PCB Clamping Unit Layout for Compact High-Clearance Terminals
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Solution Overview
Problem
Existing PCB terminal blocks require significant space and are difficult to attach due to limitations in design, leading to increased costs and complexity in connecting electrical conductors, especially when using ferrules with larger cross-sections and requiring precise spacing and clearance.
Innovation Solution
The terminal unit decouples the positioning of contact elements and receiving chambers, with contact elements offset from the central axis of receiving chambers, allowing for increased clearance and creepage distances, enabling compact design and efficient use of space without increasing dimensions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the terminal unit uses a compact arrangement of contact elements and receiving chambers aligned on the same axis, then the space requirement is reduced, but the clearance and creepage distances between electrical contacts are insufficient
Solution Approach 1:
The patent offsets the contact element from the central longitudinal axis of the receiving chamber, creating a lateral displacement in the horizontal plane. This dimensional shift allows the contact element to be positioned closer to the edge of the terminal unit while maintaining sufficient distance from adjacent electrical contacts, thereby reducing overall space requirements without compromising clearance and creepage distances.
2Adaptability or versatility
If the terminal unit accommodates ferrules with larger cross-sections, then conductors with larger cross-sections can be connected, but the space requirement and device dimensions increase
Solution Approach 1:
The receiving chamber is designed with specific local geometric features including an enlarged opening region and a tapered interior space that accommodates ferrules of various cross-sections. This localized adaptation of the chamber geometry allows the terminal unit to handle different conductor sizes without proportionally increasing the overall device dimensions, as the accommodation space is concentrated in specific regions rather than uniformly distributed.
3Ease of operation
If the terminal unit is designed with accessible actuating elements for clamping and releasing conductors, then the ease of operation is improved, but the device complexity and space requirement increase
Solution Approach 1:
The actuating element is integrated into the housing structure of the terminal unit, merging the operational mechanism with the structural component. This combination allows the housing to serve dual purposes: providing structural support and containing the clamping mechanism. The actuating element operates through the housing wall, enabling conductor clamping and releasing functions without adding separate external components, thereby improving ease of operation while minimizing device complexity.
Data Source
AI summary
A clamping unit electrically contacts electric contacts with electric conductors and may include electrically conductive clamping elements, each of which has a contact element for electrically connecting to one of the electric contacts and a connection terminal for contacting one of the electric conductors. The contact elements are arranged on the lower face of the clamping unit, and the connection terminals are arranged in receiving chambers for receiving the electric conductors. The longitudinal axis of the contact element is axially offset relative to the central longitudinal axis of the receiving chamber in which the corresponding connection terminal is arranged for multiple clamping elements. The longitudinal axis of each contact element has a greater distance to the edge than the central longitudinal axis of the corresponding receiving chamber in which the corresponding connection terminal is arranged.A clean version of the Abstract with no markings may be found on the last page of this paper, following the signature page.