Chest expander capable of automatically reducing balance weight

Abstract

The embodiment of the invention discloses a chest expander capable of automatically reducing balance weight. The chest expander comprises a main cover body, a balance weight box body located on the lower side of the main cover body and a balance weight pin located in the balance weight box body. A motor is fixedly arranged in the main cover body, and the main cover body is fixedly connected with the balance weight box body; a plurality of balance weights which are continuous up and down are arranged in the balance weight box body, and balance weight pin cavities which are through up and down are formed in the balance weights; the balance weight pin penetrates through all the balance weight pin cavities, an adjusting rod is arranged in the balance weight pin, and a driving adjusting block is fixedly connected to the tail end of the lower side of the adjusting rod. According to the chest expander disclosed by the invention, whether the physical strength of a body builder is reduced or not is judged by detecting the contact times of the balance weight and the contact counter through the contact counter, and after the physical strength of the body builder is reduced, in the rest process of the exerciser, the active adjusting block is pulled through the adjusting rod to lighten the balance weight, on one hand, the problem of muscle strain caused by excessive exercise of the exerciser is avoided, and on the other hand, certain exercise time can be shortened or the rest time in the exercise can be avoided and shortened through automatic adjustment.

Description

technical field [0001] The embodiments of the present invention relate to the technical field related to fitness equipment, and in particular to a tensioner that can automatically lighten the counterweight. Background technique [0002] Stretchers are common fitness equipment in gyms. Nowadays, most stretchers cannot accurately judge the decline in the physical strength of the bodybuilder when they are used. When the physical strength of the bodybuilder declines, when doing the next set of exercises, it may be caused by excessive exercise. The hidden danger of muscle strain, on the other hand, if you want to adjust the counterweight after physical strength declines, you need to manually adjust it, which may increase a certain amount of exercise time or reduce the rest time during exercise. Contents of the invention [0003] Therefore, the embodiment of the present invention provides a tensioner that can automatically reduce the counterweight, which solves the problems that...

AI Technical Summary

Problems solved by technology

[0003] Therefore, the embodiment of the present invention provides a tensioner that can automatically reduce the counterweight, which solves the problem that the tensioner cannot judge whether the physical strength of the bodybuilder has declined and cannot automatically adjust the counterweight

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