Hinge device and electronic apparatus
A hinge device includes a first shaft that is fixed to a display chassis, a second shaft that is fixed to a main body chassis, connecting plates to which the first shaft and the second shaft are rotatably fitted, a synchronization unit configured to synchronously rotate the first shaft and the second shaft in opposite directions with respect to the connecting plates, a first torque application unit configured to apply a frictional force to a peripheral surface of the first shaft by fitting the first shaft to the first torque application unit, and a second torque application unit configured to apply a frictional force to the second shaft in an axial direction.
1 . A hinge device that connects a first chassis and a second chassis to each other in a rotationally movable manner, the hinge device comprising:
a first shaft that is fixed to the first chassis;
a second shaft that is fixed to the second chassis;
a connecting member to which the first shaft and the second shaft are rotatably fitted;
a synchronization unit configured to synchronously rotate the first shaft and the second shaft in opposite directions with reference to the connecting member;
a first torque application unit configured to apply a first frictional force to a peripheral surface of the first shaft by fitting the first shaft to the first torque application unit; and
a second torque application unit configured to apply a second frictional force to the second shaft in an axial direction,
where the first torque application unit has a first band and a second band having different axial lengths,
the first band has a cross-sectional C-shape, including a first arc portion and a second arc portion, and a slit is formed between the first arc portion and the second arc portion, and
the second band has a cross-sectional C-shape, including a first arc portion and a second arc portion, and a slit is formed between the first arc portion and the second arc portion,
the first arc portions and have larger arc angles than the second arc portions.
2 . The hinge device according to claim 1 , wherein
the second torque application unit includes:
a flange on the second shaft, and
a nut screwed to a screw portion of the second shaft and tightened to the flange via an elastic member.
3 . The hinge device according to claim 1 , wherein
the first torque application unit is integrated with a tube body fitted to the second shaft.
4 . An electronic apparatus in which a first chassis and a second chassis are connected to each other in a rotationally movable manner by a hinge device,
wherein
the hinge device includes
a first shaft that is fixed to the first chassis,
a second shaft that is fixed to the second chassis,
a connecting member to which the first shaft and the second shaft are rotatably fitted,
a synchronization unit configured to synchronously rotate the first shaft and the second shaft in opposite directions with reference to the connecting member,
a first torque application unit configured to apply a first frictional force to a peripheral surface of the first shaft by fitting the first shaft to the first torque application unit, and
a second torque application unit configured to apply a second frictional force to the second shaft in an axial direction,
where the first torque application unit has a first band and a second band having different axial lengths,
the first band has a cross-sectional C-shape, including a first arc portion and a second arc portion, and a slit is formed between the first arc portion and the second arc portion, and
the second band has a cross-sectional C-shape, including a first arc portion and a second arc portion, and a slit is formed between the first arc portion and the second arc portion,
the first arc portions and have larger arc angles than the second arc portions.