Crown-Type Hanger Sizer With Snap-Lock Anti-Removal Structure
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Solution Overview
Problem
Existing crown-type sizers for hangers are easily detachable, leading to risks of product exchange and potential ingestion by children, and are not suitable for plastic hangers with hooks at angles other than 90°, as they compromise the hanger's integrity and cannot be easily applied.
Innovation Solution
A crown-type sizer with a peripheral wall featuring trapezium-shaped longitudinal and rectangle-shaped transverse sides, including protrusion bosses that engage with the hanger's groove and protrusion, providing a snap-in locking mechanism that secures the sizer to the hanger, even when the hook extends at an angle other than 90°, ensuring stability and resistance to removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the crown-type sizer is made easily detachable from the hanger, then the ease of operation is improved, but the reliability deteriorates due to risks of product exchange and potential ingestion by children
Solution Approach 1:
The sizer is designed with a dynamic engagement mechanism where the protrusion boss transitions from a free state during insertion to a locked state during use. The protrusion boss can freely pass through the groove during application but automatically engages with the protrusion in the groove to lock the sizer in place, providing both ease of operation and reliability.
2Reliability
If the crown-type sizer is assembled in an integral manner to prevent removal, then the reliability is improved, but the ease of operation deteriorates and the device complexity increases
Solution Approach 1:
The sizer is segmented into a body and a protrusion boss that can move independently relative to the body. This segmentation allows the protrusion boss to be inserted separately through the groove and then locked into place, providing a simple two-step application process that maintains ease of operation while ensuring reliable attachment.
3Manufacturing precision
If the crown-type sizer is designed for metal hangers with 90° hooks, then the manufacturing precision is improved, but the adaptability deteriorates when applied to plastic hangers with angled hooks
Solution Approach 1:
The sizer is designed with a universal engagement mechanism that works with both metal and plastic hangers. The protrusion boss can engage with the groove and protrusion structure regardless of the hanger material or hook angle, making the sizer adaptable to various hanger types including plastic hangers with angled hooks.
4Reliability
If the crown-type sizer is made resistant to twisting and rotation, then the reliability is improved, but the device complexity increases
Solution Approach 1:
The protrusion boss is designed with an asymmetric shape that corresponds to the asymmetric groove structure. This asymmetric design creates a natural anti-twisting mechanism where the protrusion boss fits snugly against the groove walls, preventing rotation and twisting without requiring additional complex structural elements.
Data Source
AI summary
The crown-type sizer is mounted on a plastic hanger which includes a body and a hook that extends angularly upwards from the mid-point of the body. The sizer is characterized in having a peripheral wall that defines two open bases to allow the sizer to pass over the hook and at least one protruding boss on an inner part of wall to engage itself onto the hanger and thus block the sizer onto said hanger in a stable manner.