Extendable table

Abstract

An extendable table includes a table support, a table top which is movable relative to the table support, a table leaf, a guiding unit, and a guided bar. The table leaf is displaceable between a normal position, where the table leaf is disposed under the table top, and an extended position, where the table leaf is substantially coplanar with the table top. When the table top is lifted, the table leaf is permitted to be displaced from the extended position to the normal position.

What is claimed is: 
     
         1 . An extendable table comprising:
 a table support including
 a peripheral frame having left and right side segments opposite to each other in a longitudinal direction, and front and rear side segments opposite to each other in a direction transverse to the longitudinal direction, and 
 a mounting seat having forward and rearward end segments which are opposite to each other in the transverse direction, and which are disposed on said front and rear side segments, respectively; 
   a table top which has left and right marginal edges opposite to each other in the longitudinal direction, and which is disposed on said mounting seat such that said left and right marginal ends overlie said left and right side segments, respectively, said table top having an upper major surface;   a coupling member disposed to couple said table top with said mounting seat, and configured to permit said table top to be displaceable from a use position, where said table top rests on said mounting seat, to a raised position, where said table top is spaced apart from said mounting seat;   a left table leaf having a left upper surface, and movable in the longitudinal direction between a left normal position, where said left table leaf is disposed under said table top, and a left extended position, where said left upper surface is substantially coplanar with said upper major surface;   a guiding unit mounted to said mounting seat opposite to said table top, and having a first guideway which extends in the longitudinal direction, and which has a first lower position region distal from said left side segment and a first upper position region proximate to said left side segment; and   a left guided bar including a left bar body mounted to and disposed beneath said left table leaf, and a left key which is disposed on said left bar body distal from said left table leaf, which is engaged in said first guideway, and which is slidably displaceable between said first lower position region and said first upper position region, said left bar body being configured such that only when said table top is lifted from the use position to the raised position is said left table leaf permitted to be displaced from the left extended position to the left normal position to thereby displace said left key from said first upper position region to said first lower position region.   
     
     
         2 . The extendable table according to  claim 1 , wherein said left bar body includes a left tail segment disposed to support said left table leaf, and a left head segment which is opposite to said left tail segment in the longitudinal direction, and on which said left key is disposed, said left head segment having a left cutout portion which defines a left cutout surface facing said table top such that when said left key is displaced from said first lower position region to said first upper position region, said left upper surface of said left table leaf is permitted to be lifted to be substantially coplanar with said upper major surface of said table top. 
     
     
         3 . The extendable table according to  claim 2 , wherein said left side segment has a left groove configured to permit passage of said left bar body therethrough during displacement of said left table leaf between the left normal position and the left extended position. 
     
     
         4 . The extendable table according to  claim 3 , wherein said left guided bar further has a left limiting protrusion disposed on said left bar body and configured to be brought into abutting engagement with said left side segment once said left table leaf is displaced beyond the left extended position, thereby preventing over extension of said left table leaf. 
     
     
         5 . The extendable table according to  claim 1 , wherein said first guideway further has a first lowermost position region disposed between said first upper position region and said first lower position region such that said left table leaf is lifted against said table top when said left key is displaced to said first lowermost position region from said first lower position region. 
     
     
         6 . The extendable table according to  claim 1 , wherein said guiding unit includes two guiding members which are mounted to said mounting seat, which is extend in the longitudinal direction, and which are spaced apart from each other in the transverse direction, each of said guiding members having inner and outer surfaces opposite to each other in the transverse direction, said guiding unit having two of said first guideways which are formed in said inner surfaces of said guiding members, respectively, said left guided bar including two of said left bar bodies spaced apart from each other in the transverse direction, and two of said left keys, which extend outwardly and respectively from said left bar bodies, and which are respectively engaged in said first guideways. 
     
     
         7 . The extendable table according to  claim 6 , wherein said guiding unit further has two second guideways which are formed respectively in said outer surfaces of said guiding members, and which extend in the longitudinal direction, each of said second guideways having a second lower position region distal from said right side segment and a second upper position region proximate to said right side segment, said extendable table further comprising:
 a right table leaf having a right upper surface, and movable in the longitudinal direction between a right normal position, where said right table leaf is disposed under said table top, and a right extended position, where said right upper surface is substantially coplanar with said upper major surface; and   a right guided bar including
 two right bar bodies which are mounted to and disposed beneath said right table leaf, and which are spaced apart from each other in the transverse direction, and 
 two left keys which are disposed respectively on said right bar bodies distal from said right table leaf, which extend inwardly and respectively from said right bar bodies, and which are engaged respectively in said second guideways, each of said left keys being slidably displaceable between said second lower position region and said second upper position region of a corresponding one of said second guideways, each of said right bar bodies being configured such that only when said table top is lifted from the use position to the raised position is said right table leaf permitted to be displaced from the right extended position to the right normal position to thereby displace each of said right keys from said second upper position region to said second lower position region of the corresponding one of said second guideways. 
   
     
     
         8 . The extendable table according to  claim 1 , wherein said coupling member includes a recess formed in said mounting seat, and a protuberance extending downwardly from said table top and configured to be matingly fitted in and movable relative to said recess in said mounting seat so as to permit said table top to be displaced between the use position and the raised position.