US 12,491,404 B2
Stair stepper
Yu-Chih Chou, Fujian (CN)
Assigned to Xiamen Zhoulong Sporting Goods Co., Ltd., Xiamen (CN)
Filed by Xiamen Zhoulong Sporting Goods Co., Ltd., Fujian (CN)
Filed on Jul. 10, 2024, as Appl. No. 18/768,730.
Claims priority of application No. 202420547618.9 (CN), filed on Mar. 20, 2024.
Prior Publication US 2025/0295950 A1, Sep. 25, 2025
Int. Cl. A63B 22/20 (2006.01); A63B 21/00 (2006.01); A63B 21/04 (2006.01); A63B 21/055 (2006.01)
CPC A63B 22/205 (2013.01) [A63B 21/0442 (2013.01); A63B 21/0552 (2013.01); A63B 21/153 (2013.01); A63B 21/4034 (2015.10)] 10 Claims
OG exemplary drawing
 
1. A stair stepper, comprising:
a rack provided with two slide rails, wherein the two slide rails are arranged at intervals, and each of the two slide rails is slidably provided with one pedal component; and
a linkage mechanism configured to link the two pedal components, wherein the two pedal components are driven to move synchronously in reverse directions by using the linkage mechanism; and
a damping mechanism configured to provide resistance to the two pedal components, where the damping mechanism comprises a linear elastic element, the linear elastic element is straddled between the two slide rails, two ends of the linear elastic element are respectively connected to the two pedal components, the linear elastic element expands or contracts with the movement of the two pedal components synchronously in reverse directions to form a changing elastic force, and the changing elastic force acts on the two pedal components to form resistance to the movement of the two pedal components.