Cam Hinge Assembly for Compact Foldable Device Strength
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Solution Overview
Problem
Existing hinge assemblies in flexible electronic devices face challenges in maintaining structural integrity and minimizing size while allowing for smooth folding and unfolding motions.
Innovation Solution
A hinge assembly with a hinge bracket, shaft, arm member, cam member, and pressing member, featuring cam crests and connecting portions, enhances structural strength and allows for miniaturization by aligning cam crests to increase connecting portion width.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the hinge assembly is miniaturized to reduce device size, then the overall dimensions are reduced, but the structural strength and durability of the hinge may be compromised
Solution Approach 1:
The patent applies local quality by creating a connecting portion with increased thickness at the critical stress concentration point where the cam portion connects to the body portion. This localized reinforcement strengthens the hinge assembly without requiring overall dimensional increases, thus resolving the contradiction between miniaturization and structural strength.
2Strength
If cam crests are aligned to increase connecting portion width, then the strength of the connecting portion is enhanced, but the complexity of the cam mechanism increases
Solution Approach 1:
The cam mechanism is segmented into distinct functional elements: the cam portion with cam crests, the connecting portion with increased thickness, and the body portion. This segmentation allows each component to be optimized independently - the cam crests provide mechanical interlocking for strength while the connecting portion's increased thickness provides structural reinforcement, without requiring complex integration that would increase overall design complexity.
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 design enhances the strength of the hinge assembly and reduces the risk of damage while achieving a compact size, ensuring smooth operation and durability in flexible electronic devices.
Implementation Method 1
a cam member inserted into the shaft such that cam interoperation between the arm member and the cam member is implemented
Data Source
AI summary
In an embodiment, an electronic device may include a hinge assembly. The hinge assembly may comprise a hinge bracket, a shaft rotatably connected to the hinge bracket, an arm member connected to the shaft, a cam member inserted in the shaft, a pressing member which presses the cam member toward the arm member, and an arm bracket slidably connected to the arm member. The arm member may comprise a cam portion having a plurality of cam peaks formed along the circumference of a through-hole, a body portion to which the arm bracket is slidably connected, and a connection portion connecting the cam portion and the body portion. When seen in a direction perpendicular to the shaft, from among the plurality of cam peaks, a first cam peak may be positioned so that at least part thereof can be aligned with the connection portion.