Non circular distribution rail groove ring and multiple curve connected waist building device

Abstract

The present invention consists of two, one large and one small, sliding plates in the same style, and in the corresponding stressed points between these two sliding plates, semi-circular rail groove rings and balls between each two corresponding rings are set. On the corresponding points of these two sliding plates, one or several crank-link rods are set. When the present invention is used, the exerciser sits on the large sliding plate, maintains his head immobile and twists his waist to make the sliding plates turned right and left or maintained immobile. The present invention has compact structure and is firm and less damaged.

Description

technical field [0001] The invention relates to a leisure body-building appliance, especially a waist-healthy appliance capable of exercising the waist and abdomen of a human body safely, comfortably and conveniently. Background technique [0002] Known waist-twisting fitness seat cushion at present is the technology development and production of 93218179.1 according to the patent No. of my design in 1993. Although the seat cushion can be used for people to sit on and do waist twisting exercises, there are still some structural defects that cause the product to not be used normally. [0003] 1. Since the balls in the corresponding semicircular track groove rings on the large and small turntables of the seat cushion and their intersecting tangent points are arranged according to concentric circles and equidistant schemes, this is different from the eccentric movement of the human body's center of gravity during rotational motion. The distribution of th...

AI Technical Summary

Problems solved by technology

Although the seat cushion can be used for people to sit on it and perform waist twisting exercises, there are still some structural defects that cause the product to not be used normally.

[0003] 1. Since the balls in the corresponding semicircular track groove rings on the large and small turntables of the seat cushion and their intersecting tangent points are arranged according to concentric circles and equidistant schemes, this is different from the eccentric movement of the human body's center of gravity during rotary motion. The distribution of the force points during the exercise is inconsistent, resulting in unsteady sitting and shaking of the ball during exercise.

[0004] 2. Affected by the circular arrangement of the rail grooves, the upper and lower turntables are also made into perfect circles. In this way, the circular turntable does not match the joint surface of the human buttocks in use, and part of the user's body will be squeezed out of the turntable. , friction with other objects, not only uncomfortable, but also affect the torsion effect

[0006] 4. Since the turntable is concentrically and equidistantly arranged track groove rings, it is impossible to set more track groove rings on the circle. Because there are too few support points, when it bears a large weight pressure, the pressure on each ball unit point is too high. Large, the friction force increases, resulting in poor rotation and damage to parts

[0007] 5. Because the surface of the seat cushion is too hard, you will feel uncomfortable when you sit for a long time and twist it

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