Switch Break Mechanism With Auto-Reset Handle for Free Tripping
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Solution Overview
Problem
Traditional solid-state circuit breakers with mechanical break modules have three stable states, requiring users to reset the rotary handle after tripping, causing operational inconvenience and affecting user experience due to imperfect free tripping functionality.
Innovation Solution
A break mechanism with a contact driving assembly, handle assembly, and auxiliary assembly that allows the handle to return to the open position after tripping, reducing stable states to two (open and closed), enabling single-action operation and enhancing user experience through improved free tripping functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional mechanical break module with three stable states is used, then reliable electrical isolation is achieved, but user operation convenience deteriorates due to requiring handle reset after tripping
Solution Approach 1:
The patent extracts the handle reset function from the manual operation domain and assigns it to the auxiliary assembly which automatically resets the handle to the open position after tripping. This separation allows the mechanical break module to maintain its three-state reliability while the auxiliary assembly eliminates the operational inconvenience of manual resetting.
Solution Approach 2:
The auxiliary assembly provides self-service by automatically resetting the handle to the open position after tripping occurs, eliminating the need for user intervention to reset the rotary handle. This self-resetting mechanism maintains the reliable electrical isolation of the three-state system while improving ease of operation.
2Stability of the object's composition
If a mechanical break module with three stable states is used, then stable switching positions are achieved, but device complexity increases due to additional stable states requiring management
Solution Approach 1:
The auxiliary assembly acts as an intermediary between the tripping mechanism and the handle assembly. It mediates the transition from the tripped state back to the open state, managing the complexity of state transitions automatically without requiring user intervention to navigate between the three stable states.
Solution Approach 2:
The auxiliary assembly performs preliminary action by automatically positioning the handle in the open position before any manual closing operation is attempted. This preliminary resetting action simplifies the overall system operation by ensuring the handle is always in a known initial position after tripping.
3Power
If the telescopic driving part keeps length unchanged during rotation, then efficient force transmission is achieved, but the driven part may be damaged during reverse rotation
Solution Approach 1:
The telescopic driving part dynamically changes its length based on the rotation direction. During forward rotation (closing operation), it maintains constant length for efficient force transmission. During reverse rotation (after tripping), it retracts to reduce the transmission ratio and prevent damage to the driven part, thus adapting its mechanical properties to different operational phases.
Solution Approach 2:
The patent changes the geometric parameter (length) of the telescopic driving part based on operational conditions. By varying the length parameter, the system maintains high force transmission efficiency during normal operation while protecting the driven part during abnormal reverse rotation conditions.
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 break mechanism simplifies user operations by allowing single-action opening or closing and improves the reliability and user experience by ensuring only two stable states, facilitating convenient and reliable switching apparatus operation.
Implementation Method 1
the telescopic driving part adapted to be coupled with the driven part, and keeping a length unchanged during a rotation of the handle assembly in a first rotation direction to drive the contact driving assembly to rotate in a second rotation direction opposite to the first rotation direction
Implementation Method 2
a torsion spring adapted to provide an elastic force to allow the contact driving assembly to rotate in the first rotation direction
Implementation Method 3
an electromagnetic driving component comprising a push rod which is operable to push the auxiliary assembly to move to the second position in the first moving direction when tripping
Implementation Method 4
an elastic member coupled to the auxiliary assembly and adapted to provide an elastic force when the auxiliary assembly is in the second position, so as to allow the auxiliary assembly to move in a second moving direction opposite to the first moving direction
Data Source
Figure 1
Figure 2
Figure 3A~3B
AI summary
Embodiments of the present disclosure provides a break mechanism for a switching apparatus and a switching apparatus. The break mechanism comprises a contact driving assembly, comprising a driven part and coupled to a moving contact to drive the moving contact to move between an open position and a closed position; a handle assembly adapted to rotate around a pivot shaft and comprising a relevant driving part and a telescopic driving part which is telescopic, the telescopic driving part keeping a length unchanged during a rotation of the handle assembly in a first rotation direction to drive the contact driving assembly to rotate in a second rotation direction, thereby driving the moving contact to move to the closed position, and the telescopic driving part adapted to retract during a rotation of the handle assembly in the second rotation direction to avoid the driven part; and an auxiliary assembly coupled to the relevant driving part, and adapted to move to a second position in a first movement direction during tripping of the switching apparatus, thereby causing the handle assembly to rotate in the second rotation direction. The break mechanism is easy to operate and difficult to mis-operate, and can better support the free tripping function.