Supporting rack structure

Abstract

An improved collapsible supporting rack structure with its bearing strength reinforced, the structure is comprised of: a plurality of link sets with their links in pairs pivotally cross-linking with each another; a plurality of connecting seats connected each with more than one link, thereby the link sets connecting with the connecting seats form a supporting rack; the structure is characterized by that: the structure is provided further with at least a post set; each post set includes at least two mutually parallel posts respectively located at the two lateral sides of a link set, the post has on each of the two ends thereof a linking block; the linking block includes a post seat fixed onto the post and a slide block slipped over a neighboring link. When the supporting rack is stretched out, the posts are moved by sliding of the slide blocks on the links, and are engaged in corresponding ones of the upper and lower connecting seats and supported by them, thereby the capability of loading of it can be increased.

1 . An improved collapsible supporting rack structure with its bearing strength reinforced, said structure is comprised of: a plurality of link sets with their links in pairs pivotally cross-linking with each another; a plurality of connecting seats including upper and lower connecting seats to be connected with the ends of said links, said upper connecting seats are respectively located right above the corresponding ones of said lower connecting seats; each of said connecting seats is connected with more than one of said links, thereby said link sets connecting with said connecting seats form a supporting rack; said structure is characterized by that: said structure is provided further with at least a post set; each of said post sets includes at least two mutually parallel posts respectively located at the two lateral sides of said link set, each of said posts has on each of the two ends thereof a linking block, said linking block includes two parts, one is the corresponding one of said post seats fixed onto said post, the other is a slide block slipped over a neighboring one of said links, the connecting area between said post seat and said slide block displaces in pursuance of stretching out and collapsing of said supporting rack; when said supporting rack is stretched out, said posts are moved by sliding of said slide blocks on said links, and are engaged in corresponding ones of said upper and lower connecting seats and supported by them, thereby the capability of bearing of said supporting rack is increased.  
     
     
         2 . An improved collapsible supporting rack structure with its bearing strength reinforced as claimed in  claim 1 , wherein the inner wall of the slide block is formed outwardly as an arc shape to help the contact face with the link to become the minimum extent, thereby, the resistance therebetween will become relatively small and the slide block can slide even more easier.  
     
     
         3 . An improved collapsible supporting rack structure with its bearing strength reinforced as claimed in  claim 1 , wherein, each of said link sets is provided at the lateral sides of a central pivot joint thereof respectively with a stop member, in order that when said supporting rack is collapsed, two of said posts of said post set are located at mutually symmetric positions.  
     
     
         4 . An improved collapsible supporting rack structure with its bearing strength reinforced as claimed in  claim 1 , wherein, said supporting rack is a supporting rack for a chair, a desk, a bed, a storage shelf, a tent or a wardrobe.