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.

Description

[0001] 1. Field of the Invention[0002] The present invention is related to an improved collapsible supporting rack structure with its bearing strength reinforced; and especially to an improved supporting rack structure with its bearing capability and the firmness of the whole structure thereof increased.[0003] It is suitable for use on a chair, a desk, a bed, a storage shelf, a tent or a wardrobe etc. as a supporting rack.[0004] 2. Description of the Prior Art[0005] As shown in FIG. 1 which shows a conventional structure of a foldable chair, the structure includes a chair top surface 1 and a collapsible supporting rack 2; wherein the supporting rack 2 is composed of a plurality of link rods 21 cross-linking with one another, the chair top surface 1 is mounted on the supporting rack 2 to form therewith the structure of a foldable chair.[0006] The foldable chair meets the popularized market requirement, but by the fact that the cross-linking function of the link rods 21 results in mos...

AI Technical Summary

Problems solved by technology

The foldable chair meets the popularized market requirement, but by the fact that the cross-linking function of the link rods 21 results in most of the forces acting externally, causing a weak bearing strength compared to the downward loading force.

Therefore, when in use by a heavy user or even if lighter people "drop" into the chair, the foldable chair is subject to damage due to it's inability to withstand an overly large loading pressure.

This results in chair breakage and in several cases personal injury.

The main problem is that the supporting structure was not well designed for bearing strength; once the load on the supporting rack is increased, accidents may occur.

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