| 摘要 |
An improved compact generator, a light-emitting wheel adopting the same and a manufacturing method are provided. To make a generator compact and light to smoothly perform electromagnetic induction by crossing the directions of magnetic flux of an armature coil and a permanent magnet, an assembly structure including an armature arm and the armature coil is improved. To prevent damage by impact to the permanent magnet and use a rare-earth based permanent magnet in a ring type having the thickness of 1.2 mm in Lanthanides which has a magnetic force 9-10 times stronger than that of a ferrite based permanent magnet but is weak against impacts, a permanent magnet assembly is provided in which the permanent magnet is arranged on a buffer. Also, to facilitate a lead wire connection between the generator and a light-emitting device and to prevent damage to a lead wire when a wheel hub is molded which is integrally injection-molded with the armature coil assembly, a hollow protruding lead wire guiding portion for protecting a lead wire is provided at the armature coil assembly. As a result, the generator becomes more compact, lighter, and can be reliably and efficiently manufactured in a wheel, that is, mass production is improved and the wheel can be easily replaced. Also, the size of the improved generator is minimized so as to be installed at the wheel of a roller skate. As the light-emitting device emits light by color by the current induced by a rotational force of the wheel, a user can easily identify one's position in a dark place, reducing possibility of accidents and concurrently providing interest to the user and other viewers. Further, the light-emitting wheel is simply manufactured by installing light-emitting devices on a metal circuit plate by an automated robot before or after an additional metal circuit plate is installed at a wheel hub and inserting the metal circuit plate in the wheel hub. Thus, manpower needed for a light-emitting device welding process can be reduced, a wheel assembly process is simplified, and the connection between the generator and the light-emitting device is made easy, lowering the defective rate and improving mass production. Also, when an expensive rare-earth based magnet is used, the thickness of the magnet can be decreased by fixing the permanent magnet using the buffer, which increases the economic value thereof.
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