Test Plug Block Locking Mechanism for Controlled Terminal Release
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Solution Overview
Problem
Existing test plug blocks for electrical terminal blocks face challenges in ensuring stable and defined electrical states during insertion and removal, with risks of unstable or undefined electrical connections due to improper handling, such as quick or uneven withdrawal, which can compromise the sequence of contact area separation.
Innovation Solution
A locking element in the test plug block is designed to be adjustable between two positions, allowing for controlled two-stage withdrawal by a rotational movement of the handle, featuring a locking hook and stop surfaces to ensure secure engagement and disengagement with the terminal block.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If contact elements are inserted into recesses of opposite polarity during testing, then electrical connection is established for testing, but the connection must be manually separated afterwards requiring additional time
Solution Approach 1:
The test plug block automatically separates the contact elements from the recesses after testing by reversing the insertion motion, eliminating the need for manual separation. The same actuator that performs insertion also performs separation, making the system self-serving and reducing testing time.
Solution Approach 2:
The system transitions from a static connected state to a dynamic state where connection and separation are performed through controlled motion. The actuator dynamically adjusts the position of the test plug block to establish and break electrical connections as needed during testing.
2Adaptability or versatility
If a test cable with separate contact elements is used, then flexibility is provided, but the test cable represents a separate component requiring additional handling
Solution Approach 1:
The patent combines the test cable functionality with the test plug block by integrating the contact elements directly into the test plug block structure. This merging eliminates the need for a separate test cable while maintaining the flexibility to connect different contact elements to different recesses.
3Reliability
If contact elements are firmly connected to ensure stable electrical contact, then connection stability is improved, but separation requires additional time and effort
Solution Approach 1:
The system uses controlled dynamic motion to both establish firm connections during insertion and enable easy separation through reversal of the same motion. The actuator applies sufficient force for stable contact during insertion, then uses the same mechanical advantage to cleanly separate the components without requiring additional effort.
Data Source
Figure 1
Figure 2
Figure 3.1~3.2
AI summary
The invention relates to a test plug block (1) for plugging onto a series terminal block (2), comprising a plurality of test plugs (4) connected to one another and two fastening parts (5), which are arranged on both sides of the plurality of test plugs (4) and are connected to one another by means of a grip piece (6), the fastening parts (5) each having a housing (7) and an insertion portion (8), which can be inserted into a receiving portion (9), the receiving portion (9) being formed in the clamp housing (10) of a fastening clamp (11) of the series terminal block (2).