Flexible Lead Overlap Management in Sliding Mobile Devices
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Solution Overview
Problem
In sliding-type mobile phones, the flexible lead's excessive portion covers part of the circuit board, restricting circuit design and assembly, as it needs to be longer than required for assembly, hindering electronic component mounting.
Innovation Solution
The flexible lead is folded on a predetermined region of the circuit board to create an overlapped portion, allowing the excessive length to be stored within the cabinet, preventing the covered area from expanding and maintaining space for electronic components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the flexible lead is made longer than the minimum required length to facilitate assembly, then ease of assembly is improved, but the area of the circuit board available for mounting electronic components is reduced
Solution Approach 1:
The flexible lead is folded back onto itself in a layered configuration, transitioning from a linear one-dimensional arrangement to a two-dimensional stacked arrangement. This allows the excessive length to be contained within a compact area on the circuit board without expanding the occupied footprint, thereby maintaining component mounting space while facilitating assembly.
Solution Approach 2:
The flexible lead is folded and nested onto itself, with the excessive portion being stored within the space already occupied by the functional portion of the lead. This nesting approach allows the longer lead to be accommodated within the same spatial envelope, preventing expansion of the covered area on the circuit board.
2Ease of operation
If the flexible lead is made longer than the minimum required length to facilitate assembly, then ease of assembly is improved, but circuit design flexibility is restricted
Solution Approach 1:
By folding the flexible lead onto itself in a layered configuration, the excessive length is contained within a compact area, preventing it from spreading across the circuit board. This maintains design flexibility by preserving available space for component placement and routing while still providing the longer lead length needed for easier assembly.
Solution Approach 2:
The physical state of the flexible lead is changed from a straight linear configuration to a folded layered configuration. This parameter change in spatial arrangement allows the same lead length to occupy less area, thereby maintaining circuit design flexibility while retaining the assembly advantages of a longer lead.
3Area of stationary object
If the flexible lead is folded on the circuit board to manage its length, then the area for electronic component mounting is preserved, but the flexible lead structure becomes more complex
Solution Approach 1:
The flexible lead is divided into functional segments through folding, with each folded layer serving as a separate segment. This segmentation allows the excessive length to be organized into manageable sections that are stacked upon each other, preserving circuit board area while the complexity is confined to the lead structure itself rather than affecting the overall device design.
Data Source
AI summary
A sliding-type mobile electronic device that can be easily assembled and can reduce restrictions of circuit design is provided. The sliding-type mobile electronic device according to the present invention includes a first cabinet 1 in which a circuit board is incorporated, a second cabinet 2 that is slidably connected to the first cabinet, in which an electric constituent is mounted, and a flexible lead 6 drawn from the electric constituent, passed through an opening provided in the first cabinet, and connected to the circuit board 5. The flexible lead has an overlapped portion 63 in which a part of the flexible lead is folded on a predetermined region F provided on a front surface of the circuit board.