Hinge
Hinge ( 10 ) includes first case ( 11 ) having an insertion hole through which a first hinge shaft ( 17 ) is inserted and a guide groove guiding first link shaft ( 23 ), second case ( 12 ) having a first insertion hole and a second insertion hole through which second hinge shaft ( 19 ) and third hinge shaft ( 21 ) are respectively inserted and a guide groove guiding second link shaft ( 25 ), and a link mechanism that maintains intervals between first hinge shaft ( 17 ), second link shaft ( 25 ) and center shaft ( 27 ), intervals between second hinge shaft ( 19 ), first link shaft ( 23 ), and center shaft ( 27 ), and intervals between third hinge shaft ( 21 ), first link shaft ( 23 ), and center shaft ( 27 ), and a first member and a second member are supported with first case ( 11 ) and second case ( 12 ) respectively such that the first member and the second member are rotatable about a virtual rotation axis.
1. A hinge ( 10 , 80 ) that supports a first member and a second member such that the first member ( 51 ) and the second member ( 52 ) are rotatable about a virtual rotation axis (A), the hinge ( 10 , 80 ) comprising:
a first hinge shaft ( 17 ) parallel to the virtual rotation axis (A);
a second hinge shaft ( 19 ) parallel to the virtual rotation axis (A);
A first link shaft ( 23 ) parallel to the virtual rotation axis (A);
a second link shaft ( 25 ) parallel to the virtual rotation axis (A);
a center shaft ( 27 ) parallel to the virtual rotation axis (A);
a first case ( 11 ) attached with the first member ( 51 ), the first case including an insertion hole ( 11 d ) through which the first hinge shaft ( 17 ) is inserted, and a guide groove ( 11 g ) that guides the first link shaft ( 23 );
a second case ( 12 ) attached with the second member ( 52 ), the second case including an insertion hole ( 12 d ) through which the second hinge shaft ( 19 ) is inserted, and a guide groove ( 12 h ) that guides the second link shaft ( 25 ); and
a first plate ( 14 , 84 ) including an insertion hole ( 14 a ) through which the first hinge shaft ( 17 ) is inserted, an insertion hole ( 14 c ) through which the second link shaft ( 25 ) is inserted, and an insertion hole ( 14 b ) through which the center shaft ( 27 ) is inserted; and
a second plate ( 15 ) including an insertion hole ( 15 a ) through which the second hinge shaft ( 19 ) is inserted, an insertion hole ( 15 d ) through which the first link shaft ( 23 ) is inserted, and an insertion hole ( 15 c ) through which the center shaft ( 27 ) is inserted.
2. The hinge ( 10 , 80 ) according to claim 1 , wherein
the guide groove ( 11 g ) of the first case ( 11 ) and the guide groove ( 12 h ) of the second case ( 12 ) are shaped to be symmetrical in a plane passing through the virtual rotation axis (A) and an axis of the center shaft ( 27 ).
3. The hinge ( 10 , 80 ) according to claim 1 , wherein
an axis of the first hinge shaft ( 17 ), an axis of the second hinge shaft ( 19 ), an axis of the first link shaft ( 23 ), an axis of the second link shaft ( 25 ), and the axis of the center shaft ( 27 ) are arranged to be symmetrical in the plane passing through the virtual rotation axis (A) and the axis of the center shaft ( 27 ).
4. The hinge ( 10 , 80 ) according to claim 1 , wherein
the guide groove ( 11 g ) of the first case ( 11 ) and the guide groove ( 12 h ) of the second case ( 12 ) guide the first link shaft ( 23 ) and the second link shaft ( 25 ) respectively along a predetermined path in a plane orthogonal to the virtual rotation axis (A) so that the first case ( 11 ) and the second case ( 12 ) are rotatable about the virtual rotation axis.
5. The hinge ( 10 , 80 ) according to claim 1 , wherein
the first case ( 11 ) and the second case ( 12 ) are synchronized such that the first case ( 11 ) and the second case ( 12 ) are symmetrical in the plane passing through the virtual rotation axis (A) and the axis of the center shaft ( 27 ), irrespective of a rotation angle.
6. The hinge ( 10 , 80 ) according to claim 1 , wherein
the first case ( 11 ) further comprises a stopper that limits a rotation angle of the first plate ( 14 , 84 ) about the first hinge shaft ( 17 ) inserted into the insertion hole ( 11 d ) of the first case to be in a predetermined range, and
the second case ( 12 ) further comprises a stopper that limits a rotation angle of the second plate ( 15 ) about the second hinge shaft ( 19 ) inserted into the insertion hole ( 12 d ) of the second case to be in a predetermined range.
7. The hinge ( 10 , 80 ) according to claim 1 , further comprising:
a first torque generating mechanism that generates a torque for a rotation between the first case ( 11 ) and the first plate ( 14 , 84 ) about the first hinge shaft ( 17 ); and
a second torque generating mechanism that generates a torque for a rotation between the second case ( 12 ) and the second plate ( 15 ) about the second hinge shaft ( 19 ).
8. The hinge ( 10 , 80 ) according to claim 7 , wherein
each of the first torque generating mechanism and the second torque generating mechanism comprises a leaf spring or a disc spring as energizing means.
9. The hinge ( 10 ) according to claim 1 , further comprises a third plate ( 16 ) including an insertion hole ( 16 c ) through which the first link shaft ( 23 ) is inserted and an insertion hole ( 16 b ) through which the center shaft ( 27 ) is inserted; and
a fourth plate ( 13 ) including an insertion hole ( 13 b ) through which the second link shaft ( 25 ) is inserted and an insertion hole ( 13 a ) through which the center shaft ( 27 ) is inserted.
10. The hinge ( 80 ) according to claim 1 , further comprises:
a third plate ( 83 ) including an insertion hole through which the first hinge shaft ( 17 ) is inserted, an insertion hole through which the second link shaft ( 25 ) is inserted, an insertion hole through which and the center shaft ( 27 ) is inserted;
and a fourth plate ( 16 ) including an insertion hole ( 16 a ) through which the second hinge shaft ( 19 ) is inserted, an insertion hole ( 16 c ) through which the first link shaft ( 23 ) is inserted, and an insertion hole ( 16 b ) through which the center shaft ( 27 ) is inserted.