| 主权项 |
1. A smoothly openable and closable dual-shaft hinge, comprising:
an axle housing comprising a base defining a first surface at a top side thereof and a second surface at an opposing bottom side thereof, a first bearing portion smoothly curved from one lateral side of said first surface of said base in direction toward an opposite lateral side of said first surface, a first pivot shaft chamber defined between said first bearing portion and said first surface, a second bearing portion smoothly curved from one lateral side of said second surface of said base in direction toward an opposite lateral side of said second surface, a second pivot shaft chamber defined between said second bearing portion and said second surface, said first bearing portion and said second bearing portion extending in reversed directions; and a pivot shaft set comprising a first pivot shaft and a second pivot shaft, said first pivot shaft comprising a first shaft body located at one end thereof and a first connection bar located at an opposite end thereof, said first shaft body being pivotally coupled to said first pivot shaft chamber of said axle housing, said first connection bar being disposed outside said axle housing and connected to a cover member, said second pivot shaft comprising a second shaft body located at one end thereof and a second connection bar located at an opposite end thereof, said second shaft body being pivotally coupled to said second pivot shaft chamber of said axle housing, said second connection bar being disposed outside said axle housing and connected to a base member; wherein when turning said cover member toward a bottom side of said base member, said first pivot shaft is rotated with said cover member in said first pivot shaft chamber and said axle housing is turned about said second pivot shaft in accordance with the turning direction of said cover member, and at this time, the rotating direction of said first pivot shaft is reversed to the extending direction of said first bearing portion from said first surface and the turning direction of said axle housing is reversed to the extending direction of said second bearing portion from said second surface, and thus, the friction resistance produced between said first shaft body of said first pivot shaft and said first bearing portion is smaller than the friction resistance produced between said second shaft body of said second pivot shaft and said second bearing portion; when turning said cover member toward an opposing top side of said base member, said first pivot shaft is rotated with said cover member in said first pivot shaft chamber in accordance with the turning direction of said cover member and said axle housing is turned about said second pivot shaft in accordance with the turning direction of said cover member, and at this time, the rotating direction of said first pivot shaft is same as the extending direction of said first bearing portion from said first surface and the turning direction of said axle housing is same as the extending direction of said second bearing portion from said second surface, and thus, the friction resistance produced between said first shaft body of said first pivot shaft and said first bearing portion is larger than the friction resistance produced between said second shaft body of said second pivot shaft and said second bearing portion. |
