PCB Housing Lateral Slots for Wire Retention Without Bending
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Solution Overview
Problem
Existing solutions for housing printed circuits with electrical wires in automotive vehicles cause mechanical tension and risk of electrical disconnections due to wire bending, and are costly and limit mass production possibilities.
Innovation Solution
A housing design with lateral grooves and retaining elements that allow electrical wires to emerge from lateral slots, reducing bending and using a retaining element to hold the wires in place, eliminating manual operations and allowing for automatic assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If electrical wires are passed under a hook in the housing to emerge from the housing, then the wires can be retained in position, but the wires become bent generating mechanical tension that causes the printed circuit to pop out and risks electrical disconnections
Solution Approach 1:
The housing is divided into functional zones: a first zone with lateral slots for wire passage and a second zone with a hook for wire retention. This segmentation allows wires to emerge cleanly from the lateral slots without bending, while the separate hook zone provides retention functionality without compromising wire straightness or connection reliability.
2Ease of operation
If electrical wires are bent to pass under a hook, then wires can be retained, but manual operations are required which reduces production rates
Solution Approach 1:
The housing is pre-configured with lateral slots and hooks in specific positions during manufacturing. This preliminary arrangement of retention elements eliminates the need for manual wire bending and positioning operations during assembly, allowing for automated wire insertion and significantly improving production rates while maintaining reliable wire retention.
3Ease of operation
If overmolding plastic around electrical wires is performed prior to insertion in housing, then wires are retained, but the cost increases and mass-production possibilities are reduced
Solution Approach 1:
The housing is segmented into distinct functional zones: lateral slots for wire passage and separate hook structures for wire retention. This segmentation eliminates the need for complex overmolding operations, allowing wires to be retained through simple mechanical engagement with the hooks and slots, thereby reducing manufacturing cost and enabling mass production.
Solution Approach 2:
The housing structure itself provides wire retention functionality through its built-in lateral slots and hooks, eliminating the need for separate overmolding operations or additional retention components. The housing serves its own dual function of both guiding wires through lateral slots and retaining them via hooks, simplifying manufacturing and reducing costs.
Data Source
AI summary
A protective housing fitted on board an automotive vehicle includes: a main housing space with a main cavity to receive a printed circuit, an upper opening for the insertion of the printed circuit into the main cavity, and at least one lateral groove, which includes two lateral slots each extending from an upper edge of the main housing space, and together forming a passage between the inside and outside of the main housing space; for each lateral groove, a respective retaining element, insertable into the lateral groove to locally close the passage between the inside and outside of the main housing space, so that in use, it comes to bear against a bundle of electrical wires emerging from the main cavity via the two lateral slots; and at each lateral groove, the two lateral slots each have a width substantially equal to the diameter of the electrical wires.