Spring-Biased Connector Assembly for Tolerance-Compensated Drive Bays
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Solution Overview
Problem
Conventional storage-device bays face reliability issues due to dimensional variations causing intermittent connections, increased insertion forces, and premature connector wear, as fixed clearance reserves fail to adapt to manufacturing and environmental changes.
Innovation Solution
A spring-biased, movable connector subassembly that translates under insertion force to eliminate gaps and maintain compressive preload, ensuring consistent contact pressure and signal integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a fixed clearance reserve is set large to avoid tight fits, then insertion becomes easy, but the mated interface can sit with residual clearance, reducing contact normal force and making continuity susceptible to vibration, shock, and thermal cycling
Solution Approach 1:
The connector support plate is made movable rather than fixed, allowing it to dynamically adjust its position in response to insertion forces and maintain optimal contact pressure. The plate can translate along the insertion axis to accommodate dimensional variations while ensuring consistent electrical contact, resolving the contradiction between easy insertion and reliable contact continuity.
2Reliability
If the reserve is set small to raise contact force, then contact normal force increases, but insertion forces climb, misalignment damage becomes more likely, and connectors wear prematurely
Solution Approach 1:
The movable support plate allows the system to dynamically balance contact force and insertion force. During insertion, the plate moves to accommodate the drive, reducing peak insertion forces. Once seated, the spring mechanism maintains appropriate contact normal force without requiring excessive pre-load, thus preventing premature wear and misalignment damage.
Solution Approach 2:
The spring-loaded support plate provides beforehand cushioning by allowing controlled movement during insertion. This cushioning effect absorbs insertion forces and prevents shock loads that could cause misalignment damage or premature connector wear, while still ensuring adequate contact force is maintained after seating.
3Ease of manufacture
If fixed clearance reserves are used, then manufacturing is simpler, but the clearance cannot adjust with drift in the field, leading to intermittent links and reliability issues
Solution Approach 1:
The support plate is designed to move along the insertion axis, transforming the fixed clearance system into a dynamic one. This movement capability allows the system to automatically compensate for dimensional variations and drift that occur during field operation, maintaining reliable electrical connection without requiring complex manufacturing controls or adjustment mechanisms.
Solution Approach 2:
The spring-loaded movable support plate provides self-adjusting functionality that compensates for dimensional variations and drift. The system serves itself by automatically adapting to changes in the field without requiring external intervention, complex manufacturing controls, or periodic maintenance, thus maintaining connection stability while keeping manufacturing relatively simple.
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
The solution effectively addresses tolerance stack-ups and simplifies installation by maintaining reliable electrical contact and signal integrity, reducing wear and misalignment issues in high-density and high-service environments.
Implementation Method 1
at least one resilient member arranged to bias the movable connector subassembly toward the fixed-side bracket
Implementation Method 2
the at least one resilient member maintains an axial compressive preload across the device-side connector and the mating connector
Data Source
AI summary
A storage-device bay includes a fixed-side bracket and a movable connector subassembly that translates along an insertion axis. The subassembly carries a connector PCBA with a mating connector and is biased toward the fixed-side bracket by at least one resilient member, preferably springs captured under abutments such as screw heads on the bracket. During insertion, the device-side connector mates while the subassembly translates against the bias; in a seated state, the bias maintains axial compressive preload across the mated connectors to absorb tolerances and improve contact reliability. Variants include a travel stop, alignment features, a PCBA support plate, multi-connector PCBA for multi-bay use with group translation, and independently movable sections providing localized preload per bay.