BACKGROUND OF THE INVENTION 1. Fields of the Invention
The invention relates to a control mechanism of an electric treadmill, and more particularly, to a mechanism that ensures an easy control of the rotational speed of a running belt as well as a practical adjustment of the inclination of a tread base without distracting the attention of the operator.
2. Description of the Related Art
The electric treadmill provides an optimal simulation of walking movement so that it becomes more and more popular and is one of the important indoor exercise devices. Moreover, the treadmill allows an easy control of the rotational speed of a running belt and a practical adjustment of a tread base. The relevant techniques belong to the prior art so that no further descriptions thereto are given hereinafter.
The control of the rotational speed of the running belt and the adjustment of the tread base is often done either by the operation keys on an electronic console or by the touch switches on handle bars. However, the operation keys and the touch switches are often so small and far away from the operator that the operator has to be concentrated to locate the operation keys and the touch switches when he wants to execute the adjustment. In other words, the operator has to avoid false input while keeping up with the speed of the running belt during the exercise session, and this would pose a hazard to the operator.
SUMMARY OF THE INVENTION A primary object of the invention is to avoid the above-mentioned drawbacks and to provide a control mechanism of an electric treadmill that ensures an easy control of the rotational speed of a running belt as well as a practical adjustment of the inclination of a tread base without distracting the attention of the operator.
In order to achieve the above-mentioned object, a large area pressure strip is located on each of handles of the treadmill while a touch switch is disposed under the pressure strip. The touch switch is electrically connected to an electronic console either for an easy control of the rotational speed of a running belt or for a practical adjustment of the fold-up inclination of a tread base.
BRIEF DESCRIPTION OF THE DRAWINGS The accomplishment of this and other objects of the invention will become apparent from the following description and its accompanying drawings of which:
FIG. 1 is a perspective view of a preferred embodiment of the invention;
FIG. 2 is a cutaway view of a handle and a pressure strip of the preferred embodiment ofFIG. 1
FIG. 3 is a cutaway view of the handle and the pressure strip of the preferred embodiment ofFIG. 1 after a force acts on the pressure strip;
FIG. 4 is a cutaway view of the handle and the pressure strip in accordance with another preferred embodiment of the invention
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT Referring toFIGS. 1 through 3, anelectric treadmill10 in accordance with a preferred embodiment of the invention includes asupport base11, twohandles12, anelectronic console13, atread base14, arunning belt15 andbottom support elements16. Thetread base14 can be driven by a lifting motor (not shown) to create change of supporting inclination. Therunning belt15 is driven by another motor (not shown) for an in-place rotation. Each of thehandles12 is provided with at least one largearea pressure strip20 under which atouch switch22 is disposed. Thetouch switch22 is electrically connected to theelectronic console13 either for an easy control of the rotational speed of therunning belt15 or for a practical adjustment of the fold-up inclination of thetread base14.
The operation will be described by use of a simple example as follows. For example, a command of acceleration can be given to the motor for therunning belt15 via theelectronic console13 when thepressure strip20 on onehandle12 is compressed to trip thetouch switch22. Meanwhile, the corresponding elements on theother handle12 are designed for the deceleration command. Thepressure strip20 occupies such a large space that the operator can easily reach one of thepressure strips20 for a desired action of the treadmill.
Of course, aspring element24 is interposed between thepressure strip20 and thehandle12 for resetting thepressure strip20 to its original position after removal of an external force on thepressure strip20.
Alternatively, thepressure strips20 on thehandles12 and theassociated touch switches22 can be designed for controlling the lifting motor to adjust the inclination of thetread base14. This belongs to a prior art so that no further descriptions are given hereinafter.
As shown inFIG. 4, a T-shaped pressure strip30 can be employed in cooperation with twotouch switches22. In this way, the T-shaped pressure strip30 can be compressed at both sides thereof while bothtouch switches22 are correspondingly designed both for acceleration or deceleration and for fold-up or fold-down action. Thus, the operator can install on bothhandles12 of theelectric treadmill10 two sets of control units for adjusting the operation speed of therunning belt15 and the inclination of thetread base14. As a result, the application value of the treadmill can be enhanced.
Many changes and modifications in the above-described embodiment of the invention can, of course, be carried out without departing from the scope thereof. Accordingly, to promote the progress in science and the useful arts, the invention is disclosed and is intended to be limited only by the scope of the appended claim.