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A changing table for a playard includes a front and rear rails, and a pair of side rails connected to each other to form a platform substantially rectangular or elliptical in shape. A first pivot joint with a button mounted at the exterior is provided at one end of one of the pair of side rails. One

A changing table for a playard includes a front and rear rails, and a pair of side rails connected to each other to form a platform substantially rectangular or elliptical in shape. A first pivot joint with a button mounted at the exterior is provided at one end of one of the pair of side rails. One end of the rear rail is attached to a second pivot joint which corresponds to the first pivot joint in structure. The first and second pivot joints may be coupled to each other to define a space therein to receive a toothed disc and a compression spring. By means of the cooperation between the pivot joints, toothed disc and compression spring, the first pivot joint moved by the side rail is rotatable within a predetermined angular range and may be locked at a predetermined angle. By such arrangement, the user can readily actuate the button of the first pivot joint to swing the side rail attached to the first pivot joint, to thereby conveniently fold and/or unfold the changing table.

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1. A changing table for a playard comprising a first rail, a second rail, and a pair of side rails respectively connected to the first and second rails to form a generally rectangular platform, wherein the changing table has:a first pivot joint provided at one end of one of said pair of side rails,

1. A changing table for a playard comprising a first rail, a second rail, and a pair of side rails respectively connected to the first and second rails to form a generally rectangular platform, wherein the changing table has:a first pivot joint provided at one end of one of said pair of side rails, the first pivot joint is a substantially hollow cylindrical body, and includes at least two spaced ribs formed along an inner periphery thereof to define a groove therebetween;a second pivot joint provided at one end of the first rail connected to said side rail, the second pivot joint is a substantially hollow cylindrical body, and includes at least two spaced ribs corresponding to the ribs of the first pivot joint formed along an inner periphery thereof to define a groove corresponding to the groove of the first pivot joint, whereby the first and second pivot joints are capable of coupling to each other to define a space therein to receive a disc;the disc includes at least a radially extending tooth adapted to insert into the groove defined by the ribs of the first and second pivot joints;actuation means structured to move the disc from a locking position defined by the grooves of the first and second pivot joints to an unlock position in which the at least one tooth of the disc is disengaged from the first pivot joint; andwherein the first pivot joint is movable between an operation position in which the at least one tooth of the disc is engaged with the respective grooves of the first and second pivot joints to lock the first pivot joint, and a storage position in which the at least one tooth of the disc is disengaged from the respective groove of the first pivot joint so that the first pivot joint is unlocked and rotatable.2. The changing table according to claim 1, further having a compression spring received in the space defined by the first and second pivot joints upon coupling, and which cooperates with the actuation means to push the at least one tooth of the disc into the respective grooves of the first and second pivot joints by means of the spring force thereof in said operation position, and which disengages the at least one tooth of the disc from the groove of the first pivot joint in the storage position.3. The changing table according to claim 1 or 2, wherein the second rail is integral with the pair of side rails.4. The changing table according to claim 1 or 2, wherein the changing table is removably attached to the playard.5. The changing table according to claim 1 or 2, wherein the actuation means is a button.6. The changing table according to claim 1 or 2, wherein the second pivot joint includes a bar adapted to be attached to the playard so that the changing table can be fixed to the playard.7. A changing table for a playard comprising a first rail, a second rail, and a pair of side rails respectively connected to the first and second rails to form a generally rectangular platform the changing table having:a first pivot joint provided at one end of one of said pair of side rails, the first pivot joint is a substantially hollow cylindrical body closed at one end through which a button is inserted, the first pivot joint includes a plurality of spaced ribs formed along an inner periphery thereof, and the plurality of ribs is configured to define a groove each in two adjacent ribs;a second pivot joint provided at one end of the first rail connected to said side rail, the second pivot joint is a substantially hollow cylindrical body closed at one end, and includes a plurality of ribs corresponding to the ribs of the first pivot joint formed along an inner periphery thereof to define grooves corresponding to the grooves of the first pivot joint, whereby the first and second pivot joints are capable of coupling to each other to define a space therein to receive a toothed disc and a compression spring;the toothed disc includes a plurality of radially extending teeth adapted to insert into the grooves defined by the ribs of the first and second pivot joints; andwherein the first pivot joint is movable between an operation position and a storage position, wherein in the operation position, the teeth of the disc are engaged with the respective grooves of the first and second pivot joints by the spring force of the compression spring to lock the first pivot joint; and to move the first pivot joint to the storage position, the button is actuated to press the toothed disc to urge on the compression spring so that the toothed disc moves towards the second pivot joint to disengage from the first pivot joint, whereby the first pivot joint is capable of being rotated to reach the storage position.8. The changing table according to claim 7, wherein each of the ribs of the first and second pivot joints are substantially triangular in cross-section, and the ribs are substantially regularly spaced apart from each other, but in two appropriate positions, at least a rib is omitted so that a wider space is formed in between two adjacent ribs, the plurality of teeth of the toothed disc are spaced apart from each other and each having a substantially triangular cross-section, and at least one of the teeth is replaced with a substantially rectangular gear-shaped block, the teeth and the gear-shaped block of the toothed disc are configured to be inserted into the respective grooves and wider spaces of the first and second pivot joints, respectively, to lock the first pivot joint.9. The changing table according to claim 7 or 8, wherein the second rail is integral with the pair of side rails.10. The changing table according to claim 7 or 8, wherein the changing table is removably attached to the playard.11. The changing table according to claim 7 or 8, wherein the second pivot joint includes a bar adapted to be attached to the playard so that the changing table can be fixed to the playard.