Light blocking element for a covering for an architectural opening

1. A covering for an architectural opening, comprising:

an elongated first rail;

a movable rail movable towards and away from said first rail;

an extendable covering secured to said movable rail, said extendable covering extending and retracting as said movable rail moves towards and away from said first rail;

a light blocking element movably coupled to one of said first rail or said movable rail such that said light blocking element remains engaged with said one of said first rail or said movable rail as said movable rail moves towards and away from said first rail;

a first magnetic member coupled to said light blocking element; and

a second magnetic member coupled to the other of said first rail or said movable rail;

wherein:

when said movable rail moves to a position closest to said first rail, said first and second magnetic members magnetically couple to each other; and

said light blocking element is configured to float relative to said one of said first rail or said movable rail.

2. The covering as in claim 1 , wherein said first magnetic member comprises one of a strip of ferromagnetic material or a magnet and second magnetic member comprises the other of said one of said strip of ferromagnetic material or said magnet.

3. The covering as in claim 1 , wherein said first and second magnetic members comprise magnets.

4. The covering as in claim 1 , wherein:

said light blocking element is movably coupled to said first rail; and

said second magnetic member is coupled to said movable rail.

5. The covering as in claim 4 , wherein:

said movable rail is vertically supported relative to said first rail at first and second locations and defines an unsupported span between said first and second locations; and

said second magnetic member is coupled to said movable rail at a location along said unsupported span.

6. The covering as in claim 5 , wherein said location along said unsupported span corresponds to a central location of said unsupported span defined between said first and second locations.

7. The covering as in claim 4 , wherein:

said second magnetic member is coupled to an upper surface of said movable rail;

said first magnetic member is received within a slot defined by said light blocking element; and

said slot faces said upper surface of said movable rail.

8. The covering as in claim 1 , further comprising a peg extending outwardly from one of said light blocking element or said other of said first rail or said movable rail;

wherein:

an opening is defined in the other of said one of said light blocking element or said other of said first rail or said movable rail;

said opening configured to receive said peg when said movable rail moves to said position closest to said first rail.

9. The covering as in claim 8 , wherein:

said peg extends outwardly from said light blocking element; and

said opening is defined in said movable rail.

10. The covering as in claim 8 , wherein said peg is received within said opening prior to said first and second magnetic members magnetically coupling to each other.

11. The covering as in claim 8 , wherein:

said opening corresponds to a first opening;

one of said first magnetic member or said second magnetic member defines a second opening configured to be aligned with said first opening; and

said peg is received within said first and second openings when said movable rail moves to said position closest to said first rail.

12. The covering as in claim 1 , wherein said light blocking element is movably coupled to said one of said first rail or said movable rail such that a portion of said light blocking element is received within a portion of said one of said first rail or said movable rail.

13. The covering as in claim 1 , wherein said light blocking element remains engaged with said one of said first rail or said movable rail when said first and second magnetic members are magnetically decoupled from each other.

14. A covering for an architectural opening, comprising:

a first rail;

a movable rail movable towards and away from said first rail;

a light blocking element movably coupled to said first rail such that said light blocking element remains engaged with said first rail as said movable rail moves towards and away from said first rail;

a first magnetic member coupled to said light blocking element; and

a second magnetic member coupled to said movable rail;

wherein, when said movable rail moves to a position closest to said first rail, said first and second magnetic members magnetically couple to each other.

15. The covering as in claim 14 , wherein said first magnetic member comprises one of a strip of ferromagnetic material or a magnet and second magnetic member comprises the other of said one of said strip of ferromagnetic material or said magnet.

16. The covering as in claim 14 , wherein said first and second magnetic members comprise magnets.

17. The covering as in claim 14 , wherein:

said movable rail is vertically supported relative to said first rail at first and second locations and defines an unsupported span between said first and second locations; and

said second magnetic member is coupled to said movable rail at a location along said unsupported span.

18. The covering as in claim 17 , wherein said location along said unsupported span corresponds to a central location of said unsupported span defined between said first and second locations.

19. The covering as in claim 14 , further comprising a peg extending outwardly from one of said light blocking element or said movable rail;

wherein:

an opening is defined in the other of said light blocking element or said movable rail;

said opening configured to receive said peg when said movable rail moves to said position closest to said first rail.

20. The covering as in claim 19 , wherein said peg is received within said opening prior to said first and second magnetic members magnetically coupling to each other.

21. The covering as in claim 19 , wherein:

said opening corresponds to a first opening;

one of said first magnetic member or said second magnetic member defines a second opening configured to be aligned with said first opening; and

said peg is received within said first and second openings when said movable rail moves to said position closest to said first rail.

22. The covering as in claim 14 , wherein said light blocking element is configured to float relative to said first rail.

23. The covering as in claim 14 , wherein said light blocking element is movably coupled to said first rail such that a portion of said light blocking element is received within a portion of said first rail.

24. The covering as in claim 14 , wherein said light blocking element remains engaged with said first rail when said first and second magnetic members are magnetically decoupled from each other.

25. A covering for an architectural opening, comprising:

a first rail;

a movable rail movable towards and away from said first rail;

a light blocking element movably coupled to said first rail;

a first magnetic member coupled to said light blocking element;

a second magnetic member coupled to said movable rail; and

a peg extending outwardly from one of said light blocking element or said movable rail;

wherein:

an opening is defined in the other of said light blocking element or said movable rail; and

when said movable rail moves to a position closest to said first rail, said first and second magnetic members magnetically couple to each other; and

said peg is configured to be received within said opening prior to said first and second magnetic members magnetically coupling to each other when said movable rail moves to said position closest to said first rail.

26. The covering as in claim 25 , wherein:

said opening corresponds to a first opening;

one of said first magnetic member or said second magnetic member defines a second opening configured to be aligned with said first opening; and

said peg is received within said first and second openings when said movable rail moves to said position closest to said first rail.