Abstract
This paper presents a swing back the design. In China, the long-term fight against the disease and patients of the total population of 15%, and sub-health crowd of the total population of 70 percent, while 15 percent are inside five percent of people back disorders, 70 percent inside the 20 percent of the people waist disease. People long car and long-term, will lead to more and more patients with the disease. It has great market potential. First of all I have on the market back to the status of medical devices a preliminary understanding of the comparative advantages and disadvantages of similar products at home and abroad. And further improve their design. After According to the design parameters for a selected group of four sides parallel to the seven member Advisory bodies zoom-as the main structural and mechanical components, such as the size of parts, vibration systems in the design selected to provide the cyclical movement of inertia vibration , Waist and the fixed position of the selected structure, the location of choice and motor deceleration devices, and the size of gear, modulus, teeth; zoom-zoom ratio and the zoom ratio adjustment; Motors models; shock increases, Frequencies, and so on a specific analysis and calculations. Finally, the special individual to do the structural design details, such as the slowdown in the choice and positioning devices, and so on.
Keywords：Waist tilting mechanism Release lever reproduce by pantograph organization Decelerating device Vibration installment
