Height-Adjustable Play Yard Changing Table With Entrapment Guard
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional play yard changing tables have fixed heights, limiting their vertical movement and creating head entrapment issues due to ASTM standards, which restrict their range of operation and convenience.
Innovation Solution
A height-adjustable and pivotable changing table with a downwardly extending guard member that prevents head entrapment, allowing greater vertical movement without violating ASTM standards, and is integrated with a locking mechanism for secure height adjustment within the play yard frame.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the changing table is made height-adjustable to improve caregiver convenience, then the vertical movement range increases, but head entrapment risks arise between the changing table frame and play yard frame
Solution Approach 1:
A guard member is introduced as an intermediary element between the changing table frame and play yard frame. This guard member physically blocks the hazardous opening, preventing head entrapment while allowing the changing table to achieve greater vertical movement range for caregiver convenience.
Solution Approach 2:
The changing table frame is segmented by adding a separate guard member component. This segmentation allows the main frame to move vertically for adjustment while the guard member remains positioned to block the hazardous opening, resolving the contradiction between movement range and safety.
2Length of moving object
If the changing table frame is positioned closer to the play yard frame to maximize vertical movement range, then the range of motion increases, but ASTM compliance is violated due to head entrapment openings
Solution Approach 1:
The guard member serves as a mediator that allows the changing table frame to be positioned close to the play yard frame for maximum vertical movement range, while simultaneously blocking the opening to maintain ASTM compliance and prevent head entrapment.
Solution Approach 2:
The guard member is configured to move with the changing table frame during vertical adjustment, dynamically maintaining its protective function across the full range of motion while ensuring continuous ASTM compliance at all positions.
3Object-affected harmful factors
If a guard member is added to prevent head entrapment, then safety is improved, but device complexity increases
Solution Approach 1:
The guard member is designed as a separate, simple segmented component that can be easily attached to the changing table frame. This segmentation minimizes the increase in device complexity while effectively preventing head entrapment, as the guard member functions as an independent safety element rather than complicating the main frame structure.
Data Source
AI summary
A changing table is mounted on the frame of a play yard to be vertically adjustable in operative height and pivotally movable between operative and inoperative positions. The frame of the changing table is provided with a downwardly extending guard member that extends across the opening between the frame of the changing table and the frame of the play yard to prevent a child's head from being trapped in the opening. The use of the guard member enables the changing table to be moved through a greater vertical range of operative positions without violating ASTM standards regarding the passage of probes through frame openings. The height adjustment mechanism is mounted within the vertical frame member of the play yard and the vertical mounting member of the changing table to allow the changing table to be raised and lowered with respect to the upper frame members of the play yard.