Roller shade system and method

摘要

An apparatus for raising and lowering a window shade having: a clutch assembly with a clutch core having a shaft; springs having pairs of load bearing members, the springs being circumferentially positioned along a length of the shaft, the pairs of load bearing members being circumferentially spaced around the shaft such that there are no two orthogonal planes along a longitudinal axis of the shaft about which a load applied to a load bearing member of each pair is symmetrically distributed; a pulley defining openings, each of the openings being configured to receive at least one pair of load bearing members; and a housing comprising a plurality of keys, each key being configured to fit between at least one pair of load bearing members received by the openings.

主权项

1. An apparatus for raising and lowering a window shade comprising:
a clutch assembly further comprising:
a clutch core having a shaft;a pulley; a clutch bracket comprising a plurality of mounting holes configured at an angle relative to each other; wherein the clutch core has an outward facing side opposite the shaft comprising at least two hooks at an angle relative to each other configured to fit in the mounting holes, each of the hooks comprising an undercut portion configured to hold the clutch core in the bracket after insertion of the hooks in the mounting holes; wherein the clutch core further comprises a bridge; the clutch bracket further comprises: at least one mounting slot configured to receive the bridge; and a rotatable arm; and wherein the arm is configured to fit in the bridge after the bridge has been received in the mounting slot to lock the clutch core to the clutch bracket.