1. Field of Invention
The invention relates to folding step exercisers and more particularly to such a folding step exerciser having a pivotal upright which can be folded to a horizontal position after threadably unfastening.
2. Description of Related Art
A well known folding step exerciser is shown in
However, the fastening of the socket 21 and the upright 22 is not reliable. In fact, it tends to loosen after a short period of time of use. As a result, the handlebars 23 may vibrate significantly during use. And in turn, the user may feel a degree of discomfort. Moreover, when not in use, a user has to use a tool to unfasten the bolt and nut prior to detaching both the upright 22 and the handlebars 23 from the base 20. This is, however a time consuming process.
Still, there have been numerous suggestions in prior patents for folding step exerciser. For example, U.S. Pat. No. 5,782,722 discloses a structure of folding collapsible step exerciser. Thus, continuing improvements in the exploitation of folding step exerciser are constantly being sought.
It is therefore one object of the invention to provide a folding step exerciser having a pivotal upright which can be folded to a horizontal position after threadably unfastening.
The above and other objects, features and advantages of the invention will become apparent from the following detailed description taken with the accompanying drawings.
Referring to
The step exerciser further comprises a hollow cylindrical upright 17, left and right handlebars 171 releasably secured to a top end of the upright 17, and a pivot 16 fixedly secured around a bottom end of the upright 17.
The pivot 16 is of U-shaped as viewed from top or bottom and comprises a rectangular front surface 161, a cavity 162 on a bottom edge of the front surface 161, two triangular side surfaces 163, and a hole 1631 at a rear pointed end of either side surface 163.
A bolt 18 is driven through one hole 1631, the tube 14, and the other hole 1631 to be secured by means of a nut 181. The bore of the tube 14 is sufficiently larger than the diameter of the shank of the bolt 18. That is, no interference occurs when the bolt 18 rotates in the tube 14. As a result, the upright 17 and the socket 11 are pivotably secured together.
A fastener 15 comprises a wing head 151, a tapered shank 152, and threads 153 on a rear portion of the shank 152. The shank 152 has a diameter slightly larger than a width of the cavity 162.
For mounting the upright 17 onto the socket 11, a user may simply pivot the upright 17 counterclockwise (see
When not in use, the user may first unfasten the fastener 15 by the hand until the fastener 15 is detached from both the pivot 16 and the socket 11. This technique is well known in the art. Thereafter, the user may pivot the upright 17 clockwise until the upright 17 lies horizontally on the pad 13 as shown in
While the invention herein disclosed has been described by means of specific embodiments, numerous modifications and variations could be made thereto by those skilled in the art without departing from the scope and spirit of the invention set forth in the claims.