Single-Piece Child-Resistant Cap With Press-and-Turn Locking
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Solution Overview
Problem
Existing child-resistant caps are bulky, difficult to open, expensive to manufacture, and require multiple parts, compromising ease of use and safety.
Innovation Solution
A single-piece cap design with a snap-fit mechanism, adjustable to various container sizes, featuring a flexible arm structure, ergonomic grips, and a tamper-evident seal, ensuring secure closure and easy adult access while preventing child access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multi-part cap design is used, then child-resistant security is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent combines multiple functional elements (cap body, locking mechanism, seal, and child-resistant features) into a single integrated cap structure. This eliminates the need for separate inner and outer caps while maintaining child-resistant security through integrated locking tabs and resilient arms that engage with the container neck.
Solution Approach 2:
The single-part cap design incorporates multiple functions within one structure: sealing the container, preventing child access through locking mechanisms, providing tamper evidence, and ensuring adult accessibility. The resilient arms and locking tabs perform both sealing and child-resistant functions simultaneously.
2Reliability
If multi-part cap design is used, then child-resistant security is improved, but manufacturing cost and assembly time increase
Solution Approach 1:
The patent combines multiple functional elements (cap body, locking mechanism, seal, and child-resistant features) into a single integrated cap structure. This eliminates the need for separate inner and outer caps while maintaining child-resistant security through integrated locking tabs and resilient arms that engage with the container neck.
3Ease of operation
If traditional screw cap design is used, then ease of opening is improved, but child-resistant security deteriorates
Solution Approach 1:
The cap incorporates resilient arms that can dynamically deflect during the opening process. When adult force is applied, the arms flex to allow the locking tabs to disengage from the container neck, providing ease of opening. For children, the arms remain engaged, maintaining child-resistant security.
Solution Approach 2:
The locking mechanism changes its engagement parameter based on applied force. Under normal conditions, the locking tabs are securely engaged with the container neck. When sufficient force is applied (by adults), the resilient arms deflect and the tabs disengage, allowing easy opening.
4Ease of manufacture
If fixed cap design is used, then manufacturing simplicity is improved, but adaptability to different container sizes deteriorates
Solution Approach 1:
The cap incorporates resilient arms that can dynamically deflect during the opening process. When adult force is applied, the arms flex to allow the locking tabs to disengage from the container neck, providing ease of opening. For children, the arms remain engaged, maintaining child-resistant security.
Data Source
AI summary
The present invention relates to a child-resistant cap (100) designed to securely close a container (200) with a locking system that requires adult-like manual dexterity to open. The cap features a roof (50) that engages with the mouth (52) of the container, at least one tab (24) connected to a base body (42) via a flexible member (30), and a protruded edge (60) that locks onto the transfer bead (40). The cap also includes bolting means (34) that interacts with holding means (36) and a barrier wall (38). The arm structure (28) provides flexibility to the roof (50), allowing it to adjust to various container types. An optional tamper-evident seal member (72) indicates prior opening. The cap (100) requires pressing the tab (24) while unscrewing to unlock, ensuring child resistance. The single-part design simplifies manufacturing, reduces costs, and makes it suitable for various hazardous substances.