Terminal Module Sliding Catch for Spark-Free Subassembly Connection
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Solution Overview
Problem
Existing modular electrical control systems face challenges in safely disconnecting and reconnecting power supply modules without sparking, especially when the subassembly is encapsulated or potted, making it difficult to implement traditional locking mechanisms.
Innovation Solution
A terminal module with a sliding catch mechanism that uses a switching cam to ensure mechanical retention and automatic disconnection of electrical contacts during insertion or removal, utilizing a thrust piece like a compression spring to maintain a defined position and prevent arcing or sparking, along with fixing means to secure the module in place.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional locking mechanism is integrated into the subassembly, then the subassembly can be securely retained, but it becomes impossible to implement when the subassembly is encapsulated or potted
Solution Approach 1:
The locking mechanism is segmented into two parts: a catch element integrated into the terminal module and a corresponding engagement element on the subassembly. This segmentation allows the locking mechanism to be implemented externally on encapsulated subassemblies without requiring internal modifications.
Solution Approach 2:
The catch element acts as an intermediary between the terminal module and the subassembly, providing a mechanical retention interface that works with both encapsulated and non-encapsulated subassemblies. The catch element mediates the locking function without being integrated into the subassembly itself.
2Object-affected harmful factors
If the electrical contact is forced to open during plugging in and pulling out, then sparking is prevented, but the locking mechanism becomes more complex
Solution Approach 1:
The electrical contact opening function is merged with the mechanical locking/unlocking action. The catch element's movement during locking/unlocking automatically opens the electrical contacts, combining two safety functions into a single mechanical operation.
Solution Approach 2:
The catch element automatically opens the electrical contacts during its movement, without requiring a separate control mechanism. The mechanical motion of the catch itself triggers the contact opening, making the system self-regulating.
3Stability of the object's composition
If the catch is moved against a thrust piece like a compression spring, then a defined position is maintained and positive-fit connection is ensured, but the device complexity increases
Solution Approach 1:
The compression spring acts as a counterforce element, providing a thrust that maintains the catch in a defined position. The spring's elastic force balances the locking forces, ensuring stable positioning without requiring complex control mechanisms.
Solution Approach 2:
The compression spring provides cushioning force before the catch reaches its final locked position, absorbing shocks and ensuring smooth operation. This beforehand cushioning prevents mechanical impacts and maintains stable positioning.
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
Ensures safe and spark-free operation by maintaining a positive-fit connection while allowing easy insertion and removal of subassemblies, preventing arcing or sparking during voltage supply changes and ensuring correct operation by locking the catch until the terminal module is securely fixed.
Implementation Method 1
the catch being able to move against a force produced by a thrust piece, in particular a compression spring
Data Source
AI summary
Retention of replaceable subassemblies, with automatic forced disconnection. The invention relates to a terminal module 1 for locking a subassembly or a PS module 2 on the terminal module in a way that satisfies safety requirements. The subassembly 2 is hinged onto the terminal module 1. The terminal module 1 has a sliding catch 3 for fixing the subassembly 2 on the terminal module 1. Disconnection of electrical contacts is guaranteed during the hinging-on.