraction. 23. The capsule holder according to claim 20, wherein the injection duct has a rectilinear axis and is oriented vertically toward the bottom of the cup. 24. The capsule holder according to claim 12, which further comprises a guidance mechanism in the form of lateral ribs for the insertion of the capsule holder into the fluid supply unit. 25. A combination comprising a capsule holder according to claim 12 and a capsule containing a food substance for the preparation of a drink with the capsule comprising walls defining an external volume matching the housing of the capsule holder and a lateral edge with dimensions suitable for bearing against a bearing rim of the capsule holder. 26. A device for preparation of different drinks from food substances contained in capsules by injection of a fluid under pressure into the capsules, comprising a fluid supply unit and a fluid injector, the device comprising a series of capsule holders which are interchangeable and removable with respect to the fluid supply unit, with each capsule holder comprising specific features that distinguish each other capsule holder chosen amongst the shape, size, fluid injection arrangement and combinations thereof.