Trailer Socket Cover Blocking Mechanism
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Solution Overview
Problem
Existing sockets for motor vehicle trailer towing applications lack a convenient and secure mechanism to handle different numbers of electrical contacts and fail to provide a blocking function that can be easily activated or deactivated, with covers often opening in different directions and lacking consistent blocking mechanisms.
Innovation Solution
A socket design with two plug-receiving openings for 7P and 4P connectors, each with a separate hinge pin and bias spring, featuring a blocking mechanism that uses a push-rod and guidance element to ensure covers open in the same direction, with a blocking surface preventing one cover from opening if the other is open, allowing for easy reconfiguration of the blocking function by omitting the push-rod during assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a common biasing element (spring) is used to close both covers, then the structure is simplified, but the two covers open in different rotation directions and the blocking function cannot be deactivated
Solution Approach 1:
The patent divides the single common spring system into two separate biasing elements (first biasing element for first cover, second biasing element for second cover). This segmentation allows each cover to be independently controlled and opened in the same rotation direction, resolving the contradiction between structural simplification and operational consistency.
2Reliability
If a blocking mechanism is provided to prevent simultaneous opening of covers, then safety is improved, but the blocking function cannot be deactivated when not needed
Solution Approach 1:
The patent implements a dynamic blocking mechanism where the blocking element can be positioned in different states. The blocking element is movable along the guidance element and can be engaged or disengaged from the blocking surface, allowing the blocking function to be activated or deactivated as needed. This provides both safety when required and flexibility when not needed.
3Reliability
If a blocking mechanism with movable blocking element and guidance element is added, then cover blocking control is improved, but the device complexity increases
Solution Approach 1:
The patent combines the blocking element with the second cover assembly, integrating the blocking function into the existing cover structure rather than adding a completely separate mechanism. The blocking element is movably connected to the second cover and works in conjunction with the guidance element and blocking surface already present in the socket housing, reducing overall complexity while maintaining reliable blocking control.
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 socket provides secure and easy handling of different electrical contacts, ensuring that only one cover can be opened at a time, enhancing user convenience and reliability, while allowing the blocking function to be optionally disabled by omitting the push-rod, maintaining operational functionality without additional components.
Implementation Method 1
being spring-loaded in the closing direction
Implementation Method 2
hinge-connected to the socket housing by a hinge pin
Data Source
AI summary
A socket with two socket portions having a different number of electrical contacts provides ease of handling and securing. A blocking mechanism for blocking the opening of one cover if the other cover is in an opened position can be provided. A socket can be provided that enables this blocking function to be activated and deactivated by a simple reconfiguration of the socket. A socket with 7P and 4P socket portions has a certain number of shared electrical contacts in the 7P and 4P socket portions.