Foldable playyard

Abstract

A foldable playyard includes a first surrounding frame, a second surrounding frame, a boundary shelter including a plurality of boundary walls mounted between the first and second surrounding frames to define a playyard cavity within the boundary walls, and a supporting frame, which is surrounded by the boundary shelter, including a plurality of supporting arms, in such a manner that each of the supporting arms is capable of moving between a folded position and an unfolded position. In the folded position, the first surrounding frame is adapted to fold towards the second surrounding frame so as to minimize a depth of the playyard cavity, and in the unfolded position, each of the supporting arms is arranged to substantially support between the first and second surrounding frames and to tensely stretch the boundary shelter, so as to form a tension surface on each of the boundary walls.

What is claimed is:  
     
         1 . A foldable playyard, comprising: 
 a first surrounding frame;    a second surrounding frame spaced apart from said first surrounding frame in a vertical direction;    a boundary shelter comprising a bottom wall and a plurality of boundary walls upwardly extended from a circumferential edge of said bottom wall and mounted between said first and second surrounding frames to define a playyard cavity within said boundary walls and said bottom wall; and    a supporting frame, which is surrounded by said boundary shelter, comprising a plurality of supporting arms each coupling said first surrounding frame with said second surrounding frame, each of said boundary walls having a width slightly smaller than a distance between two adjacent supporting arms, wherein each of said supporting arms is capable of moving between a folded position and an unfolded position, wherein in said folded position, said first surrounding frame is adapted to fold towards said second surrounding frame so as to minimize a depth of said playyard cavity, and in said unfolded position, each of said supporting arms is arranged to substantially support between said first and second surrounding frames and to tensely stretch said boundary shelter, so as to form a tension surface on each of said boundary walls.    
     
     
         2 . A foldable playyard, as recited in  claim 1 , wherein each of said supporting arms has a retaining end detachably connected to said first surrounding frame and a folding end pivotally connected to said second surrounding arm in such a manner that when each of said supporting arms is pivotally folded to a position that perpendicular to said second surrounding frame, said boundary shelter is tensely pull aside to form said tension on each of said boundary walls.  
     
     
         3 . A foldable playyard, as recited in  claim 2 , wherein said first surrounding frame comprises two pairs of first surrounding arms connected ends to ends to form a rectangular boundary structure and four coupling joints provided at four corners thereof for detachably connecting with said supporting frame.  
     
     
         4 . A foldable playyard, as recited in  claim 3 , wherein each of said coupling joints has a tubular sleeve having an opening facing towards said second surrounding frame wherein said retaining end of each of said supporting arms is fittedly inserted into said tubular sleeve, so as to detachably connect said supporting frame with said first surrounding frame.  
     
     
         5 . A foldable playyard, as recited in  claim 3 , wherein each of said coupling joints has four locking through sleeves, which are transversely provided at four corners of said first surrounding frame respectively, for said retaining ends of said supporting arms fittedly inserting thereinto and comprises four locking members arranged to fittedly insert into said retaining ends of said supporting arms through said locking through sleeves respectively, so as to detachably lock up said supporting frame with said first surrounding frame.  
     
     
         6 . A foldable playyard, as recited in  claim 2 , wherein said second surrounding frame comprises two pairs of second surrounding arms connected ends to ends to form a rectangular boundary structure that said folding ends of said supporting arms are pivotally connected at four corners thereof respectively, wherein each of said second surrounding arms has a U-shaped cross section to define a receiving cavity in such a manner that each of said supporting arms is adapted to pivotally fold towards said respective second surrounding arm and fittedly received in said receiving cavity thereof.  
     
     
         7 . A foldable playyard, as recited in  claim 3 , wherein said second surrounding frame comprises two pairs of second surrounding arms connected ends to ends to form a rectangular boundary structure that said folding ends of said supporting arms are pivotally connected at four corners thereof respectively, wherein each of said second surrounding arms has a U-shaped cross section to define a receiving cavity in such a manner that each of said supporting arms is adapted to pivotally fold towards said respective second surrounding arm and fittedly received in said receiving cavity thereof.  
     
     
         8 . A foldable playyard, as recited in  claim 4 , wherein said second surrounding frame comprises two pairs of second surrounding arms connected ends to ends to form a rectangular boundary structure that said folding ends of said supporting arms are pivotally connected at four corners thereof respectively, wherein each of said second surrounding arms has a U-shaped cross section to define a receiving cavity in such a manner that each of said supporting arms is adapted to pivotally fold towards said respective second surrounding arm and fittedly received in said receiving cavity thereof.  
     
     
         9 . A foldable playyard, as recited in  claim 5 , wherein said second surrounding frame comprises two pairs of second surrounding arms connected ends to ends to form a rectangular boundary structure that said folding ends of said supporting arms are pivotally connected at four corners thereof respectively, wherein each of said second surrounding arms has a U-shaped cross section to define a receiving cavity in such a manner that each of said supporting arms is adapted to pivotally fold towards said respective second surrounding arm and fittedly received in said receiving cavity thereof.  
     
     
         10 . A foldable playyard, as recited in  claim 6 , wherein said second surrounding frame comprises two pairs of second surrounding arms connected ends to ends to form a rectangular boundary structure that said folding ends of said supporting arms are pivotally connected at four corners thereof respectively, wherein each of said second surrounding arms has a U-shaped cross section to define a receiving cavity in such a manner that each of said supporting arms is adapted to pivotally fold towards said respective second surrounding arm and fittedly received in said receiving cavity thereof.  
     
     
         11 . A foldable playyard, as recited in  claim 1 , wherein each of said supporting arms is constructed by a pair of first and second supporting pillars having two outer ends pivotally connected to said first and second surrounding frames respectively and two inner ends pivotally connected with each other in such a manner that each of said supporting arms is adapted to be pivotally folded in half.  
     
     
         12 . A foldable playyard, as recited in  claim 11 , wherein said supporting frame further comprises a plurality of locking units slidably mounted on said supporting arms respectively for locking up said first supporting pillar with said second supporting pillar in a pivotally movable manner, wherein each of said locking units comprises a tubular locker has an axial slider sleeve which has a diameter slightly larger than a diameter of said respective supporting arm for said first supporting pillar passing through, wherein said slider sleeve has an inner threaded portion arranged to rotatably screw with an outer threaded portion provided on said second supporting pillar so as to securely lock up said first supporting pillar with said second supporting pillar in a pivotally movable manner.  
     
     
         13 . A foldable playyard, as recited in  claim 12 , wherein each of said first and second surrounding frame comprises two pairs of first and second surrounding arms connected ends to ends to form a rectangular boundary structure respectively wherein each of said first and second surrounding arms has a U-shaped cross section to define a receiving cavity in such a manner that said first and second supporting pillars are capable of pivotally folding into said respective receiving cavities of said first and second surrounding arms respectively.  
     
     
         14 . A foldable playyard, as recited in  claim 11 , further comprising a plurality of first and second locker members mounted to said first and second surrounding frames for locking said supporting arms with said first and second surrounding frames respectively, wherein each of said first and second surrounding frames has four locking through sleeves transversely provided at four corners thereof respectively, in such a manner that each of said first and second locker members is arranged to fittedly insert into two ends of said respective supporting arm through said locking through sleeves respectively, so as to lock up said supporting arm between said first and second surrounding frames in a pivotally movable manner.  
     
     
         15 . A foldable playyard, as recited in  claim 13 , further comprising a plurality of first and second locker members mounted to said first and second surrounding frames for locking said supporting arms with said first and second surrounding frames respectively, wherein each of said first and second surrounding frames has four locking through sleeves transversely provided at four corners thereof respectively, in such a manner that each of said first and second locker members is arranged to fittedly insert into two ends of said respective supporting arm through said locking through sleeves respectively, so as to lock up said supporting arm between said first and second surrounding frames in a pivotally movable manner.  
     
     
         16 . A foldable playyard, as recited in  claim 1 , wherein each of said first and second surrounding frame comprises two pairs of first and second surrounding arms connected ends to ends to form a rectangular boundary structure respectively, wherein each of said supporting arms has a retaining end coupling with said first surrounding frame at a corner thereof and a folding end detachably connected to said second surrounding frame at a corner thereof.  
     
     
         17 . A foldable playyard, as recited in  claim 16 , wherein said second surrounding frame further comprises four second coupling joints each comprising a locking member firmly attached to said folding end of said respective supporting arm and further having a guiding through slot transversely provided at a corner of said second surrounding frame for said locking member slidably mounted thereto.  
     
     
         18 . A foldable playyard, as recited in  claim 17 , wherein each of said guiding through slots has an inner inserting portion having a size slightly larger than a size of said locking member and an outer holding portion, having an upper blocking shoulder, integrally extended from said inserting portion in such a manner said locking member is adapted to pass through said inserting portion and slidably move to said holding portion such that said locking member is blocked by said blocking shoulder to lock up said respective supporting arm to said second surrounding frame, so that when the supporting arms are pull outwardly from said inserting portion to said holding portion, said boundary shelter is stretched aside to form said tension surface on each of said boundary walls.  
     
     
         19 . A foldable playyard, as recited in  claim 18 , wherein said first surrounding frame comprises four first coupling joints provided at four corners thereof, wherein each of said first coupling joints has a tubular sleeve having an opening facing towards said second surrounding frame wherein said retaining end of said respective supporting arms is fittedly inserted into said tubular sleeve, so as to detachably connect said supporting frame with said first surrounding frame.  
     
     
         20 . A foldable playyard, as recited in  claim 18 , wherein said first surrounding frame comprises four first coupling joints each having a locking through sleeve, which are transversely provided at a corner of said first surrounding frame, for said retaining end of said respective supporting arm fittedly inserting thereinto and a locking member arranged to fittedly insert into said retaining end of said respective supporting arm through said locking through sleeve, so as to detachably lock up said supporting frame with said first surrounding frame.