| 摘要 |
The position control mechanism is provided to be pivotally mounted on a side of a full-faced and open-faced helmet. The position control mechanism includes at least a helmet body, at least a pair of control units, at least a chin guard and at least a visor plate. A pair of inserting feet are disposed in each side of the chin guard and a pair of inserting feet disposed on a fixing unit in each inward hollow of the chin guard, so as to move each adjusting article to be operated to adjust the positions of the chin guard and the visor plate of the helmet.
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