Treadmill Having Auxiliary Cushioning

A treadmill comprising:

• a body including a holder and a circular running belt rotatably surrounding around the holder;
• a support assembly connected on the holder of the body, and the support assembly including multiple posts and two columns, the multiple posts extending upward from two sides of the body, the two columns being connected on the multiple posts of the two sides of the body so that the two columns are parallelly mounted above the two sides of the body, wherein the respective column has a slidable space defined therein, and the slidable space has two first chutes defined on two sides thereof;
• a resistance unit fixed on the support assembly, and the resistance unit including two sliding devices, two limitation structures, and a force exerting element;
• wherein the respective sliding device has a slider, multiple first rollers rotatably connected on two sides of the slider, wherein the slider of the respective sliding device is slidably accommodated in the slidable space of the respective column of the support assembly, the respective first roller of the slider is slidably received in the respective first chute of the slidable space, such that the slider of the respective sliding device slides linearly in the slidable space, wherein the respective sliding device further has a coupling portion extending out of the slidable space from the slider downward;
• two limitation structures, the respective limitation structure being accommodated in the slidable space of the respective column of the support assembly and being connected with the slider of the respective sliding device so that the slider of the respective sliding device is stopped and limited in the slidable space, when sliding, wherein the respective limitation structure includes two cylinder units and a first fixing unit, wherein the respective cylinder unit and the first fixing unit of the respective limitation structure are disposed on a front end of the slider of the respective sliding device, the first fixing unit is mounted on a front end of the respective cylinder unit, wherein a first end of the respective cylinder unit of the respective limitation structure is connected with the slider of the respective sliding device, and a second end of the respective cylinder unit of the respective limitation structure is connected with the first fixing unit;
• and
• wherein the force exerting element has two connection rods connected on two ends thereof, and the respective connection rod of the force exerting element is coupled with the coupling portion of the slider of the respective sliding device, such that a grip portion of the force exerting element is defined between the two columns of the support assembly, and the force exerting element actuates the slider of the respective sliding device to move.

A treadmill comprising:

• a body including a holder and a circular running belt rotatably surrounding around the holder;
• a support assembly connected on the holder of the body, and the support assembly including multiple posts and two columns, the multiple posts extending upward from two sides of the body, the two columns being connected on the multiple posts of the two sides of the body so that the two columns are parallelly mounted above the two sides of the body, wherein the respective column has a slidable space defined therein, and the slidable space has two first chutes defined on two sides thereof;
• a resistance unit fixed on the support assembly, and the resistance unit including two sliding devices, two limitation structures, and a force exerting element;
• wherein the respective sliding device has a slider, multiple first rollers rotatably connected on two sides of the slider, wherein the slider of the respective sliding device is slidably accommodated in the slidable space of the respective column of the support assembly, the respective first roller of the slider is slidably received in the respective first chute of the slidable space, such that the slider of the respective sliding device slides linearly in the slidable space, wherein the respective sliding device further has a coupling portion extending out of the slidable space from the slider downward;
• two limitation structures, the respective limitation structure being accommodated in the slidable space of the respective column of the support assembly and being connected with the slider of the respective sliding device so that the slider of the respective sliding device is stopped and limited in the slidable space, when sliding, wherein the respective limitation structure includes a resilient unit and a second fixing unit, wherein the respective resilient unit and the second fixing unit of the respective limitation structure are fixed on a rear end of the slider of the respective sliding device, and the second fixing unit is disposed on a rear end of the respective resilient unit, wherein a first end of the respective resilient unit of the respective limitation structure is connected with the slider of the respective sliding device, and a second end of the respective resilient unit of the respective limitation structure is connected with the second fixing unit;
• and
• wherein the force exerting element has two connection rods connected on two ends thereof, and the respective connection rod of the force exerting element is coupled with the coupling portion of the slider of the respective sliding device, such that a grip portion of the force exerting element is defined between the two columns of the support assembly, and the force exerting element actuates the slider of the respective sliding device to move.