Elliptical exercise machine with adjustable exercising orbit

Abstract

An elliptical exercise machine with adjustable exercising orbit substantially comprises a framework, an upright support disposed thereon, a flywheel disposed inside the upright support, a crank settled on the flywheel, at least two parallel rails arranged adjacent said framework, a wheel means comprising two wheel-shafts arranged on each side of said crank and each has a wheel which is coupled to said rail, a handle-shaft means comprising a pair of handle-shafts disposed on each side of the upright support with the top portions for users' handling, a running-pedal means comprising two pedals respectively coupled to two pedal-shafts which are linked to said handle-shafts for users' pedaling, a pair of adjust-devices on the wheel-shafts which are pivotally connected to the pedal-shafts for adjust the position of joints of pedal-shafts and wheel-shafts by moving axially along the wheel-shafts forwards and backwards. A user can modify the exercise model for training various muscle systems by operating said adjust-devices to lengthen or shorten the minor axle of the resultant elliptical exercising orbit to cause a non-uniform scale thereof.

Description

BACKGROUND OF THE INVENTION

1. Field of the Invention

This invention is related to an elliptical exercise machine, and, more particularly, to an elliptical exercise machine with a mechanism for lengthening or shortening the minor axle of the elliptical exercising orbit thereof in order to cause a non-uniform scale of the resultant elliptical exercising orbit and thereby allows a user to modify the exercise model for training various muscle systems.

2. Description of the Related Art

A conventional elliptical exercise machine generally provides an exercise manner of pedaling on pedals, which reciprocate along a fixed elliptical orbit, and the exercise strength may be modified by adjusting the resistance acting on a flywheel thereof. As the exercising orbit is fixed, such a machine can only helps to practice relatively limited muscle systems even though a modifiable exercising strength is available. Furthermore, the exercise model is also approximately constant. It is possible to adapt an elliptical exercise machine with adjustable exercising orbit to train muscle strength of lower extremities and muscle endurance beyond cardiopulmonary function by way of changing the exercising orbit thereof.

Features of popular elliptical exercise machines with adjustable exercising orbit are mainly focused on adjusting step length by uniformly scaling the entire exercising orbit or modifying the inclination by changing the gradient of the entire exercising. Thus, a need of an elliptical exercise machine with the exercising orbit non-uniformly scaleable based on the minor axis for change the exercising orbit significantly therefore exists.

SUMMARY OF THE INVENTION

The primary objective of the present invention is to provide an elliptical exercise machine having adjustable exercising orbit, wherein the wheel-shafts thereof each has an adjust-device associated with each of the two pedal-shaft. By means of said adjust-devices, the position of the joints of the pedal-shafts and wheel-shafts can be axially shifted by moving along the rails forwards and backwards, and in turn lengthen or shorten the minor axle of the elliptical exercising orbit to cause a non-uniform scale thereof. Thereby the purpose of modifying the exercise model and training various muscle systems is achieved.

The technical measures taken by the invention to achieve foregoing purpose and effect are given below:

An elliptical exercise machine with adjustable exercising orbit substantially comprises:

a framework, which includes an upright support mounted on a longitudinal base member and said upright support further having a flywheel inside, a crank settled on the flywheel , and at least two parallel rails arranged along said longitudinal base member,

a wheel means comprising two wheel-shafts arranged on each side of said crank and each has a wheel which is coupled to each of said rails respectively;

a handle-shaft means comprising a pair of handle-shafts disposed on each side of the upright support with the top portions for users' handling;

a pedal-shaft means comprising two pedals respectively coupled to two pedal-shafts which are linked to said handle-shafts respectively for users' pedaling;

A pair of adjust-devices, pivoted on the pedal-shafts respectively, which are provided to shift the position of joints of pedal-shafts and wheel-shafts by moving along the rails forwards and backwards.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view of an embodiment according to the present invention.

FIG. 2 is an exploded view of the wheel-shafts according to the present invention.

FIG. 3 is a perspective view of a wheel-shaft according to the present invention.

FIG. 4 is one of the schematic drawings showing the movement of the present invention.

FIG. 5 is another schematic drawing showing the movement of the present invention.

FIG. 6 is a schematic drawing showing the movement implemented on a wheel-shafts according to the present invention.

FIG. 7 is further another schematic drawing showing the movement of the present invention.

FIG. 8 is an exploded view of a wheel-shaft according to another embodiment of the present invention.

FIG. 9 is a perspective view of a wheel-shaft according to the second embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

As shown in FIG. 1 to 3, an elliptical exercise machine with adjustable exercising orbit according to the present invention comprises:

a framework 10, which includes an upright support 12 mounted on a longitudinal base member 11 and said upright support 12 further having a flywheel 13 inside, a crank 131 settled on the flywheel 13, a drag 14 provided below the flywheel 13 to be coupled therewith for controlling the resistance thereto; and the longitudinal base member 11 which extends rearward comprising at least two parallel rails 15 thereon;

a wheel means 20 comprising at least two wheel-shafts 21 which are cannular tubes and disposed on each side of said crank 131 further respectively connected to two retainers 211 which are coupled to bodies of the wheel-shafts 21 at one end thereof; wherein, a adjust-device 22 equipped with a power source 221 which may be an electric motor provided on each wheel-shaft 21, an extendable rod 222 inside each wheel-shaft 21 having a connection with said power source 221, a fixed component 223 provided at one end of each extendable rod 222, a long-slotted hole 212 arranged on at least one side of each wheel-shaft 21, a pin 224 transversely penetrating through said long-slotted hole 212 and fixed component 223 thereby the power source 221 drives the joint fixed component 223 and pin 224 axially shift along each wheel-shaft 21; a wheel 23 provided on the other end of each wheel-shaft 21 for engaged with each foresaid rail 15;

a handle-shaft means 30 comprising a pair of handle-shafts 31 disposed on each side of the upright support 12 and a pair of handles 32 provided respectively whereon for users' handling;

a stepping-pedal means 40 comprising two pedals 42 respectively coupled with two pedal-shafts 41 wherein the ends near the handle-shafts 31 are pivoted on said pins 224, wherein a pair of pedals 42 disposed on the ends of two pedal-shafts 41 respectively for users' stepping;

Referring to FIG. 3 and 4, the handle-shafts 31, pedal-shafts 41, wheel-shafts 21, crank 131 and flywheel 13 are pivotally joint with each other to form a linkage mechanism. When taking exercise with an elliptical exercise machine of the present invention, a user may step on the pedals 42 and grip the handles 32. For instance, he may step his right foot rearward, while his right arm pushes the handle-shaft 31 forward simultaneously to drive the corresponding wheel 23 moving rearward along the rail 15. Thereagainst, when the user steps his right foot forward, and his right arm pulls the handle-shaft 31 rearward, the corresponding wheel 23 moves forward along the rail 15. Continuing foregoing actions, the user makes the pedals 42 moving reciprocally to compose the movement along the major axis of an elliptical exercising orbit.

Meantime, the connection between the wheel-shafts 21 and the crank 131 conducts rotation of the flywheel 13 and pivotal swing of the wheel-shafts 21 upon the pin 24 to compose the movement along the minor axis of an elliptical exercising orbit. Combining this and foregoing movement along the major axis, an elliptical exercising orbit is therefore composed.

When modifying the exercising orbit is desired, a user may drive the power sources 221 to shorten the extendable rods 222 and in turn bring the joints of the pin 224 and pedal-shafts 41 axially sliding toward the retainers 211 (as shown in FIG. 6). This finally results the ends of pedal-shafts 41 raised. Also, since the distance between the pin-pedal-shaft joint and the crank 131 shortens, the minor axis of the resultant elliptical exercising orbit correspondingly enlarges, and thus the resultant elliptical exercise is adapted to training some other muscle systems;

On the contrary, when the user drives the power sources 221 to extend the extendable rods 222 and in turn the distance between the pin-pedal-shaft joint and the crank 131 extends. It causes the minor axis of the resultant elliptical exercising orbit to shorten.

Furthermore, according to another embodiment of the present invention as shown in FIG. 8, a wheel means 50 comprises at least two wheel-shafts 51 which are coupled with each end of the crank 131 and further connected to each wheel-shaft 51 is a adjust-device 52 having a plurality of through holes 53 arranged in a row; wherein the adjust-device 52 further includes a pin 54 which movably pierce into the pedal-shaft 41;

When it is desirous for a user to modify the exercising orbit, it is possible to change the length of the minor axis of the resultant elliptical exercising orbit by removing the pedal-shaft 41 and then lifting the pin 54 for re-coupling it to another desired through hole 53.

While the invention has been described by way of example and in terms of two preferred embodiments, it is to be understood that the invention is not limited thereto. To the contrary, it is intended to cover various modifications and similar arrangements and procedures, and the scope of the appended claims therefore should be accorded the broadest interpretation so as to encompass all such modifications and similar arrangements and procedures.

Claims

1. An elliptical exercise machine with adjustable exercising orbit comprising: a framework, including a longitudinal base member combined with an upright support, a flywheel disposed in said upright support, a crank is disposed on the flywheel, at least two parallel rails arranged along said longitudinal base member; a wheel means composed by two wheel-shafts arranged on each end of the crank and each having a wheel which is engaged with each of said rails respectively; a handle-shaft means comprising a pair of handle-shafts disposed on each side of the upright support and the top portions of the handle-shafts provided for users' griping; a pedal-shaft means comprising two pedals respectively coupled to two pedal-shafts which are linked to said handle-shafts respectively for users' pedaling; a pair of adjust-devices pivotally connected to the pedal-shafts respectively, which are provided to shift the position of joints of pedal-shafts and wheel-shafts by moving along the rails forwards and backwards; The exercising orbit of the claimed elliptical exercise machine is non-uniform scaleable against the minor axis thereof by means of shifting the position of the joints of the pedal-shafts and wheel-shafts.

2. The elliptical exercise machine with adjustable exercising orbit as claimed in claim 1, wherein, the wheel-shafts are cannular and the adjust-devices each comprise an axially expandable rod arranged in each said wheel-shaft.

3. The elliptical exercise machine with adjustable exercising orbit as claimed in claim 2, wherein, each adjust-device comprises a power source settled on the wheel-shaft for driving said expandable rod therein

4. The elliptical exercise machine with adjustable exercising orbit as claimed in claim 3, wherein, the power sources are electric motors.

5. The elliptical exercise machine with adjustable exercising orbit as claimed in claim 4, wherein, a fixed component is provided at the other end of each expandable rod; at least one long-slotted hole disposed on each said wheel-shaft correspondingly and a pin transversely pierces through said fixed component and long-slotted hole to pivotally connect the pedal-shaft.

6. The elliptical exercise machine with adjustable exercising orbit as claimed in claim 5, wherein, a pair of retainers are respectively disposed on each wheel-shaft at the end relative to the crank. The retainers further associate with wheel-shaft at one end.

7. The elliptical exercise machine with adjustable exercising orbit as claimed in claim 1, wherein, a drag is coupled with the flywheel thereunder for controlling the resistance to rotation of the flywheel.

8. The elliptical exercise machine with adjustable exercising orbit as claimed in claim 1, wherein, each the adjust-device includes a plurality of through holes on the wheel-shaft arranged in a row.

9. The elliptical exercise machine with adjustable exercising orbit as claimed in claim 8, wherein, each said adjust-device further includes a pin movably pierces into the through holes for the pedal-shaft pivoting thereon.