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A luminous device capable of automatically generating power includes a set of induction coils with one end connecting to a luminous element and placed inside a light conductor which is fastened onto a steel wire of a wheel via a fastening structure; one or more than one magnets are disposed inside a

A luminous device capable of automatically generating power includes a set of induction coils with one end connecting to a luminous element and placed inside a light conductor which is fastened onto a steel wire of a wheel via a fastening structure; one or more than one magnets are disposed inside a magnet case corresponding to the set of induction coils. Therefore, when the wheel spins, it drives the light conductor to rotate thereby generating electric current between the set of induction coils and the magnet to further drive the luminous element. In addition, the light conductor guides the light source of the luminous element outwardly so as to generate luminous and warning function.

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1. A luminous device capable of automatically generating power installed on a wheel disposed with wheel spokes and steel wires comprising:an induction coil having a shaft with coils and a single magnet pole; the single magnet pole inserts into the shaft and which has one end extends to define a conv

1. A luminous device capable of automatically generating power installed on a wheel disposed with wheel spokes and steel wires comprising:an induction coil having a shaft with coils and a single magnet pole; the single magnet pole inserts into the shaft and which has one end extends to define a convex piece;a luminous element connects with a fuse of the coils and is disposed onto the convex piece of the shaft;a light conductor with a receiving portion at its distal end receiving the induction coil of the luminous element;a plurality of magnets are disposed inside an assembled magnet case which is secured on to a wheel frame to make the magnets and the induction coil induct with each other;wherein a fastening structure is disposed on outer rims of a receiving portion of the light conductor and has a retaining member retained onto the steel wires; an extendable catching body is inserted at a front end of the light conductor and has a movable catching piece thereof fit with a catching tooth disposed at the front end of the light conductor; clamp openings are disposed on two lateral sides of the extendable catching body; the extendable catching body pushes against a steel ring area thereby clamping the clamp openings onto the steel wires and presses the movable catching piece to stop at the catching tooth so as to precisely and steadily hold the luminous device between the steel wires of the wheel,when the wheel spins, it rotates the light conductor thereby making the induction coil inside the light conductor and the magnets on the assembled magnet case induct to generate electric current, further driving the luminous element and guiding the light source of the luminous element outwardly via the light conductor so as to provide a luminous and warning effect. 2. A luminous device capable of automatically generating power according to claim 1, wherein the light conductor is fastened on to a unitarily molded wheel spoke. 3. A luminous device capable of automatically generating power according to claim 1, wherein the light conductor is disposed between the steel wires of the wheel. 4. A luminous device capable of automatically generating power according to claim 1, wherein, the assembled magnet case is adjustably fastened onto a universal joint, the universal joint adjusting an angle of the assembled magnet case to a predetermined position relative to the induction coil. 5. A luminous device capable of automatically generating power according to claim 1, wherein assembled magnet case is unitarily molded and fastened onto the wheel shaft. 6. A luminous device capable of automatically generating power according to claim 1, wherein the light conductor is solid or hollow with the exterior surface thereof formed to have a plurality of matted planes, concave rings, convex portions or through holes capable of refracting or reflecting the light; through the function of having light to refract or reflect at two different mediums or interfaces, a single light source generates a multi light-spot effect and a visual effect of further lightening up the whole wheel surface when the wheel is spinning.