| 摘要 |
PURPOSE: A hinge device is provided to be automatically unfolded in a certain section, and to be automatically folded in other section, then to convert an operation state with a simple operation, thereby maintaining a pause state at an optional angle. CONSTITUTION: The first connection member(40) is rotated with the first unit, and straight moves in a rotational axis line direction. The second connection member(70) is rotated with the second unit. A main elastic member(30) applies a force to make the first connection member(40) near to the second connection member(70). A middle member(60) is disposed between the first and second connection members(40,70). A sub elastic member(50) applies a weaker force than that of the main elastic member(30), so that the second connection member(70) is near to the middle member(60) and the first connection member(40) is far away from the middle member(60).
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