Electrical Switch Latch Assembly Vibration Resistance
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Solution Overview
Problem
Existing latch assemblies in electrical switch assemblies are prone to dislodgment due to shock and vibrations, leading to unintended disconnection of the switch operator from the contact block, which affects the operational state of controlled equipment.
Innovation Solution
A novel latch assembly with a collar and housing design that includes retention features such as tabs and slots, and apertures for fasteners, allowing for secure locking and easy disengagement, preventing unintended movement due to vibrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a latch assembly uses simple snap features for connection, then ease of assembly and disconnection is improved, but reliability deteriorates due to dislodgment from shock and vibrations
Solution Approach 1:
The latch assembly is divided into distinct functional components: a collar with retention features for securing the operator, a housing with apertures for fastener reception, and a spring mechanism for automatic resetting. This segmentation allows each component to be optimized independently - the collar provides secure retention while the housing enables easy fastener access, resolving the contradiction between connection security and ease of assembly.
Solution Approach 2:
The latch assembly incorporates a spring mechanism that enables dynamic movement between locked and unlocked states. The spring automatically resets the latch after actuation, providing both secure locking during operation and easy reset capability. This dynamic behavior allows the system to maintain reliability during normal operation while enabling convenient ease of operation when resetting is needed.
2Reliability
If fasteners are used to secure the contact block to the latch assembly, then reliability is improved by preventing dislodgment, but device complexity increases due to additional components and assembly steps
Solution Approach 1:
The housing apertures serve multiple functions: they provide access for fasteners to secure the contact block, they allow visual inspection of the latching mechanism status, and they enable tool access for actuation. This multi-functionality reduces the need for separate inspection and actuation features, thereby reducing overall device complexity while maintaining reliability through proper fastening.
Solution Approach 2:
The latch assembly is designed to be self-latching through the spring mechanism that automatically engages the collar with the housing when the operator is actuated. This self-latching action eliminates the need for complex locking mechanisms or additional fasteners to maintain the secured state during normal operation, reducing device complexity while ensuring reliability.
Data Source
AI summary
A latch assembly is provided for securing a switch operator to a contact block. The latch assembly includes a collar designed to retain the switch operator in the latch assembly. The latch assembly also includes a housing having one or more apertures for receiving fasteners to secure the contact block to the latch assembly. The collar is displaceable within the housing between a locked position that secures the switch operator and an unlocked position that permits disengagement of the switch operator from the collar. When the collar is in the locked position, corresponding apertures in the collar align with the one or more apertures in the housing, permitting the fasteners to be inserted through the collar apertures. Insertion of the fasteners through the collar apertures secures the collar in the locked position, thereby impeding unintentional disconnection of the switch operator from the latch assembly.