Triaxial Hinge Synchronous Rotation Mechanism
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Solution Overview
Problem
Conventional biaxial hinges limit the thickness reduction of notebook PCs, as they cannot efficiently and quickly open and close both casings in a synchronized manner, especially when using thin flexible display plates.
Innovation Solution
A triaxial hinge mechanism with a synchronous rotation system, including a first and second hinge shaft restrained by brackets, a third hinge shaft for forward and backward movement, drive gears, friction mechanisms for stable stoppage, and drawing mechanisms for automatic opening and closing, allowing both casings to open and close simultaneously and efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If a biaxial hinge with synchronous rotation mechanism is used, then the first casing and second casing can open and close in synchronized manner, but the distance between hinge shafts cannot be reduced further, limiting thickness reduction
Solution Approach 1:
The patent transitions from a biaxial hinge system to a triaxial hinge system by adding a third hinge shaft that moves in the forward and backward direction. This third dimension of movement allows the first and second hinge shafts to be positioned closer together, reducing the overall thickness of the electronic device while maintaining the synchronous rotation capability through the gear mechanism.
Solution Approach 2:
The third hinge shaft is designed to be movable in the forward and backward direction, allowing dynamic adjustment of the hinge mechanism's configuration. This dynamic capability enables the mechanism to accommodate the thin flexible display plate while maintaining proper gear engagement and synchronous rotation function.
2Length of moving object
If the distance between first hinge shaft and second hinge shaft is reduced, then thickness of casings can be reduced, but the synchronous rotation mechanism becomes more difficult to implement
Solution Approach 1:
The third hinge shaft acts as an intermediary element that facilitates the connection between the first and second hinge shafts. By introducing this intermediate component that can move forward and backward, the mechanism enables proper gear engagement and synchronous rotation even when the distance between the first and second hinge shafts is minimized, making the compact design manufacturable.
3Length of moving object
If thin flexible display plate is used, then thickness is reduced, but hinge mechanism with synchronous rotation capability becomes incompatible
Solution Approach 1:
The movable third hinge shaft provides the necessary adaptability to accommodate thin flexible display plates. The dynamic movement capability allows the hinge mechanism to maintain proper geometric relationships and gear engagement despite the reduced thickness, making the synchronous rotation mechanism compatible with modern thin flexible displays.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables thinner electronic devices by reducing the center distance between hinge shafts, facilitating quick and easy operation while maintaining stability at any opening angle, thus enhancing the usability and convenience of notebook PCs.
Implementation Method 1
The synchronous rotation mechanism comprises: a first hinge shaft attached to a first bracket, wherein a rotation of the first hinge shaft is restrained by the first bracket; a second hinge shaft attached to a second bracket, wherein a rotation of the second hinge shaft is restrained by the second bracket; drive gears on the first bracket and the second bracket; a turning member comprising a driven gear meshed with the drive gear provided on the first bracket, wherein a third hinge shaft and the second hinge shaft rotatably pass through the turning member; a further turning member comprising a driven gear meshed with the drive gear provided on the second bracket, wherein the third hinge shaft and the first hinge shaft rotatably pass through the turning member.
Data Source
AI summary
The triaxial hinge includes a first hinge shaft attached to a first casing via a first bracket, a second hinge shaft attached to a second casing via a second bracket and a third hinge shaft coupled to one end portion of a first coupling part and one end portion of a second coupling part. Respective other end portions of both coupling parts are attached to the first hinge shaft. There is a gear type synchronous rotation unit for transmitting a rotation of one of the first hinge shaft and the second hinge shaft accompanied by an opening and closing operation of the both casings to the other hinge shaft via the third hinge shaft, which is made to move in a forward and backward direction as accompanied by an opening and closing operation of the both casings.