Folding device for a playyard

A folding device to be mounted between two sections of one rail of a playyard to achieve a folding thereof, said folding device comprising:

• a sheet body bent to integrally form a front plate, a rear plate opposed to the front plate and a middle arcuate plate coupling top edges of the front plate and the rear plate, said front plate defining a hole in a center thereof, a middle portion of said rear plate further being bent to define a channel, said channel defining a first socket aligning with the hole of the front plate;
• a press button having a rectangular pedestal with a stepped portion received in the channel of the rear plate and a protrusion integrally extending from the stepped portion of the pedestal and selectively projecting beyond the hole of the front plate of the sheet body, said pedestal having two truncated bevels at two corners of the stepped portion and defining a second socket in a back thereof aligning with the first socket of the rear plate of the sheet body;
• and
• resilient means compressed between the first socket of the rear plate of the sheet body and the second socket of the press button for selectively urging the press button.