Chest-expanding exercising device

Abstract

The invention discloses a chest-expanding exercising device. The chest-expanding exercising device comprises a base and lower connecting clamping tracks, wherein on a support post, the part between two limiting plates is rotatably connected with two force arms through a rotating rod I and a rotating rod II, the lower connecting clamping tracks are fixed to the tail ends of the two force arms, a pass-through groove is arranged in one side, far away from insertion holes, of each lower connecting clamping track, a plurality of positioning holes are arranged at the position, at the outer side of the pass-through groove, on each lower connecting clamping track, upper connecting clamping tracks are fixed to the top end of the support post through cross arms, connecting blocks are in sliding connection in the upper connecting clamping tracks and the lower connecting clamping tracks, springs are arranged in inside cavities of the connecting blocks, the springs sleeve insertion shafts, baffle plates are fixed at the positions, in the cavities of the connecting blocks, of the insertion shafts, a positioning pin is fixed to each insertion shaft, and extension springs are fixed among the connecting blocks. The upper connecting clamping rails and the connecting blocks are matched for rapidly replacing the extension springs, and then the tension of the force arms is adjusted for adapting tothe demands of different people.

Description

technical field [0001] The invention belongs to the technical field of body-building equipment, and in particular relates to chest-expanding body-building equipment. Background technique [0002] Most of the rotating force of the force arm of the existing chest expander is fixed, and the adjustable force of the chest expander is more troublesome and difficult to operate when increasing or decreasing the stretch spring. Therefore, a chest expander fitness equipment is proposed to solve the above problems necessary. Contents of the invention [0003] The object of the present invention is to provide a chest expanding fitness equipment to solve the problems raised in the above-mentioned background technology. [0004] In order to achieve the above object, the present invention provides the following technical solutions: a chest expansion fitness equipment, including a base and a lower connecting rail, a telescopic rod is fixed on the base, a seat cushion is fixed on the tele...

AI Technical Summary

Problems solved by technology

[0002] Most of the rotating force of the force arm of the existing chest expander is fixed, and the adjustable force of the chest expander is more troublesome and difficult to operate when increasing or decreasing the stretch spring. Therefore, a chest expander fitness equipment is proposed to solve the above problems necessary

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