Universal roller unit for a treadmill

Abstract

A universal roller unit for a treadmill having a supporting frame and a platform. The supporting frame includes a front and a rear bar at the bottom thereof. A roller is pivotally connected to both ends of the front bar. A universal roller unit is attached to the middle part of the rear bar. When the treadmill is in a flat operational position, the universal roller unit may be attached to the side wall of the rear bar; when the treadmill is in a folded storage position, the universal roller unit may be pushed outwards to allow the universal roller to contact with the ground so that the universal roller and the rollers take the responsibility of supporting the whole weight of the treadmill and move the treadmill stably and freely in any direction.

Description

BACKGROUND OF THE INVENTION [0001] 1. Fields of the Invention [0002] The invention relates to a roller unit for a treadmill, and more particularly, to a roller unit having improved convenience in use. [0003] 2. Description of the Prior Art [0004] Rollers fitted at the bottom of treadmills are used to facilitate a smooth movement of the treadmill, thereby achieving the laborsaving effect. A typical product is disclosed in U.S. Pat. No. 5,672,140 that describes roller sets are axially and pivotably arranged at one end of the ground-touching cross bars at both sides of the bottom of the treadmill while the roller sets in storage position are not in contact with the ground. In use, the roller sets are used as a pivoting point to incline the main body of the treadmill so as to facilitate the movement of the treadmill. Although this prior art can exactly reach the expected effect, it's difficult for weak people to incline the heavy treadmill during its whole movement. Even, this could lea...

AI Technical Summary

Benefits of technology

[0007] In consideration of the above-mentioned, the inventor of the present invention thinks that the displacement of the treadmill is not a regular action. In operational position, it's not required to use the roller sets. In storage position, it's not necessarily required to shift the treadmill. As a result, partial roller sets can be stored and kept away from the ground so as to eliminate the unexpected sliding shift. In brief, all rollers are pulled out only when it's really required to displace the treadmill. It's therefore an object of the invention to provide a room for accommodating a universal roller unit at the side wall of a rear bar of the supporting frame, thereby eliminating potential drawbacks of the conventional treadmill in respect of the design and the application.

Problems solved by technology

Although this prior art can exactly reach the expected effect, it's difficult for weak people to incline the heavy treadmill during its whole movement.

Even, this could lead to an unnecessary accident.

However, this kind of structure will cause an unexpected sliding or shaking when the treadmill is operated.

As a result, the safety of the user is seriously affected and it gradually becomes extinct on the market.

However, a swinging see-saw effect will be created when the treadmill is moved on an uneven surface, thereby leading to inconvenience and difficulty of the horizontal adjustment.

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