Elliptical exerciser capable of adjusting stride length

An elliptical exerciser capable of adjusting a stride length contains: frame, a transmission device, a crank mechanism, and an adjustable movement unit. The transmission device is connected on the pedestal and includes a pulley. The crank mechanism is coaxial with the pulley of the transmission device and is rotatably connected on the frame. The adjustable movement unit is rotatably connected on the frame and is coupled with the transmission device via the crank mechanism. The adjustable movement unit includes two four-connection-rod assemblies which are located on two sides of the frame, and a respective four-connection-rod assembly of the adjustable movement unit has an adjustment lever, a post, a manual swing lever, and a horizontal joining rod. The adjustment lever has multiple rotatable connection points which are spaced, and the manual swing lever is rotatably connected on the frame.

FIELD OF THE INVENTION

The present invention relates to an elliptical exerciser capable of adjusting stride length, and more particularly to the elliptical exerciser which is capable of adjusting the foot movement trajectory and the stride length of the pedal.

BACKGROUND OF THE INVENTION

Although the nature of indoor sports equipment is different from outdoor sports, at this stage, various indoor sports equipment in different fields can demonstrate the training of various muscles of the body, so that consumers can perform physical training even at home or indoors to achieve fitness or for the purpose of rehabilitation. Therefore, indoor sports equipment has been widely preferred by consumers, such as sports treadmills, steppers, rowing machines, exercise bikes, etc., which are commonly used by consumers. And for indoor sports equipment in recent years, with the continuous innovation of the old and the new, a sports machine that can form a trajectory is widely loved by general consumers.

However, the exercise machine basically still has the function of training physical fitness, but the trajectory formed by the conventional exercise machine during exercise is only a single type, and its trajectory cannot be adjusted, and when using the existing exercise machine, the user must match the footsteps with the gait trajectory of the exercise machine. If the gait trajectory of the exercise machine is poorly designed, it will easily lead to muscle soreness and long-term accumulation of sports injuries.

SUMMARY OF THE INVENTION

The primary aspect of the present invention is to provide an elliptical exerciser by which the second rotatable fixing segment of the horizontally fixing rod and the adjustment lever of the adjustment unit is adjustable so that the first horizontal distance defined by the elliptical-like movement path changes, and the manual swing lever rotates along the rotatable connecting point of the manual swing lever, wherein the arcuate swing length of the third rotatable fixing segment of the horizontal fixing rod and the bottom segment of the manual swing lever changes so as to adjust the foot movement trajectory and the stride length of the pedal.

Further aspect of the present invention is to provide an elliptical exerciser by which the movement trajectory of the pedal is the elliptical-like movement path when stepping the pedal, wherein the elliptical-like movement path has the upper plane section and the lower arcuate section, thus decreasing sport injury and obtaining ergonomics and exercising safety.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

With reference toFIGS.1-5, an elliptical exerciser capable of adjusting a stride length according to a first embodiment of the present invention comprises: a frame1, a transmission device2, a crank mechanism3, and an adjustable movement unit4.

The frame1includes a pedestal10, a first fixing rod11and a second fixing rod12which are mounted on two ends of the pedestal10, a first column13extending upward from one of the two ends of the pedestal10proximate to the first fixing rod11, a second column14extending upward from a middle section of the pedestal10, and a control member15fixed on a top of the second column14, wherein the control member is a dashboard or an electronic panel. The pedestal10further includes two stems16extending symmetrically outward from the second column14below the control member15, and two handrails17connected on and extending upward from two sides of the second fixing rod12of the pedestal1and defined among the two stems16and the second fixing rod12.

The transmission device2is connected on the frame1and includes a pulley21, a belt22, and a steel wheel23, wherein the pulley21is mounted on a top of the first column13of the pedestal1, and the first column13has a rotatable connection seat131disposed thereon beside the steel wheel23and below the pulley21, wherein the belt22is fitted on the pulley21and a pillar of the steel wheel23.

The crank mechanism3includes a coupling shaft30coaxial with the pulley21of the transmission device2and is rotatably connected on the first column13of the frame1, wherein a first end of the coupling shaft30is rotatably connected on a first end of a first crank arm31, a second end of the first crank arm31is rotatably connected with a first bolt311, a second end of the coupling shaft30is rotatably connected on a first end of a second crank arm32, and a second end of the second crank arm32is rotatably with a second bolt321.

The adjustable movement unit4is rotatably connected on the frame1and is coupled with the transmission device3via the crank mechanism3. The adjustable movement unit4includes two four-connection-rod assemblies which are located on two sides of the frame1, wherein a respective four-connection-rod assembly of the adjustable movement unit4has an adjustment lever41, a post42, a manual swing lever43, and a horizontal joining rod44. Taking the adjustable movement unit4rotatably connected on the second bolt321of the crank mechanism3for example, as shown inFIG.2, a top of the adjustment lever41is rotatably connected on the second bolt321of the crank mechanism3, and a bottom of the adjustment lever41is coupled with a first end of the post42, wherein the adjustment lever41has three rotatable connection points411,412,413which are spaced, and the manual swing lever43is rotatably connected on the two stems16of the frame1, wherein the manual swing lever43are defined to a top segment431and a bottom segment432by using a rotatable connecting point C of the manual swing lever43, and the bottom segment432is connected to a second end of post42. As illustrated inFIG.2, the bottom segment432is connected to an intermediate section421of the post42, and a connection portion of the bottom segment432and the intermediate section421is a first rotatable fixing segment P4, wherein the post42has a pedal423connected on a distal segment422thereof, a first end of the horizontal joining rod44is rotatably connected on one of the three rotatable connection points411,412,413of the adjustment lever41, a connection portion of the first end of the horizontal joining rod44and one of the three rotatable connection points411,412,413is defined as a second rotatable fixing segment P, and a second end of the horizontal joining rod44is rotatably connected on a middle section of the bottom segment432of the manual swing lever43, wherein a connection portion of the second end of the horizontal joining rod44and the middle section of the bottom segment432is defined as a third rotatable fixing segment P0.

With reference toFIGS.3-5, when stepping the pedal423, a movement trajectory Y of the pedal423is an elliptical-like movement path (as shown inFIG.3), wherein the elliptical-like movement path Y has an upper plane section and a lower arcuate section, thus decreasing sport injury and obtaining ergonomics and exercising safety. When stepping the pedal423and gripping the top segment431of the manual swing lever43, the horizontal joining rod44actuates the adjustment lever41to drive the crank mechanism3to rotate, and the crank mechanism3actuates the pulley21of the transmission device2to revolve, such that the steel wheel23is driven by the belt2to enhance a stepping resistance, as shown inFIG.3, wherein the second bolt321of the crank mechanism3rotates along the coupling shaft30, a length of the second crank arm32of the crank mechanism3is a length R which is defined as a rotation radius length R, a circle rounding trajectory of the second bolt321is a circular moving trajectory, and a horizontal distance of the circle rounding trajectory of the second bolt321is a diameter length2R. When the first end of the horizontal joining rod44is rotatably connected on the one of the three rotatable connection points411,412,413of the adjustment lever41, the second rotatable fixing segment P of the first end of the horizontal joining rod44and the adjustment lever41is actuated by the crank mechanism3to produce the elliptical-like movement path, wherein a first horizontal distance H defined by the elliptical-like movement path is more than the horizontal distance2R of the circle rounding trajectory of the second bolt321, and the adjustment lever41drives the bottom segment432of the manual swing lever43via the horizontal joining rod44so that the third rotatable fixing segment P0of the horizontal joining rod44and the bottom segment432of the manual swing lever43rotates along the rotatable connecting point C of the manual swing lever43to produce an arcuate movement trajectory. When desiring to adjust a foot movement trajectory, the second rotatable fixing segment P of the first end of the horizontal joining rod44and the adjustment lever41is adjustable so as to change the first horizontal distance H defined by the elliptical-like movement path, wherein the manual swing lever43rotates along the rotatable connecting point C of the manual swing lever43, an arcuate swing length W of the third rotatable fixing segment P0of the horizontal joining rod44and the bottom segment432of the manual swing lever43changes so as to adjust the foot movement trajectory and the stride length of the pedal423.

Referring toFIGS.3and4, when the second rotatable fixing segment P of the first end of the horizontal joining rod44and the adjustment lever41is located on a highest rotation point P1of the adjustment lever41, the second rotatable fixing segment P on the highest rotation point P1produces a second horizontal distance H1defined by the elliptical-like movement path, and the second horizontal distance H1is shortest so that the third rotatable fixing segment P0, a second arcuate swing length W1of the third rotatable fixing segment P0of the horizontal joining rod44, the post42, and the manual swing lever43is shortest, and a third arcuate swing length W2of the first rotatable fixing segment P4is shortest, wherein the movement trajectory Y of the pedal423is a first closed circle rounding trajectory Y in a small distance. When the second rotatable fixing segment P of the horizontal joining rod44and the adjustment lever41is located on a lowest rotation point P2of the adjustment lever41, as shown inFIG.5, the second rotatable fixing segment P on the lowest rotation point P2produces the elliptical-like movement path, and a third horizontal distance H2defined by the elliptical-like movement path is longest so that a fourth arcuate swing length W3of the third rotatable fixing segment P0of the horizontal joining rod44, the post42, and the manual swing lever43is longest, and a fifth arcuate swing length W4of the first rotatable fixing segment P4is longest, wherein the movement trajectory Y of the pedal423is a second closed circle rounding trajectory Y2in a large distance, highest movement tension, and maximum intensity.

With reference toFIGS.6and7, a difference of a second embodiment of the elliptical exerciser from that of the first embodiment comprises: the bottom segment432of the manual swing lever43being connected to the distal segment422of the post42, wherein a connection portion of the bottom segment432of the manual swing lever43and the distal segment422of the post42is a second rotatable fixing segment P5, thus decreasing sport injury and obtaining ergonomics and exercising safety.

Thereby, the second rotatable fixing segment P of the horizontal joining rod44and the adjustment lever41of the adjustment unit4is adjustable so that the first horizontal distance H defined by the elliptical-like movement path changes, and the manual swing lever43rotates along the rotatable connecting point C of the manual swing lever43, wherein the arcuate swing length W of the third rotatable fixing segment P0of the horizontal joining rod44and the bottom segment432of the manual swing lever43changes so as to adjust the foot movement trajectory and the stride length of the pedal423. When stepping the pedal423of the elliptical exerciser, the movement trajectory Y of the pedal423is the elliptical-like movement path, wherein the elliptical-like movement path Y has the upper plane section and the lower arcuate section, thus decreasing sport injury and obtaining ergonomics and exercising safety.