| 摘要 |
<p>A safety dyna-bender comprises a centre cord (4) with considerable flexibility and proper length installed in the hollow section of a dyna-bender through the coupling of a pair of cup-shaped positioning anchors (23, 33), which are respectively disposed at each end of the handle pipes (2, 3) rigidly connected to the steel spring coil (1). The arrangement of the centre cord (4) and the cup-shaped positioning anchors (23, 33) within the structure of the dyna-bender provides a safety assurance in protecting the user against any unexpected accidents resulting from either the breaking f the steel spring coil (1) or the sudden loose of the handle pipes (2, 3) of the dyna-bender during exercise.</p> |
