Patent ID: 9388614
Filing Date: 2016-07-12
CPC Classification: E05D,G06F,Y10T

Claim Text:
1. A parallelism fixing device applied to a dual-shaft system, comprising: first and second rotary shafts, each shaft having a fixed section mounted on an electronic apparatus, a pivoted section assembled with a torque module, and a middle section positioned between the fixed section and the pivoted section, at least one spiral groove formed on a surface of each of said first and second shafts; a fixing unit extending in a longitudinal direction defining a casing structure with two open longitudinally opposed ends having a contour with a bulbous upper section defining a first chamber and a bulbous lower section defining a second chamber, said upper and lower sections connected by a narrowed intermediate section defining a subsidiary chamber, said first, second, and subsidiary chambers in open communication each with respect to the other, the first and second rotary shafts being assembled with the fixing unit, the middle sections of the first and second rotary shafts being respectively fixedly assembled in the first and second chambers, and a link unit being disposed between the middle sections of the first and second rotary shafts and longitudinally and slideably displaceable within said subsidiary chamber, said link unit having at least one planar engaging surface for engaging an inner planar wall of the subsidiary chamber, said link unit further having a pair of boss members protruding from ends thereof and insertably received within the spiral grooves of said first and second rotary shafts for synchronously rotating said first and second rotary shafts.