| 摘要 |
A disposable injection device has a dispensing chamber housing and a plunger. The dispensing chamber housing has an inner surface and an outer surface. The inner surface partially defines a dispensing chamber for receiving a quantity of a substance. The plunger is engaged with the inner surface of the dispensing chamber housing, is capable of sliding in the dispensing chamber housing, and is fluidly sealed to the inner surface of the dispensing chamber housing. The plunger has a plunger interface. The plunger interface mates with a mating surface on a mechanical linkage interface such that force is transferred from the mechanical linkage interface to the plunger along a first direction towards the plunger when the plunger interface is in contact with the mating surface of the mechanical linkage interface, and force is not substantially transferred from the mechanical linkage interface to the plunger along a second direction away from the plunger. |
