Gear synchronized dual axis pivot hinge
A portable information handling system supports a flexible OLED display film over housing portions rotationally coupled by a hinge by folding the OLED display film over the hinge. Hinge brackets that couple to the housing portions each have a gear member with a semicircular shape gear inner circumference that engages a gear subassembly of the hinge main body. Hinge bracket rotation translates through the gear subassembly for synchronized housing rotation. The hinge main body has first and second semicircular portions with a smooth surface defined to accept the outer circumference smooth surface of the gear member semicircular shape at first and second rotation axes about which the hinge brackets pivot so that the display film has space to fold in the closed position.
1. An information handling system comprising:
first and second housing portions;
processing components disposed in one or more of the housing portions, the processing components operable to process information;
a display film interfaced with the processing components and operable to present the information as visual images; and
a hinge rotationally coupling the first and second housing portions to support rotation between open and closed positions, the display film disposed over the hinge to fold in the closed position, the hinge having a main body and first and second brackets, each of the first and second brackets having a gear member extending outward with a semicircular shape, the main body having a gear subassembly and first and second guides, each of the first and second guides having a semicircular shape with first and second axes, the first gear member resting in the first guide to rotate about the first axis, the second gear member resting in the second guide to rotate about the second axis, the gear subassembly translating motion between the first and second gear members.
2. The information handling system of claim 1 wherein each of the gear members comprises a planetary gear engaged with a gear extending from the gear assembly.
3. The information handling system of claim 1 further comprising:
a torque element coupled to an end of the main body;
a first torque arm rotationally coupled to the torque element and slidingly coupled to the first bracket; and
a second torque arm rotationally coupled to the torque element and slidingly coupled to the second bracket;
wherein the torque arms translate torque to the first and second brackets in response to rotation of the first and second brackets relative to the main body.
4. The information handling system of claim 3 wherein each torque arm couples to each of the first and second brackets at a slot formed in the first and second brackets.
5. The information handling system of claim 4 wherein each slot has a non-linear path to generate variable torque.
6. The information handling system of claim 4 wherein the first and second gear members in the closed position retract into the main body to provide space for the display film to fold.
7. The information handling system of claim 1 wherein the first and second gear members in the open position extend out from the main body to a plane substantially in alignment with the brackets to provide support to the display film.
8. The information handling system of claim 1 further comprising:
a flexible cable interfacing the processing components of the first and second housing portions, the flexible cable coupled in a fixed manner across a bottom side of the main body; and
a cover coupled to the main body and over the flexible cable.
9. The information handling system of claim 8 further comprising:
a motherboard disposed in the first housing portion and supporting a central processing unit that executes instructions to process information; and
a daughterboard disposed in the second housing portion and interfaced with a battery that provides power;
wherein the flexible cable couples to the motherboard and the daughterboard.