Foldable Hinge Cam Locking to Avoid EMR Pen Interference
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Solution Overview
Problem
Foldable electronic devices with magnetic fixation mechanisms can interfere with electromagnetic resonance (EMR) type devices, causing operational errors, such as issues with electronic pens, due to magnetic influences.
Innovation Solution
A hinge structure incorporating a gear and cam mechanism that allows the foldable device to be fixed in specific states without using magnets, ensuring stable operation of EMR devices by enabling the first and second housing structures to rotate about distinct folding axes and be securely fixed in unfolded, folded, or intermediate states using a cam structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If magnets are disposed at sides of the first housing and the second housing to fix the housings in folded or unfolded states, then the housing stability is improved, but electromagnetic resonance devices operate incorrectly due to magnetic interference
Solution Approach 1:
The patent extracts and removes the magnetic fixation mechanism from the device, replacing it with a mechanical cam-based locking system. This eliminates the harmful magnetic interference while preserving the housing stability function through purely mechanical means involving cams, gears, and locking arms that engage at specific folding angles.
Solution Approach 2:
The patent replaces the magnetic field-based fixation system with a mechanical system comprising cams, gears, and locking arms. The mechanical system uses physical engagement of cam lobes with locking arms to maintain housing positions, substituting electromagnetic forces with mechanical forces to achieve the same stabilization effect without interfering with EMR devices.
2Adaptability or versatility
If a gear hinge structure is used to enable rotation about folding axes, then the foldable device achieves flexible positioning, but shaking occurs in folded or unfolded states due to tolerances
Solution Approach 1:
The patent implements a dynamic locking mechanism where cams rotate with the gear hinge and engage/disengage locking arms based on the folding angle. The system transitions between locked and unlocked states dynamically, providing flexibility during movement while ensuring stability at specific positioned states through mechanical engagement.
Solution Approach 2:
The patent introduces locking arms as intermediary elements between the cam structure and the housing. These locking arms act as mediators that transmit and maintain the positional relationship between housings, preventing shaking by providing additional mechanical support at specific folding angles without restricting the overall flexibility of the hinge.
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
The solution effectively prevents shaking of the device in specific states, enhancing reliability and preventing malfunctions in EMR components, such as electronic pens, by eliminating magnetic interference.
Implementation Method 1
a cam structure configured to fix the first housing structure and the second housing structure in an unfolded state or a folded state
Implementation Method 2
a gear structure configured to enable a first housing structure connected to a side of the hinge structure to rotate about a first folding axis and a second housing structure connected to another side of the hinge structure to rotate about a second folding axis
Data Source
AI summary
One or more embodiments relate to a foldable electronic device. The electronic device includes a display, a foldable housing including a first housing structure and a second housing structure, and a hinge structure disposed between the first housing structure and the second housing structure. The hinge structure may include a first structure configured to enable the first housing structure to rotate about a first folding axis and the second housing structure to rotate about a second folding axis, and a second structure configured to fix the first housing structure and the second housing structure in an unfolded state or a folded state. Other various embodiments are possible.