Automatic injection device having a magnetic drive system

A method of assembling an automatic injection device, comprising:

• positioning an inner magnet in a drug container which contains a pharmaceutical product, the drug container including a stopper;
• inserting the drug container in a through-hole of an outer magnet such that the inner magnet is aligned with the through-hole,
• inserting the outer magnet in a through-hole of an outer collar;
• and
• connecting the outer collar to two shafts of a driving element of the automatic injection device via at least two connectors,
• wherein the outer magnet is linearly movable on an outside of the drug container by the driving element in order to move the inner magnet inside the drug container.

A method of assembling an automatic injection device, comprising:

• positioning an inner magnet in a drug container which contains a pharmaceutical product, the drug container including a stopper;
• inserting the drug container in a through-hole of an outer magnet such that the inner magnet is aligned with the through-hole,
• inserting the outer magnet in a through-hole of an outer collar;
• and
• connecting the outer collar to two shafts of a driving element of the automatic injection device by integrated threads,
• wherein the outer magnet is linearly movable on an outside of the drug container by the driving element in order to move the inner magnet inside the drug container.