Head lamp of a bicycle and head lamp electric circuit
1 Assignment
0 Petitions
Accused Products
Abstract
A bicycle headlamp 1 includes a rotor 3 including a plurality of magnet plates 33 attached to spokes 91 of a wheel of a bicycle 9 along the circumference of the wheel, each magnet plate having the form of an arc of a certain circle and including a plurality of magnets 31 disposed at regular circumferential spacings with alternating south and north poles; a stator 5 including a power-generating coil 53 including a coil and an iron core disposed in a fixed position to face the magnetic pole faces of the magnet plates 33 of the rotor 3; a case containing at least a headlamp electrical circuit 71 for establishing resonance at a frequency synchronized with a certain relative speed of the magnets by means of the power-generating coil 53 of the stator 5 and a capacitor connected in series with the power-generating coil 53 and for rectifying, smoothing out, and outputting electric power obtained from the power-generating coil 53, a light-emitting diode 73 which is lit by the electric power supplied from the headlamp electric circuit 71, and a condenser lens 75 for focusing light emitted from the light-emitting diode in front of the bicycle and for illuminating the roadway.
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Citations
24 Claims
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1-9. -9. (canceled)
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10. A bicycle headlamp comprising:
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a rotor comprising a plurality of magnet plates attached to spokes of a bicycle wheel along the circumference of the wheel, each magnet plate having a form of an arc of a certain circle and comprising a plurality of magnets disposed at regular circumferential spacings with alternating south and north poles;
a stator comprising a power-generating coil comprising a coil and an iron core disposed in a fixed position to face the magnetic pole faces of the magnet plates of the rotor; and
a case separated from the stator, or for containing a part of the stator, wherein the case contains at least a headlamp electrical circuit comprising a resonance circuit formed of the power-generating coil of the stator and a capacitor connected in series with the-power-generating coil, for establishing resonance at a frequency synchronized with a certain relative speed of the magnets, and a DC power circuit for rectifying, smoothing, and outputting electric power obtained from the power-generating coil of the resonance circuit, a light-emitting diode that is lit by the electric power supplied from the headlamp electrical circuit, and a condenser lens for focusing light emitted from the light-emitting diode in front of the bicycle and for illuminating the roadway. - View Dependent Claims (11, 12, 13, 14, 16, 17, 18, 19, 20, 21)
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22. A headlamp electrical circuit comprising:
a resonance circuit for establishing resonance at a frequency synchronized with a certain relative speed between magnets and a power-generating coil of a stator, obtained when a bicycle is pedaled at a predetermined standard speed, the resonance circuit comprising the power-generating coil of the stator and a capacitor connected in series with the power-generating coil; and
a DC power circuit for rectifying and smoothing electric power obtained from the power-generating coil of the resonance circuit and for supplying the electric power to the light-emitting diode.- View Dependent Claims (23, 24)
Specification