US 12,285,371 B2
Anti-pinch system for an electric seat
Andy Wang, Taichung (TW)
Assigned to SOFLEX FURNITURE CO LTD, Tortola (VG); and Yueh-Cheng Tsay, Taichung (TW)
Filed by Andy Wang, Taichung (TW); and Yueh-Cheng Tsay, Taichung (TW)
Filed on May 31, 2023, as Appl. No. 18/203,665.
Claims priority of application No. 112200714 (TW), filed on Jan. 18, 2023.
Prior Publication US 2024/0237831 A1, Jul. 18, 2024
Int. Cl. A61G 5/14 (2006.01); A47C 1/024 (2006.01); A47C 1/032 (2006.01); A47C 1/034 (2006.01); A47C 7/14 (2006.01); A47C 7/50 (2006.01); A47C 31/00 (2006.01); G05B 9/02 (2006.01)
CPC A61G 5/14 (2013.01) [A47C 1/0242 (2013.01); A47C 1/0244 (2013.01); A47C 1/03211 (2013.01); A47C 1/034 (2013.01); A47C 7/142 (2018.08); A47C 7/506 (2013.01); A47C 31/008 (2013.01); G05B 9/02 (2013.01); A61G 2203/726 (2013.01)] 8 Claims
OG exemplary drawing
 
1. An anti-pinch system for an electric seat, the electric seat including a seat back, a seat cushion, a footrest and an adjustable frame connected to the seat back, the seat cushion and the footrest, and a bottom surface of the footrest including a first side and a second side opposite each other; the anti-pinch system comprising:
a plurality of infrared sensing modules mounted on a frame base of the adjustable frame, and each infrared sensing module including:
an infrared emitter for emitting an infrared signal; and
an infrared receiver for receiving the infrared signal and accordingly transmitting an infrared sensing signal;
a seat cushion hose mounted along an edge of the bottom surface of the seat cushion and filled with a first fluid;
a footrest hose filled with a second fluid, and including:
a plurality of first bending sections mounted near the first side of the bottom surface of the footrest;
a plurality of second bending sections mounted near the second side of the bottom surface of the footrest;
a plurality of connecting sections; each connecting section connected between each first bending section and each second bending section;
a pressure sensor configured to detect a total pressure of the first fluid and the second fluid to generate a pressure sensing signal;
at least one linear actuator connected to the adjustable frame to control the seat back, the seat cushion and the footrest of the electric seat;
a central processing unit electrically connected to the plurality of infrared sensing modules, the pressure sensor and the at least one linear actuator to receive the infrared sensing signal and the pressing sensing signal; when the central processing unit does not receive the infrared sensing signal within a preset time or determines the pressure sensing signal has changed, the central processing unit controls the at least one actuator to stop or to reversely act;
a power module electrically connected to the central processing unit;
a control module electrically connected to the central processing unit to transmit a control signal to the central processing unit.