Treading exercise machine with elliptical trace

[0001] The present invention relates to treading exercise machine, and particularly to a treading exercise machine with an elliptical trace.

[0002] Prior art treading exercise machine has a feature. That is, one end of each of two treading rod is pivotally installed to one axial rod. When the two treading rods are operated, the rods moves upwards and downwards instead of moving along an elliptical trace.

[0003] Accordingly, the primary object of the present invention is to provide a treading exercise machine with an elliptical trace which comprises a base, a first pivotal shaft, a second pivotal shaft, a supporting rod, and a pair of treading rods. When the insertion shaft of the button is adjusted to position in one of the positioning hole, the arm is positioned. The treading rods move reciprocally with the treading actions of the user. If the insertion shaft of the button is inserted into another positioning hole, the moving range of the treading rods will change so as to adjust the difficulty in exercise. When the shaft of the button is adjusted to move out of the positioning hole, the arm freely moves forwards and backwards. As the pulley slides to a buckle groove at a distal end of the guide groove, by the cranks to move along a round trace, the treading rods is drive to move along an elliptical trace.

[0004] The various objects and advantages of the present invention will be more readily understood from the following detailed description when read in conjunction with the appended drawing.

[0005] FIG. 1 is an exploded perspective view showing the structure of the present invention.

[0006] FIG. 2 is an assembled cross section view of the treading rods, cranks, and pulleys of the present invention.

[0007] FIG. 3 is a schematic view showing that the present invention is used as a treading exercise machine.

[0008] FIG. 4 is a schematic view showing FIG. 5 is a schematic view showing one embodiment of the present invention.

[0009] FIG. 6 shows another embodiment of the treading rod and crank of the present invention.

[0010] FIG. 7 is a partial exploded schematic view of FIG. 6.

[0011] FIG. 8 is a partial assembled schematic view of FIG. 6.

[0012] Referring to FIGS. 1 to 5, the treading exercise machine with an elliptical trace of the present invention is illustrated. The treading exercise machine with an elliptical trace mainly includes a base 10, a first pivotal shaft 12, a second pivotal shaft 15, a supporting rod 11, a pair of treading rods 40. A front end of the base 10 has the supporting rod 11. The middle section of the supporting rod 11 is installed with the first pivotal shaft 12 which passes through the supporting rod 11 and arranged at two sides of the supporting rod 11. A top of the supporting rod 11 is installed with a control panel 13 and a handle 14. A rear end of the base 10 has a second pivotal shaft 15. A pair of swingable arms 20 are positioned at two sides of the supporting rod 11 and pivotally suspended from the first pivotal shaft 12. A pair of cranks 30 are pivotally installed from the second pivotal shaft 15. Front ends of the pair of treading rods 40 are pivotally connected to the lower ends of the arms 40, respectively.

[0013] Each side of the first pivotal shaft 12 is firmly secured with an angle adjusting plate 161 which is at the inner side of the arm 20. A lower side of the angle adjusting plate 161 is installed with a plurality of positioning holes 161. Each arm 20 is installed with a button 21 at a position with respect to a selected positioning hole 161 of the angle adjusting plate 161. The button 21 has a shaft 211 which has a size smaller than the size of the positioning hole 161. Thereby, adjusting the button 21 causes the shaft to be inserted into one of the positioning hole 161.

[0014] A rear bottom of the treading rod 40 is formed with a closed guide groove 41. The inner side of the guide groove 41 is formed with a convex cambered portion 411. Each crank 30 is pivotally installed with a pulley 31. A middle section of the pulley 31 is formed as a concave cambered portion 311 for receiving the convex cambered portion 411 so that the pulley 31 is positioned in the guide groove 41 of the treading rod 40 and can freely move in the guide groove 41.

[0015] Thereby, when the shaft 211 of the button 21 is adjusted to position in one of the positioning hole 161, the arm 20 is positioned. Thereby, a movable fulcrum is formed at the pivotal connection of the treading rod 40 and the arm 20. When the crank 30 moves cyclically, the pulley 31 pivotally installed to the crank 30 only moves in the guide groove 41 leftwards and rightwards. Moreover, the treading rods 40 move reciprocally with the treading actions of the user. If the shaft 211 of the button 21 is inserted into another positioning hole 161, the moving range of the treading rods 40 will change so as to adjust the difficulty in exercise.

[0016] Moreover, when the shaft of the button 21 is adjusted to move out of the positioning hole 161, the arm 20 can freely move forwards and backwards. As the pulley 31 slides to a buckle groove 42 at a distal end of the guide groove 41, by the cranks 30 to move along a round trace, the treading rods 40 is drive to move along an elliptical trace. Thereby, the present invention has dual functions.

[0017] Furthermore, referring to FIGS. 2 and 5, an upper end of each treading rod 40 is installed with a position-adjustable pedal 50 so as to set a connecting position of the pedal 50 to the treading rod 40. A plurality of though holes 43 are spaced arranged at one lateral side of the treading rod 40. A bottom of the pedal 50 has a resisting plate 51 which can resist against the two lateral sides of the treading rod 40. The clamping plate 51 is installed with a positioning pin 52 at position with respect to one side of the treading rod 40 having the though holes 43. When one end of the positioning pin 52 is adjusted to be inserted to one though hole 43, the pedal 50 is firmly positioned to the treading rod 40. The pedal 50 serves to be treaded by users. When the pedal 50 is adjusted to be positioned to the treading rod 40 near the supporting rod 11, the moving arc of the pedal 50 is smaller. If the pedal 50 is positioned near a distal end of the treading rod 40, the moving arc of the pedal 50 is larger.

[0018] Referring to FIGS. 6 to 8, one embodiment of the trading rod 40 and crank 30 of the present invention is illustrated. A rear bottom of the treading rod 40 is installed with a seal guide groove 41 and an inner side of the distal end has a positioning plate 44. The positioning plate 44 has a round hole 441 at a predetermined position. A sliding wheel 31 of the crank 30 is mounted in the seal guide groove 41. The sliding wheel 31 has a concave hole 312. The sliding wheel 31 can be guided to a distal end of the guide groove 41. Then the concave hole 312 of the sliding wheel 31 is aligned to the round hole 411 of the positioning plate 44. Then a pin 60 is inserted into the concave hole 312 from the round hole 441 so that the sliding wheel 31 is positioned at a fixing position of the guide groove 41. When the pin 60 is taken not, the sliding wheel 31 is movable in the guide groove 41.

[0019] Although the present invention has been described with reference to the preferred embodiments, it will be understood that the invention is not limited to the details described thereof. Various substitutions and modifications have been suggested in the foregoing description, and others will occur to those of ordinary skill in the art. Therefore, all such substitutions and modifications are intended to be embraced within the scope of the invention as defined in the appended claims.