Subassembly of drug delivery device and drug delivery device

Abstract

A subassembly of a drug delivery device comprising a biased plunger rod; a body disposed on the plunger rod; and a coupling movable relative to the body; wherein the body includes a first locking element, The coupling includes a second locking element, and wherein the first locking element and the second locking element are configured to releasably engage each other to prevent movement of the coupling (84) relative to the body.

Description

technical field [0001] The present invention relates generally to a subassembly of a drug delivery device, and more particularly to a subassembly including a transport lock mechanism. Background technique [0002] Figure 1 shows a conventional medicament delivery device 1 as disclosed in WO2011 / 123024A1, which is hereby incorporated by reference into the present invention. A conventional drug delivery device 1 generally comprises a second subassembly 2 , an inner subassembly 3 and a first subassembly 4 . The internal subassembly 3 may include a medicament container 31 and a piston 32 slidably received in the medicament container 31 . The first subassembly 4 may include a plunger rod 41 , a tubular extension 42 slidably receiving the plunger rod 41 , a spring housed between the plunger rod 41 and the extension 42 , and an operative arrangement on the extension 42 . piece 44. [0003] When the conventional drug delivery device 1 is in an initial state, the operating member ...

AI Technical Summary

Problems solved by technology

This rotation of the operating member 44 can cause the extension 42 to release the plunger rod 41 prematurely.

[0005] Furthermore, in the final assembly of conventional devices, the connection between the second subassembly 2 and the first subassembly 4 may not be secure

Therefore, the two subassemblies 2 and 4 may accidentally separate from each other

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