SPIRAL SPRING ASSEMBLY

摘要

A spiral spring assembly capable of restricting a lateral force generated at the center shaft. The spiral spring assembly (1) comprises a center shaft (2), a spiral spring (3) disposed around the center shaft (2) and having an outer end (3a), an inner end (3b) and a spiral unit (3c) spirally connecting the outer end (3a) with the inner end (3b), an inner end fixing member (4) to which the inner end (3b) is fixed so as to be able to transmit torque, and an outer end fixing member (5) fixed to the outer end (3a) and movable with respect to the inner end fixing member (4) within a specified section from a first state to a second state. The outer end (3a) is fixed to the outer end fixing member (5) so as to be able to transmit torque and restrict a lateral force generated at the center shaft (2) in a specified state within a specified section.