Abstract: A convertible tandem stroller frame is capable of locking in a tandem stroller mode for installing a second seat thereby concurrently transporting two occupants, and capable of converting said mode into a single seat mode for transporting single occupant by simply manipulating a release actuator at a front portion of the convertible tandem stroller frame. The convertible tandem stroller frame may include a front rack, a rear rack, at least a longitudinal telescopic mechanism and at least a locking mechanism. The front rack and the rear rack are lockably and adjustably connected by the longitudinal telescopic mechanism, so as to be extended into the tandem stroller mode and be retracted into the single seat mode. The locking mechanism is associated with the release actuator for locking and un-locking the longitudinal telescopic mechanism by manipulating in front of the convertible tandem stroller frame.

Abstract: A baby bouncer with a width variable frame is configured to have an erected configuration for use as a regular baby bouncer, and a folded configuration for reducing the width of the baby bouncer when being not in use. The frame of the baby bouncer includes at least a base frame, a pair of bouncing support rods and a baby carrier frame. The base frame and the bouncing support rods are associated by two gear elements. By meshing the first gear element and the second gear element, the bouncing support rods and the bouncing support rods are capable of simultaneously rotating in an opposite direction either in erecting or folding of the baby bouncer. When need to fold the frame of baby bouncer into the folded configuration, care-giver may unlock two lockable joints of the baby carrier frame and fold to associating the bouncing support rods and the base frame.

Abstract: A convertible tandem stroller frame is capable of locking in a tandem stroller mode for installing a second seat thereby concurrently transporting two occupants, and capable of converting said mode into a single seat mode for transporting single occupant by simply manipulating a release actuator at a front portion of the convertible tandem stroller frame. The convertible tandem stroller frame may include a front rack, a rear rack, at least a longitudinal telescopic mechanism and at least a locking mechanism. The front rack and the rear rack are lockably and adjustably connected by the longitudinal telescopic mechanism, so as to be extended into the tandem stroller mode and be retracted into the single seat mode. The locking mechanism is associated with the release actuator for locking and un-locking the longitudinal telescopic mechanism by manipulating in front of the convertible tandem stroller frame.

Abstract: A joint assembly with safety locking mechanisms for baby stroller, the baby stroller frame may have at least a front strut, a rear strut and an upper bar; and the joint assembly includes a lower joint member, an upper joint member, a first locking mechanism, a second locking mechanism and a release mechanism. The lower joint member is pivotally connected with the upper end of the front strut and pivots with the rear strut through a pivot mount atop the rear strut. The upper joint member pivots with the lower joint member and connects with the lower end of the upper bar. The first locking mechanism is adapted to releasably lock the lower joint member to the upper joint member thereby to inhibit the potential relative rotation between the lower joint member and the upper joint member. The second locking mechanism is adapted to releasably lock the rear strut to the joint assembly thereby to inhibit the potential relative rotation between the rear strut and the joint assembly.

Abstract: A wheeled tail platform comprises a platform, a pair of connecting rods, and a wheel assembly. The platform has an indent formed on its downside for positioning on a cross bar or a rear axle of the stroller frame. The wheel assembly is pivotally connected to the platform for supporting the platform at rear end. The connecting rods each has one end pivoted to a pair of rear wheel struts of the stroller frame respectively, and another end pivoted with a front end of the platform, so as to allow the platform to pivot and collapse upward and close to the rear wheel struts. A pair of grab-handle armrests is connected to a pair of handle bars of the stroller respectively for grabbing by the occupant's hand during standing on for traveling around. Through the connecting and arrangement as being depicted, the wheeled tail platform of the present invention is useable for making funs safely and collapsible with the stroller frame conveniently.