Injection device, in particular autoinjector, for the simultaneous administration of several medications

摘要

The invention relates to an injection device (1) for the simultaneous administration of several medications. The injection device (1) comprises a carrying housing (5), an activation sleeve (8) surrounding the carrying housing (5), at least two carpules (9,11), a first drive module (13) for the administration of the medications, a securing device (14), a needle arrangement (17), a needle protection element (20), and a second triggerable drive module (21) for the needle arrangement (17). The carpules (9, 11) are arranged next to another. The first drive module (13) comprises a drive element (22) with a number of piston rods (23, 24) equal to the number of carpules (9, 11), which form a composite structural unit. At least one of the piston rods (23, 24) is configured in the form of a hollow cylinder and is formed as closed on the piston side, wherein arranged inside this is a first drive means (26) of the first drive module (13).