Mandrel Flex Circuit Routing for Hinged Electronics
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Consumer electronic devices with hinged sections face challenges in securely routing signals between housing sections without exposing cables to damage from hinge mechanisms, especially as devices become smaller and thinner, limiting space for clutch assemblies and cables.
Innovation Solution
A flex cable is routed between housing sections with a cover that moves with the cable to provide physical protection, using a mandrel to guide the cable and a cover made of durable, flexible material to prevent exposure and damage, while maintaining aesthetic appeal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If cables are routed around the hinge mechanism or through a center hole in a clutch assembly, then signal transmission between housing sections is achieved, but the cables become exposed to potential damage from the hinge mechanism
Solution Approach 1:
The cable is nested within a cable management structure that includes a cable guide and cable retention features. The cable is routed through a cable opening in the housing, guided by a cable guide that prevents lateral movement, and retained by cable retention features such as clips or slots that secure the cable in place, protecting it from damage while allowing movement between housing sections
Solution Approach 2:
A cable management structure serves as an intermediary component between the cable and the hinge mechanism. This intermediate structure includes protective elements such as a cable guide, retention features, and positioning elements that mediate the interaction between the cable and potential sources of damage, allowing the cable to move safely with the hinge
2Length of moving object
If devices get smaller and thinner, then portableability is improved, but the space available for clutch assemblies, hinges and cables is constrained
Solution Approach 1:
The cable routing design utilizes the third dimension (depth/thickness) by routing cables through openings in the housing and using depth-based retention features. The cable management structure extends in the depth dimension rather than requiring additional lateral space, allowing thin device profiles while maintaining adequate cable routing and retention space
Solution Approach 2:
The cable management structure employs thin-film or flexible cable guide elements that can be integrated into the housing without adding significant thickness. These thin-film cable guides and retention features allow the device to maintain a thin profile while providing necessary cable protection and routing
3Reliability
If a cover is added to protect the cable, then cable protection is improved, but device complexity increases
Solution Approach 1:
The cable management structure is merged with the housing and hinge assembly rather than being a separate independent component. The cable guide, retention features, and protective elements are integrated into the existing housing structure, combining multiple functions into a unified assembly that reduces overall device complexity while maintaining cable protection
Solution Approach 2:
The cable management structure serves multiple functions simultaneously: it guides the cable, retains the cable in place, protects the cable from damage, and allows movement between housing sections. This multi-functional design eliminates the need for separate dedicated components, reducing device complexity while providing comprehensive cable protection
Data Source
AI summary
Cable assemblies for providing electrical communication between hinged sections of an electronic device are described. The cable assemblies can include a cover that covers one or more cables that run through a hinge region of the electronic device. The cable and cover can be drawn over a mandrel of the hinge region. The cover and the portions of the mandrel can be visible to a user at the hinge region of the electronic device. The cover can be sufficiently rigid to guide a path of the cable and protect the cable from bending beyond a prescribed angle during rotation of the electronic device at the hinge region. The cover can also be sufficiently rigid to prevent ceasing or folding of the cover and the cable during rotation of the electronic device at the hinge region.