Guide rail and frame of massage chair

A guide rail mounted on a frame of a massage chair and comprising:

• a support track, a seat track, and a flexible guiding assembly which are arranged along an extending path of the guide rail;
• wherein an end of the flexible guiding assembly is connected with the support track, and a second end of the flexible guiding assembly is connected with the seat track;
• wherein the flexible guiding assembly includes multiple flexible modules arranged along the extending path of the guide rail;
• wherein a gap is defined between any two adjacent flexible modules, and any two adjacent flexible modules are rotatably connected by using a rotatable connector;
• wherein a rotation axial line of the rotatable connector is perpendicular to the extending path of the guide rail, and a width of the gap is adjustable by rotating any two adjacent flexible modules to bend the flexible guiding assembly, hence an angle between the support track and the seat track is changeable wherein the flexible guiding assembly includes a hinge assembly having multiple stems connected along the extending path of the guide rail, and the hinge assembly has multiple rotary elements, wherein a respective one rotary element is connected with any two adjacent stems, and the respective one rotary element corresponds to a respective one flexible module;
• the respective one rotary element includes a first rotation part and a second rotation part, wherein the first rotation part is slidably on the respective one flexible module, and a sliding direction of the first rotation part is perpendicular to the extending path of the guide rail.