Fuse Device Microswitch Interlocking Mechanism
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Solution Overview
Problem
The existing high voltage switching devices with fuse wire mounting interlocking mechanisms have complex structures and high costs, leading to labor-intensive mounting processes and prolonged assembly times, and fail to effectively manage phase-loss operations during overcurrent or short circuits.
Innovation Solution
A simplified fuse device with a microswitch, comprising a fuse device interlocking mechanism, a fuse wire strike pin component, and a linkage, where the strike pin piece and trigger piece are radially fixed on a main shaft and axially movable, cooperating with the interlocking plate and tension spring to drive the linkage and trigger the microswitch for proper switching operations, regardless of fuse wire mounting or fusion states.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional fuse wire mounting interlocking mechanism is used, then the switching device can detect fuse wire absence or fusion states, but the structure becomes complicated and costs increase
Solution Approach 1:
The patent combines the mounting interlocking function and the fuse wire fusion detection function into a single integrated mechanism. The strike pin component serves dual purposes: it prevents switching device closing when fuse wires are absent (mounting interlocking) and triggers the microswitch when fuse wires are fused (fusion detection). This merging eliminates the need for separate detection mechanisms, thereby reducing structural complexity while maintaining reliability.
Solution Approach 2:
The strike pin component is designed as a multi-functional element that performs both mounting interlocking and fusion detection tasks. By making this component universal, the patent reduces the total number of components needed in the system, simplifying the overall structure without compromising the ability to detect both mounting status and fusion states of fuse wires.
2Reliability
If a traditional fuse wire mounting interlocking mechanism is used, then the switching device can detect fuse wire absence, but the mounting process becomes labor-intensive and time-consuming
Solution Approach 1:
The fuse wire mounting process is designed to be self-verifying through the strike pin component. When fuse wires are correctly mounted, they automatically push the strike pin into the engaged position, which self-activates the microswitch to indicate proper mounting. This self-service mechanism eliminates the need for manual verification steps, reducing labor intensity and accelerating the mounting process while ensuring reliability.
3Reliability
If one or two phases of fuse wires are fused by overcurrent or short circuit, then the fault current opens the switching device, but phase-loss operation may cause damages to user's device
Solution Approach 1:
The patent implements a feedback mechanism where the strike pin component continuously monitors the fusion state of each phase fuse wire and provides immediate feedback to the microswitch. When any fuse wire is fused, the strike pin is triggered to activate the microswitch, which then prevents the switching device from closing. This feedback loop ensures that the system responds immediately to fusion events, preventing phase-loss operation and protecting user devices from damage.
4Device complexity
If a simplified fuse device structure is used, then production costs and assembly time are reduced, but the ability to trigger microswitch for phase-loss protection may be compromised
Solution Approach 1:
The patent extracts the essential protection function from complex traditional mechanisms and concentrates it into the strike pin component. By taking out only the critical detection and triggering functions and embedding them in the strike pin, the patent achieves structure simplification while maintaining the reliability of phase-loss protection. The strike pin serves as a standalone component that handles both mounting interlocking and fusion detection, eliminating unnecessary complexity.
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 solution reduces production costs and assembly time by simplifying the structure, enabling efficient modularized assembly and ensuring proper switching operations by triggering the microswitch based on fuse wire states, thereby preventing phase-loss damages.
Implementation Method 1
an interlocking plate (502), and a tension spring (503)... the strike pin piece is pushed away under an action of the interlocking plate
Implementation Method 2
a linkage (7) and a microswitch (2)... a return spring (8), wherein one end of the linkage (7) is coupled to the trigger piece (603)
Data Source
Figure 1A
Figure 1B
Figure 2A~2B
AI summary
Disclosed is a fuse device with a micro-powered switch comprising a micro-powered switch (2), a fuse device interlocking mechanism (5), a fuse wire striker pin assembly (6) and a connecting rod (7), wherein the fuse wire striker pin assembly (6) comprises a main shaft (601), striker pin pieces (602) and trigger pieces (603); the striker pin pieces (602) and the trigger pieces (603) are radially fixed on the main shaft (601), and can axially move around the main shaft (601); and when one or more fuse wires are not installed, or when one or more fuse wires have fused, the fuse device interlocking mechanism (5) cooperates with the fuse wire striker pin assembly (6) and drives the connecting rod (7) to trigger the micro-powered switch (2), whereby the switch device cannot close. The fuse device with a micro-powered switch has a simpler structure, effectively reducing production costs, and the modularised assembly saves on assembly time.