Magnetorheological-fluid based infinite pressure-regulating body builder

Abstract

The invention relates to a magnetorheological-fluid based infinite pressure-regulating body builder which is composed of a frame, cushions, handles and a pressure damper. The pressure damper is composed of a piston rod, a shell, retaining rings, travel switches, a reset spring, pistons, electromagnetic coils and magnetorheological fluid. After the electromagnetic coils are powered, the magnetorheological fluid is instantly changed into Bingham fluid high in viscosity and low in mobility from original New ton fluid, and force hindering movement of arms is formed; the travel switches are mounted at two ends of the shell, and when the pistons on two sides move to positions near enough to touch two ends of the shell, a system is automatically powered off, and damping pressure disappears instantly; due to action of the reset spring in the middle, automatic reset of the pistons can be realized; magnetic field intensity around the magnetorheological fluid can be changed by changing the size of current, infinite change of the damping pressure can be realized, arm strength requirements of different crowds can be met, and personal characteristics of the body builder can be fully embodied.

Description

technical field [0001] The invention relates to a fitness device, in particular to a fitness device which adopts magneto-rheological fluid to generate damping pressure. Background technique [0002] With the improvement of people's living standards, fitness, bodybuilding, and sports have become an indispensable part of people's lives. Because of this, the market is full of various sports and fitness equipment with different principles and functions. The simplest is an elastic tensioner that is stretched by hand, but there are many other types of tensioners. In fact, as described in U.S. Patent No. 3,101,944 issued to Cencing on August 27, 1963, a typical exercise device includes a two-handed slider that the user pushes along a sliding surface, Thereby the user's body extends from the kneeling position to the forward position, or retreats from the forward position to the kneeling position. [0003] However, most tensioners have several disadvantages. For example, this typ...

AI Technical Summary

Problems solved by technology

For example, this type of fitness equipment has strong resilience, which will not only cause body sprains, but the results of exercise are often half the result with twice the effort, and more serious accidents will occur.

In addition, the lack of precise and fast adjustment devices to adapt to different groups of people or different operating environments is also the main shortcoming of most types of fitness equipment at present.

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