Hula hoop with rotary balls

#1. Field of the Invention

#The present invention relates to a hula hoop, used for doing exercises so as to lost one's fat and build one's body.

#2. Description of the Related Art

#FIG. 1 is a schematic view of a conventional hula hoop.

#FIG. 2 is a perspective view of the present invention.

#FIG. 3 is a schematic view of the arc units of the invention.

#As shown in FIG. 2, a perspective view of the present invention, the most obvious difference between a collar body (A) of the present invention and the prior art lies in that a plurality of rotary balls (90) are set in the arc body on the inner side of the hoop. The present invention has some corresponding are units mono-block molded of plastics which can be pivoted and assembled to form a hoop. It takes more time to assemble a finished product, but it only needs a mode much smaller in size so that it can be less costly to produce.

#According to assemblage concept on non-monoblock molding, the assemblage of the present invention, as shown in FIG. 3, is to connect and combine 4 pairs of corresponding arc units (A1, A2) to form a hoop, as shown in FIG. 4, a plurality of rotary balls are respectively disposed in each pair of arc units (A1,A2). Its structure in detail is shown in FIG. 5, one of the corresponding arc units (A1) has a fastening hook (10) on its inner wall and the other one (A2) has an insertion hook (20) at its corresponding position on its inner wall, when these two corresponding arc units (A1, A2) are firmly fastened and combines, they become an arc frame (1); in order to connect four arc frames (1) to form a round collar body (A), each arc frame (1) has a tenon (30, 31) and mortise (40, 41) at its either end respectively; moreover, the tenon (30, 31) has a hook slot (301, 311) on it and the mortise (40, 41) has a hook chisel (401, 411) on it so as to position and fasten the arc bodies so firmly with each other that they will not be easily taken apart. The present invention has a plurality of undulated arc structures (50) on the inner side of the arc frame (1) combined by a pair of corresponding arc units (A1,A2) and the arc body (1) has a ball slot (60, 61) to accommodate the rotary ball (90), the column (70) in the ball slot (60) in the arc unit (A2) can penetrate a penetration hole (91 ) in the rotary ball (90) so that the ball can rotate between the column (70) of unit (A2) and the column slot (80) of the unit (A1).

#The present invention uses combination arc units (A1,A2) of small size to combine and connect firmly together to form a hula hoop of large size; so it needs no mode in large size and can save much cost. And it can provide a great variety of colors and designs by arc units in different color and design so that the consumer may have many choices. The combination structure of the present invention has a plurality of rotary balls (90) disposed in the undulating inner surfaces of the arc frames (1), the balls can increase the rotation fluency when the hula hoop rotates on one's waist or hip and can provide a massage function on one's body.