Juxtaposed Electrical Connector Assembly Tolerance Absorption
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Solution Overview
Problem
Conventional electrical connector assemblies face challenges with accumulated tolerance during mounting on printed circuit boards, leading to displacement issues due to the juxtaposed connection of multiple casings and design tolerances, which complicates secure and precise attachment in densely located electronic devices.
Innovation Solution
The proposed electrical connector assembly incorporates a positioning bottom plate with spaced fixing channels and fixing pins from auxiliary casings that absorb accumulated tolerance, allowing for precise alignment and reduced displacement by aligning the pins with the channels, thereby enhancing mounting precision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If multiple auxiliary casings are juxtaposed and connected to form different sized plug chambers, then manufacturing cost is reduced and material usage is optimized, but accumulated tolerance increases causing displacement during mounting
Solution Approach 1:
A positioning bottom plate is introduced as an intermediary component between the juxtaposed auxiliary casings and the printed circuit board. This bottom plate features positioning structures that absorb accumulated tolerance from the juxtaposed casings, preventing displacement during mounting while maintaining the cost-effective multi-casing design
2Ease of operation
If fixing pins are directly inserted into the printed circuit board, then mounting is simplified, but displacement occurs due to accumulated tolerance from juxtaposed casings
Solution Approach 1:
The positioning bottom plate serves as a mediator between the fixing pins and the printed circuit board. It incorporates positioning structures that compensate for accumulated tolerance, allowing simple direct insertion while eliminating mounting displacement
Solution Approach 2:
The positioning bottom plate is designed with tolerance-absorbing features that preemptively compensate for accumulated dimensional variations before mounting occurs, ensuring accurate positioning without requiring complex adjustment procedures
Data Source
AI summary
An electrical connector assembly includes several casings juxtaposed to and connected to one another along an assembling direction, and a positioning bottom plate disposed at a level below the casings. Each casing includes a top plate, a side wall extending downwardly from a lateral side along a mounting direction transverse to the assembling direction, and one fixing pin projecting downward from a bottom end of the side wall. The positioning bottom plate is formed with several rows of fixing channel. Each row of the fixing channels is aligned with the fixing pins of a respective casing. When the juxtaposed casings are brought to fix securely on a printed circuit board supporting the positioning bottom plate, the fixing pins of the casings respectively extend through the fixing channels in the positioning bottom plate such that the positioning bottom plate absorbs an accumulated tolerance caused due to a juxtaposed connection among the casings along the assembling direction.