Support leg and baby crib

Abstract

A support leg and a baby crib are disclosed. The support leg includes a main body portion, an extendable portion, an extension mechanism, and a buffer mechanism. The extendable portion is slidably connected to the main body portion and has an extended state and a retracted state relative to the main body portion. The extension mechanism is arranged between the main body portion and the extendable portion and configured to realize extension and retraction of the extendable portion. The buffer mechanism is configured to slow down an extension speed at which the extendable portion is switched from the retracted state to the extended state. When the extendable portion is switched from the retracted state to the extended state, the buffer mechanism can slow down the extension speed of the extendable portion.

1 . A support leg, comprising:
 a main body portion;   an extendable portion slidably connected to the main body portion and having an extended state and a retracted state relative to the main body portion;   an extension mechanism arranged between the main body portion and the extendable portion and configured to realize extension and retraction of the extendable portion; and   a buffer mechanism configured to slow down an extension speed at which the extendable portion is switched from the retracted state to the extended state.   
     
     
         2 . The support leg according to  claim 1 , wherein the main body portion includes a hollow sleeving housing, and the extendable portion is partially located inside the sleeving housing and movable relative to the sleeving housing, and
 wherein the buffer mechanism includes a sliding plug fastened to an end of the extendable portion located inside the sleeving housing, the sliding plug is in airtight fit with the main body portion to form an air accommodation chamber with a variable volume, the sliding plug is provided with a vent, and the air accommodation chamber is communicated with outside atmosphere only through the vent.   
     
     
         3 . The support leg according to  claim 2 , wherein the main body portion includes a fixed member and a first guide member that are arranged inside the sleeving housing, the fixed member is fastened to the sleeving housing, and an end of the first guide member is connected to the fixed member and the first guide member is arranged along an extension direction of the extendable portion, and
 wherein the sliding plug has a first accommodating groove arranged along the extension direction of the extendable portion, the first guide member is partially accommodated in the first accommodating groove, the first guide member is in airtight fit with a wall of the first accommodating groove to form the air accommodation chamber, and the vent is arranged at a base of the first accommodating groove.   
     
     
         4 . The support leg according to  claim 3 , wherein an airtight flange is arranged around an end of the first guide member away from the fixed member, and the airtight flange is in airtight fit with the wall of the first accommodating groove to form the air accommodation chamber. 
     
     
         5 . The support leg according to  claim 2 , wherein the vent has an adjustable size. 
     
     
         6 . The support leg according to  claim 2 , wherein the main body portion further includes a fixed member arranged inside the sleeving housing, the fixed member is fastened to the sleeving housing, and the extension mechanism includes a reset member, two ends of the reset member abutting against the fixed member and the sliding plug, respectively. 
     
     
         7 . The support leg according to  claim 6 , wherein the main body portion is further provided with a second guide member arranged along an extension direction of the extendable portion, an end of the second guide member is connected to the fixed member, and the reset member is arranged around the second guide member. 
     
     
         8 . The support leg according to  claim 7 , wherein the sliding plug has a second accommodating groove arranged along the extension direction of the extendable portion, the second guide member is partially accommodated in the second accommodating groove, and two ends of the reset member abut against the fixed member and a base of the second accommodating groove, respectively. 
     
     
         9 . The support leg according to  claim 2 , further comprising a locking mechanism configured to limit the extendable portion to the extended state. 
     
     
         10 . The support leg according to  claim 9 , wherein the locking mechanism includes a first mating member arranged on the sliding plug and a second mating member arranged on the fixed member, wherein the first mating member and the second mating member are in sliding fit, one of the first mating member and the second mating member is provided with a resistance portion, and the other of the first mating member and the second mating member is adapted to overcome resistance of the resistance portion to implement switching of the extendable portion from the extended state to the retracted state. 
     
     
         11 . The support leg according to  claim 10 , wherein the first mating member is a slider having a guide slot, the second mating member is a guide post in sliding fit with the guide slot, and the resistance portion is arranged on the slider. 
     
     
         12 . The support leg according to  claim 11 , wherein the guide post is adapted to press against the resistance portion to cause the resistance portion to elastically deform so that the extendable portion is switched to the retracted state, when the extendable portion is in the extended state and a force is applied to the extendable portion. 
     
     
         13 . The support leg according to  claim 11 , wherein the slider has a sliding main body and an elastic sheet, wherein the sliding main body and the elastic sheet enclose and form the guide slot, an end of the elastic sheet is connected to the sliding main body, another end of the elastic sheet is spaced apart from the sliding main body to form a gap, and an end of the elastic sheet close to the gap is provided with the resistance portion. 
     
     
         14 . The support leg according to  claim 13 , wherein the resistance portion is a blocking bulge arranged on the elastic sheet and extending towards the guide slot. 
     
     
         15 . The support leg according to  claim 2 , wherein two sides of the main body portion are each provided with the extendable portion, and the extension mechanism and the buffer mechanism are arranged between the main body portion and each of the extendable portions located on the two sides of the main body portion, respectively. 
     
     
         16 . The support leg according to  claim 15 , wherein the sliding plug of each of the buffer mechanisms located on the two sides of the main body portion, respectively, is in airtight fit with the main body portion to form the air accommodation chamber with the variable volume, wherein each of the sliding plugs located on the two sides of the main body portion, respectively is provided with the vent, and the air accommodation chamber is communicated with the outside atmosphere only through the vent. 
     
     
         17 . A baby crib, comprising a bed body, at least one column, and at least one support leg according to  claim 1 , two ends of the column being connected to the bottom of the bed body and the top of the support leg, respectively.