Playard Changing Table Folding Joint to Prevent Accidental Collapse
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Solution Overview
Problem
Conventional changing tables for playards can accidentally collapse when a baby or the table is moved, potentially harming the child and caregiver due to unintentional pivoting of folding arms, and they are costly to manufacture.
Innovation Solution
A folding mechanism comprising first and second cylindrical joints with arcuate plates and stops that cooperate to prevent accidental collapse, allowing the changing table to be easily moved between operation and storage positions using a single-handed operation, preventing accidental folding or pressing down.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the folding arms are designed to pivot about the pivot joint, then the changing table can be swung to storage position, but accidental pivoting may occur when the baby is placed or moved on the changing table
Solution Approach 1:
The patent applies preliminary anti-action by incorporating a latch mechanism that preemptively prevents unintended pivoting of the folding arms. The latch engages with the folding arms to lock them in the extended position, counteracting any forces that might cause accidental collapse before such collapse can occur. This resolves the contradiction by maintaining reliability while preserving the intended ease of operation through deliberate user activation of the latch release.
2Ease of manufacture
If conventional changing tables use simple folding arms, then manufacturing cost is reduced, but they lack protection against unintentional folding or pressing down
Solution Approach 1:
The patent introduces a latch mechanism as an intermediary component between the folding arms and the external environment. This latch acts as a mediator that blocks unintended folding motions while allowing controlled operation. The latch adds minimal complexity to the manufacturing process but significantly reduces harmful factors by preventing accidental collapse that could harm the child or caregiver.
3Adaptability or versatility
If the changing table is designed to be removable or swingable, then it provides flexibility in use, but it may fold or press down unintentionally when the baby is on it
Solution Approach 1:
The patent applies dynamics by creating a system that transitions between two states: a locked stable state during use and an unlocked flexible state for storage or removal. The latch mechanism enables this dynamic behavior by allowing the structure to be deliberately changed from stable to flexible configuration. When engaged, the latch provides structural stability; when disengaged, the system becomes flexible for repositioning, thus resolving the contradiction between adaptability and stability.
Data Source
AI summary
This invention relates to a folding mechanism for a playard, which comprises first and second joints substantially cylindrical in shape. The joints have arcuate plates and stops that cooperative with each other to effect the rotation between the joints, so that the changing table can be moved between an operation position and a storage position. This invention may avoid accidental collapse of the changing table, and enable the users to conveniently fold/unfold the changing table single handed.