| 摘要 |
The present invention provides an object a novel hinge device which is extremely valuable as a commercial product and an electronic instrument using the hinge device. A hinge device for pivoting a first member ( 1 ) and a second member ( 2 ) to be rotatably opened and closed is characterized in that when the second member ( 2 ) kept under a coupled and closed condition is opened to the first member ( 1 ), in a rotational range A 1 from the coupled and closed position P 1 to a predetermined open angle position P 2 rotated in an open direction, a closing rotational biasing effect is generated for automatically closing the second member ( 2 ) to the coupled and closed position P 1 relative to the first member ( 1 ), and when the second member ( 2 ) is manually rotated in the open direction exceeding the predetermined open angle position P 2 to the first member ( 1 ), an open rotational biasing effect is generated for automatically opening the second member ( 2 ) to a predetermined open angle position P 3 relative to the first member ( 1 ).
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