Play yard

1. A play yard comprising:

a first frame unit including

a plurality of spaced-apart upright rods,

a plurality of corner couplers that are provided respectively on said upright rods, and

a plurality of side rods, each interconnecting a pair of said corner couplers; and

a bassinet-supporting second frame unit including a plurality of connecting rods, each having

a supporting segment, and

a pair of bent end segments that are connected respectively to longitudinally opposite ends of said supporting segment, and that are connected movably and respectively to a pair of said corner couplers, such that each of said connecting rods is selectively positioned at a lower position and a higher position located above the lower position relative to said first frame unit,

wherein each of said corner couplers has a pair of spaced-apart positioning slots movably and respectively retaining two corresponding ones of said bent end segments of an adjacent pair of said connecting rods of said second frame unit.

2. The play yard as claimed in claim 1 , wherein said positioning slots in each of said corner couplers are substantially perpendicular to each other.

3. The play and as claimed in claim 2 , wherein:

each of said corner couplers further has a tap surface and a lateral surface that extends downwardly from a periphery of said top surface; and

each of said positioning slots in said corner couplers extends horizontally in said top surface, has an opening formed at said lateral surface and through which a corresponding one of said bent end segments rotatably extends, and is defined cooperatively by an internal side surface which extends downwardly from said top surface, and an internal bottom surface which is connected to a bottom end of said internal side surface, said internal side surface being formed with a limiting block protruding therefrom such that a groove width of a corresponding portion of said positioning slot is smaller than a diameter of the corresponding one of said bent end segments so as to confine the corresponding one of said bent end segments between said limiting block and said internal bottom surface.

4. The play yard as claimed in claim 3 , wherein:

each of said internal bottom surfaces of said corner couplers of said first frame unit is formed worth a positioning hole; and

each of said bent end segments of said connecting rods of said second frame unit has a positioning component for engaging said positioning hole when a corresponding one of said connecting rods is at the higher position.

5. The play yard as claimed in claim 4 , wherein said positioning component of each of said bent end segments is in a form of a rigid body.

6. The play yard as claimed in claim 4 , wherein:

each of said bent end segments of said connecting rods further has a tubular body and a through hole formed in said tubular body; and

said positioning component of each of said bent end segments has a resilient plate disposed in said tubular body, and a positioning protrusion formed on said resilient plate and biased to project outwardly from said tubular body through said through hole in said tubular body of a corresponding one of said bent end segments for positioning said resilient plate in said tubular body of the corresponding one of said bent end segments, said positioning protrusion being disposed for engaging said positioning hole in said internal bottom surface of the corresponding one of said corner couplers when the corresponding one of said connecting rods is at the higher position.

7. The play yard as claimed in claim 6 , wherein said resilient plate is a V-shaped plate.

8. The play yard as claimed in claim 6 , wherein each of said corner couplers further has a guide groove formed in said internal bottom surface and said internal side surface for guiding movement of said positioning protrusion of the corresponding one of said bent end segments into said positioning hole in said internal bottom surface of the corresponding one of said corner couplers when the corresponding one of said connecting rods is pivoted cram the lower position to the higher position.

9. The play yard as claimed in claim 4 , wherein:

each of said bent end segments further has a tubular body and a pair of through holes formed respectively in diametrically opposite sides of said tubular body; and

said positioning component of each of said bent end segments has a resilient plate disposed in said tubular body, and a pair of positioning protrusions formed on said resilient plate and biased to project outwardly and respectively from said tubular body through said through holes for positioning said resilient plate in said tubular body.

10. The play yard as claimed in claim 1 , wherein:

each of said bent end segments has a coupler-engaging, portion; and

a first imaginary straight line extending across and within a cross-section of said coupler-engaging portion and through a center of the cross-section, the first imaginary straight line having a length longer than a groove width of said positioning slot in a corresponding one of said corner couplers.

11. The play yard as claimed in claim 10 , wherein a second imaginary straight line extends across and within the cross-section of said coupler-engaging portion of each of said bent end segments, and intersects the first imaginary straight line at the center of the cross-section, the second imaginary straight line having a length shorter than the groove width of said positioning slot.

12. The play yard as claimed in claim 10 , wherein said coupler-engaging portion of each of said bent end segments has a rectangular cross-section that has a width slightly shorter than the groove width of said positioning slot on the corresponding one of said corner couplers.

13. The play yard as claimed in claim 10 , wherein said coupler-engaging portion of each of said bent end segments has an elliptic cross-section.

14. A bassinet device adapted for use with a play yard, the play yard including a first frame unit that has a plurality of spaced-apart upright rods, a plurality of corner couplers provided respectively on said upright rods, and a plurality of side rods, each interconnecting a pair of said corner couplers, said bassinet device comprising:

a bassinet-supporting second frame unit including a plurality of connecting rods, each having

a supporting segment, and

a pair of bent end segments that are connected respectively to longitudinally opposite ends of said supporting segment, and that are adapted to be connected movably and respectively to a pair of the corner couplers, such that each of said connecting rods is selectively positioned relative to the first frame unit at a lower position and a higher position located above the lower position; and

wherein each of said corner couplers has a pair of spaced-apart positioning slots movably and respectively retaining two corresponding ones of said bent end segments of an adjacent pair of said connecting rods.