Multiple use computerized injector

A computer-controlled injector for use with a medicament cartridge and including a housing having a medicament cartridge receiving volume and a medicament cartridge insertion and removal opening communicating with the medicament cartridge receiving volume; a pivot mount element mounted onto the housing for selectably enabling access to the medicament cartridge receiving volume via the opening; a mechanical latch selectably locking the pivot mount element in a closed operative orientation; and an injection drive mechanism including a computer-controlled motor for driving a piston, forming part of the medicament cartridge, for injecting a medicament, the computer-controlled motor also being operative for operating the mechanical latch.