Anti-pinch system for an electric seat
View Patent ↗An anti-pinch system for an electric seat includes a plurality of infrared sensing modules, a seat cushion hose, a footrest hose, a pressure sensor, at least one linear actuator, a central processing unit, a power module and a control module. When the user operates the electric seat to act, the plurality of infrared sensing modules and the pressures sensor synchronously sense whether an obstacle is under the electric seat. If an obstacle exists under the electric seat, the central processing unit will control the at least one actuator to stop or to reversely act. When the user cannot perceive obstacles by themselves, the electric seat can be automatically prevented from pinching obstacles, thus avoiding damaging the obstacles or the electric seat.
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.
2. The anti-pinch system as claimed in claim 1 , wherein the at least one linear actuator includes:
a first linear actuator configured to control a inclined angle of the seat back of the electric seat; and
a second linear actuator configured to control a lifting state of the seat cushion and the footrest of the electric seat.
3. The anti-pinch system as claimed in claim 2 , wherein the first linear actuator is connected to the frame of the sear back and receives a first retractable signal transmitted by the central processing unit, and the first retractable signal is configured to control the extension and retraction of the first linear actuator; and
the second linear actuator is connected to the frame of the seat cushion and the footrest and receives a second retractable signal transmitted by the central processing unit, and the second retractable signal is configured to control the extension and retraction of the second linear actuator.
4. The anti-pinch system as claimed in claim 1 , wherein, when the at least one linear actuator is actuated, the pressure sensor continuously detects pressures of the first fluid and the second fluid.
5. The anti-pinch system as claimed in claim 1 , wherein the control module includes an unlock button to unlock the electric seat.
6. The anti-pinch system as claimed in claim 1 , wherein the control module is a wired remote controller connected to the central processing unit through a wire.
7. The anti-pinch system as claimed in claim 1 , wherein the control module is a wireless remote controller wirelessly connected to the central processing unit.
8. The anti-pinch system as claimed in claim 1 , wherein the central processing unit further includes a wireless communication module configured for a mobile communication device that controls the central processing unit.