US 11,738,250 B2
Electric treadmill with safety stop function
Hung-Mao Liao, Taichung (TW); and Joe Chen, Taichung (TW)
Assigned to Johnson Health Tech. Co., Ltd., Taichung (TW)
Filed by Hung-Mao Liao, Taichung (TW); and Joe Chen, Taichung (TW)
Filed on Apr. 29, 2021, as Appl. No. 17/243,602.
Prior Publication US 2022/0347546 A1, Nov. 3, 2022
Int. Cl. A63B 71/00 (2006.01); A63B 22/02 (2006.01); A63B 24/00 (2006.01)
CPC A63B 71/0054 (2013.01) [A63B 22/025 (2015.10); A63B 24/0087 (2013.01); A63B 2071/0081 (2013.01); A63B 2220/833 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A motorized treadmill, comprising:
a base;
an endless belt movable relative to the base for allowing a user to exercise thereon;
a motor coupled to the endless belt for driving the endless belt to rotate;
a current sensor coupled to the motor and configured to detect a motor current of the motor when the motorized treadmill is in use; and
a controller in communication with the motor and the current sensor, the controller configured to analyze fluctuations of the motor current to determine whether objects or children interfere with rotation of the endless belt;
wherein when the current sensor detects a current change of the motor current not associated with the user of the motorized treadmill, the controller determines that the endless belt is interfered by objects or children and stops operation of the motor to slow or stop rotation of the endless belt.