Patent ID: 10357612

Abstract:
The present invention relates to a drive mechanism (10; 177) for a medicament delivery device, which drive mechanism (10; 177) comprises an elongated plunger rod (12; 176), wherein the plunger rod comprises a number of discrete segments (14; 178), interlocking elements (18, 20, 32, 34, 60, 62; 182, 184, 196, 198, 212, 214) arranged between adjacent segments operably arranged to releasably locking adjacent segments, drive force elements (30, 50 71; 194, 210, 230) operably arranged to act between adjacent segments, and release elements (46, 68; 208, 228) operably arranged to act on said interlocking elements (18, 20, 32, 34, 60, 62; 182, 184, 196, 198, 212, 214) such that said segments (14; 178) are released in sequence.