Patent ID: 8139367

Claim:
A spring mechanism supported by a housing, comprising: a first segment having a first terminal end and a first coupling end; a second segment having a second terminal end and a second coupling end; wherein the first coupling end and the second coupling end are coupled by a torsion spring having a predetermined spring constant and capable of exerting a force; wherein: the first terminal end and the second terminal end are configured to be adjacent when the force of the torsion spring is unreleased; and the first terminal end and the second terminal end are configured to be separated when the force of the torsion spring is released; and an electrically conducting flexible printed circuit having a circuit length at least partially supported by and bonded to an outer portion of both the first segment and the second segment and the flexible printed circuit freely traverses a radius portion of the torsion spring length being unbonded, configured to provide adequate movement of the flexible printed circuit about the torsion spring length, the housing further comprises a first housing section and a second housing section such that the first housing section telescopically slides within the second housing section with the spring mechanism being placed between the first housing section and the second housing section.