Spring, power spring, hair spring, driving mechanism utilizing them, and timepiece
AssigneeSeiko Epson Corporation
InventorsMasatoshi Moteki, Fumio Takagi, Tatsuo Hara
Life of this patent
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Abstract
A mainspring used as a power source for a driving mechanism is made of an amorphous metal sheet, and has an S-shaped free-exploded shape. The curvature changing point where the curving direction of the free-exploded shape changes is formed on the inner end side of a middle point between the inner end on the winding side and the outer end serving as the other end of the inner end. Because of the high tensile stress and a low Young's modulus, the amorphous metal permits increase in mechanical energy stored in the mainspring.
Claims55
A spring for mounting on a substrate receiving at least a portion of the spring, said spring being formed of spirally arranged amorphous metal lying in a plane and shaped so that when the spring is mounted on the substrate the spring has an initial flexure imparted thereto, and serving as an energy storage device.
A mainspring for mounting on a substrate receiving at least a portion of the mainspring, said mainspring being formed of spirally arranged amorphous metal lying in a plane and shaped so that when the mainspring is mounted on the substrate the mainspring has an initial flexure imparted thereto.
A hairspring for mounting on a substrate receiving at least a portion of the hairspring, said hairspring being formed of spirally arranged amorphous metal lying in a plane and shaped so that when the hair is mounted on the substrate the spring has an initial flexure imparted thereto.
A mainspring for driving a precision machine, which spring can be mounted on a substrate receiving at least a portion of the mainspring, the mainspring comprising a plurality of spirally arranged laminated amorphous metal sheets, together having an S-shaped free exploded shape lying in a plane so that when the mainspring is mounted on the substrate the mainspring has an initial flexure imparted thereto.
Dependencies are inferred from the claim text.