Abstract: The present invention employs a swivelable locking member which is pivotally connected to upper frame supports on a play yard. The frame of the play yard also employs vertical supports whose spacing is maintained by a number of lateral extending members. Complementary inner and outer support members are employed to maintain the shape of the play yard and relative position of the structural members of the play yard. Alternatively, a motion inhibiting insert may be placed between adjacent lateral extending members. This, combined with the swivelable locking bracket, ensures easy pivot assembly or disassembly of the present invention, and ensures that the play yard will not accidentally collapse.

Abstract: This invention relates to an improved collapsible structure for a stroller, mainly comprising an engaging member and a seat member on the rear leg, a limit block on the back rest, a leaf spring in the seat member, and a spring in the engaging member, whereby when the user applies a force on the seat member to press the leaf spring, the engaging member will be moved by the connection between the engaging member and the seat member as well as the connection between the limit block and the seat member and therefore enabling the stroller to be collapsed.

Abstract: This invention relates to a controlling structure for a handle and castors of a stroller and in particular to one utilizing a driven seat to activate a movable member which in turn pulls two strings so as to change the front castors from a freely rotatable state to a fixed-position state and the rear castors from a fixed-position state to a freely rotatable state when the handle is pushed to the other side, thereby enabling a user to control the stroller easily even when he pushes the handle to the other side so as to change the travelling direction.