MASSAGING PROTRUSION STRUCTURE AND HULA-HOOP USING MASSAGING PROTRUSION STRUCTURES

摘要

PURPOSE: A pressure protrusion and a hula-hoop using the pressure protrusion are provided to increase the pleasure of exercise by using the pressure protrusion made of photo-chromic material. CONSTITUTION: The spherical pressure protrusion consists of an upper hemispherical member, a lower hemispherical member coupled with the upper hemispherical member, and a fitting member on the apex portion of the lower hemispherical member to be elastically fitted in a hole of another object. The hoop is formed by using a photo-chromic material comprised of ferrinapthochioindico, dihydrofiren, alpha-2.5-dimethyl-3-furyl ethylidene, spino naptho oxazine, and spiropyran for allowing the color of the pressure protrusion to be changed according to the wavelength of sunlight. By adopting the pressure protrusion to the hula-hoop, the pleasure of exercise is able to be redoubled.