Drug delivery device

A drug delivery device may include a housing defining a longitudinal axis and having an opening and a drug storage container including a barrel, a stopper movably positioned within the barrel, and a delivery member positioned at a distal end of the barrel and having an insertion end, the insertion end is configured to at least partially extend through the opening during the delivery state. The device may also include a plunger movable toward the distal end of the drug storage container to engage the stopper and expel the drug from the drug storage container through the delivery member, the plunger including a body portion and a shock absorbing portion. The device may also include a plunger biasing member coupled with the plunger and configured to advance the plunger toward the distal end of the drug storage container. 一种药物递送装置可以包括壳体，该壳体限定纵向轴线并且具有开口和药物储存容器，该药物储存容器包括筒体、塞子和递送构件，该塞子可移动地定位在筒体内，并且该递送构件定位在筒体的远侧端部处并且具有插入端，该插入端被配置成在递送状态期间至少部分地延伸穿过开口。该装置还可以包括柱塞，该柱塞可朝向药物储存容器的远侧端部移动，以接合塞子并将药物从药物储存容器通过递送构件排出，该柱塞包括本体部分和减震部