PCB Cable Duct Routing with Friction Notches
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Solution Overview
Problem
Compact electronic devices like set-top boxes face challenges in minimizing size while accommodating wireless antennas and efficiently routing cables, as existing solutions either compromise antenna performance or make assembly difficult due to the need for adequate clearance and optimal antenna orientation.
Innovation Solution
The use of a device enclosure with cable guides and a cable duct featuring notches that secure cables by friction, allowing them to be easily routed through a hole in the printed circuit board, facilitating assembly and reducing excess cable length, which simplifies the assembly process and saves space and material costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wireless antennas are oriented vertically to minimize electrostatic discharge risk, then antenna performance is improved, but the device size must be enlarged to accommodate the vertical orientation
Solution Approach 1:
The patent transitions from vertical antenna orientation (requiring height space) to horizontal antenna orientation (utilizing planar space on the PCB). This dimensional change allows the antenna to maintain optimal performance and electrostatic discharge protection while accommodating compact device form factors, effectively resolving the contradiction between antenna reliability and device volume.
2Device complexity
If cables are routed manually through PCB holes without guidance structures, then device complexity is reduced, but assembly difficulty increases significantly
Solution Approach 1:
The patent introduces cable guides and cable ducts as intermediary structures that facilitate cable routing through the PCB. These guides act as mediators between the cable and the PCB hole, providing alignment and guidance during assembly. This resolves the contradiction by adding minimal structural complexity while dramatically improving assembly ease, as cables can now be routed systematically rather than manually threaded.
3Ease of manufacture
If excess cable length is allowed to simplify assembly, then assembly ease is improved, but device volume increases and material costs increase
Solution Approach 1:
The patent implements preliminary action by pre-configuring cable guides and ducts in the device enclosure before final assembly. These pre-installed guides prepare the cable routing path in advance, allowing cables to be inserted with minimal excess length. This resolves the contradiction by enabling precise cable length control during assembly, reducing both device volume and material costs while maintaining assembly ease through the pre-prepared routing infrastructure.
4Manufacturing precision
If cables are secured with friction-fit notches in the cable duct, then cable positioning precision is improved, but device complexity increases
Solution Approach 1:
The patent applies local quality by incorporating notches only at specific critical locations within the cable duct where cable positioning is required, rather than throughout the entire duct structure. This localized approach provides precise cable positioning where needed while minimizing the overall structural complexity of the cable duct. The notches create friction-fit engagement points that secure cables at precise positions without requiring complex fastening mechanisms throughout the entire routing path.
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
This solution enables efficient cable routing within compact devices, improving assembly efficiency and reducing material costs by allowing precise cable lengths, while maintaining optimal antenna performance without enlarging the device.
Implementation Method 1
the duct has one or more notches that provide access to a duct interior space... The least one cable enters the duct on a first side of the PCB and exits the duct on a second side of the PCB and is held in the one or more notches by friction
Data Source
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AI summary
Devices and methods for routing cables through a printed circuit board (PCB) include an enclosure having at least one cable guide and a cable duct. A PCB is mounted in the enclosure, such that the cable duct penetrates the PCB through a hole in the PCB. At least one additional component is mounted in the enclosure and connected to at least one cable that is attached to the at least one cable guide and the cable duct. The at least one cable enters the duct on a first side of the PCB and exits the duct on a second side of the PCB.