| 摘要 |
A strength-saving structure for a foldable treadmill exerciser including a support stand, a movable frame body and two torque springs. The inner sides of the support bars of the support stand are disposed with oppositely extending circular tubes near the bottoms thereof. An arch board is disposed in each circular tube. The circular tube and the arch board define therebetween an arch rail. An arch projecting board of the frame body is slidably fitted in the arch rail. The two torque springs are respectively fitted around the circular tubes of the support bars. A hook section of each torque spring hooks an engaging pin under the circular tube, while a backing section of the torque spring backs the bottom of the long bar of the frame body. The torque springs are prestressed. Accordingly, before the frame body is downwardly unfolded, the frame body is backed by the prestressed torque springs and a part of the gravity making the frame body fall down is offset. Also, after use, a user can easily upward turn and fold the frame body from rear side thereof so as to save strength.
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