DRIVE MECHANISM FOR INJECTION DEVICE, AND INJECTION DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a portable driving mechanism for an injection device and an injection device, miniaturized to be simply housed in a pocket of a jacket or a handbag.

SOLUTION: In this driving mechanism, a piston 48 is successively moved along the first axis to drive a bung 20 into a medicament cartridge 18. A shifting mechanism includes: a dose setting spindle 30 disposed along a second axis extending in parallel with the first axis; a transfer device coupled between dose setting spindle 30 and piston 20; and a shifting means for shifting the dose setting spindle 30 relative to the medicament cartridge 18. Movement of the shifting means in the first direction causes movement of the dose setting spindle 30 and the piston 20 in the first direction.

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