L-Shaped Terminal Assembly for Tension Spring Switches

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Solution Overview

Problem

Power switches based on tension spring technology lack a simple and economical solution to achieve a 1 inch air gap and a 2 inch creepage distance, which are essential for electrical safety and space efficiency, particularly in multistory terminal units where space is limited.

Innovation Solution

A terminal assembly with an L-shaped base body, featuring latching and snap-fit hooks for secure attachment, phase separating walls for heat dissipation, and guided fastening to ensure a 1 inch air gap and 2 inch creepage path, integrated as a cost-effective attachment part for tension spring power switches.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If an additional terminal (E-type terminal) is used to achieve 1 inch air gap and 2 inch creepage distance in screw-type devices, then electrical safety requirements are met, but device complexity and cost increase

Engineering Contradiction:
Improveelectrical safetyVSAvoidterminal structure
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The patent combines the air gap function and creepage distance function into a single terminal structure. The L-shaped base body with integrated phase separating walls creates both the required 1 inch air gap and 2 inch creepage path without needing separate additional terminals, thus meeting electrical safety requirements while reducing device complexity

Inventive Principle:
Principle #5Merging (Combining)

Solution Approach 2:

The patent uses the L-shaped configuration of the base body to utilize three-dimensional space efficiently. By arranging terminal points and phase separating walls in different spatial dimensions, the design achieves the required electrical isolation distances without increasing the overall footprint or requiring additional terminal components

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

2Quantity of substance

If multistory terminal units are used to accommodate a large number of terminal points, then terminal capacity increases, but space requirement for housing interior increases

Engineering Contradiction:
Improvenumber of terminal pointsVSAvoidhousing interior space
Core Design Contradiction:
Quantity of substanceVSVolume of stationary object

Solution Approach 1:

The patent integrates multiple terminal points and phase separating walls within a compact L-shaped base body structure. The phase separating walls are nested within the terminal assembly itself, allowing multiple terminal points to be arranged in a space-efficient manner that reduces the overall housing interior space requirement while maintaining the necessary electrical isolation

Inventive Principle:
Principle #7Nested doll (Nesting)

Data Source

PatentUS8987619B2Terminal assembly for a power switch in tension spring technology
Publication Date: 2015.03.24 SIEMENS AG
  • US8987619B2 patent drawing
  • US8987619B2 patent drawing
  • US8987619B2 patent drawing

AI summary

A terminal assembly for a power switch for electrical contact to terminal points which are designed to receive electrical lines. The terminal assembly of at least one embodiment is arranged on a tension-spring-based power switch.