Sliding device for playpen

Abstract

A sliding device for a playpen includes a support unit, a clamping unit juxtaposed to the support unit, a guide unit mounted on the support unit and the clamping unit, and a lifting unit movably mounted on the guide unit. The lifting unit is mounted on a support bar to move the support bar. Thus, the support bar can be moved downward so that a user's hands can extend into the playpen easily and conveniently to facilitate the user holding and taking care of the baby. In addition, the support bar is movable to a height equal to that of the user's bed so that the user can take care of the baby easily and conveniently.

1 . A sliding device, comprising:
 a support unit;   a clamping unit juxtaposed to the support unit;   a guide unit mounted on the support unit and the clamping unit;   a lifting unit movably mounted on the guide unit.   
   
   
       2 . The sliding device in accordance with  claim 1 , wherein:
 the support unit includes a mounting seat, a push button movably mounted in the mounting seat, and a biasing member mounted in the mounting seat and biased between the mounting seat and the push button to push the push button outwardly relative to the mounting seat;   the clamping unit includes a clamping block juxtaposed to the mounting seat of the support unit;   the guide unit includes a guide track mounted on the mounting seat of the support unit and the clamping block of the clamping unit and having an upper end formed with a locking hole, and a stop block mounted on a lower end of the guide track;   the lifting unit includes a movable block movably mounted on the guide track of the guide unit, a locking rod movably mounted in the movable block and detachably locked in the locking hole of the guide track to lock the movable block onto the guide track, and an elastic member mounted in the movable block and biased between the locking rod and the movable block to push the locking rod toward the locking hole of the guide track.   
   
   
       3 . The sliding device in accordance with  claim 2 , wherein the mounting seat of the support unit has a first side formed with a mounting recess for mounting the push button and the biasing member. 
   
   
       4 . The sliding device in accordance with  claim 3 , wherein:
 the mounting seat of the support unit has a second side formed with a fixing recess located opposite to the mounting recess;   the clamping block of the clamping unit is clamped on the upright support rod and has a first side formed with a fixing channel aligning with the fixing recess of the mounting seat;   the guide track of the guide unit is mounted in the fixing recess of the mounting seat and the fixing channel of the clamping block.   
   
   
       5 . The sliding device in accordance with  claim 4 , wherein:
 the fixing channel of the clamping block has a lower end formed with a fixing hole;   the lower end of the guide track of the guide unit is formed with a fixing bore aligning with the fixing hole of the clamping block;   the stop block of the guide unit protrudes outwardly from the guide track and has an inside formed with a fixing aperture aligning with the fixing bore of the guide track;   the guide unit further includes a fixing rivet extended through the fixing aperture of the stop block, the fixing bore of the guide track and the fixing hole of the clamping block to secure the stop block to the guide track and to secure the guide track to the clamping block.   
   
   
       6 . The sliding device in accordance with  claim 4 , wherein the movable block of the lifting unit has a first side formed with a receiving groove to receive the locking rod and elastic member. 
   
   
       7 . The sliding device in accordance with  claim 6 , wherein:
 the guide track of the guide unit has an inside formed with a slideway;   the first side of the movable block is provided with an elongated slide inserted into and slidably mounted in the slideway of the guide track.   
   
   
       8 . The sliding device in accordance with  claim 7 , wherein:
 the guide track of the guide unit has two substantially L-shaped guide rails between which the slideway is located.   the slide of the movable block has a substantially T-shaped cross-sectional profile and is provided with two protruding limit flanges limited by the guide rails of the guide track to prevent the slide of the movable block from being detached from the slideway of the guide track.   
   
   
       9 . The sliding device in accordance with  claim 4 , wherein:
 the mounting seat of the support unit has a side wall formed with a passage connected to the fixing recess and aligning with the push button;   the locking hole of the guide track aligns with the passage of the mounting seat;   the push button of the support unit is movably mounted in the mounting recess of the mounting seat and provided with a push rod that is movable to extend through the passage of the mounting seat.   
   
   
       10 . The sliding device in accordance with  claim 9 , wherein the biasing member of the support unit is mounted on the push rod of the push button. 
   
   
       11 . The sliding device in accordance with  claim 9 , wherein the locking rod of the lifting unit is extended through the passage of the mounting seat and rested on the push rod of the push button. 
   
   
       12 . The sliding device in accordance with  claim 2 , wherein:
 the mounting seat of the support unit has an upper portion formed with a downward extending stop wall;   the upper end of the guide track is formed with an upward extending flange secured in the stop wall of the mounting seat.   
   
   
       13 . The sliding device in accordance with  claim 6 , wherein:
 the mounting seat of the support unit has a first end formed with a first mounting hole mounted on a transverse support rod and a second end formed with a second mounting hole mounted on an upright support rod and being perpendicular to the first mounting hole;   the movable block of the lifting unit has a second side formed with a mounting bore mounted on a transverse support bar and being perpendicular to the first mounting hole and the second mounting hole of the mounting seat.   
   
   
       14 . The sliding device in accordance with  claim 13 , wherein the clamping block of the clamping unit has a second side formed with a clamping recess clamped on the upright support rod. 
   
   
       15 . The sliding device in accordance with  claim 13 , wherein the clamping unit further includes a fixing rivet extended through the clamping block and the upright support rod to secure the clamping block to the upright support rod. 
   
   
       16 . The sliding device in accordance with  claim 13 , wherein the support unit further includes a fixing rivet extended through the mounting seat and the transverse support rod to secure the mounting seat to the transverse support rod. 
   
   
       17 . The sliding device in accordance with  claim 13 , wherein the lifting unit further includes a fixing rivet extended through the movable block and the support bar to secure the movable block to the support bar. 
   
   
       18 . The sliding device in accordance with  claim 7 , wherein the receiving groove of the movable block is extended through the slide and is movable to align with the locking hole of the guide track. 
   
   
       19 . The sliding device in accordance with  claim 11 , wherein:
 when the push button of the support unit is pressed toward the mounting seat, the locking rod of the lifting unit is pushed by the push rod of the push button and is detached from the locking hole of the guide track to unlock the movable block from the guide track so that the movable block of the lifting unit is movable on the guide track of the guide unit to move the support bar;   when the movable block of the lifting unit is movable to a lowermost position of the guide track of the guide unit, the movable block of the lifting unit is stopped by the stop block of the guide unit.   
   
   
       20 . The sliding device in accordance with  claim 2 , wherein the mounting seat of the support unit has a substantially triangular shape.