Playpen that is Movable and Foldable Easily and Quickly

Abstract

A playpen includes a frame, four upper folding devices, two lower folding devices, a pull cord, and two lower collapsible devices. Each of the lower folding devices includes a first connecting member, a second connecting member, a mounting bracket, a locking member, an elastic member, and a compression spring. Each of the lower collapsible devices has a second compression spring. Thus, each of the lower folding devices is operated to fold the frame in a first stage, and each of the lower collapsible devices is operated to fold the frame in a second stage, so that the playpen is folded in a two-stage manner. In addition, the user only needs to pull the pull cord to unlock each of the lower folding devices so as to partially fold the frame easily and quickly.

1 . A playpen, comprising:
 a frame including a plurality of support rods pivotally connected with each other;   four upper folding devices mounted on an upper portion of the frame to fold the upper portion of the frame;   two lower folding devices mounted on two opposite first sides of a lower portion of the frame to fold the two opposite first sides of the lower portion of the frame;   a pull cord mounted between the two lower folding devices to control operation of the two lower folding devices;   two lower collapsible devices mounted on two opposite second sides of the lower portion of the frame to fold the two opposite second sides of the lower portion of the frame;   each of the two lower folding devices including:   a first connecting member mounted on a respective one of the support rods of the frame;   a second connecting member mounted on a respective one of the support rods of the frame and pivotally connected with the first connecting member;   a mounting bracket mounted on the first connecting member and the second connecting member;   a locking member movably mounted in the mounting bracket and movable between a first position where the locking member locks the first connecting member and the second connecting member so that the first connecting member and the second connecting member are locked onto the mounting bracket and a second position where the locking member unlocks the first connecting member and the second connecting member so that the first connecting member and the second connecting member are pivotable relative to the mounting bracket.   
   
   
       2 . The playpen in accordance with  claim 1 , wherein
 the first connecting member of each of the two lower folding devices has a first end inserted into the respective one of the support rods of the frame and a second end provided with a bifurcate mounting portion provided with two spaced locking holes;   the second connecting member of each of the two lower folding devices has a first end inserted into the respective one of the support rods of the frame and a second end provided with a bifurcate mounting section which is pivotally mounted in the mounting portion of the first connecting member and is provided with two spaced locking bores each juxtaposed to the respective locking hole of the first connecting member;   the locking member of each of the two lower folding devices is driven by the pull cord and has a bottom provided with two spaced locking blocks that are movable with the locking member between the first position where each of the two locking blocks of the locking member is inserted into the respective locking hole of the first connecting member and the respective locking bore of the second connecting member to lock the first connecting member and the second connecting member and the second position where each of the two locking blocks of the locking member is detached from the respective locking hole of the first connecting member and the respective locking bore of the second connecting member to unlock the first connecting member and the second connecting member.   
   
   
       3 . The playpen in accordance with  claim 2 , wherein each of the two lower folding devices further includes:
 an elastic member mounted in the mounting bracket and biased between the mounting bracket and the locking member to push the locking member to the first position thereof.   
   
   
       4 . The playpen in accordance with  claim 1 , wherein each of the two lower folding devices further includes:
 a compression spring mounted between any two of the support rods of the frame and abutting the mounting bracket;   a protective jacket mounted around the compression spring.   
   
   
       5 . The playpen in accordance with  claim 1 , wherein each of the two lower collapsible devices is mounted between two of the support rods of the frame and pressed by a second compression spring which is mounted between the two of the support rods of the frame. 
   
   
       6 . The playpen in accordance with  claim 5 , wherein the second compression spring is provided with a protective jacket. 
   
   
       7 . The playpen in accordance with  claim 3 , wherein the mounting bracket of each of the two lower folding devices has an inside provided with a mounting chamber for mounting the mounting portion of the first connecting member and the mounting section of the second connecting member. 
   
   
       8 . The playpen in accordance with  claim 7 , wherein the mounting bracket of each of the two lower folding devices has an upper portion provided with a slideway in which the locking member is slidable. 
   
   
       9 . The playpen in accordance with  claim 8 , wherein the slideway of the mounting bracket of each of the two lower folding devices has a bottom provided with a guide channel connected to the mounting chamber to guide movement of the two locking blocks of the locking member. 
   
   
       10 . The playpen in accordance with  claim 8 , wherein
 the locking member of each of the two lower folding devices has a first end provided with a fixing recess and a second end provided with a receiving chamber;   the mounting bracket of each of the two lower folding devices has a first side provided with a through hole and a second side provided with an opening connected to the slideway for mounting a catch plate;   the pull cord has two distal ends each extending through the through hole of the mounting bracket and the locking member of the respective lower folding device and each provided with an enlarged head secured in the fixing recess of the locking member;   the elastic member of each of the two lower folding devices has a first end abutting the first side of the mounting bracket and a second end received in the receiving chamber of the locking member to push the locking member toward the catch plate which is used to stop movement of the locking member.   
   
   
       11 . The playpen in accordance with  claim 10 , wherein
 the locking member of each of the two lower folding devices has a periphery provided with an elongated entrance slit connected to the fixing recess;   each of the two distal ends of the pull cord extends through the entrance slit into the fixing recess of the locking member.   
   
   
       12 . The playpen in accordance with  claim 1 , further comprising:
 an enclosure cloth enclosed around a periphery of the frame to encompass the upper folding devices, the lower folding devices and the lower collapsible devices;   a plurality of snap fasteners mounted on the support rods of the frame.   
   
   
       13 . The playpen in accordance with  claim 1 , wherein the lower portion of the frame has a periphery provided with four castors. 
   
   
       14 . The playpen in accordance with  claim 2 , wherein each of the two lower folding devices further includes a pivot pin extending through the mounting bracket, the mounting portion of the first connecting member and the mounting section of the second connecting member to combine the mounting bracket, the mounting portion of the first connecting member and the mounting section of the second connecting member. 
   
   
       15 . The playpen in accordance with  claim 1 , wherein the mounting bracket of each of the two lower folding devices has a substantially inverted U-shaped cross-sectional profile. 
   
   
       16 . The playpen in accordance with  claim 10 , wherein the locking member of each of the two lower folding devices is pushed by the elastic member to abut the catch plate so that each of the two locking blocks of the locking member is inserted into the respective locking hole of the first connecting member and the respective locking bore of the second connecting member. 
   
   
       17 . The playpen in accordance with  claim 16 , wherein the locking member of each of the two lower folding devices is pulled by the respective distal end of the pull cord to compress the elastic member so that each of the two locking blocks of the locking member is detached from the respective locking hole of the first connecting member and the respective locking bore of the second connecting member.