Blind lifting control method and mechanism
AssigneeNien Made Enterprise Co., Ltd.
InventorMing Nien
Life of this patent
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Abstract
A blind lifting control mechanism for use in a blind and adapted to control the elevation of the blind body is constructed to include two bobbins pivotally mounted inside a headrail of the blind, a transmission mechanism mounted inside the headrail of the blind and coupled to the bobbins, and a control rod vertically suspended at a side of a window and coupled to the transmission mechanism for rotating by the user to drive the transmission mechanism to rotate the bobbins to roll up/let off the lift cords of the blind body and to further lift/lower the blind body.
Claims13
A blind lifting control mechanism installed in a blind that includes a headrail mounted at a top side of a window and a blind body mounted under said headrail, said blind lifting control mechanism comprising:
- at least one bobbin rotatably fastened to said headrail of said blind for synchronous rotation to lift or lower the blind body of said blind;
- a transmission mechanism mounted inside said headrail of said blind and adapted to rotate said bobbin, said transmission mechanism having a rotating force input end disposed in an end of the headrail, a rotating force output end connected to said bobbin, and means for stopping reverse transmission of force from said force output end toward said force input end;
- and
- a control rod vertically suspended at a lateral side of the window and pivoted to the force input end of said transmission mechanism and adapted to rotate the force input end of said transmission mechanism by the user and to further drive said transmission mechanism to rotate said bobbin.
A blind lifting control method of controlling the rotation of bobbins in a headrail of a blind to roll up or let off lift cords of said blind to further lift or lower the blind body of said blind by rotating a control rod to further drive a transmission mechanism in said headrail of said blind to rotate said bobbins and enabling said transmission mechanism to prohibit transmission of a rotary driving force in direction from said bobbin toward said control rod after stoppage of the rotation of said control rod is stopped.
Dependencies are inferred from the claim text.