Modular Terminal Block Alignment Plate Conductor Positioning
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Solution Overview
Problem
Modular terminal blocks face alignment issues due to manufacturing tolerances, leading to conductor misalignment and potential damage during installation, and the terminal housing cover tends to bow open, compromising the integrity of the electrical connection.
Innovation Solution
The introduction of an alignment member with movable conductors and support structures within the housing modules ensures accurate alignment and resistance to deflection, while the cover retention mechanism maintains the terminal housing closed along its length.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If module stacks are made longer to accommodate more conductors, then the electrical connection capacity increases, but manufacturing tolerances cause conductor misalignment with vias
Solution Approach 1:
An alignment plate is introduced as an intermediary component between the module stack and circuit board. The alignment plate has openings that receive conductors and positioning surfaces that ensure accurate alignment, acting as a mediator that compensates for tolerance accumulation in long module stacks
Solution Approach 2:
The terminal housing is divided into modular segments (module stacks) that can be assembled in series. Each module contains conductors extending from receptacles, and the alignment plate segments the alignment function across multiple conductor positions, allowing each segment to be manufactured within tolerances while maintaining overall alignment
2Reliability
If the circuit board is pressed onto conductors to create press fit connections, then electrical connection reliability improves, but conductor deflection and damage increase
Solution Approach 1:
The alignment plate is positioned beforehand to receive conductors in their correct positions before the circuit board is installed. This preliminary positioning cushions the conductors against misalignment forces during subsequent pressing operations, preventing deflection and damage while ensuring reliable connections
3Strength
If end plates are attached to close the terminal housing, then structural integrity improves, but the cover bows upward and exposes contacts
Solution Approach 1:
Retention members are strategically positioned at specific locations along the cover to provide localized support where needed. This creates non-uniform support distribution that counteracts the bowing tendency at critical points while maintaining overall structural integrity, preventing cover deformation without requiring additional end plate fastening points
Data Source
AI summary
A modular terminal block for connecting leads or wires to an electrical body includes a module stack of side-by-side module assemblies and an alignment plate. Each module assembly includes a housing, a number of conductors extending from the housing, and a cover member to cover the conductors. The alignment plate accurately positions the conductors despite variations in housing dimension due to manufacturing tolerances. The housing includes walls supported on both sides when forming part of the module stack. The walls resist deflection of the conductors during installation of the alignment plate and electrical body. Each cover member engages and is held closed by a conductor extending from the housing.