Patent ID: 8500201
Filing Date: 2013-08-06
Classification: A47C,A63G

Abstract:
1. An electromagnetic rocking chair comprising a base, a chair seat, two fixed rods, and two suspension rods, wherein each of the fixed rods has a lower end fixed on one end of the base, and a transverse shaft is fixed on both upper ends of the fixed rods, an upper end of the respective suspension rods is pivotally connected to the transverse shaft, the chair seat is fixed at a lower end of the respective suspension rods, a permanent magnet is disposed at the lower end of one of the suspension rods, under the permanent magnet are disposed two electromagnets, the two electromagnets are both fixed on the base and connected to a control circuit provided on a circuit board, the two suspension rods are driven by magnetic force to make the chair seat rock back and forth, wherein the control circuit provided on the circuit board includes a control chip U 3 , a pin A of the control chip U 3 is connected to a power source through a resistor R 7 , a diode D 2 , and a resistor R 6 , a pin B of the control chip U 3 is connected to the power source through a resistor R 9 and connected to the ground through a switch SW 1 , between pins I, J of the control chip U 3 is cross connected a crystal oscillator Y 1 , a pin AB of the control chip U 3 is connected to a base of a triode Q 1 through a resistor R 16 , an emitter of the triode Q 1 is connected to a base of a triode Q 3 , a collector of the triode Q 1 is connected to a base of a triode Q 2 through a resistor R 17 , a pin AC of the control chip U 3 is connected to a base of a triode Q 4 through a resistor R 19 , a collector of the triode Q 4 is connected to a base of a triode Q 5 through a resistor R 20 , an emitter of the triode Q 4 is connected to a base of a triode Q 6 , a collector of the triode Q 6 is connected to an emitter of the triode Q 7 , a connector of the triode Q 5 is connected to a connector of the triode Q 8 , the collector of the triode Q 2 is further connected to a collector of the triode Q 3 through a capacitor C 12 , and a coil L 1 , between the emitter of the triode Q 2 and the collector of the triode Q 3 are cross connected diodes D 3 , D 4 , D 5 , D 6 .