Axis Shifting Hinge Assembly for 180 Degree Rotation
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Solution Overview
Problem
Hinged electronic devices, such as laptops and flip mobile phones, face a geometric constraint where the cover portion cannot fully open to 180° due to interference with the base portion and protrusion of the hinge, limiting the range of rotation.
Innovation Solution
A hinge assembly with a first and second cam mechanism that engages with protrusions on the mounting portion to shift the axis of rotation from a first position to a second position during opening and back during closing, allowing for a 180° axis of rotation and avoiding interference between the cover and base portions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the hinge uses a fixed pivot axis, then the structure is simple, but the cover portion cannot open to 180° due to interference with the base portion
Solution Approach 1:
The hinge assembly dynamically shifts the axis of rotation from a first position to a second position during opening of the cover portion. This is achieved through cam mechanisms that engage with protrusions on the mounting portion, allowing the axis to move between positions. The dynamic adjustment enables full 180° opening without fixed structural constraints, resolving the contradiction between rotation range and structural simplicity.
Solution Approach 2:
The invention introduces movement in a second dimension by shifting the axis of rotation from one position to another. Instead of a single fixed pivot point, the system uses multiple possible axis positions that can be selected during operation. This dimensional change allows the cover to achieve 180° opening by transitioning to a different rotational axis, eliminating interference with the base portion while maintaining hinge functionality.
2Adaptability or versatility
If the hinge allows 180° opening, then the cover portion has full rotation freedom, but the hinge may protrude upward out of the plane
Solution Approach 1:
The cam mechanisms dynamically reposition the rotation axis to a second position that is offset from the first position. This dynamic adjustment allows the cover to open to 180° while the axis shift compensates for the protrusion issue. The system adapts the rotational geometry in real-time during opening, maintaining a compact profile while achieving full rotation range.
3Adaptability or versatility
If the hinge uses a fixed axis position, then the manufacturing is simple, but the cover portion interferes with the base portion during opening
Solution Approach 1:
The hinge assembly incorporates cam mechanisms with protrusions that enable dynamic axis shifting during operation. The cams engage with the protrusions on the mounting portion to transition the rotation axis from a first position to a second position. This dynamic feature, while adding some manufacturing complexity, enables full 180° opening without interference and provides significant functional benefit.
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 the cover portion to open fully to 180° without interference, enhancing the usability and design flexibility of electronic devices by maintaining a compact form when closed.
Implementation Method 1
The first cam being engageable with the first protrusion to move the axis of rotation from a first position to a second position during opening of the second member
Implementation Method 2
The second cam being engageable with the second protrusion to move the axis of rotation from the second position to the first position during closing of the second member
Data Source
AI summary
In one example, a hinge assembly is disclosed, which may include a first member and a second member rotatably connected to the first member through a mounting portion. The mounting portion may include a first surface having a first protrusion and a second surface, opposite the first surface, having a second protrusion. Further, the hinge assembly may include a first cam fixed to the first member and disposed adjacent to the first surface and a second cam fixed to the first member and disposed adjacent to the second surface. The first cam and second cam being engageable with the first protrusion and the second protrusion, respectively, to shift an axis of rotation of the second member.