Biaxial Hinge Positional Misalignment Correction
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Solution Overview
Problem
In portable electronic devices with biaxial hinge mechanisms, positional misalignment between components is challenging to prevent solely through dimensional accuracy, leading to issues like increased component costs and product degradation.
Innovation Solution
A biaxial hinge mechanism that includes a screw connection system allowing adjustable fastening between the first and second connecting components, with correcting means to align the positional relationship, and separate manufacturing of components to reduce costs and facilitate earlier delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If components are manufactured separately to reduce costs and facilitate delivery, then manufacturing efficiency and delivery speed improve, but positional misalignment between components increases
Solution Approach 1:
A positioning pin is introduced as an intermediary component between the first and second connecting components. The positioning pin fits into a positioning hole to establish and maintain the correct positional relationship between separately manufactured components, thereby enabling both separate manufacturing and precise alignment.
Solution Approach 2:
The screw connection mechanism allows adjustment of fastening parameters (tightening degree) to compensate for dimensional fluctuations. By controlling the fastening parameter, the system can accommodate variations in component dimensions while maintaining acceptable positional alignment.
2Manufacturing precision
If dimensional accuracy of components is improved to prevent misalignment, then positional alignment improves, but component costs increase
Solution Approach 1:
The positioning pin serves as a low-cost intermediary that ensures precise alignment without requiring high-dimensional-accuracy components. This allows the use of standard, lower-cost components while achieving the desired positional alignment through the positioning mechanism.
Solution Approach 2:
The adjustable screw connection allows parameter adjustment to compensate for dimensional variations. This eliminates the need for expensive high-precision components by using parameter adjustment (screw tightening) to achieve proper alignment with standard components.
3Manufacturing precision
If dimensional accuracy of components is improved to prevent misalignment, then positional alignment improves, but delivery time increases
Solution Approach 1:
The positioning pin enables separate manufacturing of components with standard tolerances, allowing parallel production and earlier delivery. The positioning pin is added during final assembly to ensure alignment, eliminating the need for time-consuming high-precision manufacturing processes.
Solution Approach 2:
The adjustable screw connection compensates for dimensional variations, allowing components to be manufactured separately with standard tolerances and assembled quickly. This parameter adjustment capability enables faster delivery without sacrificing alignment quality.
4Manufacturing precision
If structural looseness is increased to correct positional misalignment, then positional alignment improves, but product quality degrades
Solution Approach 1:
The positioning pin provides precise positional reference without requiring structural looseness. It actively corrects alignment through its positioning function while maintaining tight, rigid structural connections, thus preserving product quality and reliability.
Solution Approach 2:
Instead of creating structural looseness to allow adjustment, the invention uses a positioning pin to actively enforce correct positioning. The approach is inverted: rather than permitting deviation and correcting it through looseness, the system prevents deviation through the positioning mechanism while maintaining tight structural connections.
Data Source
AI summary
A portable electronic apparatus having a first case, a second case, and a two-axis hinge mechanism. Positional misalignment between both cases can be easily prevented without relying only on dimensional precision of the components of the two-axis hinge mechanism. The portable electronic apparatus has a hinge (4) for interconnecting the first and second cases so that they can be opened and closed about a first rotation axis (X) and at the same time interconnecting the first and second cases so that they can pivot about a second rotation axis (Y). The hinge (4) has a first case fixing component (122) fixed to the first case, a first connection component (452) connected to the first case fixing component (122) so as to be rotatable about the second rotation axis (Y), and a second connection component (461) connected to the second case so as to be rotatable about the first rotation axis (X). The first connection component (452) and the second connection component (461) are connected to each other with a screw. The degree of tightening of the screw for connecting the first connection component (452) and the second connection component (461) together can be changed when the first and second cases are closed by folding them about the first rotation axis (X).