High Chair Tray Post-and-Socket Rollers for Easy Adjustment
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Solution Overview
Problem
High chair tray systems face challenges with friction between tray posts and sockets, making it difficult to adjust and remove trays, especially requiring two hands and causing frustration for caregivers.
Innovation Solution
Incorporating rollers on the tray posts and within the high chair sockets to facilitate smooth insertion and adjustment, along with a common actuation mechanism accessible when the larger tray is mounted, allowing for one-handed positioning and positional adjustment of both upper and lower trays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a post and socket tray mounting design is used, then the tray offers a strong interlocking connection with the high chair structure, but high amounts of friction between post and socket make it difficult to adjust and remove the tray
Solution Approach 1:
A roller mechanism is introduced as an intermediary element between the tray post and the socket. The roller is mounted on the post and rotates within the socket, serving as a mediator that reduces friction while maintaining the structural connection. This allows the tray to be easily adjusted and removed without compromising the interlocking strength when needed.
Solution Approach 2:
The traditional direct sliding mechanical connection between post and socket is replaced with a rolling mechanism. Instead of the post sliding directly against the socket walls (high friction), the roller rotates within the socket, converting sliding friction into rolling friction, which is significantly lower and enables easy tray adjustment and removal.
2Device complexity
If the snack tray is directly attached to the high chair seat, then the tray structure is simplified, but the caregiver must lift the child up and over the tray to seat or remove the child
Solution Approach 1:
The tray system transitions from a static, fixed attachment to a dynamic, adjustable configuration. The roller-mounted post allows the tray to be easily moved, adjusted, and removed, enabling the caregiver to adapt the tray position or remove it entirely to facilitate child seating and removal without lifting the child over a fixed barrier.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The tray system can be easily mounted and adjusted without friction issues, enabling single-handed operation and accommodating different child sizes, enhancing user convenience and tray system durability.
Implementation Method 1
The friction problem is typically resolved in a limited manner by using dissimilar materials for the tray post and high chair socket components. While dissimilar materials do alleviate the friction problem, the post and socket mounting trays remain difficult to adjust positionally relative to the high chair as the tray posts often bind or stick.
Data Source
AI summary
A high chair is equipped with a tray system incorporating a multiple tray structure that is positionally adjustable relative to the high chair structure. The tray system includes a smaller lower tray formed with rearwardly extending, horizontal posts that are received within horizontally aligned sockets in the high chair structure. The distal ends of the tray posts are provided with rollers, and the high chair sockets have rollers, to provide for a smooth insertion of the posts into the sockets. The larger upper tray is detachably mounted on the lower tray for positional adjustment with the lower tray by releasing the tray posts for movement within the high chair sockets. The larger tray is formed with a depression to allow access to the position adjustment actuator. A third tray can be supported on the larger tray to facilitate cleaning of the tray system.