the present invention relies on the flexible and memory retaining characteristics of certain types of spring like materials such as spring steel , polycarbonate or other thermoplastic materials such as nylon . the preferred material for use in the construction of the collapsible toy hoop of the present embodiment of the present invention is nylon . and more specifically nylon type 6 / 6 . nylon 6 / 6 has resilient spring like characteristics that make it suitable for the use in the construction of the present invention in that this material succumbs to the forces of creep when the hoop is in the open and closed condition . that is to say that the hoop reaches a stable condition in the open position and maintains this open characteristic memory . the hoop also attains a stable condition in the collapsed condition and maintains this collapsed characteristic memory . the stable condition which occurs in both the open and closed condition prevents an explosive uncontrollable deployment of the device when one is opening the toy for play . the creep memory that prevails in the closed condition holds the device in the collapsed condition without the need of a retaining device or carrying case . when deploying the toy for use the user may grasp two opposite sides of the collapsed hoop and reversibly rotate the sections until the restoring force memory of the hoop in the open condition takes over . this is termed the deployment or collapsing threshold . the deployment or collapsing threshold will be experience at near the half way point of either the collapsing or deployment articulation . nylon 6 / 6 also has a relatively high melt point and will not become overly limber or limp when heated under normal atmospheric conditions . heating of some materials may cause a hoop made from a different type of plastic material such as polypropylene to anneal in the closed condition making it nearly impossible to deploy or cause the material to hold an unusable serpentine or wavy shape when deployment is finally accomplished . the preferred material nylon 6 / 6 is also rigid to the degree that it will provide satisfactory performance without excessive deformation caused by centrifugal forces during the whirling of the device around ones body . it is to be understood that the hoop of the present invention may be constructed from numerous profiles such as rectangular , oval , square , circular , egg shape , teardrop , crescent , reversed crescent , figure eight , diamond etc . or with any number of crimp preventative features designed into the hoop as might be neccessary depending on the desired characteristics of the hoop . the hoop may be constructed as a solid extrusion as well in the shape of a rod or bar configuration . in conjunction a resilient foam like material may be sleeved over the hoop material to lend softening or floatation characteristics to the toy of the present invention . it will be noted that variations in the design and construction of the present invention will not effect the true spirit and scope of the present invention . the reader will see that the collapsible toy hoop of the present invention can be used for a variety of activites and that because of the compact nature of the device that it may be easily stored and transported . the hoop of the present invention collapses down to approximately ⅓ its open size and may be easily transported in a child &# 39 ; s backpack
a collapsible toy hoop having a circular open position that may be whirled about ones body for entertainment and exercise activities . the flexible hoop may be collapsed down from the open position into 3 smaller concentric sub - hoops to facilitate ease of storage and transportability .