Card Key Reinforcement for Breakage Prevention

The patent applies local quality by adding reinforcement parts specifically at the corner and rim portions where breakage is most likely to occur. These reinforcement parts are strategically positioned to provide enhanced structural rigidity only where needed, rather than increasing the thickness of the entire card key body. This allows the card key to maintain thin overall dimensions while having localized strength enhancements at critical areas.

The patent employs composite materials by combining the base card key structure with additional reinforcement parts made of suitable materials. The reinforcement parts are integrated with the main body through coupling structures, creating a composite construction that provides enhanced structural rigidity at critical locations without significantly increasing the overall thickness of the card key.

The patent applies merging by integrating the reinforcement parts with the main card key body through coupling structures. The reinforcement parts are designed to be combined with the existing body structure rather than being separate add-on components, thereby enhancing breakage prevention while minimizing the increase in overall device complexity. The coupling structures facilitate this integration and maintain structural coherence.

The patent uses segmentation by dividing the reinforcement function into separate reinforcement parts that can be independently designed and integrated. These segmentation allows for modular construction where reinforcement parts can be added to specific locations (corners and rims) without redesigning the entire card key structure, thus managing complexity through modular assembly.