The utility model discloses an anti-falling combined instrument hairspring which comprises a hairspring
chassis, a combined mounting sleeve is connected to the center of the top of the hairspring
chassis in a penetrating mode, a hairspring inner
pile is arranged on the combined mounting sleeve in a sliding and sleeving mode, a hairspring body is arranged on the outer wall of the hairspring inner
pile, and an anti-falling mechanism is arranged on the hairspring
chassis. The anti-disengaging mechanism comprises a connecting sleeve arranged above the
balance spring inner
pile, the bottom of the connecting sleeve is fixedly connected with a connecting column, the connecting column penetrates through the combined installation sleeve in a sliding mode, and four limiting grooves are formed in the top of the
balance spring base plate. According to the anti-falling combined instrument hairspring, the periphery and the top of the hairspring body can be supported and limited through the arranged anti-falling mechanism, so that an all-around anti-falling effect can be provided for the hairspring body, use is more stable, meanwhile, the disassembly and
assembly mode is easy, and follow-up overhaul and maintenance are facilitated.