US 2004/0194897 A1 · Friction transmission mechanism for a motor-driven blind

Abstract

A friction transmission mechanism for a motor-driven blind is constructed to include a driving unit, and at least one cord roll-up unit controlled to the driving unit to lift/lower or tilt the slats of the motor-driven Venetian blind. Each cord roll-up unit includes an amplitude modulation wheel controlled by the driving unit to lift/lower the slats and bottom rail of the Venetian blind, a frequency modulation wheel for rotation with the amplitude modulation set to tilt the slats of the Venetian blind, spring means, which forces the frequency modulation wheel into friction-engagement with the amplitude modulation wheel, and a support supporting the amplitude modulation wheel, the support having a shoulder adapted to act with a protruding block of the frequency modulation wheel and to further limit angle of rotation of the frequency modulation wheel.

Claims10

Dependent claims

An electromagnetic clutch-controlled electric blind comprising:

a blind body, said blind body having a headrail and a slat set, said headrail having an internal holding chamber, said slat set having a plurality of slats;
a power drive, said power drive having a reversible motor, and at least one electromagnetic clutch controlled between a first position coupled to said motor and a second position disconnected from said motor;
an amplitude modulation set, said amplitude modulation set having a spindle coupled to said motor for rotation with said motor to lift/lower said slats to the desired elevation;
a frequency modulation set, said frequency modulation set having a spindle coupled to said motor through said electromagnetic clutch so as to control a tilting angle of said slats.

1 more element

Dependencies are inferred from the claim text.

Facts

Application

10/828,227Filed 21 Apr 2004

Priority

JP 912026817 Mar 2002

Published

7 Oct 2004

Term ends

Not estimatedThe source records don’t support an estimate.

Classification6 codes

E06B 9/304
With ladder-tape: with tilting bar and separate raising shaft
E06B 9/322
Operating, guiding, or securing devices therefor: details of operating devices, e.g. pulleys, brakes, spring drums, drives
E06B 2009/3225
Details of operating devices, e.g. pulleys, brakes, spring drums, drives: arrangements to aid the winding of cords rollers
Y10S 160/17
Flexible or portable closure, partition, or panel: venetian blinds, motor driven

Family

Application10/143,770Continuation · filed 14 May 2002

Application10/828,227Continuation · filed 21 Apr 2004

US 2003/0168185 A1Published application

US 6,789,597 B2Related patent

US 7,040,374 B2Related patent

US 2004/0194897 A1This patent

From the US filing history. Foreign family members aren’t listed.

Friction transmission mechanism for a motor-driven blind

Life of this patent

Friction transmission mechanism for a motor-driven blind

Life of this patent

Abstract

Claims10