| 主权项 |
1. A needle assembly system comprising:
a medicament delivery device; and a needle assembly mountable on a distal portion of the medicament delivery device, the needle assembly comprising:
a needle;a needle hub adapted to carry the needle, wherein the needle hub includes:
a proximal portion adapted to engage the medicament delivery device; anda cover portion adapted to abut a distal surface of the medicament delivery device, wherein the proximal portion of the needle hub includes a second thread adapted to engage a first thread of the medicament delivery device, wherein the second thread is offset from the cover portion by a first distance, the first thread extends along the distal portion of the medicament delivery device for a second distance, and the first distance is substantially equivalent to the second distance, wherein the distal portion of the medicament delivery device comprises (i) an unthreaded region extending proximally from the first thread or (ii) a threaded region extending proximally from the first thread and having a third thread with a depth less than a depth of the first thread, and wherein the first thread is configured to be threadedly disengaged from the needle assembly and the second thread is configured to be positioned over the unthreaded region or the threaded region of the distal portion of the medicament delivery device when the needle assembly is mounted on the medicament delivery device. |
