Winding device for a window blind

Abstract

A winding device includes a seat unit, a gear wheel unit, and a winding rod unit. The seat unit includes a tube seat that has an open end and that defines an accommodating space, and a front cover that covers the open end of the tube seat. The tube seat has a side wall, a tube wall, and a sleeving axle extending horizontally from the side wall and spaced apart from the tube wall. The gear wheel unit includes a vertical gear wheel component having a vertical wheel portion and a vertical axle portion, and a horizontal gear wheel component having a horizontal wheel portion and a sleeving tube portion. A top portion of the winding rod unit is connected to the vertical axle portion. The winding rod unit may be manipulated to rotate the vertical gear wheel component, such that the horizontal gear wheel component is driven to rotate.

1 . A winding device for a window blind, comprising:
 a seat unit including a tube seat that has an open end and defines an accommodating space, and a front cover that covers said open end of said tube seat, said tube seat having a side wall, a tube wall that extends horizontally from a periphery of said side wall, and a sleeving axle that extends horizontally from said side wall and that is spaced apart from said tube wall;   a gear wheel unit including
 a vertical gear wheel component having a vertical wheel portion rotatable about a vertical axis of said vertical gear wheel component and that is disposed in said accommodating space, and a vertical axle portion that extends downwardly through said tube seat from a center portion of said vertical wheel portion, said vertical wheel portion including a plurality of first gears, and 
 a horizontal gear wheel component sleeved on said sleeving axle, and having a horizontal wheel portion driven by said vertical wheel portion so as to rotate about a horizontal axis of said horizontal gear wheel component, and a sleeving tube portion that extends through said front cover from said horizontal wheel portion and rotates about the horizontal axis with said horizontal wheel portion, said horizontal wheel portion including a plurality of second gears meshed with said first gears of said vertical wheel portion; and 
   a winding rod unit a top portion of which is connected to said vertical axle portion of said vertical gear wheel component and which may be manipulated to rotate said vertical gearwheel component, such that said horizontal gear wheel component is driven to rotate.   
     
     
         2 . The winding device as claimed in  claim 1 , wherein said winding rod unit includes a hook that is connected to a bottom end of said vertical axle portion of said gearwheel unit, and a rotating rod that is hooked onto a bottom end of said hook and that is able to be manipulated to rotate about a longitudinal axis thereof. 
     
     
         3 . The winding device as claimed in  claim 2 , wherein said gear wheel unit further includes a sleeving tube sleeved on said vertical axle portion, said bottom end of said vertical axle portion being formed with a long slot into which said hook of said winding rod unit is inserted, said sleeving tube being sleeved on said bottom end of said vertical axle portion over said long slot such that said hook is secured in said long slot. 
     
     
         4 . The winding device as claimed in  claim 2 , wherein said winding rod unit further includes an angling rod a top end of which is pivotally connected to a bottom end of said rotating rod, and a holding rod a top end of which is pivotally connected to a bottom end of said rod. 
     
     
         5 . The winding device as claimed in  claim 4 , wherein said winding rod unit further includes a sliding tube that is sleeved loosely on said rotating rod. 
     
     
         6 . The winding device as claimed in  claim 1 , wherein said gear wheel unit further includes a connecting tube that is sleeved on said sleeving tube portion of said horizontal gear wheel component and that is adapted to be connected to a roller of the window blind. 
     
     
         7 . The winding device as claimed in  claim 6 , wherein an end portion of said sleeving axle of said seat unit has at least two pinching arms that are vertically spaced apart from each other, an outer surface of each pinching arm being formed with a depression to thereby form a pair of horizontally opposing shoulders on said outer surface of said pinching arm, said connecting tube being formed with a ring protrusion protruding radially inwardly from an inner surface of said connecting tube and received in said depressions to thereby abut against said shoulders of each of said pinching arms. 
     
     
         8 . The winding device as claimed in  claim 7 , wherein said outer surface of an extreme end of each of said pinching arms is slanted to thereby form a slanted surface. 
     
     
         9 . The winding device as claimed in  claim 1 , wherein said gear wheel unit further includes a sliding ring that is sleeved on said sleeving axle of said seat unit and that is interposed between said sleeving axle and said sleeving tube portion of said horizontal gearwheel component. 
     
     
         10 . The winding device as claimed in  claim 1 , wherein said vertical wheel portion of said vertical gear wheel component and said horizontal wheel portion of said horizontal gear wheel component are bevel gears.