Patent ID: 6954949

Claim:
A playpen with double columns at each corner of said playpen, comprising: a plurality of first corner components; a first rod unit connecting the first corner components; a plurality of second corner components; a second rod unit connecting the second corner components; a plurality of first columns, each said first column having two opposite ends, one end being connected to a first corner component, another end of said column being connected to a second corner component; a plurality of second columns, each said second column having two opposite ends, one end being connected to a first corner component, another end of said second column being connected to a second corner component each said second corner component comprising a first sleeve and a second sleeve connecting respectively with the first column and the second column; wherein a distance between the two second columns is larger than that between the two first columns, whereby a gap is formed between an adjacent fist column and a second column; and a boundary sheet extends through each said gap and covers the first columns.