| 摘要 |
<p>A treadmill comprises a frame having a base (12), a transmission device having a front roller and a rear roller (21) connected between two sides of said base (12), an endless belt (22) driven over said front and rear rollers, and an adjusting device for adjusting the tension of the endless belt (22) that includes two identical units (32) respectively connected to the two sides of the base (12), each unit (32) comprising a movable member (31) which is a substantially C-shaped member and has a passage defined therethrough, a threaded rod (37) connected to said passage, and an adjusting nut (35) rotatably mounted to a distal end of said threaded rod (37) extending beyond said movable member (31). A shaft of the rear roller (21) is connected to the two movable members (31) of the adjusting device so that, by operating the two adjusting nuts (35), the two movable members (31) are moved in the horizontal direction so as to adjust the distance between the front and rear rollers and the tension of the endless belt (22) without using electric power and with a simple and compact mechanism.</p> |
