Replaceable Fuse Casing with Hook Arms for Indicator Reuse
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Solution Overview
Problem
Existing fuse assemblies with indicator lights often result in unnecessary environmental pollution due to the disposal of undamaged light members, and lack a secure mechanism to ensure proper cap positioning during installation and removal.
Innovation Solution
A fuse assembly design featuring a cap with hook arms that securely engage with positioning members on the casing, allowing the cap with the light member to be reused while only replacing the casing, and incorporating anti-slip features for easy handling and secure attachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the whole fuse assembly including the light member is replaced when the fuse is burned, then the fuse assembly can be easily replaced, but the light member is discarded unnecessarily causing environmental pollution
Solution Approach 1:
The fuse assembly is divided into separable components: the casing containing the conductive member and fuse, and the cap containing the light member. This segmentation allows the cap to be reused while only replacing the casing when the fuse blows, thereby reducing waste of the light member while maintaining ease of replacement.
Solution Approach 2:
The design enables recovery and reuse of the cap with the light member after fuse replacement. Instead of discarding the entire assembly, the functional cap is retained and reused with a new casing, reducing material waste while maintaining the indicator function.
2Ease of operation
If the cap is detachably mounted to the casing without positioning members, then the cap can be easily removed, but the cap may move due to impact causing improper contact between blades and legs
Solution Approach 1:
Positioning members (protrusions on casing, recesses on cap) are designed in advance to guide and ensure proper alignment of the cap with the casing during assembly. This preliminary positioning action prevents misalignment and ensures reliable contact between blades and legs before the cap is fully attached.
Solution Approach 2:
The positioning members act as intermediaries between the cap and casing, mediating their relative positions. The protrusions and recesses engage to maintain proper alignment, ensuring that the conductive blades properly contact the light member legs while still allowing easy removal.
3Reliability
If the cap is securely attached to prevent loosening from impact, then the connection is reliable, but the installation and removal process becomes more difficult
Solution Approach 1:
The attachment mechanism provides dynamic characteristics: it allows easy insertion and attachment in the installation direction, while providing secure resistance to loosening in the opposite direction through the hook-shaped arms engaging with the casing. This dynamic behavior satisfies both ease of operation and connection stability.
Solution Approach 2:
The cap combines multiple functions: it serves as the removable cover for easy access, incorporates the light member for indication, and includes positioning features for secure attachment. This merging of functions achieves reliable connection without significantly complicating the installation and removal process.
Data Source
AI summary
A fuse assembly includes a casing having two slots defined through the first end thereof, and a conductive member is located in the casing and has a first end extending through the second end of the casing. The conductive member includes two blades with a fuse connected therebetween. A cap is detachably mounted to the first end of the casing and has a light member connected thereto. The light member has a leg portion which is electrically connected to a second end of the conductive member. The cap includes two arms which are detachably hooked to two positioning members on two sides of the casing to ensure the connection between the cap and the casing. When the fuse is burned off, the light member lights on, the cap is removed from the casing, and is detachably connected to a new casing with a functional fuse therein.