| 摘要 |
The present invention relates to a medicament delivery device it is characterised by medicament delivery device comprising a generally tubular housing having opposite proximal and distal ends, wherein the housing is provided with a coaxial tubular sleeve extending from its distal end towards the proximal end;a generally tubular medicament delivery member shield coaxially and slidably arranged within the housing, wherein a proximal portion of the tubular medicament delivery member shield protrudes from the proximal end of the housing; a medicament container provided with a medicament delivery member, a chamber containing a medicament, and an axial movable piston; drive means comprising a plunger rod having opposite proximal and distal ends, and a force spring means, wherein the proximal end of the plunger rod is in contact with the piston;wherein the device further comprises a medicament container holder coaxially arranged to the drive means and capable of supporting the medicament container; wherein the medicament container holder comprises a first locking means releasibly connected to corresponding locking means on the coaxial tubular sleeve forming a first locking engagement for holding the medicament container holder in an initial state against a force from the drive means, wherein the medicament delivery member shield is capable of releasing said first locking engagement when the medicament delivery member shield is pressed against a medicament delivery site, whereby said drive means forces said medicament container holder a certain predetermined distance towards the proximal end of the device; and a second locking means surrounded by the coaxial tubular sleeve and releasibly connected to corresponding locking means on the plunger rod forming a second locking engagement for preventing the piston to be affected by the force from the drive means until said medicament container holder has moved the certain predetermined distance. |
