Fuse Rail Lateral Outlet Contacts Screwless Connection
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Solution Overview
Problem
Existing fuse strips require screws for connecting outgoing lines, which complicates the design and increases the length and complexity of the safety strip, necessitating additional insulation and line paths.
Innovation Solution
A bridge-shaped fuse strip with lateral outgoing contacts and clamping springs allows direct plugging of outgoing lines without screws, eliminating the need for front-side connection terminals and reducing the strip's length and complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If outgoing lines are connected to front-side connection terminals using screws, then reliable electrical connection is achieved, but the fuse strip length and complexity increase
Solution Approach 1:
The patent moves the connection interface from the front side to the lateral side of the fuse strip. By positioning outgoing contacts on the lateral surface rather than requiring front-side terminals with screw connections, the current path is shortened and the overall fuse strip length is reduced while maintaining reliable electrical connection through direct lateral access to contact points
2Reliability
If front-side connection terminals are used with screw connections, then secure electrical connection is achieved, but device complexity and insulation requirements increase
Solution Approach 1:
The patent extracts and eliminates the screw connection mechanism and front-side terminal structure from the fuse strip design. By removing these complex components and replacing them with simplified lateral outgoing contacts that accept direct plug-in connections, the device complexity is reduced while insulation requirements are minimized due to the shorter current paths and compact lateral contact arrangement
Solution Approach 2:
The lateral outgoing contacts are designed to provide self-contained connection functionality on the fuse strip surface itself, eliminating the need for separate front-side terminal blocks and screw fastening mechanisms. The contacts are integrated directly into the fuse strip structure, allowing outgoing lines to be connected directly without requiring additional insulation ribs or complex mounting arrangements
3Ease of operation
If clamping springs are used for screwless connection, then ease of connection is improved, but manufacturing complexity increases
Solution Approach 1:
The patent combines the outgoing contact and clamping spring into a single integrated lateral contact assembly. This merging of functions allows the spring to be positioned directly within the lateral opening, providing automatic clamping action when the outgoing line is inserted, while the entire assembly can be manufactured as an integrated component or pre-assembled unit that simplifies the overall manufacturing process
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 enables a more compact and aesthetically pleasing design with reduced insulation requirements and simplified assembly, as outgoing lines can be connected directly to the fuse strip's lateral contacts, which are automatically locked in place and easily released using a tool.
Implementation Method 1
the lateral outgoing contacts are equipped with clamping springs, which enables the outgoing lines to be connected without screws
Data Source
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AI summary
The fuse rail has a terminal block (10,11,12) per pin on a side of the housing (1) in each case. An outlet contact is contained in each terminal block for screw less attaching of outgoing feeder. Each outlet contact is provided over the respective fuse element of an electric circuit to the associated contact element for contacting of a bus bar. Each terminal block has a guidance (18,19,20) for inserting outgoing feeder.