Length compensation for a setting mechanism of an injection device

A dose setting mechanism with at least one setting mechanism comprising a first element and at least one other element is mounted to be displaceable relative to the first element, the first element having at least two mutually offset threads so that at least one thread element of the at least one other element is guided in only one of the at least two mutually offset threads, wherein the at least two mutually offset threads are in the form of circumferentially extending grooves or groove portions and the at least one thread element of the at least one other element is in the form of a circumferentially extending web or web portion, and wherein a web of a thread of the at least one other element engages with one of the grooves of the first element so that a predefined positional relationship is achieved between the first element and the other element.

A method of manufacturing a setting mechanism for an injection device, whereby a thread of at least one dose setting element is inserted in one co-operating thread of at least two threads of another dose setting element so that a predefined positional relationship is obtained between the dose setting element and the other dose setting element.

A dose setting mechanism for an injection device, the dose setting mechanism comprising a setting element, an approximately cylindrical rotating sleeve connected to the setting element and an external thread and an internal thread which has the same pitch as or different pitch from the external thread, wherein one thread of the rotating sleeve engages with a thread associated with one of the injection device or a component thereof, and the other thread engages with a thread of a forward feed element so that a setting movement of the setting element is transmitted by the rotating sleeve via the two thread engagements to produce a dose setting movement of the forward feed element, and wherein at least one of the external thread and the internal thread comprises at least two different grooves extending circumferentially around the rotating sleeve.

An injection device in which a substance to be dispensed is contained or in which an ampoule containing a substance to be dispensed can be inserted, the injection device comprising a setting mechanism comprising a first element and at least one other element displaceable relative to the first element, said first element having at least two mutually offset threads and said at least one other element having at least one thread element, whereby said at least one thread element of the at least one other element is guided in only one of said at least two mutually offset threads of the first element.