Patent ID: 6974426

Claim:
A massaging structure with a buffer function comprising: a frame combined with a massaging chair or bed, having a micro switch fixed at an upper side of said frame and another micro switch fixed at a lower side of said frame; a threaded rod disposed vertically in said frame, said threaded rod having an upper end fixed with the upper side of said frame and a lower end fixed with the lower side of said frame, said threaded rod further having a non-threaded section formed in an upper end section and a lower end section, a coil spring fitting respectively around said two non-threaded sections, each said coil spring positioned between two spring supporters to be limited in its position for holding an extremely good buffer function; a motor provided to rotate said threaded rod clockwise and counterclockwise and electrically connected with said two micro switches and activated by said micro switches to reverse its rotating direction; a moving member combined with a massaging roller and threadably engaging with said threaded rod and moved up and down by said threaded rod when said threaded rod is rotated clockwise and counterclockwise by said motor, said moving member touching and turning on one of said micro switches when it reaches the highest point or the lowest point of said threaded rod while moving up or down; said massaging roller fixed with said moving member, and rotating and massaging the back of a user while moving up and down with said moving member; and whereby in case of a malfunction of said micro switches or said motor so that said moving member cannot reverse its moving direction, one of said coil springs contacting and being compressed by said moving member to shorten and lengthen its length causing said moving member to jump up and down, thereby allowing the user to be aware that said messaging structure having a malfunction and accordingly correct it, thus threads of said threaded rod and of said moving member can be protected from damaging and reduced in its wear and tear.