Structure of hula hoop

Abstract

A hula hoop comprised of multiple curved bodies which combine with a plurality of curved inner lids, and whereon multiple built-in hollows are installed at the curved inner lids and a plurality of soft protrusions are provide on the surface of the curved inner lids. The soft protrusions correspond to hollows of the curved inner lids such that the protrusions are drawn into the hollows when the protrusions make contact with the user's body, avoiding injury. In addition, the curved body comprises an inserting piece and an inserting aperture at two ends such that each curved body combines with the curved inner lid and can be connected to one another, forming a circular hula hoop.

1 . A hula hoop, comprising:
 multiple curving bodies having an inserting piece at one end, and an inserting aperture at other end; at least one positioning column and a fixing plug are provided at the inner place of the inserting piece and the inserting aperture respectively, wherein a positioning aperture is defined in the positioning column;   a plurality of curving lids having multiple hollow portions, and at least one assembling plug and one fixing column provided at the inner side of the curving lids; wherein a positioning aperture is defined in the fixing column; every curving lid comprises a soft curving protrusion which is attached to the surface of the curving lid, and each soft curving protrusion corresponds to a hollow portion of the curving lid; additionally, the assembling plug of the curving lid is plugged and positioned into the positioning aperture of the positioning column, and the fixing plug of the curved body is also plugged and positioned into the positioning aperture of the fixing column;   all curving bodies which combine with curving lids are connected to one another, i.e., the inserting pieces of one curving body is inserted into the inserting apertures of another curving body, forming a circular hula hoop.   
   
   
       2 . The hula hoop of  claim 1 , wherein one side of the inserting piece further defines a first positioning ridge, and the other side further defines a second positioning ridge; correspondingly, one side of the inner wall of the inserting aperture also defines a first positioning chute which corresponds to said first positioning ridge, and the other side of the inner wall defines a second positioning chute which corresponds to said second positioning ridge; when the inserting piece of one curving body is inserted into the inserting aperture of another curving body, the first positioning ridge is locked with the first positioning chute, and the second positioning ridge is locked with the second positioning chute. 
   
   
       3 . The hula hoop of  claim 1 , wherein the positioning aperture of the positioning column further comprises a first positioning aperture and second positioning aperture, and a stopper provided between the first positioning aperture and second positioning aperture; when the assembling plug of the curving lid is plugged into the second positioning aperture, a fastener is provided to screw onto the first positioning aperture and the stopper, affixing them to the assembling plug of the curving lid. 
   
   
       4 . The hula hoop of  claim 1 , wherein the soft curving protrusion is attached on the outer surface of the curving lid by injection molding. 
   
   
       5 . The hula hoop of  claim 1 , wherein the soft curving protrusions are made of the thermoplastic rubber (TPR). 
   
   
       6 . The hula hoop of  claim 1 , wherein the curving body as well as the curving lid are made of Polypropylene (PP). 
   
   
       7 . A hula hoop, comprising:
 multiple curving bodies having an inserting piece at one end and an inserting aperture at other end; at least one positioning column and one fixing plug are provided at the inner portion of the inserting piece and the inserting aperture, respectively, wherein a positioning aperture is defined in the positioning column; in addition, both ends of the curving body further comprising a first aperture and second aperture, and a buckle is provided inside of the first aperture, and a spring piece is installed on the side of the buckle which has not passed through the first aperture;   multiple curving lids having multiple hollow portions; and at least one assembling plug and one fixing column are provided at the inner side of the curving lids, wherein a positioning aperture is defined in the fixing column; every curving lid comprises a soft curving protrusion attached to the outer surface of the curving lid, and the curving protrusion corresponds to the hollow portions of the curving lid; additionally, the assembling plug of the curving lid is plugged and positioned into the positioning aperture of the positioning column, and the fixing plug of the curving body is also plugged and positioned into the positioning aperture of the fixing column;   all curving bodies that combines with curving lids are connected to one another, i.e., the inserting piece of one curving body is inserted into the inserting aperture of another curving body; the buckle of the inserting piece is squeezed elastically, allowing the inserting piece of one curving body to be inserted into the inserting aperture of another curving body; when the first aperture with the buckle has moved to the position of the second aperture of another curving body, the buckle is ejected and buckled to the second aperture elastically, forming a circular hula hoop.   
   
   
       8 . The hula hoop of  claim 7 , wherein one side of the inserting piece further defines a first positioning ridge, and the other side further defines a second positioning ridge; correspondingly, the one side of the inner wall of the inserting aperture also defines a first positioning chute which corresponds to said first positioning ridge, and the other side of the inner wall defines a second positioning chute which corresponds to said second positioning ridge; when the inserting piece of one curving body is inserted into the inserting aperture of another curving body, the first positioning ridge is locked with the first positioning chute, and the second positioning ridge is locked with the second positioning chute. 
   
   
       9 . The hula hoop of  claim 7 , wherein the positioning aperture of the positioning column further comprises a first positioning aperture and a second positioning aperture, and a stopper provided between the first positioning aperture and second positioning aperture; when the assembling plug of the curving lid is plugged into the second positioning aperture, a fastener is provided to screw onto the first positioning aperture and the stopper, affixing them to the assembling plug of the curving lid. 
   
   
       10 . The hula hoop of  claim 7 , wherein the soft curving protrusion is attached on the outer surface of the curving lid by injection molding. 
   
   
       11 . The hula hoop of  claim 7 , wherein the curving protrusions are made of the thermoplastic rubber (TPR). 
   
   
       12 . The hula hoop of  claim 7 , wherein the curving body as well as the curving lid are made of Polypropylene (PP).